import { Controller } from "@tsed/di";
import { Get, Post, Put, Patch, Delete, Tags, Summary, Description, Returns, Security } from "@tsed/schema";
import { BodyParams, PathParams, QueryParams } from "@tsed/platform-params";
import { Req } from "@tsed/platform-http";
import { BadRequest, Unauthorized, NotFound } from "@tsed/exceptions";
import jwt from "jsonwebtoken";
import { AdminService } from "../../services/AdminService.js";
import { UserService } from "../../services/UserService.js";

const JWT_SECRET = process.env.JWT_SECRET || "your-secret-key";

@Controller("/admin")
@Tags("Admin")
@Security("bearerAuth")
export class AdminController {
  private adminService = new AdminService();
  private userService = new UserService();

  // Middleware to check if user is admin
  private async checkAdmin(req: any) {
    const token = req.headers.authorization?.replace("Bearer ", "");
    
    if (!token) {
      throw new Unauthorized("No token provided");
    }

    try {
      const decoded = jwt.verify(token, JWT_SECRET) as any;
      const user = await this.userService.getUserById(decoded.userId);
      
      if (!user) {
        throw new Unauthorized("User not found");
      }

      if (user.role !== 'admin') {
        throw new Unauthorized("Admin access required");
      }

      return user;
    } catch (error) {
      throw new Unauthorized("Invalid token or insufficient permissions");
    }
  }

  // System Statistics
  @Get("/statistics")
  @Summary("Get system statistics")
  @Description("High-level metrics: users, jobs, interviews, tokens, revenue")
  @(Returns(200).Description("Statistics returned"))
  @(Returns(401).Description("Unauthorized"))
  async getSystemStatistics(@Req() req: any) {
    await this.checkAdmin(req);
    return await this.adminService.getSystemStatistics();
  }

  // User Management
  @Get("/users")
  @Summary("List all users")
  @(Returns(200).Description("Users returned"))
  async getAllUsers(@Req() req: any) {
    await this.checkAdmin(req);
    return await this.adminService.getAllUsers();
  }

  @Get("/users/:id")
  @Summary("Get a user by ID")
  @(Returns(200).Description("User returned"))
  @(Returns(404).Description("User not found"))
  async getUserById(@Req() req: any, @PathParams("id") id: string) {
    await this.checkAdmin(req);
    return await this.adminService.getUserById(id);
  }

  @Put("/users/:id")
  @Summary("Update a user")
  @(Returns(200).Description("User updated"))
  async updateUser(
    @Req() req: any,
    @PathParams("id") id: string,
    @BodyParams() userData: any
  ) {
    await this.checkAdmin(req);
    return await this.adminService.updateUser(id, userData);
  }

  @Patch("/users/:id/toggle-status")
  @Summary("Toggle user active status")
  @(Returns(200).Description("User status toggled"))
  async toggleUserStatus(@Req() req: any, @PathParams("id") id: string) {
    await this.checkAdmin(req);
    return await this.adminService.toggleUserStatus(id);
  }

  @Patch("/users/:id/password")
  @Summary("Change user password")
  @(Returns(200).Description("Password updated"))
  async changeUserPassword(
    @Req() req: any,
    @PathParams("id") id: string,
    @BodyParams() body: { new_password: string }
  ) {
    await this.checkAdmin(req);
    return await this.adminService.changeUserPassword(id, body.new_password);
  }

  @Post("/users")
  @Summary("Create a user")
  @(Returns(200).Description("User created"))
  async createUser(@Req() req: any, @BodyParams() userData: any) {
    await this.checkAdmin(req);
    return await this.adminService.createUser(userData);
  }

  // Job Management
  @Get("/jobs")
  @Summary("List all jobs")
  @(Returns(200).Description("Jobs returned"))
  async getAllJobs(@Req() req: any) {
    await this.checkAdmin(req);
    return await this.adminService.getAllJobs();
  }

  @Get("/jobs/:id")
  @Summary("Get job by ID")
  @(Returns(200).Description("Job returned"))
  async getJobById(@Req() req: any, @PathParams("id") id: string) {
    await this.checkAdmin(req);
    return await this.adminService.getJobById(id);
  }

  @Patch("/jobs/:id/status")
  @Summary("Update job status")
  @(Returns(200).Description("Job status updated"))
  async updateJobStatus(
    @Req() req: any,
    @PathParams("id") id: string,
    @BodyParams() body: { status: string }
  ) {
    await this.checkAdmin(req);
    return await this.adminService.updateJobStatus(id, body.status);
  }

  @Put("/jobs/:id")
  @Summary("Update job details")
  @(Returns(200).Description("Job updated"))
  async updateJob(
    @Req() req: any,
    @PathParams("id") id: string,
    @BodyParams() jobData: any
  ) {
    await this.checkAdmin(req);
    return await this.adminService.updateJob(id, jobData);
  }

  // Token Management
  @Get("/user-token-summaries")
  @Summary("List user token summaries")
  @(Returns(200).Description("Summaries returned"))
  async getUserTokenSummaries(@Req() req: any) {
    await this.checkAdmin(req);
    return await this.adminService.getUserTokenSummaries();
  }

  @Post("/add-tokens")
  @Summary("Add tokens to a user")
  @(Returns(200).Description("Tokens added"))
  async addTokensToUser(@Req() req: any, @BodyParams() tokenData: any) {
    await this.checkAdmin(req);
    return await this.adminService.addTokensToUser(tokenData);
  }

  @Get("/token-packages")
  @Summary("List token packages")
  @(Returns(200).Description("Packages returned"))
  async getTokenPackages(@Req() req: any) {
    await this.checkAdmin(req);
    return await this.adminService.getTokenPackages();
  }

  @Post("/token-packages")
  @Summary("Create token package")
  @(Returns(200).Description("Package created"))
  async createTokenPackage(@Req() req: any, @BodyParams() packageData: any) {
    await this.checkAdmin(req);
    return await this.adminService.createTokenPackage(packageData);
  }

  @Put("/token-packages/:id")
  @Summary("Update token package")
  @(Returns(200).Description("Package updated"))
  async updateTokenPackage(
    @Req() req: any,
    @PathParams("id") id: string,
    @BodyParams() packageData: any
  ) {
    await this.checkAdmin(req);
    return await this.adminService.updateTokenPackage(id, packageData);
  }

  @Patch("/token-packages/:id/toggle-status")
  @Summary("Toggle token package active status")
  @(Returns(200).Description("Package status toggled"))
  async toggleTokenPackageStatus(@Req() req: any, @PathParams("id") id: string) {
    await this.checkAdmin(req);
    return await this.adminService.toggleTokenPackageStatus(id);
  }

  @Delete("/token-packages/:id")
  @Summary("Delete token package")
  @(Returns(200).Description("Package deleted"))
  async deleteTokenPackage(@Req() req: any, @PathParams("id") id: string) {
    await this.checkAdmin(req);
    return await this.adminService.deleteTokenPackage(id);
  }

  // Interview Management
  @Get("/interviews")
  @Summary("List interviews")
  @(Returns(200).Description("Interviews returned"))
  async getAllInterviews(@Req() req: any) {
    await this.checkAdmin(req);
    return await this.adminService.getAllInterviews();
  }

  @Get("/interviews/:id")
  @Summary("Get interview by ID")
  @(Returns(200).Description("Interview returned"))
  async getInterviewById(@Req() req: any, @PathParams("id") id: string) {
    await this.checkAdmin(req);
    return await this.adminService.getInterviewById(id);
  }

  // Payment Records
  @Get("/payments")
  @Summary("List payment records")
  @(Returns(200).Description("Payments returned"))
  async getPaymentRecords(@Req() req: any) {
    await this.checkAdmin(req);
    return await this.adminService.getPaymentRecords();
  }

  @Get("/payments/:id")
  @Summary("Get payment by ID")
  @(Returns(200).Description("Payment returned"))
  async getPaymentById(@Req() req: any, @PathParams("id") id: string) {
    await this.checkAdmin(req);
    return await this.adminService.getPaymentById(id);
  }

  // Job Links Management
  @Get("/jobs/:id/links")
  @Summary("Get job links")
  @(Returns(200).Description("Job links returned"))
  async getJobLinks(@Req() req: any, @PathParams("id") id: string) {
    await this.checkAdmin(req);
    return await this.adminService.getJobLinks(id);
  }

  @Post("/jobs/:id/create-link")
  @Summary("Create job link for testing")
  @(Returns(200).Description("Job link created"))
  async createJobLink(@Req() req: any, @PathParams("id") id: string, @BodyParams() linkData: any) {
    await this.checkAdmin(req);
    return await this.adminService.createJobLink(id, linkData.tokensAvailable || 1);
  }
}