package com.onekeycall.videotablet.controller;

import com.onekeycall.videotablet.dto.TokenPair;
import com.onekeycall.videotablet.entity.User;
import com.onekeycall.videotablet.result.Result;
import com.onekeycall.videotablet.service.UserService;
import com.onekeycall.videotablet.utils.JwtUtil;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.web.bind.annotation.*;

import java.util.*;

@RestController
@RequestMapping("/public")
public class LoginController {

    private final UserService userService;
    private final AuthenticationManager authenticationManager;

    @Autowired
    private RedisTemplate<String, Object> redisTemplate;
    @Autowired
    private JwtUtil jwtUtil;

    @Autowired
    public LoginController(UserService userService, AuthenticationManager authenticationManager) {
        this.userService = userService;
        this.authenticationManager = authenticationManager;
    }

    @PostMapping("/register")
    public ResponseEntity<?> registerUser(@RequestBody RegisterRequest registerRequest) {
        try {
            userService.registerUser(registerRequest.getUsername(), registerRequest.getPassword());
            return new ResponseEntity<>("User registered successfully", HttpStatus.CREATED);
        } catch (RuntimeException e) {
            return new ResponseEntity<>(e.getMessage(), HttpStatus.BAD_REQUEST);
        }
    }

    @PostMapping("/phone_login")
    public Result phoneLogin(
            @RequestHeader("Device-ID") String deviceId,
            @RequestParam String phone, @RequestParam String password) {
        User user = userService.getUserByPhone(phone);
        if (user == null) {
            return Result.error().message("User not found with phone: " + phone);
        }
        String userId = user.getUserId();

        // 1. 创建认证令牌
        Authentication authenticationToken = new UsernamePasswordAuthenticationToken(userId, password);

        try {
            // 2. 使用 AuthenticationManager 进行认证（核心步骤）
            Authentication authentication = authenticationManager.authenticate(authenticationToken);

            // 3. 认证成功后生成 JWT
            User userDetails = (User) authentication.getPrincipal();
            TokenPair tokenPair = jwtUtil.generateTokenPair(userDetails.getUserId(), deviceId);
            // 4. 返回 Token
            return Result.ok().data(Collections.singletonMap("token", tokenPair.toMap()));
        } catch (Exception e) {
            e.printStackTrace();
            return Result.error().message("登录失败");
        }
    }

    @PostMapping("/login")
    public ResponseEntity<?> login(
            @RequestHeader("Device-ID") String deviceId,
            @RequestParam(value = "user_id") String userId, @RequestParam String password) {
        // 1. 创建认证令牌
        Authentication authenticationToken = new UsernamePasswordAuthenticationToken(userId, password);

        // 2. 使用 AuthenticationManager 进行认证（核心步骤）
        Authentication authentication = authenticationManager.authenticate(authenticationToken);

        // 3. 认证成功后生成 JWT
        User userDetails = (User) authentication.getPrincipal();
        TokenPair tokenPair = jwtUtil.generateTokenPair(userDetails.getUserId(), deviceId);

        // 4. 返回 Token
        return ResponseEntity.ok(Collections.singletonMap("token", tokenPair.toMap()));
    }

    // 注册请求参数类
    public static class RegisterRequest {
        private String username;
        private String password;

        // Getters and Setters
        public String getUsername() {
            return username;
        }

        public void setUsername(String username) {
            this.username = username;
        }

        public String getPassword() {
            return password;
        }

        public void setPassword(String password) {
            this.password = password;
        }

    }

    @PostMapping("/phone_register")
    public Result registerByPhone(
            @RequestParam String phone, @RequestParam String code,
            @RequestParam(value = "verify_key") String verifyKey, @RequestParam(value = "device_id") String deviceId) {
//
//        if (TextUtils.isEmpty(verifyKey)) {
//            return Result.error().message("verify key is empty", HttpStatus.BAD_REQUEST);
//        }
        Map<String, Object> map = (Map<String, Object>) redisTemplate.opsForValue().get(phone);
        if (map != null) {
            String redisVerifyKey = (String) map.get("verifyKey");
            if (!Objects.equals(redisVerifyKey, verifyKey)) {
                return Result.error().message("verify key is not same");
            }
            String redisCode = map.get("code").toString();
            if (!Objects.equals(redisCode, code)) {
                return Result.error().message("code is not same");
            }
            try {
                User user = userService.registerByPhone(phone, code, deviceId, new Date());
                TokenPair tokenPair = jwtUtil.generateTokenPair(user.getUserId(), deviceId);
                //返回给app保存，access_token用来加入header请求接口，refresh_token用来更换access_token
                Map<String, Object> tokenMap = new HashMap<>();
                tokenMap.put("new_user", user.isNewUser());
                tokenMap.put("user_id", user.getUserId());
                tokenMap.put("has_password", user.isHasPassword());
                tokenMap.put("token", tokenPair.toMap());
                return Result.ok().data(tokenMap);
            } catch (RuntimeException e) {
                return Result.error().message(e.getMessage());
            } finally {
                redisTemplate.delete(phone);
            }
        } else {
            return Result.error().message("verify key is expired");
        }
    }

    @PostMapping("/phone_code_login")
    public Result loginByPhoneCode(
            @RequestParam String phone, @RequestParam String code,
            @RequestParam(value = "verify_key") String verifyKey, @RequestParam(value = "device_id") String deviceId) {
        Map<String, Object> map = (Map<String, Object>) redisTemplate.opsForValue().get(phone);
        if (map != null) {
            String redisVerifyKey = (String) map.get("verifyKey");
            if (!Objects.equals(redisVerifyKey, verifyKey)) {
                return Result.error().message("verify key is not same");
            }
            String redisCode = map.get("code").toString();
            if (!Objects.equals(redisCode, code)) {
                return Result.error().message("code is not same");
            }
            try {
                User user = userService.loginByPhone(phone, code);
                // 生成并返回JWT令牌（实际项目中需要实现JWT逻辑）
                TokenPair tokenPair = jwtUtil.generateTokenPair(user.getUserId(), deviceId);
                Map<String, Object> tokenMap = new HashMap<>();
                tokenMap.put("new_user", user.isNewUser());
                tokenMap.put("user_id", user.getUserId());
                tokenMap.put("has_password", user.isHasPassword());
                tokenMap.put("token", tokenPair.toMap());
                return Result.ok().data(tokenMap);
            } catch (RuntimeException e) {
                return Result.error().message(e.getMessage());
            }
        } else {
            return Result.error().message("verify key is expired");
        }
    }


}