import typescript from '@rollup/plugin-typescript'
import commonjs from '@rollup/plugin-commonjs'
import { nodeResolve } from '@rollup/plugin-node-resolve'
import terser from '@rollup/plugin-terser'
import dts from 'rollup-plugin-dts'

import html from '@rollup/plugin-html'
import livereload from 'rollup-plugin-livereload'
import serve from 'rollup-plugin-serve'


// config

const basePath = '.'
const globalName = 'LeaferX.ruler' // <script /> 插件的全局变量名
const supportPlatforms = ['web', 'worker', 'node', 'miniapp']
const external = { '@leafer-ui/core': 'LeaferUI', '@leafer-ui/interface': 'LeaferUI', '@leafer-in/editor': 'LeaferUI' } // 声明外部依赖，不打进插件包，只引用

const port = 12121 // visit http://localhost:12121

// ------


const isDev = process.env.NODE_ENV === 'development'
const platformName = process.env.PLATFORM

const platform = {
  'all': {
    name: 'index', // output index.esm.js index.js
    path: basePath,
    withFormat: supportPlatforms.includes('node') ? ['cjs'] : false,
    withGlobal: globalName,
    withMin: 'min',
    external
  }
}

const plugins = [
  nodeResolve({
    browser: true,
    preferBuiltins: false
  }),
  typescript({
    tsconfig: './tsconfig.json'
  }),
  commonjs()
]


let config


if (isDev) {

  config = {
    input: 'main.ts',
    output: {
      file: 'dev/bundle.js',
      format: 'esm'
    },
    watch: { exclude: ['node_modules/**'] },
    plugins: [
      ...plugins,
      html({
        title: 'Leafer Plugin',
        meta: [{ charset: 'utf-8' }, {
          name: 'viewport',
          content: 'width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no'
        }]
      }),
      livereload(),
      serve({ contentBase: ['dev/'], port })
    ]
  }

} else {

  // build

  config = [{ // types/index.d.ts
    input: basePath + '/src/index.ts',
    output: {
      file: basePath + '/types/index.d.ts'
    },
    plugins: [dts()]
  }]

  let p = platform[platformName]
  if (!(p instanceof Array)) p = [p]

  const list = []

  p.forEach(c => {

    if (c.input && c.output) {

      list.push(c)

    } else {

      const input = c.input || c.path + '/src/index.ts'
      const fileBase = c.path + '/dist/' + (c.name || platformName)

      const global = c.withGlobal
      const min = c.withMin
      let external = c.external

      list.push({ external, input, output: fileBase + '.esm.js' })
      if (c.withMin) list.push({ min, external, input, output: fileBase + '.esm.' + min + '.js' })

      if (c.withFormat) {
        c.withFormat.forEach(format => {
          const cjs = format === 'cjs'
          list.push({ external, input, output: fileBase + (cjs ? '.cjs' : '.' + format + '.js'), format })
          if (c.withMin) list.push({
            min,
            external,
            input,
            output: fileBase + (cjs ? '.' + min + '.cjs' : '.' + format + '.' + min + '.js'),
            format
          })
        })
      }

      if (global) {
        if (c.fullGlobal) external = null
        list.push({ global, external, input, output: fileBase + '.js' })
        if (c.withMin) list.push({ global, min, external, input, output: fileBase + '.' + min + '.js' })
      }

    }
  })

  list.forEach(c => {
    const item = {
      external: c.external ? Object.keys(c.external) : null,
      input: c.input,
      plugins: [...plugins]
    }

    if (c.global) {

      item.output = {
        file: c.output,
        name: c.global,
        format: c.format || 'iife'
      }

      if (c.external) item.output.globals = c.external

    } else {

      item.output = {
        file: c.output,
        format: c.format || 'esm'
      }

    }

    if (c.min) item.plugins.push(terser({ format: { comments: false } }))

    config.push(item)

  })

}

export default config