import {
  Plugin,
  EventListener,
  Configurable,
} from '@squeebot/core/lib/plugin';

import { logger } from '@squeebot/core/lib/core';
import { IMessage } from '@squeebot/core/lib/types';
import { fullIDMatcher } from '@squeebot/core/lib/common';

/*
  users: {
    'service/instance/name': [
      'one',
      'two',
      '*'
    ]
  },
  rooms: {
    'service/instance/room': {
      'service/instance/name': [
        'three',
        'four',
      ]
    }
  }
*/

@Configurable({users: {}, rooms: {}})
class PermissionsPlugin extends Plugin {
  userPermitted(msg: IMessage, required: string[]): boolean {
    // Boot all guests instantly
    if (msg.guest === true) {
      return false;
    }

    const userFull = msg.fullSenderID;
    const roomFull = msg.fullRoomID;
    if (!userFull || !roomFull) {
      return false;
    }

    // Check for room access
    for (const ch in this.config.config.rooms) {
      if (fullIDMatcher(roomFull, ch)) {
        const users = this.config.config.rooms[ch];
        for (const user in users) {
          if (fullIDMatcher(userFull, user)) {
            const perms = users[user];
            if (perms.indexOf('*') !== -1) {
              return true;
            }

            let has = false;
            for (const perm of required) {
              if (perm === '*') {
                has = true;
                break;
              }

              if (perms.indexOf(perm) !== -1) {
                has = true;
                break;
              }
            }

            if (has) {
              return true;
            }
          }
        }
      }
    }

    // Check for per-user-basis permissions
    for (const user in this.config.config.users) {
      if (fullIDMatcher(userFull, user)) {
        const perms = this.config.config.users[user];
        if (perms.indexOf('*') !== -1) {
          return true;
        }

        let has = false;
        for (const perm of required) {
          if (perm === '*') {
            has = true;
            break;
          }

          if (perms.indexOf(perm) !== -1) {
            has = true;
            break;
          }
        }

        if (has) {
          return true;
        }
      }
    }

    return false;
  }

  @EventListener('pluginUnload')
  unloadEventHandler(plugin: string | Plugin): void {
    if (plugin === this.name || plugin === this) {
      logger.debug('[%s]', this.name, 'shutting down..');
      this.config.save().then(() =>
        this.emit('pluginUnloaded', this));
    }
  }
}

module.exports = PermissionsPlugin;