package com.sb.web.auth.controller;

import com.sb.web.auth.dto.LoginRequest;
import com.sb.web.auth.dto.LoginResponse;
import com.sb.web.auth.dto.MemberResponse;
import com.sb.web.auth.dto.PasswordChangeRequest;
import com.sb.web.auth.dto.SessionUser;
import com.sb.web.auth.dto.SignupRequest;
import com.sb.web.auth.service.AuthService;
import com.sb.web.auth.web.AuthInterceptor;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.validation.Valid;
import lombok.RequiredArgsConstructor;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;

/**
 * 인증 API.
 *   POST /api/auth/signup  회원가입 (비보호)
 *   POST /api/auth/login   로그인   (비보호)
 *   POST /api/auth/logout  로그아웃 (보호)
 *   GET  /api/auth/me      내 정보  (보호)
 */
@RestController
@RequestMapping("/api/auth")
@RequiredArgsConstructor
public class AuthController {

    private final AuthService authService;
    private final com.sb.web.admin.service.AppSettingService appSettingService;

    /** 회원가입 허용 여부 (비보호) — 프론트가 가입 진입 전에 차단 표시용 */
    @GetMapping("/signup-enabled")
    public java.util.Map<String, Boolean> signupEnabled() {
        return java.util.Map.of("enabled", appSettingService.isSignupEnabled());
    }

    @PostMapping("/signup")
    public ResponseEntity<MemberResponse> signup(@Valid @RequestBody SignupRequest req,
            HttpServletRequest request) {
        return ResponseEntity.status(HttpStatus.CREATED).body(authService.signup(req, clientIp(request)));
    }

    /** 클라이언트 IP (nginx 프록시 뒤 → X-Forwarded-For 우선) */
    private String clientIp(HttpServletRequest request) {
        String xff = request.getHeader("X-Forwarded-For");
        if (xff != null && !xff.isBlank()) {
            return xff.split(",")[0].trim();
        }
        return request.getRemoteAddr();
    }

    @PostMapping("/login")
    public LoginResponse login(@Valid @RequestBody LoginRequest req, HttpServletRequest request) {
        return authService.login(req, clientIp(request));
    }

    /** 구글 OAuth 클라이언트 ID (비보호) — 프론트가 구글 버튼 노출/초기화에 사용. 미설정 시 빈 문자열 */
    @GetMapping("/google-client-id")
    public java.util.Map<String, String> googleClientId() {
        return java.util.Map.of("clientId", authService.googleClientId());
    }

    /** 구글 로그인/가입 (비보호) — ID 토큰 검증 후 세션 발급 */
    @PostMapping("/google")
    public LoginResponse googleLogin(@Valid @RequestBody com.sb.web.auth.dto.GoogleLoginRequest req) {
        return authService.googleLogin(req.getIdToken(), req.isRememberMe());
    }

    @PostMapping("/logout")
    public ResponseEntity<Void> logout(HttpServletRequest request) {
        authService.logout(AuthInterceptor.resolveToken(request));
        return ResponseEntity.noContent().build();
    }

    @GetMapping("/me")
    public SessionUser me(@RequestAttribute(AuthInterceptor.CURRENT_MEMBER) SessionUser current) {
        return current;
    }

    @PutMapping("/password")
    public ResponseEntity<Void> changePassword(
            @Valid @RequestBody PasswordChangeRequest req,
            @RequestAttribute(AuthInterceptor.CURRENT_MEMBER) SessionUser current) {
        authService.changePassword(current.getId(), req);
        return ResponseEntity.noContent().build();
    }

    /** 가입정보 변경 진입 전 비밀번호 재인증 */
    @PostMapping("/verify-password")
    public ResponseEntity<Void> verifyPassword(
            @Valid @RequestBody com.sb.web.auth.dto.PasswordVerifyRequest req,
            @RequestAttribute(AuthInterceptor.CURRENT_MEMBER) SessionUser current) {
        authService.verifyPassword(current.getId(), req.getPassword());
        return ResponseEntity.noContent().build();
    }

    /** 가입정보(이름/이메일) 변경 */
    @PutMapping("/profile")
    public MemberResponse updateProfile(
            @Valid @RequestBody com.sb.web.auth.dto.ProfileUpdateRequest req,
            @RequestAttribute(AuthInterceptor.CURRENT_MEMBER) SessionUser current,
            HttpServletRequest request) {
        return authService.updateProfile(current.getId(), AuthInterceptor.resolveToken(request), req);
    }
}