import type { PluginOption } from 'vite';
import * as fs from 'node:fs';

import path from 'node:path';
import * as process from 'node:process';
import normallize from 'normalize-path';

// export const defaultPagesRE = /src[/\\]pages(.*)[/\\](.*)[/\\](.*)\.vue$/;
export const defaultPagesRE = /src[/\\]pages([^/\\]*)[/\\]([^/\\]*)[/\\](.*)\.vue$/;

export interface Options {
  pagesRE: RegExp
  name: string
  configPath: string
  pluginName: string
  DEBUG: boolean
}

export default function (options: Partial<Options> = {}) {
  const {
    pagesRE = defaultPagesRE,
    name = './src/layout/AppProvider.vue',
    pluginName = 'AppProvider',
    // DEBUG = process.env.DEBUG,
  } = options;

  const template = fs.readFileSync(normalizePagePathFromBase(name), 'utf-8');

  return <PluginOption>{
    name: pluginName,
    enforce: 'pre',
    transform(code, id) {
      id = normalizePagePathFromBase(id);
      const regResult = pagesRE.exec(id);
      if (regResult && (regResult[2] === regResult[3] || regResult[3] === 'index')) {
        const oldTempleate = /<template>([\s\S]*)<\/template>/.exec(code);
        const tmp_string = oldTempleate != null ? oldTempleate[1] : '';
        const newTemplate = template.replace('<!-- template -->', tmp_string as string);
        code = code.replace(/<template>([\s\S]*)<\/template>/, newTemplate);
      }
      return { code, map: null };
    },
  };

  function normalizePagePathFromBase(file: string) {
    return normallize(path.relative(process.cwd(), file));
  }

  // function debug(...args) {
  //   DEBUG &&
  //     console.log(
  //       c.dim(new Date().toLocaleTimeString()),
  //       c.bold(c.red(`[debug:${pluginName}]`)),
  //       ...args,
  //     )
  // }
}