import { Plugin, PluginManager } from '@nocobase/server';
import fs from 'fs';
import send from 'koa-send';
import serve from 'koa-static';
import isEmpty from 'lodash/isEmpty';
import { isAbsolute, resolve } from 'path';
import { getAntdLocale } from './antd';
import { getCronLocale } from './cron';
import { getCronstrueLocale } from './cronstrue';
import { getMomentLocale } from './moment-locale';
import { getResourceLocale } from './resource';

async function getReadMe(name: string, locale: string) {
  const packageName = PluginManager.getPackageName(name);
  const dir = resolve(process.cwd(), 'node_modules', packageName);
  const files = [resolve(dir, `README.${locale}.md`), resolve(dir, `README.md`)];
  const file = files.find((file) => {
    return fs.existsSync(file);
  });
  return file ? (await fs.promises.readFile(file)).toString() : '';
}

async function getTabs(name: string, locale: string) {
  const packageName = PluginManager.getPackageName(name);
  const dir = resolve(process.cwd(), 'node_modules', packageName);
  const file = resolve(dir, 'docs', locale, 'tabs.json');
  if (!fs.existsSync(file)) {
    // TODO: compatible README, remove it in all plugin has tabs.json
    return [
      {
        title: 'README',
        path: '__README__',
      },
    ];
  }
  return JSON.parse((await fs.promises.readFile(file)).toString());
}

interface TabInfoParams {
  filterByTk: string;
  path: string;
  locale: string;
}

async function getTabInfo({ filterByTk, path, locale }: TabInfoParams) {
  const packageName = PluginManager.getPackageName(filterByTk);
  const dir = resolve(process.cwd(), 'node_modules', packageName);
  if (path === '__README__') {
    return await getReadMe(filterByTk, locale);
  }
  const files = [
    resolve(dir, 'docs', locale, `${path}.md`),
    // default
    resolve(dir, 'docs', 'en-US', `${path}.md`),
    resolve(dir, 'docs', 'zh-CN', `${path}.md`),
  ];
  const file = files.find((file) => {
    return fs.existsSync(file);
  });
  return file ? (await fs.promises.readFile(file)).toString() : '';
}

async function getLang(ctx) {
  const SystemSetting = ctx.db.getRepository('systemSettings');
  const systemSetting = await SystemSetting.findOne();
  const enabledLanguages: string[] = systemSetting.get('enabledLanguages') || [];
  const currentUser = ctx.state.currentUser;
  let lang = enabledLanguages?.[0] || process.env.APP_LANG || 'en-US';
  if (enabledLanguages.includes(currentUser?.appLang)) {
    lang = currentUser?.appLang;
  }
  if (ctx.request.query.locale) {
    lang = ctx.request.query.locale;
  }
  return lang;
}

export class ClientPlugin extends Plugin {
  async beforeLoad() {
    // const cmd = this.app.findCommand('install');
    // if (cmd) {
    //   cmd.option('--import-demo');
    // }
    this.app.on('afterInstall', async (app, options) => {
      const [opts] = options?.cliArgs || [{}];
      if (opts?.importDemo) {
        //
      }
    });

    this.db.on('systemSettings.beforeCreate', async (instance, { transaction }) => {
      const uiSchemas = this.db.getRepository<any>('uiSchemas');
      const schema = await uiSchemas.insert(
        {
          type: 'void',
          'x-component': 'Menu',
          'x-designer': 'Menu.Designer',
          'x-initializer': 'MenuItemInitializers',
          'x-component-props': {
            mode: 'mix',
            theme: 'dark',
            // defaultSelectedUid: 'u8',
            onSelect: '{{ onSelect }}',
            sideMenuRefScopeKey: 'sideMenuRef',
          },
          properties: {},
        },
        { transaction },
      );
      instance.set('options.adminSchemaUid', schema['x-uid']);
    });
  }

  async load() {
    this.db.addMigrations({
      namespace: 'client',
      directory: resolve(__dirname, './migrations'),
      context: {
        plugin: this,
      },
    });
    this.app.acl.allow('app', 'getLang');
    this.app.acl.allow('app', 'getInfo');
    this.app.acl.allow('app', 'getPlugins');
    this.app.acl.allow('plugins', '*', 'public');
    this.app.acl.registerSnippet({
      name: 'app',
      actions: ['app:reboot', 'app:clearCache'],
    });
    const dialect = this.app.db.sequelize.getDialect();
    const locales = require('./locale').default;
    const restartMark = resolve(process.cwd(), 'storage', 'restart');
    this.app.on('beforeStart', async () => {
      if (fs.existsSync(restartMark)) {
        fs.unlinkSync(restartMark);
      }
    });
    this.app.resource({
      name: 'app',
      actions: {
        async getInfo(ctx, next) {
          const SystemSetting = ctx.db.getRepository('systemSettings');
          const systemSetting = await SystemSetting.findOne();
          const enabledLanguages: string[] = systemSetting.get('enabledLanguages') || [];
          const currentUser = ctx.state.currentUser;
          let lang = enabledLanguages?.[0] || process.env.APP_LANG || 'en-US';
          if (enabledLanguages.includes(currentUser?.appLang)) {
            lang = currentUser?.appLang;
          }
          ctx.body = {
            database: {
              dialect,
            },
            version: await ctx.app.version.get(),
            lang,
            theme: currentUser?.systemSettings?.theme || systemSetting?.options?.theme || 'default',
          };
          await next();
        },
        async getLang(ctx, next) {
          const lang = await getLang(ctx);
          if (isEmpty(locales[lang])) {
            locales[lang] = {};
          }
          if (isEmpty(locales[lang].resources)) {
            locales[lang].resources = await getResourceLocale(lang, ctx.db);
          }
          if (isEmpty(locales[lang].antd)) {
            locales[lang].antd = getAntdLocale(lang);
          }
          if (isEmpty(locales[lang].cronstrue)) {
            locales[lang].cronstrue = getCronstrueLocale(lang);
          }
          if (isEmpty(locales[lang].cron)) {
            locales[lang].cron = getCronLocale(lang);
          }
          ctx.body = {
            lang,
            moment: getMomentLocale(lang),
            ...locales[lang],
          };
          await next();
        },
        async getPlugins(ctx, next) {
          const pm = ctx.db.getRepository('applicationPlugins');
          const items = await pm.find({
            filter: {
              enabled: true,
            },
          });
          ctx.body = items
            .filter((item) => {
              try {
                const packageName = PluginManager.getPackageName(item.name);
                require.resolve(`${packageName}/client`);
                return true;
              } catch (error) {}
              return false;
            })
            .map((item) => item.name);
          await next();
        },
        async clearCache(ctx, next) {
          await ctx.cache.reset();
          await next();
        },
        reboot(ctx) {
          const RESTART_CODE = 100;
          process.on('exit', (code) => {
            if (code === RESTART_CODE && process.env.APP_ENV === 'production') {
              fs.writeFileSync(restartMark, '1');
              console.log('Restart mark created.');
            }
          });
          ctx.app.on('afterStop', () => {
            // Exit with code 100 will restart the process
            process.exit(RESTART_CODE);
          });
          ctx.app.stop();
        },
      },
    });
    this.app.resource({
      name: 'plugins',
      actions: {
        async getInfo(ctx, next) {
          const lang = await getLang(ctx);
          const { filterByTk } = ctx.action.params;
          ctx.body = {
            filterByTk,
            readMe: await getReadMe(filterByTk, lang),
          };
          await next();
        },
        async getTabs(ctx, next) {
          const lang = await getLang(ctx);
          const { filterByTk } = ctx.action.params;
          ctx.body = {
            filterByTk,
            tabs: await getTabs(filterByTk, lang),
          };
          await next();
        },
        async getTabInfo(ctx, next) {
          const locale = await getLang(ctx);
          const { filterByTk } = ctx.action.params;
          ctx.body = {
            filterByTk,
            content: await getTabInfo({ ...(ctx.action.params as any), locale }),
          };
          await next();
        },
      },
    });
    let root = this.options.dist || `./packages/app/client/dist`;
    if (!isAbsolute(root)) {
      root = resolve(process.cwd(), root);
    }
    if (process.env.APP_ENV !== 'production' && root) {
      this.app.use(
        async (ctx, next) => {
          if (ctx.path.startsWith(this.app.resourcer.options.prefix)) {
            return next();
          }
          await serve(root)(ctx, next);
          // console.log('koa-send', root, ctx.status);
          if (ctx.status == 404) {
            return send(ctx, 'index.html', { root });
          }
        },
        { tag: 'clientStatic', before: 'cors' },
      );
    }
  }
}

export default ClientPlugin;