import Database from "better-sqlite3";
import path from "path";

const dbPath = path.join(process.cwd(), "database", "ollahub.db");
const db = new Database(dbPath);

export class MCPRepository {
  /**
   * Verificar se um MCP está instalado localmente
   */
  static isInstalled(mcpId: string): boolean {
    try {
      const stmt = db.prepare("SELECT id FROM mcp_installations WHERE id = ?");
      const result = stmt.get(mcpId);
      return !!result;
    } catch (error) {
      console.error(`Error checking if MCP ${mcpId} is installed:`, error);
      return false;
    }
  }

  /**
   * Salvar instalação de MCP no banco local
   */
  static saveInstallation(mcpId: string, config: any, tools: any[]): void {
    try {
      // Tentar extrair owner/repo do ID
      let owner: string;
      let repo: string;

      if (mcpId.includes("/")) {
        const parts = mcpId.split("/");
        owner = parts[0];
        repo = parts.slice(1).join("/"); // Suportar múltiplas barras
      } else {
        // Se não tem /, usar mcpId como repo e extrair owner do config se disponível
        owner = config.owner || config.author || "unknown";
        repo = mcpId;
      }

      const stmt = db.prepare(`
        INSERT OR REPLACE INTO mcp_installations 
        (id, owner, repo, name, config, tools, installed_at, updated_at)
        VALUES (?, ?, ?, ?, ?, ?, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
      `);

      stmt.run(
        mcpId,
        owner,
        repo,
        config.name || repo,
        JSON.stringify(config),
        JSON.stringify(tools)
      );

      console.log(`MCP ${mcpId} saved to local database`);
    } catch (error) {
      console.error(`Error saving MCP ${mcpId} installation:`, error);
      throw error;
    }
  }

  /**
   * Remover instalação de MCP do banco local
   */
  static removeInstallation(mcpId: string): void {
    try {
      const stmt = db.prepare("DELETE FROM mcp_installations WHERE id = ?");
      const result = stmt.run(mcpId);

      if (result.changes > 0) {
        console.log(`MCP ${mcpId} removed from local database`);
      } else {
        console.log(`MCP ${mcpId} was not found in local database`);
      }
    } catch (error) {
      console.error(`Error removing MCP ${mcpId} installation:`, error);
      throw error;
    }
  }

  /**
   * Listar todos os MCPs instalados localmente
   */
  static listInstalled(): string[] {
    try {
      const stmt = db.prepare(
        "SELECT id FROM mcp_installations ORDER BY installed_at DESC"
      );
      const results = stmt.all() as { id: string }[];
      return results.map((row) => row.id);
    } catch (error) {
      console.error("Error listing installed MCPs:", error);
      return [];
    }
  }

  /**
   * Obter configuração local de um MCP
   */
  static getLocalConfig(mcpId: string): any {
    try {
      const stmt = db.prepare(
        "SELECT config FROM mcp_installations WHERE id = ?"
      );
      const result = stmt.get(mcpId) as { config: string } | undefined;

      if (result) {
        return JSON.parse(result.config);
      }
      return null;
    } catch (error) {
      console.error(`Error getting local config for MCP ${mcpId}:`, error);
      return null;
    }
  }

  /**
   * Obter ferramentas locais de um MCP
   */
  static getLocalTools(mcpId: string): any[] {
    try {
      const stmt = db.prepare(
        "SELECT tools FROM mcp_installations WHERE id = ?"
      );
      const result = stmt.get(mcpId) as { tools: string } | undefined;

      if (result) {
        return JSON.parse(result.tools);
      }
      return [];
    } catch (error) {
      console.error(`Error getting local tools for MCP ${mcpId}:`, error);
      return [];
    }
  }

  /**
   * Obter informações completas de um MCP instalado
   */
  static getInstalledMCP(mcpId: string): any {
    try {
      const stmt = db.prepare(`
        SELECT id, owner, repo, name, config, tools, installed_at, updated_at 
        FROM mcp_installations WHERE id = ?
      `);
      const result = stmt.get(mcpId) as any;

      if (result) {
        return {
          ...result,
          config: JSON.parse(result.config),
          tools: JSON.parse(result.tools),
        };
      }
      return null;
    } catch (error) {
      console.error(`Error getting installed MCP ${mcpId}:`, error);
      return null;
    }
  }

  /**
   * Listar todos os MCPs instalados com informações completas
   */
  static listInstalledWithDetails(): any[] {
    try {
      const stmt = db.prepare(`
        SELECT id, owner, repo, name, config, tools, installed_at, updated_at 
        FROM mcp_installations ORDER BY installed_at DESC
      `);
      const results = stmt.all() as any[];

      return results.map((row) => ({
        ...row,
        config: JSON.parse(row.config),
        tools: JSON.parse(row.tools),
      }));
    } catch (error) {
      console.error("Error listing installed MCPs with details:", error);
      return [];
    }
  }

  /**
   * Atualizar timestamp de um MCP instalado
   */
  static updateTimestamp(mcpId: string): void {
    try {
      const stmt = db.prepare(
        "UPDATE mcp_installations SET updated_at = CURRENT_TIMESTAMP WHERE id = ?"
      );
      stmt.run(mcpId);
    } catch (error) {
      console.error(`Error updating timestamp for MCP ${mcpId}:`, error);
    }
  }

  /**
   * Atualizar configuração de um MCP instalado
   */
  static updateConfig(mcpId: string, newConfig: any): void {
    try {
      const stmt = db.prepare(`
        UPDATE mcp_installations 
        SET config = ?, updated_at = CURRENT_TIMESTAMP 
        WHERE id = ?
      `);

      const result = stmt.run(JSON.stringify(newConfig), mcpId);

      if (result.changes > 0) {
        console.log(`MCP ${mcpId} configuration updated successfully`);
      } else {
        console.log(`MCP ${mcpId} was not found for configuration update`);
        throw new Error(`MCP ${mcpId} not found`);
      }
    } catch (error) {
      console.error(`Error updating configuration for MCP ${mcpId}:`, error);
      throw error;
    }
  }

  /**
   * Verificar integridade do banco de dados
   */
  static checkDatabaseIntegrity(): boolean {
    try {
      const result = db.prepare("PRAGMA integrity_check").get() as {
        integrity_check: string;
      };
      return result.integrity_check === "ok";
    } catch (error) {
      console.error("Error checking database integrity:", error);
      return false;
    }
  }

  /**
   * Obter estatísticas das instalações
   */
  static getInstallationStats(): any {
    try {
      const totalStmt = db.prepare(
        "SELECT COUNT(*) as total FROM mcp_installations"
      );
      const totalResult = totalStmt.get() as { total: number };

      const recentStmt = db.prepare(`
        SELECT COUNT(*) as recent 
        FROM mcp_installations 
        WHERE installed_at > datetime('now', '-7 days')
      `);
      const recentResult = recentStmt.get() as { recent: number };

      const categoriesStmt = db.prepare(`
        SELECT COUNT(DISTINCT owner) as unique_owners 
        FROM mcp_installations
      `);
      const categoriesResult = categoriesStmt.get() as {
        unique_owners: number;
      };

      return {
        total: totalResult.total,
        recent: recentResult.recent,
        uniqueOwners: categoriesResult.unique_owners,
      };
    } catch (error) {
      console.error("Error getting installation stats:", error);
      return { total: 0, recent: 0, uniqueOwners: 0 };
    }
  }

  /**
   * Atualizar status de instalação de um MCP
   */
  static updateInstallationStatus(
    mcpId: string,
    status: string,
    message?: string
  ): void {
    try {
      const stmt = db.prepare(`
        UPDATE mcp_installations 
        SET status = ?, status_message = ?, updated_at = CURRENT_TIMESTAMP 
        WHERE id = ?
      `);

      stmt.run(status, message || null, mcpId);
      console.log(`MCP ${mcpId} status updated to: ${status}`);
    } catch (error) {
      console.error(`Error updating status for MCP ${mcpId}:`, error);
      throw error;
    }
  }

  /**
   * Salvar informações de ambiente de um MCP instalado
   */
  static saveEnvironment(mcpId: string, environment: any): void {
    try {
      const stmt = db.prepare(`
        UPDATE mcp_installations 
        SET environment_path = ?, 
            executable_command = ?, 
            updated_at = CURRENT_TIMESTAMP 
        WHERE id = ?
      `);

      const executableCommand = `${environment.executable} ${(
        environment.args || []
      ).join(" ")}`.trim();

      stmt.run(environment.path, executableCommand, mcpId);
      console.log(`MCP ${mcpId} environment saved`);
    } catch (error) {
      console.error(`Error saving environment for MCP ${mcpId}:`, error);
      throw error;
    }
  }

  /**
   * Obter ambiente de um MCP instalado
   */
  static getEnvironment(mcpId: string): any | null {
    try {
      const stmt = db.prepare(`
        SELECT environment_path, executable_command 
        FROM mcp_installations 
        WHERE id = ?
      `);

      const result = stmt.get(mcpId) as any;

      if (!result || !result.environment_path) {
        return null;
      }

      // Reconstruir objeto de ambiente
      const parts = result.executable_command.split(" ");
      return {
        path: result.environment_path,
        executable: parts[0],
        args: parts.slice(1),
      };
    } catch (error) {
      console.error(`Error getting environment for MCP ${mcpId}:`, error);
      return null;
    }
  }

  /**
   * Adicionar logs de instalação
   */
  static appendLogs(mcpId: string, logs: string[]): void {
    try {
      const stmt = db.prepare(`
        SELECT install_logs FROM mcp_installations WHERE id = ?
      `);

      const result = stmt.get(mcpId) as
        | { install_logs: string | null }
        | undefined;
      const existingLogs = result?.install_logs
        ? JSON.parse(result.install_logs)
        : [];
      const updatedLogs = [...existingLogs, ...logs];

      // Limitar a 1000 linhas de log
      const trimmedLogs = updatedLogs.slice(-1000);

      const updateStmt = db.prepare(`
        UPDATE mcp_installations 
        SET install_logs = ?, updated_at = CURRENT_TIMESTAMP 
        WHERE id = ?
      `);

      updateStmt.run(JSON.stringify(trimmedLogs), mcpId);
    } catch (error) {
      console.error(`Error appending logs for MCP ${mcpId}:`, error);
    }
  }

  /**
   * Salvar resultado de validação
   */
  static saveValidationResult(mcpId: string, validationResult: any): void {
    try {
      const stmt = db.prepare(`
        UPDATE mcp_installations 
        SET validation_result = ?, updated_at = CURRENT_TIMESTAMP 
        WHERE id = ?
      `);

      stmt.run(JSON.stringify(validationResult), mcpId);
      console.log(`MCP ${mcpId} validation result saved`);
    } catch (error) {
      console.error(`Error saving validation result for MCP ${mcpId}:`, error);
    }
  }

  /**
   * Salvar ferramentas validadas
   */
  static saveTools(mcpId: string, tools: any[]): void {
    try {
      const stmt = db.prepare(`
        UPDATE mcp_installations 
        SET tools = ?, updated_at = CURRENT_TIMESTAMP 
        WHERE id = ?
      `);

      stmt.run(JSON.stringify(tools), mcpId);
      console.log(`MCP ${mcpId} tools saved: ${tools.length} tools`);
    } catch (error) {
      console.error(`Error saving tools for MCP ${mcpId}:`, error);
    }
  }
}