import fs from 'node:fs'
import tailwind from '@tailwindcss/postcss'
import autoprefixer from 'autoprefixer'
import cssnano from 'cssnano'
import * as esbuild from 'esbuild'
import postcss from 'postcss'
import * as sass from 'sass'

import twPropsUnconditional from '../postcss/plugins/tw-properties-unconditional.mjs'

// Convert rem to px to avoid font-size inheritance issue
// issue 1: baidu.com - html: {font-size: 100px}
const remToPxPlugin = () => ({
  postcssPlugin: 'rem-to-px',
  Declaration(decl) {
    if (decl.value.includes('rem')) {
      decl.value = decl.value.replaceAll(
        /(-?[\d.]+)rem/g,
        (_, p1) => `${Number.parseFloat(p1) * 16}px`
      )
    }
  },
})
remToPxPlugin.postcss = true

const EMOJI_LIST = [
  //
  '⚽️',
  '🏀',
  '🏈',
  '⚾️',
  '🥎',
  '🎾',
  '🏐',
  '🏉',
  '🥏',
  '🎱',
]

function getRandomInt(max) {
  return Math.floor(Math.random() * max)
}

export const logger = (target, emoji) => {
  emoji = emoji || EMOJI_LIST[getRandomInt(EMOJI_LIST.length)]
  return (message) => {
    console.log(`${emoji} [target: ${target}]`, message)
  }
}

const schemeImportPlugin = ({ compressCss }) => ({
  name: 'schemeImport',
  setup(build) {
    build.onResolve({ filter: /^[\w-]+:/ }, async (args) => {
      const result = await build.resolve(args.path.split(':')[1], {
        kind: 'import-statement',
        resolveDir: args.resolveDir,
      })
      if (result.errors.length > 0) {
        return { errors: result.errors }
      }

      return { path: result.path, namespace: 'schemeImport-ns' }
    })
    build.onLoad(
      { filter: /\.(s[ac]ss|css)$/, namespace: 'schemeImport-ns' },
      async (args) => {
        let cssText = ''
        if (/\.s[ac]ss$/i.test(args.path)) {
          const result = (await sass.compileAsync(args.path, {
            style: compressCss ? 'compressed' : 'expanded',
          })) || { css: '' }
          cssText = result.css
        } else {
          cssText = await fs.promises.readFile(args.path, 'utf8')
        }

        let pkgDir
        const m = /(.+\/src\/(packages|common)\/[^/]+)/.exec(args.path)
        if (m) pkgDir = m[1]

        const plugins = [
          tailwind({
            base: pkgDir,
          }),
          remToPxPlugin(),
          twPropsUnconditional(),
          autoprefixer(),
        ]
        if (compressCss) {
          plugins.push(cssnano())
        }

        const postcssResult = await postcss(plugins).process(cssText, {
          from: args.path,
        })

        return {
          contents: postcssResult.css,
          loader: 'text',
        }
      }
    )
    build.onLoad(
      { filter: /.*/, namespace: 'schemeImport-ns' },
      async (args) => ({
        contents: await fs.promises.readFile(args.path),
        loader: 'text',
      })
    )
  },
})

export const getBuildOptions = (target, tag, fileName = 'content') => ({
  entryPoints: [`src/${fileName}.ts`],
  bundle: true,
  plugins: [
    schemeImportPlugin({ compressCss: tag === 'prod' || tag === 'staging' }),
  ],
  define: {
    'process.env.PLASMO_TARGET': `"${target}"`,
    'process.env.PLASMO_TAG': `"${tag}"`,
  },
  target: ['chrome58', 'firefox57', 'safari11', 'edge18'],
  outfile: `build/${target}-${tag}/${fileName}.js`,
})

const waitUntilFileExists = async (path, timeout = 10_000) =>
  new Promise((resolve, reject) => {
    const timeoutId = setTimeout(() => {
      reject(new Error('File does not exits. ' + path))
    }, timeout)

    const check = () => {
      if (fs.existsSync(path)) {
        clearTimeout(timeoutId)
        resolve()
        return
      }

      setTimeout(check, 100)
    }

    check()
  })

export const runDevServer = async (buildOptions, target, tag) => {
  const log = logger(target)
  const ctx = await esbuild.context(buildOptions)

  await ctx.watch()
  log('watching...')

  await waitUntilFileExists(buildOptions.outfile)

  const { host, port } = await ctx.serve({
    servedir: `build/${target}-${tag}`,
  })
  log(`Server is running at http://localhost:${port}/`)
  log('Hit CTRL-C to stop the server')

  return { host, port }
}