/**
 * The MIT License (MIT)
 *
 * Copyright (c) 2023 Daishi Kato
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 **/

import { extname } from 'node:path'
import * as swc from '@swc/core'
import type { Plugin } from 'vite'

// PLAN
// see if we can use react server dom for the bridge between 'use dom' and native
// https://github.com/dai-shi/waku/blob/82dea924457fba1c60a9dfb071cb69dc44d7bbf2/packages/waku/src/lib/plugins/vite-plugin-rsc-transform.ts#L143

export function useDOMPlugin(): Plugin {
  return {
    name: 'one-vite-dom-plugin',

    async transform(code, id, options) {
      if (!code.includes('use dom')) {
        return
      }

      const ext = extname(id)
      const mod = swc.parseSync(code, parseOpts(ext))

      let hasUseDom = false

      for (let i = 0; i < mod.body.length; ++i) {
        const item = mod.body[i]!
        if (item.type === 'ExpressionStatement') {
          if (item.expression.type === 'StringLiteral') {
            if (item.expression.value === 'use dom') {
              hasUseDom = true
              break
            }
          }
        } else {
          // HACK we can't stop the loop here, because vite may put some import statements before the directives
          // break;
        }
      }

      if (!hasUseDom) {
        return
      }

      // does have use dom - lets transform
    },
  }
}

const parseOpts = (ext: string) => {
  if (ext === '.ts' || ext === '.tsx') {
    return {
      syntax: 'typescript',
      tsx: ext.endsWith('x'),
    } as const
  }
  // We hoped to use 'typescript' for everything, but it fails in some cases.
  // https://github.com/dai-shi/waku/issues/677
  return {
    syntax: 'ecmascript',
    jsx: ext.endsWith('x'),
  } as const
}