import fs from "fs"
import path from "path"
import { ColorScheme, Meta } from "./themes/common/colorScheme"

const colorSchemes: ColorScheme[] = []
export default colorSchemes

const schemeMeta: Meta[] = []
export { schemeMeta }

const staffColorSchemes: ColorScheme[] = []
export { staffColorSchemes }

const experimentalColorSchemes: ColorScheme[] = []
export { experimentalColorSchemes }

const themes_directory = path.resolve(`${__dirname}/themes`)

function for_all_color_schemes_in(
    themesPath: string,
    callback: (module: any, path: string) => void
) {
    for (const fileName of fs.readdirSync(themesPath)) {
        if (fileName == "template.ts") continue
        const filePath = path.join(themesPath, fileName)

        if (fs.statSync(filePath).isFile()) {
            const colorScheme = require(filePath)
            callback(colorScheme, path.basename(filePath))
        }
    }
}

function fillColorSchemes(themesPath: string, colorSchemes: ColorScheme[]) {
    for_all_color_schemes_in(themesPath, (colorScheme, _path) => {
        if (colorScheme.dark) colorSchemes.push(colorScheme.dark)
        if (colorScheme.light) colorSchemes.push(colorScheme.light)
    })
}

fillColorSchemes(themes_directory, colorSchemes)
fillColorSchemes(path.resolve(`${themes_directory}/staff`), staffColorSchemes)

function fillMeta(themesPath: string, meta: Meta[]) {
    for_all_color_schemes_in(themesPath, (colorScheme, path) => {
        if (colorScheme.meta) {
            meta.push(colorScheme.meta)
        } else {
            throw Error(`Public theme ${path} must have a meta field`)
        }
    })
}

fillMeta(themes_directory, schemeMeta)