import { Config } from '../models/model.ts';
import { CustomError } from '@kevisual/router';
import { redis, db, schema } from '@/app.ts';
import { eq, and } from 'drizzle-orm';
import { UserPermission, UserPermissionOptions } from '@kevisual/permission';

export class ShareConfigService {
  /**
   * 获取分享的配置
   * @param key 配置的key
   * @param username 分享者的username
   * @returns 配置
   */
  static async getShareConfig(key: string, username: string, options: UserPermissionOptions) {
    const shareCacheConfigString = await redis.get(`config:share:${username}:${key}`);
    let shareCacheConfig: Config;
    try {
      shareCacheConfig = JSON.parse(shareCacheConfigString);
    } catch (e) {
      await redis.set(`config:share:${username}:${key}`, '', 'EX', 0); // 删除缓存
      throw new CustomError(400, { message: 'config parse error' });
    }
    const owner = username;
    if (shareCacheConfig) {
      const permission = new UserPermission({ permission: (shareCacheConfig?.data as any)?.permission, owner });
      const result = permission.checkPermissionSuccess(options);
      if (!result.success) {
        throw new CustomError(403, { message: 'no permission' });
      }
      return shareCacheConfig;
    }
    const users = await db.select()
      .from(schema.cfUser)
      .where(eq(schema.cfUser.username, username))
      .limit(1);
    const user = users[0];
    if (!user) {
      throw new CustomError(404, { message: 'user not found' });
    }
    const configs = await db.select()
      .from(schema.kvConfig)
      .where(and(eq(schema.kvConfig.key, key), eq(schema.kvConfig.uid, user.id)))
      .limit(1);
    const config = configs[0];
    if (!config) {
      throw new CustomError(404, { message: 'config not found' });
    }
    const permission = new UserPermission({ permission: (config?.data as any)?.permission, owner });
    const result = permission.checkPermissionSuccess(options);
    if (!result.success) {
      throw new CustomError(403, { message: 'no permission' });
    }
    await redis.set(`config:share:${username}:${key}`, JSON.stringify(config), 'EX', 60 * 60 * 24 * 7); // 7天
    return config;
  }
  static async expireShareConfig(key: string, username: string) {
    if (key && username) {
      await redis.set(`config:share:${username}:${key}`, '', 'EX', 1);
    }
  }
}