package com.yundage.chat.controller;

import com.yundage.chat.common.ApiResponse;
import com.yundage.chat.common.ErrorCode;
import com.yundage.chat.dto.*;
import com.yundage.chat.service.UserService;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.responses.ApiResponses;
import io.swagger.v3.oas.annotations.tags.Tag;
import jakarta.validation.Valid;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.HashMap;
import java.util.Map;

@RestController
@RequestMapping("/api/auth")
@Tag(name = "认证管理", description = "用户认证相关接口")
public class AuthController {
    
    @Autowired
    private UserService userService;
    
    @PostMapping("/send-code")
    @Operation(summary = "发送验证码", description = "向手机或邮箱发送验证码")
    @ApiResponses(value = {
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "200", description = "验证码发送成功"),
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "400", description = "验证码发送失败")
    })
    public ApiResponse<?> sendVerificationCode(@Valid @RequestBody VerificationCodeRequest request) {
        try {
            String code = userService.sendVerificationCode(request.getContact());
            Map<String, String> data = new HashMap<>();
            data.put("message", "验证码已发送");
            // 仅在开发模式下返回验证码
            if (code != null) {
                data.put("code", code);
            }
            return ApiResponse.success("验证码发送成功", data);
        } catch (Exception e) {
            return ApiResponse.error(ErrorCode.VERIFICATION_CODE_SEND_FAILED, e.getMessage());
        }
    }
    
    @PostMapping("/register")
    @Operation(summary = "用户注册", description = "注册新用户账号")
    @ApiResponses(value = {
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "200", description = "注册成功"),
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "400", description = "注册失败")
    })
    public ApiResponse<AuthResponse> register(@Valid @RequestBody RegisterRequest request) {
        try {
            AuthResponse response = userService.register(request);
            return ApiResponse.success("注册成功", response);
        } catch (RuntimeException e) {
            String message = e.getMessage();
            if (message.contains("邮箱已被注册")) {
                return ApiResponse.error(ErrorCode.EMAIL_ALREADY_REGISTERED, message);
            } else if (message.contains("手机号已被注册")) {
                return ApiResponse.error(ErrorCode.PHONE_ALREADY_REGISTERED, message);
            } else if (message.contains("验证码")) {
                return ApiResponse.error(ErrorCode.VERIFICATION_CODE_INVALID, message);
            } else {
                return ApiResponse.error(ErrorCode.REGISTER_FAILED, message);
            }
        } catch (Exception e) {
            return ApiResponse.error(ErrorCode.REGISTER_FAILED, "注册失败");
        }
    }
    
    @PostMapping("/login")
    @Operation(summary = "用户登录", description = "使用验证码登录")
    @ApiResponses(value = {
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "200", description = "登录成功"),
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "400", description = "登录失败")
    })
    public ApiResponse<AuthResponse> login(@Valid @RequestBody LoginRequest request) {
        try {
            AuthResponse response = userService.login(request);
            return ApiResponse.success("登录成功", response);
        } catch (RuntimeException e) {
            String message = e.getMessage();
            if (message.contains("验证码无效") || message.contains("验证码已过期")) {
                return ApiResponse.error(ErrorCode.VERIFICATION_CODE_INVALID, message);
            } else if (message.contains("用户不存在")) {
                return ApiResponse.error(ErrorCode.USER_NOT_FOUND, message);
            } else {
                return ApiResponse.error(ErrorCode.LOGIN_FAILED, message);
            }
        } catch (Exception e) {
            return ApiResponse.error(ErrorCode.LOGIN_FAILED, "登录失败");
        }
    }
    
    @PostMapping("/logout")
    @Operation(summary = "用户登出", description = "退出用户登录状态")
    @ApiResponses(value = {
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "200", description = "登出成功"),
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "400", description = "登出失败")
    })
    public ApiResponse<?> logout() {
        try {
            userService.logout();
            return ApiResponse.success("登出成功");
        } catch (Exception e) {
            return ApiResponse.error(ErrorCode.INTERNAL_ERROR, "登出失败: " + e.getMessage());
        }
    }
    
    @PostMapping("/forgot-password")
    @Operation(summary = "忘记密码", description = "发送密码重置邮件")
    @ApiResponses(value = {
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "200", description = "邮件发送成功"),
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "400", description = "邮件发送失败")
    })
    public ApiResponse<?> forgotPassword(@Valid @RequestBody PasswordResetRequest request) {
        try {
            userService.requestPasswordReset(request);
            return ApiResponse.success("密码重置邮件已发送");
        } catch (RuntimeException e) {
            if (e.getMessage().contains("用户不存在")) {
                return ApiResponse.error(ErrorCode.USER_NOT_FOUND, e.getMessage());
            } else {
                return ApiResponse.error(ErrorCode.INTERNAL_ERROR, e.getMessage());
            }
        } catch (Exception e) {
            return ApiResponse.error(ErrorCode.INTERNAL_ERROR, "邮件发送失败");
        }
    }
    
    @PostMapping("/reset-password")
    @Operation(summary = "重置密码", description = "使用token重置密码")
    @ApiResponses(value = {
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "200", description = "密码重置成功"),
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "400", description = "密码重置失败")
    })
    public ApiResponse<?> resetPassword(@Valid @RequestBody ResetPasswordRequest request) {
        try {
            userService.resetPassword(request);
            return ApiResponse.success("密码重置成功");
        } catch (RuntimeException e) {
            String message = e.getMessage();
            if (message.contains("重置令牌无效") || message.contains("已过期")) {
                return ApiResponse.error(ErrorCode.PASSWORD_RESET_TOKEN_INVALID, message);
            } else if (message.contains("用户不存在")) {
                return ApiResponse.error(ErrorCode.USER_NOT_FOUND, message);
            } else {
                return ApiResponse.error(ErrorCode.INTERNAL_ERROR, message);
            }
        } catch (Exception e) {
            return ApiResponse.error(ErrorCode.INTERNAL_ERROR, "密码重置失败");
        }
    }
}