main.go

   1package main
   2
   3import (
   4	"archive/tar"
   5	"bytes"
   6	"compress/gzip"
   7	"encoding/base64"
   8	"encoding/json"
   9	"fmt"
  10	"io"
  11	"log"
  12	"net/http"
  13	"os"
  14	"os/exec"
  15	"path/filepath"
  16	"regexp"
  17	"runtime"
  18	"strings"
  19	"sync"
  20	"time"
  21
  22	tea "github.com/charmbracelet/bubbletea"
  23	"github.com/floatpane/matcha/config"
  24	"github.com/floatpane/matcha/fetcher"
  25	"github.com/floatpane/matcha/sender"
  26	"github.com/floatpane/matcha/tui"
  27	"github.com/google/uuid"
  28	"github.com/yuin/goldmark"
  29	"github.com/yuin/goldmark/renderer/html"
  30)
  31
  32const (
  33	initialEmailLimit = 20
  34	paginationLimit   = 20
  35)
  36
  37// Version variables are injected by the build (GoReleaser ldflags).
  38// They default to "dev" when not set by the build system.
  39var (
  40	version = "dev"
  41	commit  = ""
  42	date    = ""
  43)
  44
  45// UpdateAvailableMsg is sent into the TUI when a newer release is detected.
  46type UpdateAvailableMsg struct {
  47	Latest  string
  48	Current string
  49}
  50
  51// internal struct for parsing GitHub release JSON.
  52type githubRelease struct {
  53	TagName string `json:"tag_name"`
  54	Assets  []struct {
  55		Name               string `json:"name"`
  56		BrowserDownloadURL string `json:"browser_download_url"`
  57	} `json:"assets"`
  58}
  59
  60type mainModel struct {
  61	current       tea.Model
  62	previousModel tea.Model
  63	config        *config.Config
  64	emails        []fetcher.Email
  65	emailsByAcct  map[string][]fetcher.Email
  66	sentEmails    []fetcher.Email
  67	sentByAcct    map[string][]fetcher.Email
  68	inbox         *tui.Inbox
  69	sentInbox     *tui.Inbox
  70	width         int
  71	height        int
  72	err           error
  73}
  74
  75func newInitialModel(cfg *config.Config) *mainModel {
  76	initialModel := &mainModel{
  77		emailsByAcct: make(map[string][]fetcher.Email),
  78		sentByAcct:   make(map[string][]fetcher.Email),
  79	}
  80
  81	if cfg == nil || !cfg.HasAccounts() {
  82		initialModel.current = tui.NewLogin()
  83	} else {
  84		initialModel.current = tui.NewChoice()
  85		initialModel.config = cfg
  86	}
  87	return initialModel
  88}
  89
  90func (m *mainModel) Init() tea.Cmd {
  91	return tea.Batch(m.current.Init(), checkForUpdatesCmd())
  92}
  93
  94func (m *mainModel) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
  95	var cmd tea.Cmd
  96	var cmds []tea.Cmd
  97
  98	m.current, cmd = m.current.Update(msg)
  99	cmds = append(cmds, cmd)
 100
 101	switch msg := msg.(type) {
 102	case tea.WindowSizeMsg:
 103		m.width = msg.Width
 104		m.height = msg.Height
 105		return m, nil
 106
 107	case tea.KeyMsg:
 108		if msg.String() == "ctrl+c" {
 109			return m, tea.Quit
 110		}
 111		if msg.String() == "esc" {
 112			switch m.current.(type) {
 113			case *tui.FilePicker:
 114				return m, func() tea.Msg { return tui.CancelFilePickerMsg{} }
 115			case *tui.Inbox, *tui.Login:
 116				m.current = tui.NewChoice()
 117				return m, m.current.Init()
 118			}
 119		}
 120
 121	case tui.BackToInboxMsg:
 122		if m.inbox != nil {
 123			m.current = m.inbox
 124		} else {
 125			m.current = tui.NewChoice()
 126		}
 127		return m, nil
 128
 129	case tui.BackToMailboxMsg:
 130		switch msg.Mailbox {
 131		case tui.MailboxSent:
 132			if m.sentInbox != nil {
 133				m.current = m.sentInbox
 134				return m, nil
 135			}
 136		case tui.MailboxInbox:
 137			if m.inbox != nil {
 138				m.current = m.inbox
 139				return m, nil
 140			}
 141		}
 142		m.current = tui.NewChoice()
 143		return m, nil
 144
 145	case tui.DiscardDraftMsg:
 146		// Save draft to disk
 147		if msg.ComposerState != nil {
 148			draft := msg.ComposerState.ToDraft()
 149			go func() {
 150				if err := config.SaveDraft(draft); err != nil {
 151					log.Printf("Error saving draft: %v", err)
 152				}
 153			}()
 154		}
 155		m.current = tui.NewChoice()
 156		return m, m.current.Init()
 157
 158	case tui.Credentials:
 159		// Add new account or update existing
 160		account := config.Account{
 161			ID:              uuid.New().String(),
 162			Name:            msg.Name,
 163			Email:           msg.Host, // login/email used for authentication comes from Host field in the form
 164			Password:        msg.Password,
 165			ServiceProvider: msg.Provider,
 166			FetchEmail:      msg.FetchEmail,
 167		}
 168
 169		if msg.Provider == "custom" {
 170			account.IMAPServer = msg.IMAPServer
 171			account.IMAPPort = msg.IMAPPort
 172			account.SMTPServer = msg.SMTPServer
 173			account.SMTPPort = msg.SMTPPort
 174		}
 175
 176		// Ensure FetchEmail defaults to the login Email (Host) if not explicitly set
 177		if account.FetchEmail == "" && account.Email != "" {
 178			account.FetchEmail = account.Email
 179		}
 180
 181		if m.config == nil {
 182			m.config = &config.Config{}
 183		}
 184
 185		// Check if we're editing an existing account
 186		if login, ok := m.current.(*tui.Login); ok && login.IsEditMode() {
 187			// Find and update the existing account
 188			existingID := login.GetAccountID()
 189			for i, acc := range m.config.Accounts {
 190				if acc.ID == existingID {
 191					account.ID = existingID
 192					m.config.Accounts[i] = account
 193					break
 194				}
 195			}
 196		} else {
 197			m.config.AddAccount(account)
 198		}
 199
 200		if err := config.SaveConfig(m.config); err != nil {
 201			log.Printf("could not save config: %v", err)
 202			return m, tea.Quit
 203		}
 204
 205		m.current = tui.NewChoice()
 206		return m, m.current.Init()
 207
 208	case tui.GoToInboxMsg:
 209		if m.config == nil || !m.config.HasAccounts() {
 210			m.current = tui.NewLogin()
 211			return m, m.current.Init()
 212		}
 213		// Try to load from cache first for instant display
 214		if config.HasEmailCache() {
 215			return m, loadCachedEmails()
 216		}
 217		// No cache, fetch normally
 218		m.current = tui.NewStatus("Fetching emails from all accounts...")
 219		return m, tea.Batch(m.current.Init(), fetchAllAccountsEmails(m.config, tui.MailboxInbox))
 220
 221	case tui.GoToSentInboxMsg:
 222		if m.config == nil || !m.config.HasAccounts() {
 223			m.current = tui.NewLogin()
 224			return m, m.current.Init()
 225		}
 226		m.current = tui.NewStatus("Fetching sent emails from all accounts...")
 227		return m, tea.Batch(m.current.Init(), fetchAllAccountsEmails(m.config, tui.MailboxSent))
 228
 229	case tui.CachedEmailsLoadedMsg:
 230		if msg.Cache == nil {
 231			// Cache load failed, fetch normally
 232			m.current = tui.NewStatus("Fetching emails from all accounts...")
 233			return m, tea.Batch(m.current.Init(), fetchAllAccountsEmails(m.config, tui.MailboxInbox))
 234		}
 235
 236		// Convert cached emails to fetcher.Email
 237		var cachedEmails []fetcher.Email
 238		emailsByAcct := make(map[string][]fetcher.Email)
 239		for _, cached := range msg.Cache.Emails {
 240			email := fetcher.Email{
 241				UID:       cached.UID,
 242				From:      cached.From,
 243				To:        cached.To,
 244				Subject:   cached.Subject,
 245				Date:      cached.Date,
 246				MessageID: cached.MessageID,
 247				AccountID: cached.AccountID,
 248			}
 249			cachedEmails = append(cachedEmails, email)
 250			emailsByAcct[cached.AccountID] = append(emailsByAcct[cached.AccountID], email)
 251		}
 252
 253		m.emails = cachedEmails
 254		m.emailsByAcct = emailsByAcct
 255		m.inbox = tui.NewInbox(m.emails, m.config.Accounts)
 256		m.current = m.inbox
 257		m.current, _ = m.current.Update(tea.WindowSizeMsg{Width: m.width, Height: m.height})
 258
 259		// Start background refresh
 260		return m, tea.Batch(
 261			m.current.Init(),
 262			func() tea.Msg { return tui.RefreshingEmailsMsg{Mailbox: tui.MailboxInbox} },
 263			refreshEmails(m.config, tui.MailboxInbox),
 264		)
 265
 266	case tui.RequestRefreshMsg:
 267		return m, tea.Batch(
 268			func() tea.Msg { return tui.RefreshingEmailsMsg{Mailbox: msg.Mailbox} },
 269			refreshEmails(m.config, msg.Mailbox),
 270		)
 271
 272	case tui.EmailsRefreshedMsg:
 273		if msg.Mailbox == tui.MailboxSent {
 274			m.sentByAcct = msg.EmailsByAccount
 275			m.sentEmails = flattenAndSort(msg.EmailsByAccount)
 276			if m.sentInbox != nil {
 277				m.sentInbox.SetEmails(m.sentEmails, m.config.Accounts)
 278				m.current, _ = m.current.Update(msg)
 279			}
 280			return m, nil
 281		}
 282
 283		m.emailsByAcct = msg.EmailsByAccount
 284		m.emails = flattenAndSort(msg.EmailsByAccount)
 285
 286		// Save to cache (inbox only)
 287		go saveEmailsToCache(m.emails)
 288
 289		// Update inbox if it exists
 290		if m.inbox != nil {
 291			m.inbox.SetEmails(m.emails, m.config.Accounts)
 292			// Forward the message to inbox to clear refreshing state
 293			m.current, _ = m.current.Update(msg)
 294		}
 295		return m, nil
 296
 297	case tui.AllEmailsFetchedMsg:
 298		if msg.Mailbox == tui.MailboxSent {
 299			m.sentByAcct = msg.EmailsByAccount
 300			m.sentEmails = flattenAndSort(msg.EmailsByAccount)
 301
 302			m.sentInbox = tui.NewSentInbox(m.sentEmails, m.config.Accounts)
 303			m.current = m.sentInbox
 304			m.current, _ = m.current.Update(tea.WindowSizeMsg{Width: m.width, Height: m.height})
 305			return m, m.current.Init()
 306		}
 307
 308		m.emailsByAcct = msg.EmailsByAccount
 309		m.emails = flattenAndSort(msg.EmailsByAccount)
 310
 311		// Save to cache
 312		go saveEmailsToCache(m.emails)
 313
 314		m.inbox = tui.NewInbox(m.emails, m.config.Accounts)
 315		m.current = m.inbox
 316		m.current, _ = m.current.Update(tea.WindowSizeMsg{Width: m.width, Height: m.height})
 317		return m, m.current.Init()
 318
 319	case tui.EmailsFetchedMsg:
 320		if msg.Mailbox == tui.MailboxSent {
 321			if m.sentByAcct == nil {
 322				m.sentByAcct = make(map[string][]fetcher.Email)
 323			}
 324			m.sentByAcct[msg.AccountID] = msg.Emails
 325			m.sentEmails = flattenAndSort(m.sentByAcct)
 326			if m.sentInbox == nil {
 327				m.sentInbox = tui.NewSentInbox(m.sentEmails, m.config.Accounts)
 328			} else {
 329				m.sentInbox.SetEmails(m.sentEmails, m.config.Accounts)
 330			}
 331			m.current = m.sentInbox
 332			m.current, _ = m.current.Update(tea.WindowSizeMsg{Width: m.width, Height: m.height})
 333			return m, m.current.Init()
 334		}
 335
 336		// Inbox path
 337		if m.emailsByAcct == nil {
 338			m.emailsByAcct = make(map[string][]fetcher.Email)
 339		}
 340		m.emailsByAcct[msg.AccountID] = msg.Emails
 341		m.emails = flattenAndSort(m.emailsByAcct)
 342		if m.inbox == nil {
 343			m.inbox = tui.NewInbox(m.emails, m.config.Accounts)
 344		} else {
 345			m.inbox.SetEmails(m.emails, m.config.Accounts)
 346		}
 347		m.current = m.inbox
 348		m.current, _ = m.current.Update(tea.WindowSizeMsg{Width: m.width, Height: m.height})
 349		return m, m.current.Init()
 350
 351	case tui.FetchMoreEmailsMsg:
 352		if msg.AccountID == "" {
 353			return m, nil // Don't fetch more for "ALL" view
 354		}
 355		account := m.config.GetAccountByID(msg.AccountID)
 356		if account == nil {
 357			return m, nil
 358		}
 359		return m, tea.Batch(
 360			func() tea.Msg { return tui.FetchingMoreEmailsMsg{} },
 361			fetchEmails(account, paginationLimit, msg.Offset, msg.Mailbox),
 362		)
 363
 364	case tui.EmailsAppendedMsg:
 365		if msg.Mailbox == tui.MailboxSent {
 366			if m.sentByAcct == nil {
 367				m.sentByAcct = make(map[string][]fetcher.Email)
 368			}
 369			m.sentByAcct[msg.AccountID] = append(m.sentByAcct[msg.AccountID], msg.Emails...)
 370			m.sentEmails = append(m.sentEmails, msg.Emails...)
 371			return m, nil
 372		}
 373		// Inbox
 374		if m.emailsByAcct == nil {
 375			m.emailsByAcct = make(map[string][]fetcher.Email)
 376		}
 377		m.emailsByAcct[msg.AccountID] = append(m.emailsByAcct[msg.AccountID], msg.Emails...)
 378		m.emails = append(m.emails, msg.Emails...)
 379		return m, nil
 380
 381	case tui.GoToSendMsg:
 382		if m.config != nil && len(m.config.Accounts) > 0 {
 383			firstAccount := m.config.GetFirstAccount()
 384			composer := tui.NewComposerWithAccounts(m.config.Accounts, firstAccount.ID, msg.To, msg.Subject, msg.Body)
 385			m.current = composer
 386		} else {
 387			m.current = tui.NewComposer("", msg.To, msg.Subject, msg.Body)
 388		}
 389		m.current, _ = m.current.Update(tea.WindowSizeMsg{Width: m.width, Height: m.height})
 390		return m, m.current.Init()
 391
 392	case tui.GoToDraftsMsg:
 393		drafts := config.GetAllDrafts()
 394		m.current = tui.NewDrafts(drafts)
 395		m.current, _ = m.current.Update(tea.WindowSizeMsg{Width: m.width, Height: m.height})
 396		return m, m.current.Init()
 397
 398	case tui.OpenDraftMsg:
 399		var accounts []config.Account
 400		if m.config != nil {
 401			accounts = m.config.Accounts
 402		}
 403		composer := tui.NewComposerFromDraft(msg.Draft, accounts)
 404		m.current = composer
 405		m.current, _ = m.current.Update(tea.WindowSizeMsg{Width: m.width, Height: m.height})
 406		return m, m.current.Init()
 407
 408	case tui.DeleteSavedDraftMsg:
 409		go func() {
 410			if err := config.DeleteDraft(msg.DraftID); err != nil {
 411				log.Printf("Error deleting draft: %v", err)
 412			}
 413		}()
 414		// Send message back to drafts view
 415		m.current, cmd = m.current.Update(tui.DraftDeletedMsg{DraftID: msg.DraftID})
 416		return m, cmd
 417
 418	case tui.GoToSettingsMsg:
 419		if m.config != nil {
 420			m.current = tui.NewSettings(m.config.Accounts)
 421		} else {
 422			m.current = tui.NewSettings(nil)
 423		}
 424		m.current, _ = m.current.Update(tea.WindowSizeMsg{Width: m.width, Height: m.height})
 425		return m, m.current.Init()
 426
 427	case tui.GoToAddAccountMsg:
 428		m.current = tui.NewLogin()
 429		m.current, _ = m.current.Update(tea.WindowSizeMsg{Width: m.width, Height: m.height})
 430		return m, m.current.Init()
 431
 432	case tui.GoToChoiceMenuMsg:
 433		m.current = tui.NewChoice()
 434		return m, m.current.Init()
 435
 436	case tui.DeleteAccountMsg:
 437		if m.config != nil {
 438			m.config.RemoveAccount(msg.AccountID)
 439			if err := config.SaveConfig(m.config); err != nil {
 440				log.Printf("could not save config: %v", err)
 441			}
 442			// Remove emails for this account
 443			delete(m.emailsByAcct, msg.AccountID)
 444
 445			// Rebuild all emails
 446			var allEmails []fetcher.Email
 447			for _, emails := range m.emailsByAcct {
 448				allEmails = append(allEmails, emails...)
 449			}
 450			m.emails = allEmails
 451
 452			// Go back to settings
 453			m.current = tui.NewSettings(m.config.Accounts)
 454			m.current, _ = m.current.Update(tea.WindowSizeMsg{Width: m.width, Height: m.height})
 455		}
 456		return m, m.current.Init()
 457
 458	case tui.ViewEmailMsg:
 459		email := m.getEmailByUIDAndAccount(msg.UID, msg.AccountID, msg.Mailbox)
 460		if email == nil {
 461			return m, nil
 462		}
 463		m.current = tui.NewStatus("Fetching email content...")
 464		return m, tea.Batch(m.current.Init(), fetchEmailBodyCmd(m.config, *email, msg.UID, msg.AccountID, msg.Mailbox))
 465
 466	case tui.EmailBodyFetchedMsg:
 467		if msg.Err != nil {
 468			log.Printf("could not fetch email body: %v", msg.Err)
 469			if msg.Mailbox == tui.MailboxSent && m.sentInbox != nil {
 470				m.current = m.sentInbox
 471			} else {
 472				m.current = m.inbox
 473			}
 474			return m, nil
 475		}
 476
 477		// Update the email in our stores
 478		m.updateEmailBodyByUID(msg.UID, msg.AccountID, msg.Mailbox, msg.Body, msg.Attachments)
 479
 480		email := m.getEmailByUIDAndAccount(msg.UID, msg.AccountID, msg.Mailbox)
 481		if email == nil {
 482			if msg.Mailbox == tui.MailboxSent && m.sentInbox != nil {
 483				m.current = m.sentInbox
 484			} else {
 485				m.current = m.inbox
 486			}
 487			return m, nil
 488		}
 489
 490		// Find the index for the email view (used for display purposes)
 491		emailIndex := m.getEmailIndex(msg.UID, msg.AccountID, msg.Mailbox)
 492		emailView := tui.NewEmailView(*email, emailIndex, m.width, m.height, msg.Mailbox)
 493		m.current = emailView
 494		return m, m.current.Init()
 495
 496	case tui.ReplyToEmailMsg:
 497		to := msg.Email.From
 498		subject := "Re: " + msg.Email.Subject
 499		body := fmt.Sprintf("\n\nOn %s, %s wrote:\n> %s", msg.Email.Date.Format("Jan 2, 2006 at 3:04 PM"), msg.Email.From, strings.ReplaceAll(msg.Email.Body, "\n", "\n> "))
 500
 501		if m.config != nil && len(m.config.Accounts) > 0 {
 502			// Use the account that received the email
 503			accountID := msg.Email.AccountID
 504			if accountID == "" {
 505				accountID = m.config.GetFirstAccount().ID
 506			}
 507			composer := tui.NewComposerWithAccounts(m.config.Accounts, accountID, to, subject, body)
 508			m.current = composer
 509		} else {
 510			m.current = tui.NewComposer("", to, subject, body)
 511		}
 512		m.current, _ = m.current.Update(tea.WindowSizeMsg{Width: m.width, Height: m.height})
 513		return m, m.current.Init()
 514
 515	case tui.GoToFilePickerMsg:
 516		m.previousModel = m.current
 517		wd, _ := os.Getwd()
 518		m.current = tui.NewFilePicker(wd)
 519		m.current, _ = m.current.Update(tea.WindowSizeMsg{Width: m.width, Height: m.height})
 520		return m, m.current.Init()
 521
 522	case tui.FileSelectedMsg, tui.CancelFilePickerMsg:
 523		if m.previousModel != nil {
 524			m.current = m.previousModel
 525			m.previousModel = nil
 526		}
 527		m.current, cmd = m.current.Update(msg)
 528		cmds = append(cmds, cmd)
 529
 530	case tui.SendEmailMsg:
 531		// Get draft ID before clearing composer (if it's a composer)
 532		var draftID string
 533		if composer, ok := m.current.(*tui.Composer); ok {
 534			draftID = composer.GetDraftID()
 535		}
 536		m.current = tui.NewStatus("Sending email...")
 537
 538		// Get the account to send from
 539		var account *config.Account
 540		if msg.AccountID != "" && m.config != nil {
 541			account = m.config.GetAccountByID(msg.AccountID)
 542		}
 543		if account == nil && m.config != nil {
 544			account = m.config.GetFirstAccount()
 545		}
 546
 547		// Save contact and delete draft in background
 548		go func() {
 549			// Save the recipient as a contact
 550			if msg.To != "" {
 551				// Parse "Name <email>" format
 552				name, email := parseEmailAddress(msg.To)
 553				if err := config.AddContact(name, email); err != nil {
 554					log.Printf("Error saving contact: %v", err)
 555				}
 556			}
 557			// Delete the draft since email is being sent
 558			if draftID != "" {
 559				if err := config.DeleteDraft(draftID); err != nil {
 560					log.Printf("Error deleting draft after send: %v", err)
 561				}
 562			}
 563		}()
 564
 565		return m, tea.Batch(m.current.Init(), sendEmail(account, msg))
 566
 567	case tui.EmailResultMsg:
 568		m.current = tui.NewChoice()
 569		return m, m.current.Init()
 570
 571	case tui.DeleteEmailMsg:
 572		m.previousModel = m.current
 573		m.current = tui.NewStatus("Deleting email...")
 574
 575		account := m.config.GetAccountByID(msg.AccountID)
 576		if account == nil {
 577			if msg.Mailbox == tui.MailboxSent && m.sentInbox != nil {
 578				m.current = m.sentInbox
 579			} else {
 580				m.current = m.inbox
 581			}
 582			return m, nil
 583		}
 584
 585		return m, tea.Batch(m.current.Init(), deleteEmailCmd(account, msg.UID, msg.AccountID, msg.Mailbox))
 586
 587	case tui.ArchiveEmailMsg:
 588		m.previousModel = m.current
 589		m.current = tui.NewStatus("Archiving email...")
 590
 591		account := m.config.GetAccountByID(msg.AccountID)
 592		if account == nil {
 593			if msg.Mailbox == tui.MailboxSent && m.sentInbox != nil {
 594				m.current = m.sentInbox
 595			} else {
 596				m.current = m.inbox
 597			}
 598			return m, nil
 599		}
 600
 601		return m, tea.Batch(m.current.Init(), archiveEmailCmd(account, msg.UID, msg.AccountID, msg.Mailbox))
 602
 603	case tui.EmailActionDoneMsg:
 604		if msg.Err != nil {
 605			log.Printf("Action failed: %v", msg.Err)
 606			if msg.Mailbox == tui.MailboxSent && m.sentInbox != nil {
 607				m.current = m.sentInbox
 608			} else {
 609				m.current = m.inbox
 610			}
 611			return m, nil
 612		}
 613
 614		// Remove email from stores
 615		m.removeEmailByMailbox(msg.UID, msg.AccountID, msg.Mailbox)
 616
 617		if msg.Mailbox == tui.MailboxSent {
 618			if m.sentInbox != nil {
 619				m.sentInbox.RemoveEmail(msg.UID, msg.AccountID)
 620				m.current = m.sentInbox
 621				m.current, _ = m.current.Update(tea.WindowSizeMsg{Width: m.width, Height: m.height})
 622				return m, m.current.Init()
 623			}
 624			m.current = tui.NewChoice()
 625			return m, m.current.Init()
 626		}
 627
 628		if m.inbox != nil {
 629			m.inbox.RemoveEmail(msg.UID, msg.AccountID)
 630			m.current = m.inbox
 631			m.current, _ = m.current.Update(tea.WindowSizeMsg{Width: m.width, Height: m.height})
 632			return m, m.current.Init()
 633		}
 634		m.current = tui.NewChoice()
 635		return m, m.current.Init()
 636
 637	case tui.DownloadAttachmentMsg:
 638		m.previousModel = m.current
 639		m.current = tui.NewStatus(fmt.Sprintf("Downloading %s...", msg.Filename))
 640
 641		account := m.config.GetAccountByID(msg.AccountID)
 642		if account == nil {
 643			m.current = m.previousModel
 644			return m, nil
 645		}
 646
 647		email := m.getEmailByIndex(msg.Index, msg.Mailbox)
 648		if email == nil {
 649			m.current = m.previousModel
 650			return m, nil
 651		}
 652
 653		// Find the correct attachment to get encoding
 654		var encoding string
 655		for _, att := range email.Attachments {
 656			if att.PartID == msg.PartID {
 657				encoding = att.Encoding
 658				break
 659			}
 660		}
 661		newMsg := tui.DownloadAttachmentMsg{
 662			Index:     msg.Index,
 663			Filename:  msg.Filename,
 664			PartID:    msg.PartID,
 665			Data:      msg.Data,
 666			AccountID: msg.AccountID,
 667			Encoding:  encoding,
 668			Mailbox:   msg.Mailbox,
 669		}
 670		return m, tea.Batch(m.current.Init(), downloadAttachmentCmd(account, email.UID, newMsg))
 671
 672	case tui.AttachmentDownloadedMsg:
 673		var statusMsg string
 674		if msg.Err != nil {
 675			statusMsg = fmt.Sprintf("Error downloading: %v", msg.Err)
 676		} else {
 677			statusMsg = fmt.Sprintf("Saved to %s", msg.Path)
 678		}
 679		m.current = tui.NewStatus(statusMsg)
 680		return m, tea.Tick(2*time.Second, func(t time.Time) tea.Msg {
 681			return tui.RestoreViewMsg{}
 682		})
 683
 684	case tui.RestoreViewMsg:
 685		if m.previousModel != nil {
 686			m.current = m.previousModel
 687			m.previousModel = nil
 688		}
 689		return m, nil
 690	}
 691
 692	return m, tea.Batch(cmds...)
 693}
 694
 695func (m *mainModel) getEmailByIndex(index int, mailbox tui.MailboxKind) *fetcher.Email {
 696	switch mailbox {
 697	case tui.MailboxSent:
 698		if index >= 0 && index < len(m.sentEmails) {
 699			return &m.sentEmails[index]
 700		}
 701	default:
 702		if index >= 0 && index < len(m.emails) {
 703			return &m.emails[index]
 704		}
 705	}
 706	return nil
 707}
 708
 709func (m *mainModel) getEmailByUIDAndAccount(uid uint32, accountID string, mailbox tui.MailboxKind) *fetcher.Email {
 710	switch mailbox {
 711	case tui.MailboxSent:
 712		for i := range m.sentEmails {
 713			if m.sentEmails[i].UID == uid && m.sentEmails[i].AccountID == accountID {
 714				return &m.sentEmails[i]
 715			}
 716		}
 717	default:
 718		for i := range m.emails {
 719			if m.emails[i].UID == uid && m.emails[i].AccountID == accountID {
 720				return &m.emails[i]
 721			}
 722		}
 723	}
 724	return nil
 725}
 726
 727func (m *mainModel) getEmailIndex(uid uint32, accountID string, mailbox tui.MailboxKind) int {
 728	switch mailbox {
 729	case tui.MailboxSent:
 730		for i := range m.sentEmails {
 731			if m.sentEmails[i].UID == uid && m.sentEmails[i].AccountID == accountID {
 732				return i
 733			}
 734		}
 735	default:
 736		for i := range m.emails {
 737			if m.emails[i].UID == uid && m.emails[i].AccountID == accountID {
 738				return i
 739			}
 740		}
 741	}
 742	return -1
 743}
 744
 745func (m *mainModel) updateEmailBodyByUID(uid uint32, accountID string, mailbox tui.MailboxKind, body string, attachments []fetcher.Attachment) {
 746	switch mailbox {
 747	case tui.MailboxSent:
 748		for i := range m.sentEmails {
 749			if m.sentEmails[i].UID == uid && m.sentEmails[i].AccountID == accountID {
 750				m.sentEmails[i].Body = body
 751				m.sentEmails[i].Attachments = attachments
 752				break
 753			}
 754		}
 755		if emails, ok := m.sentByAcct[accountID]; ok {
 756			for i := range emails {
 757				if emails[i].UID == uid {
 758					emails[i].Body = body
 759					emails[i].Attachments = attachments
 760					break
 761				}
 762			}
 763		}
 764	default:
 765		for i := range m.emails {
 766			if m.emails[i].UID == uid && m.emails[i].AccountID == accountID {
 767				m.emails[i].Body = body
 768				m.emails[i].Attachments = attachments
 769				break
 770			}
 771		}
 772		if emails, ok := m.emailsByAcct[accountID]; ok {
 773			for i := range emails {
 774				if emails[i].UID == uid {
 775					emails[i].Body = body
 776					emails[i].Attachments = attachments
 777					break
 778				}
 779			}
 780		}
 781	}
 782}
 783
 784func (m *mainModel) removeEmailByMailbox(uid uint32, accountID string, mailbox tui.MailboxKind) {
 785	switch mailbox {
 786	case tui.MailboxSent:
 787		var filtered []fetcher.Email
 788		for _, e := range m.sentEmails {
 789			if !(e.UID == uid && e.AccountID == accountID) {
 790				filtered = append(filtered, e)
 791			}
 792		}
 793		m.sentEmails = filtered
 794		if emails, ok := m.sentByAcct[accountID]; ok {
 795			var filteredAcct []fetcher.Email
 796			for _, e := range emails {
 797				if e.UID != uid {
 798					filteredAcct = append(filteredAcct, e)
 799				}
 800			}
 801			m.sentByAcct[accountID] = filteredAcct
 802		}
 803	default:
 804		var filtered []fetcher.Email
 805		for _, e := range m.emails {
 806			if !(e.UID == uid && e.AccountID == accountID) {
 807				filtered = append(filtered, e)
 808			}
 809		}
 810		m.emails = filtered
 811		if emails, ok := m.emailsByAcct[accountID]; ok {
 812			var filteredAcct []fetcher.Email
 813			for _, e := range emails {
 814				if e.UID != uid {
 815					filteredAcct = append(filteredAcct, e)
 816				}
 817			}
 818			m.emailsByAcct[accountID] = filteredAcct
 819		}
 820	}
 821}
 822
 823func (m *mainModel) View() string {
 824	return m.current.View()
 825}
 826
 827func flattenAndSort(emailsByAccount map[string][]fetcher.Email) []fetcher.Email {
 828	var allEmails []fetcher.Email
 829	for _, emails := range emailsByAccount {
 830		allEmails = append(allEmails, emails...)
 831	}
 832	for i := 0; i < len(allEmails); i++ {
 833		for j := i + 1; j < len(allEmails); j++ {
 834			if allEmails[j].Date.After(allEmails[i].Date) {
 835				allEmails[i], allEmails[j] = allEmails[j], allEmails[i]
 836			}
 837		}
 838	}
 839	return allEmails
 840}
 841
 842func fetchAllAccountsEmails(cfg *config.Config, mailbox tui.MailboxKind) tea.Cmd {
 843	return func() tea.Msg {
 844		emailsByAccount := make(map[string][]fetcher.Email)
 845		var mu sync.Mutex
 846		var wg sync.WaitGroup
 847
 848		for _, account := range cfg.Accounts {
 849			wg.Add(1)
 850			go func(acc config.Account) {
 851				defer wg.Done()
 852				var emails []fetcher.Email
 853				var err error
 854				if mailbox == tui.MailboxSent {
 855					emails, err = fetcher.FetchSentEmails(&acc, initialEmailLimit, 0)
 856				} else {
 857					emails, err = fetcher.FetchEmails(&acc, initialEmailLimit, 0)
 858				}
 859				if err != nil {
 860					log.Printf("Error fetching from %s: %v", acc.Email, err)
 861					return
 862				}
 863				mu.Lock()
 864				emailsByAccount[acc.ID] = emails
 865				mu.Unlock()
 866			}(account)
 867		}
 868
 869		wg.Wait()
 870		return tui.AllEmailsFetchedMsg{EmailsByAccount: emailsByAccount, Mailbox: mailbox}
 871	}
 872}
 873
 874func fetchEmails(account *config.Account, limit, offset uint32, mailbox tui.MailboxKind) tea.Cmd {
 875	return func() tea.Msg {
 876		var emails []fetcher.Email
 877		var err error
 878		if mailbox == tui.MailboxSent {
 879			emails, err = fetcher.FetchSentEmails(account, limit, offset)
 880		} else {
 881			emails, err = fetcher.FetchEmails(account, limit, offset)
 882		}
 883		if err != nil {
 884			return tui.FetchErr(err)
 885		}
 886		if offset == 0 {
 887			return tui.EmailsFetchedMsg{Emails: emails, AccountID: account.ID, Mailbox: mailbox}
 888		}
 889		return tui.EmailsAppendedMsg{Emails: emails, AccountID: account.ID, Mailbox: mailbox}
 890	}
 891}
 892
 893func loadCachedEmails() tea.Cmd {
 894	return func() tea.Msg {
 895		cache, err := config.LoadEmailCache()
 896		if err != nil {
 897			return tui.CachedEmailsLoadedMsg{Cache: nil}
 898		}
 899		return tui.CachedEmailsLoadedMsg{Cache: cache}
 900	}
 901}
 902
 903func refreshEmails(cfg *config.Config, mailbox tui.MailboxKind) tea.Cmd {
 904	return func() tea.Msg {
 905		emailsByAccount := make(map[string][]fetcher.Email)
 906		var mu sync.Mutex
 907		var wg sync.WaitGroup
 908
 909		for _, account := range cfg.Accounts {
 910			wg.Add(1)
 911			go func(acc config.Account) {
 912				defer wg.Done()
 913				var emails []fetcher.Email
 914				var err error
 915				if mailbox == tui.MailboxSent {
 916					emails, err = fetcher.FetchSentEmails(&acc, initialEmailLimit, 0)
 917				} else {
 918					emails, err = fetcher.FetchEmails(&acc, initialEmailLimit, 0)
 919				}
 920				if err != nil {
 921					log.Printf("Error fetching from %s: %v", acc.Email, err)
 922					return
 923				}
 924				mu.Lock()
 925				emailsByAccount[acc.ID] = emails
 926				mu.Unlock()
 927			}(account)
 928		}
 929
 930		wg.Wait()
 931		return tui.EmailsRefreshedMsg{EmailsByAccount: emailsByAccount, Mailbox: mailbox}
 932	}
 933}
 934
 935func saveEmailsToCache(emails []fetcher.Email) {
 936	var cachedEmails []config.CachedEmail
 937	for _, email := range emails {
 938		cachedEmails = append(cachedEmails, config.CachedEmail{
 939			UID:       email.UID,
 940			From:      email.From,
 941			To:        email.To,
 942			Subject:   email.Subject,
 943			Date:      email.Date,
 944			MessageID: email.MessageID,
 945			AccountID: email.AccountID,
 946		})
 947
 948		// Save sender as a contact
 949		if email.From != "" {
 950			name, emailAddr := parseEmailAddress(email.From)
 951			if err := config.AddContact(name, emailAddr); err != nil {
 952				log.Printf("Error saving contact from email: %v", err)
 953			}
 954		}
 955	}
 956	cache := &config.EmailCache{Emails: cachedEmails}
 957	if err := config.SaveEmailCache(cache); err != nil {
 958		log.Printf("Error saving email cache: %v", err)
 959	}
 960}
 961
 962// parseEmailAddress parses "Name <email>" or just "email" format
 963func parseEmailAddress(addr string) (name, email string) {
 964	addr = strings.TrimSpace(addr)
 965	if idx := strings.Index(addr, "<"); idx != -1 {
 966		name = strings.TrimSpace(addr[:idx])
 967		endIdx := strings.Index(addr, ">")
 968		if endIdx > idx {
 969			email = strings.TrimSpace(addr[idx+1 : endIdx])
 970		} else {
 971			email = strings.TrimSpace(addr[idx+1:])
 972		}
 973	} else {
 974		email = addr
 975	}
 976	return name, email
 977}
 978
 979func fetchEmailBodyCmd(cfg *config.Config, email fetcher.Email, uid uint32, accountID string, mailbox tui.MailboxKind) tea.Cmd {
 980	return func() tea.Msg {
 981		account := cfg.GetAccountByID(accountID)
 982		if account == nil {
 983			return tui.EmailBodyFetchedMsg{UID: uid, AccountID: accountID, Mailbox: mailbox, Err: fmt.Errorf("account not found")}
 984		}
 985
 986		var (
 987			body        string
 988			attachments []fetcher.Attachment
 989			err         error
 990		)
 991		if mailbox == tui.MailboxSent {
 992			body, attachments, err = fetcher.FetchSentEmailBody(account, uid)
 993		} else {
 994			body, attachments, err = fetcher.FetchEmailBody(account, uid)
 995		}
 996		if err != nil {
 997			return tui.EmailBodyFetchedMsg{UID: uid, AccountID: accountID, Mailbox: mailbox, Err: err}
 998		}
 999
1000		return tui.EmailBodyFetchedMsg{
1001			UID:         uid,
1002			Body:        body,
1003			Attachments: attachments,
1004			AccountID:   accountID,
1005			Mailbox:     mailbox,
1006		}
1007	}
1008}
1009
1010func markdownToHTML(md []byte) []byte {
1011	var buf bytes.Buffer
1012	p := goldmark.New(goldmark.WithRendererOptions(html.WithUnsafe()))
1013	if err := p.Convert(md, &buf); err != nil {
1014		return md
1015	}
1016	return buf.Bytes()
1017}
1018
1019func sendEmail(account *config.Account, msg tui.SendEmailMsg) tea.Cmd {
1020	return func() tea.Msg {
1021		if account == nil {
1022			return tui.EmailResultMsg{Err: fmt.Errorf("no account configured")}
1023		}
1024
1025		recipients := []string{msg.To}
1026		body := msg.Body
1027		images := make(map[string][]byte)
1028		attachments := make(map[string][]byte)
1029
1030		re := regexp.MustCompile(`!\[.*?\]\((.*?)\)`)
1031		matches := re.FindAllStringSubmatch(body, -1)
1032
1033		for _, match := range matches {
1034			imgPath := match[1]
1035			imgData, err := os.ReadFile(imgPath)
1036			if err != nil {
1037				log.Printf("Could not read image file %s: %v", imgPath, err)
1038				continue
1039			}
1040			cid := fmt.Sprintf("%s%s@%s", uuid.NewString(), filepath.Ext(imgPath), "matcha")
1041			images[cid] = []byte(base64.StdEncoding.EncodeToString(imgData))
1042			body = strings.Replace(body, imgPath, "cid:"+cid, 1)
1043		}
1044
1045		htmlBody := markdownToHTML([]byte(body))
1046
1047		if msg.AttachmentPath != "" {
1048			fileData, err := os.ReadFile(msg.AttachmentPath)
1049			if err != nil {
1050				log.Printf("Could not read attachment file %s: %v", msg.AttachmentPath, err)
1051			} else {
1052				_, filename := filepath.Split(msg.AttachmentPath)
1053				attachments[filename] = fileData
1054			}
1055		}
1056
1057		err := sender.SendEmail(account, recipients, msg.Subject, msg.Body, string(htmlBody), images, attachments, msg.InReplyTo, msg.References)
1058		if err != nil {
1059			log.Printf("Failed to send email: %v", err)
1060			return tui.EmailResultMsg{Err: err}
1061		}
1062		return tui.EmailResultMsg{}
1063	}
1064}
1065
1066func deleteEmailCmd(account *config.Account, uid uint32, accountID string, mailbox tui.MailboxKind) tea.Cmd {
1067	return func() tea.Msg {
1068		var err error
1069		if mailbox == tui.MailboxSent {
1070			err = fetcher.DeleteSentEmail(account, uid)
1071		} else {
1072			err = fetcher.DeleteEmail(account, uid)
1073		}
1074		return tui.EmailActionDoneMsg{UID: uid, AccountID: accountID, Mailbox: mailbox, Err: err}
1075	}
1076}
1077
1078func archiveEmailCmd(account *config.Account, uid uint32, accountID string, mailbox tui.MailboxKind) tea.Cmd {
1079	return func() tea.Msg {
1080		var err error
1081		if mailbox == tui.MailboxSent {
1082			err = fetcher.ArchiveSentEmail(account, uid)
1083		} else {
1084			err = fetcher.ArchiveEmail(account, uid)
1085		}
1086		return tui.EmailActionDoneMsg{UID: uid, AccountID: accountID, Mailbox: mailbox, Err: err}
1087	}
1088}
1089
1090func downloadAttachmentCmd(account *config.Account, uid uint32, msg tui.DownloadAttachmentMsg) tea.Cmd {
1091	return func() tea.Msg {
1092		// Download and decode the attachment using encoding provided in msg.Encoding.
1093		var data []byte
1094		var err error
1095		if msg.Mailbox == tui.MailboxSent {
1096			data, err = fetcher.FetchSentAttachment(account, uid, msg.PartID, msg.Encoding)
1097		} else {
1098			data, err = fetcher.FetchAttachment(account, uid, msg.PartID, msg.Encoding)
1099		}
1100		if err != nil {
1101			return tui.AttachmentDownloadedMsg{Err: err}
1102		}
1103
1104		homeDir, err := os.UserHomeDir()
1105		if err != nil {
1106			return tui.AttachmentDownloadedMsg{Err: err}
1107		}
1108		downloadsPath := filepath.Join(homeDir, "Downloads")
1109		if _, err := os.Stat(downloadsPath); os.IsNotExist(err) {
1110			if mkErr := os.MkdirAll(downloadsPath, 0755); mkErr != nil {
1111				return tui.AttachmentDownloadedMsg{Err: mkErr}
1112			}
1113		}
1114
1115		// Save the attachment using an exclusive create so we never overwrite an existing file.
1116		// If the filename already exists, append \" (n)\" before the extension.
1117		origName := msg.Filename
1118		ext := filepath.Ext(origName)
1119		base := strings.TrimSuffix(origName, ext)
1120		candidate := origName
1121		i := 1
1122		var filePath string
1123
1124		for {
1125			filePath = filepath.Join(downloadsPath, candidate)
1126
1127			// Try to create file exclusively. If it already exists, os.OpenFile will return an error
1128			// that satisfies os.IsExist(err), so we can increment the candidate.
1129			f, err := os.OpenFile(filePath, os.O_CREATE|os.O_EXCL|os.O_WRONLY, 0644)
1130			if err != nil {
1131				if os.IsExist(err) {
1132					// file exists, try next candidate
1133					candidate = fmt.Sprintf("%s (%d)%s", base, i, ext)
1134					i++
1135					continue
1136				}
1137				// Some other error while attempting to create file
1138				log.Printf("error creating file %s: %v", filePath, err)
1139				return tui.AttachmentDownloadedMsg{Err: err}
1140			}
1141
1142			// Successfully created the file descriptor; write and close.
1143			if _, writeErr := f.Write(data); writeErr != nil {
1144				_ = f.Close()
1145				log.Printf("error writing to file %s: %v", filePath, writeErr)
1146				return tui.AttachmentDownloadedMsg{Err: writeErr}
1147			}
1148			if closeErr := f.Close(); closeErr != nil {
1149				log.Printf("warning: error closing file %s: %v", filePath, closeErr)
1150			}
1151
1152			// file saved successfully
1153			break
1154		}
1155
1156		log.Printf("attachment saved to %s", filePath)
1157
1158		// Try to open the file using a platform-specific opener asynchronously and log the outcome.
1159		go func(p string) {
1160			var cmd *exec.Cmd
1161			switch runtime.GOOS {
1162			case "darwin":
1163				cmd = exec.Command("open", p)
1164			case "linux":
1165				cmd = exec.Command("xdg-open", p)
1166			case "windows":
1167				// 'start' is a cmd builtin; provide an empty title argument to avoid interpreting the path as the title.
1168				cmd = exec.Command("cmd", "/c", "start", "", p)
1169			default:
1170				// Unsupported OS: nothing to do.
1171				return
1172			}
1173			if err := cmd.Start(); err != nil {
1174				log.Printf("failed to open file %s: %v", p, err)
1175			}
1176		}(filePath)
1177
1178		return tui.AttachmentDownloadedMsg{Path: filePath, Err: nil}
1179	}
1180}
1181
1182/*
1183detectInstalledVersion returns a best-effort installed version string.
1184Priority:
1185 1. If the build-in `version` variable is set to something other than "dev", return it.
1186 2. If Homebrew is present and reports a version for `matcha`, return that.
1187 3. If snap is present and lists `matcha`, return that.
1188 4. Fallback to the build `version` (likely "dev").
1189*/
1190func detectInstalledVersion() string {
1191	v := strings.TrimSpace(version)
1192	if v != "dev" && v != "" {
1193		return v
1194	}
1195
1196	// Try Homebrew (macOS)
1197	if runtime.GOOS == "darwin" {
1198		if _, err := exec.LookPath("brew"); err == nil {
1199			// `brew list --versions matcha` prints: matcha 1.2.3
1200			if out, err := exec.Command("brew", "list", "--versions", "matcha").Output(); err == nil {
1201				parts := strings.Fields(string(out))
1202				if len(parts) >= 2 {
1203					return parts[1]
1204				}
1205			}
1206		}
1207	}
1208
1209	// Try snap (Linux)
1210	if runtime.GOOS == "linux" {
1211		if _, err := exec.LookPath("snap"); err == nil {
1212			if out, err := exec.Command("snap", "list", "matcha").Output(); err == nil {
1213				lines := strings.Split(strings.TrimSpace(string(out)), "\n")
1214				if len(lines) >= 2 {
1215					fields := strings.Fields(lines[1])
1216					if len(fields) >= 2 {
1217						return fields[1]
1218					}
1219				}
1220			}
1221		}
1222	}
1223
1224	return v
1225}
1226
1227/*
1228checkForUpdatesCmd queries GitHub for the latest release tag and returns a
1229tea.Msg (UpdateAvailableMsg) if the latest version differs from the current
1230installed version. This runs in the background when the TUI initializes.
1231*/
1232func checkForUpdatesCmd() tea.Cmd {
1233	return func() tea.Msg {
1234		// Non-fatal: if anything goes wrong we just don't show the update message.
1235		const api = "https://api.github.com/repos/floatpane/matcha/releases/latest"
1236		resp, err := http.Get(api)
1237		if err != nil {
1238			return nil
1239		}
1240		defer resp.Body.Close()
1241
1242		var rel githubRelease
1243		if err := json.NewDecoder(resp.Body).Decode(&rel); err != nil {
1244			return nil
1245		}
1246
1247		latest := strings.TrimPrefix(rel.TagName, "v")
1248		installed := strings.TrimPrefix(detectInstalledVersion(), "v")
1249		if latest != "" && installed != "" && latest != installed {
1250			return UpdateAvailableMsg{Latest: latest, Current: installed}
1251		}
1252		return nil
1253	}
1254}
1255
1256// runUpdateCLI implements the CLI entrypoint for `matcha update`.
1257// It detects the likely installation method and attempts the appropriate
1258// update path (Homebrew, Snap, or GitHub release binary extract).
1259func runUpdateCLI() error {
1260	const api = "https://api.github.com/repos/floatpane/matcha/releases/latest"
1261	resp, err := http.Get(api)
1262	if err != nil {
1263		return fmt.Errorf("could not query releases: %w", err)
1264	}
1265	defer resp.Body.Close()
1266
1267	var rel githubRelease
1268	if err := json.NewDecoder(resp.Body).Decode(&rel); err != nil {
1269		return fmt.Errorf("could not parse release info: %w", err)
1270	}
1271
1272	latestTag := rel.TagName
1273	if strings.HasPrefix(latestTag, "v") {
1274		latestTag = latestTag[1:]
1275	}
1276
1277	fmt.Printf("Current version: %s\n", version)
1278	fmt.Printf("Latest version: %s\n", latestTag)
1279
1280	// Quick check: if already up-to-date, exit
1281	cur := version
1282	if strings.HasPrefix(cur, "v") {
1283		cur = cur[1:]
1284	}
1285	if latestTag == "" || cur == latestTag {
1286		fmt.Println("Already up to date.")
1287		return nil
1288	}
1289
1290	// Detect Homebrew
1291	if _, err := exec.LookPath("brew"); err == nil {
1292		fmt.Println("Detected Homebrew — updating taps and attempting to upgrade via brew.")
1293
1294		updateCmd := exec.Command("brew", "update")
1295		updateCmd.Stdout = os.Stdout
1296		updateCmd.Stderr = os.Stderr
1297		if err := updateCmd.Run(); err != nil {
1298			fmt.Printf("Homebrew update failed: %v\n", err)
1299			// continue to attempt upgrade even if update failed
1300		}
1301
1302		upgradeCmd := exec.Command("brew", "upgrade", "floatpane/matcha/matcha")
1303		upgradeCmd.Stdout = os.Stdout
1304		upgradeCmd.Stderr = os.Stderr
1305		if err := upgradeCmd.Run(); err == nil {
1306			fmt.Println("Successfully upgraded via Homebrew.")
1307			return nil
1308		}
1309		fmt.Printf("Homebrew upgrade failed: %v\n", err)
1310		// fallthrough to other methods
1311	}
1312
1313	// Detect snap
1314	if _, err := exec.LookPath("snap"); err == nil {
1315		// Check if matcha is installed as a snap
1316		cmdCheck := exec.Command("snap", "list", "matcha")
1317		if err := cmdCheck.Run(); err == nil {
1318			fmt.Println("Detected Snap package — attempting to refresh.")
1319			cmd := exec.Command("snap", "refresh", "matcha")
1320			cmd.Stdout = os.Stdout
1321			cmd.Stderr = os.Stderr
1322			if err := cmd.Run(); err == nil {
1323				fmt.Println("Successfully refreshed snap.")
1324				return nil
1325			}
1326			fmt.Printf("Snap refresh failed: %v\n", err)
1327			// fallthrough
1328		}
1329	}
1330
1331	// Otherwise attempt to download the proper release asset and replace the binary.
1332	osName := runtime.GOOS
1333	arch := runtime.GOARCH
1334
1335	// Try to find a matching asset
1336	var assetURL, assetName string
1337	for _, a := range rel.Assets {
1338		n := strings.ToLower(a.Name)
1339		if strings.Contains(n, osName) && strings.Contains(n, arch) && (strings.HasSuffix(n, ".tar.gz") || strings.HasSuffix(n, ".tgz") || strings.HasSuffix(n, ".zip")) {
1340			assetURL = a.BrowserDownloadURL
1341			assetName = a.Name
1342			break
1343		}
1344	}
1345	if assetURL == "" {
1346		// Try any asset that contains 'matcha' and os/arch as a fallback
1347		for _, a := range rel.Assets {
1348			n := strings.ToLower(a.Name)
1349			if strings.Contains(n, "matcha") && (strings.Contains(n, osName) || strings.Contains(n, arch)) {
1350				assetURL = a.BrowserDownloadURL
1351				assetName = a.Name
1352				break
1353			}
1354		}
1355	}
1356
1357	if assetURL == "" {
1358		return fmt.Errorf("no suitable release artifact found for %s/%s", osName, arch)
1359	}
1360
1361	fmt.Printf("Found release asset: %s\n", assetName)
1362	fmt.Println("Downloading...")
1363
1364	// Download asset
1365	respAsset, err := http.Get(assetURL)
1366	if err != nil {
1367		return fmt.Errorf("download failed: %w", err)
1368	}
1369	defer respAsset.Body.Close()
1370
1371	// Create a temp file for the download
1372	tmpDir, err := os.MkdirTemp("", "matcha-update-*")
1373	if err != nil {
1374		return fmt.Errorf("could not create temp dir: %w", err)
1375	}
1376	defer os.RemoveAll(tmpDir)
1377
1378	assetPath := filepath.Join(tmpDir, assetName)
1379	outFile, err := os.Create(assetPath)
1380	if err != nil {
1381		return fmt.Errorf("could not create temp file: %w", err)
1382	}
1383	_, err = io.Copy(outFile, respAsset.Body)
1384	outFile.Close()
1385	if err != nil {
1386		return fmt.Errorf("could not write asset to disk: %w", err)
1387	}
1388
1389	// If it's a tar.gz, extract and find the `matcha` binary
1390	var binPath string
1391	if strings.HasSuffix(assetName, ".tar.gz") || strings.HasSuffix(assetName, ".tgz") {
1392		f, err := os.Open(assetPath)
1393		if err != nil {
1394			return fmt.Errorf("could not open archive: %w", err)
1395		}
1396		defer f.Close()
1397		gzr, err := gzip.NewReader(f)
1398		if err != nil {
1399			return fmt.Errorf("could not create gzip reader: %w", err)
1400		}
1401		tr := tar.NewReader(gzr)
1402		for {
1403			hdr, err := tr.Next()
1404			if err == io.EOF {
1405				break
1406			}
1407			if err != nil {
1408				return fmt.Errorf("error reading tar: %w", err)
1409			}
1410			name := filepath.Base(hdr.Name)
1411			if name == "matcha" || strings.Contains(strings.ToLower(name), "matcha") && (hdr.Typeflag == tar.TypeReg) {
1412				// write out the file
1413				binPath = filepath.Join(tmpDir, "matcha")
1414				out, err := os.Create(binPath)
1415				if err != nil {
1416					return fmt.Errorf("could not create binary file: %w", err)
1417				}
1418				if _, err := io.Copy(out, tr); err != nil {
1419					out.Close()
1420					return fmt.Errorf("could not extract binary: %w", err)
1421				}
1422				out.Close()
1423				if err := os.Chmod(binPath, 0755); err != nil {
1424					return fmt.Errorf("could not make binary executable: %w", err)
1425				}
1426				break
1427			}
1428		}
1429	} else {
1430		// For non-archive assets, assume the asset is the binary itself.
1431		binPath = assetPath
1432		if err := os.Chmod(binPath, 0755); err != nil {
1433			// ignore chmod errors but warn
1434			fmt.Printf("warning: could not chmod downloaded binary: %v\n", err)
1435		}
1436	}
1437
1438	if binPath == "" {
1439		return fmt.Errorf("could not locate matcha binary inside the release artifact")
1440	}
1441
1442	// Replace the running executable with the new binary
1443	execPath, err := os.Executable()
1444	if err != nil {
1445		return fmt.Errorf("could not determine executable path: %w", err)
1446	}
1447
1448	// Write the new binary to a temp file in same dir, then rename for atomic replacement.
1449	execDir := filepath.Dir(execPath)
1450	tmpNew := filepath.Join(execDir, fmt.Sprintf("matcha.new.%d", time.Now().Unix()))
1451	in, err := os.Open(binPath)
1452	if err != nil {
1453		return fmt.Errorf("could not open new binary: %w", err)
1454	}
1455	out, err := os.OpenFile(tmpNew, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0755)
1456	if err != nil {
1457		in.Close()
1458		return fmt.Errorf("could not create temp binary in target dir: %w", err)
1459	}
1460	if _, err := io.Copy(out, in); err != nil {
1461		in.Close()
1462		out.Close()
1463		return fmt.Errorf("could not write new binary to disk: %w", err)
1464	}
1465	in.Close()
1466	out.Close()
1467
1468	// Attempt to atomically replace
1469	if err := os.Rename(tmpNew, execPath); err != nil {
1470		return fmt.Errorf("could not replace executable: %w", err)
1471	}
1472
1473	fmt.Println("Successfully updated matcha to", latestTag)
1474	return nil
1475}
1476
1477func main() {
1478	// If invoked as CLI update command, run updater and exit.
1479	if len(os.Args) > 1 && os.Args[1] == "update" {
1480		if err := runUpdateCLI(); err != nil {
1481			fmt.Fprintf(os.Stderr, "update failed: %v\n", err)
1482			os.Exit(1)
1483		}
1484		os.Exit(0)
1485	}
1486
1487	cfg, err := config.LoadConfig()
1488	var initialModel *mainModel
1489	if err != nil {
1490		initialModel = newInitialModel(nil)
1491	} else {
1492		initialModel = newInitialModel(cfg)
1493	}
1494
1495	p := tea.NewProgram(initialModel, tea.WithAltScreen())
1496
1497	if _, err := p.Run(); err != nil {
1498		fmt.Printf("Alas, there's been an error: %v", err)
1499		os.Exit(1)
1500	}
1501}