import { build } from 'esbuild'
import {
    lstatSync,
    readdirSync,
    readFileSync,
    unlinkSync,
    writeFileSync,
} from 'fs'

const BaseUrl = `https://git.zomo.dev/zomo/browser-scripts/`
const FileUrl = name =>
    `https://git.zomo.dev/zomo/browser-scripts/raw/branch/main/dist/${name}.zomo.js`

function isValueNotEmpty(val) {
    return (
        val !== '' &&
        val !== false &&
        val !== [] &&
        val !== undefined &&
        val !== null
    )
}
function padr(str, len) {
    return str + ' '.repeat(len - str.length)
}

function MetadataArgs(name) {
    var meta = {
        name: name,
        namespace: 'zomo.dev',
        match: '',
        excludematch: '',
        version: '0.0.0',
        description: '',
        icon: '',
        require: '',
        resource: '',
        runat: '',
        noframes: false,
        grant: '',
        injectinto: '',
        downloadURL: FileUrl(name),
        supportURL: BaseUrl,
        homepageURL: BaseUrl,
        unwrap: false,
    }

    try {
        let args = JSON.parse(
            readFileSync(`scripts/${name}/meta.json`).toString()
        )
        for (let key in meta) {
            if (isValueNotEmpty(args[key])) {
                meta[key] = args[key]
            }
        }
    } catch (e) {
        console.log(e)
        console.log(
            `scripts/${name}/meta.json not found, using default metadata`
        )
    }

    const keyConversion = {
        injectinto: 'inject-into',
        excludematch: 'exclude-match',
    }

    return `// ==UserScript==
${Object.keys(meta)
    .filter(key => isValueNotEmpty(meta[key]))
    .map(key => {
        let val = meta[key],
            key_str = padr(key in keyConversion ? keyConversion[key] : key, 12)
        if (typeof val === 'boolean') {
            if (val) return `// @${key_str}`
        } else if (typeof val === 'string') {
            return `// @${key_str} ${val}`
        } else if (Array.isArray(val)) {
            return val.map(v => `// @${key_str} ${v}`).join('\n')
        }
        return ''
    })
    .filter(l => l.length)
    .join('\n')}
// ==/UserScript==
`
}

async function compileProject(name) {
    await build({
        entryPoints: [`scripts/${name}/main.ts`],
        outfile: `dist/${name}.user.js`,

        target: 'esnext',
        platform: 'node',
        format: 'cjs',

        watch: false,
        bundle: true,
        minify: false,
        sourcemap: false,

        define: {
            UserScriptProjectName: `'${name}'`,
            UserScriptFileUrl: `'${FileUrl(name)}'`,
        },
    })

    //add UserScript header
    let meta = MetadataArgs(name)
    let content = readFileSync(`dist/${name}.user.js`).toString()

    writeFileSync(`dist/${name}.user.js`, meta + content)
}

//delete compiled scripts
readdirSync('dist').forEach(file => unlinkSync(`dist/${file}`))

//compile scripts
readdirSync('scripts').forEach(name => {
    if (
        lstatSync(`scripts/${name}`).isDirectory() &&
        lstatSync(`scripts/${name}/main.ts`).isFile()
    ) {
        compileProject(name)
    }
})