import { database } from '../database/index.js';
import { Proxy, ProxyOptions } from '../types/index.js';
import logger from '../utils/logger.js';

export class ProxyModel {
  static async findAll(): Promise<Proxy[]> {
    try {
      const db = database.getDb();
      const stmt = db.prepare('SELECT * FROM proxies ORDER BY created_at DESC');
      const rows = stmt.all() as any[];
      
      const proxies = rows.map(row => ({
        ...row,
        options: JSON.parse(row.options)
      }));
      return proxies;
    } catch (error) {
      logger.error('Error fetching all proxies:', error);
      throw error;
    }
  }

  static async findById(id: number): Promise<Proxy | null> {
    try {
      const db = database.getDb();
      const stmt = db.prepare('SELECT * FROM proxies WHERE id = ?');
      const row = stmt.get(id) as any;
      
      if (row) {
        row.options = JSON.parse(row.options);
      }
      return row || null;
    } catch (error) {
      logger.error('Error finding proxy by ID:', error);
      throw error;
    }
  }

  static async findByDomain(domain: string): Promise<Proxy | null> {
    try {
      const db = database.getDb();
      const stmt = db.prepare('SELECT * FROM proxies WHERE domain = ?');
      const row = stmt.get(domain) as any;
      
      if (row) {
        row.options = JSON.parse(row.options);
      }
      return row || null;
    } catch (error) {
      logger.error('Error finding proxy by domain:', error);
      throw error;
    }
  }

  static async create(proxyData: Omit<Proxy, 'id' | 'created_at' | 'updated_at'>): Promise<Proxy> {
    try {
      const db = database.getDb();
      const optionsJson = JSON.stringify(proxyData.options);
      
      const stmt = db.prepare(`
        INSERT INTO proxies (domain, target, ssl_type, cert_path, key_path, options) 
        VALUES (?, ?, ?, ?, ?, ?) RETURNING *
      `);
      
      const result = stmt.get(
        proxyData.domain,
        proxyData.target,
        proxyData.ssl_type,
        proxyData.cert_path || null,
        proxyData.key_path || null,
        optionsJson
      ) as any;
      
      result.options = JSON.parse(result.options);
      return result;
    } catch (error) {
      logger.error('Error creating proxy:', error);
      throw error;
    }
  }

  static async update(id: number, proxyData: Partial<Proxy>): Promise<Proxy | null> {
    try {
      const db = database.getDb();
      const fields: string[] = [];
      const values: any[] = [];

      if (proxyData.domain !== undefined) {
        fields.push('domain = ?');
        values.push(proxyData.domain);
      }
      if (proxyData.target !== undefined) {
        fields.push('target = ?');
        values.push(proxyData.target);
      }
      if (proxyData.ssl_type !== undefined) {
        fields.push('ssl_type = ?');
        values.push(proxyData.ssl_type);
      }
      if (proxyData.cert_path !== undefined) {
        fields.push('cert_path = ?');
        values.push(proxyData.cert_path);
      }
      if (proxyData.key_path !== undefined) {
        fields.push('key_path = ?');
        values.push(proxyData.key_path);
      }
      if (proxyData.options !== undefined) {
        fields.push('options = ?');
        values.push(JSON.stringify(proxyData.options));
      }

      if (fields.length === 0) {
        return null;
      }

      fields.push('updated_at = CURRENT_TIMESTAMP');
      values.push(id);

      const stmt = db.prepare(`UPDATE proxies SET ${fields.join(', ')} WHERE id = ?`);
      const result = stmt.run(...values);
      
      if (result.changes === 0) {
        return null;
      }
      
      return ProxyModel.findById(id);
    } catch (error) {
      logger.error('Error updating proxy:', error);
      throw error;
    }
  }

  static async delete(id: number): Promise<boolean> {
    try {
      const db = database.getDb();
      const stmt = db.prepare('DELETE FROM proxies WHERE id = ?');
      const result = stmt.run(id);
      return result.changes > 0;
    } catch (error) {
      logger.error('Error deleting proxy:', error);
      throw error;
    }
  }
}