package kr.re.etri.autoflow.controllers;

import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.tags.Tag;
import kr.re.etri.autoflow.service.ExternalAuthService;
import lombok.RequiredArgsConstructor;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;

@RestController
@RequestMapping("/api/external-auth")
@Tag(name = "ExternalAuthController", description = "외부 백엔드 로그인 및 Bearer 토큰 조회 API")
@RequiredArgsConstructor
public class ExternalAuthController {

    private final ExternalAuthService externalAuthService;

    @Operation(summary = "외부 로그인 후 Bearer 토큰 조회", description = "외부 Spring 백엔드에 로그인 요청 후 Bearer 토큰을 반환합니다.")
    @PostMapping("/signin")
    public ResponseEntity<ApiResponse> signin(
            @RequestBody SigninRequest request
    ) {
        try {
            String token = externalAuthService.getBearerToken(request.id(), request.password());
            return ResponseEntity.ok(ApiResponse.success(token));
        } catch (Exception e) {
            return ResponseEntity.ok(ApiResponse.failure(e.getMessage()));
        }
    }

    // DTO: 요청
    public static record SigninRequest(String id, String password) { }

    // DTO: 응답
    public static class ApiResponse {
        private boolean success;
        private Object data;
        private String errorMessage;

        public ApiResponse(boolean success, Object data, String errorMessage) {
            this.success = success;
            this.data = data;
            this.errorMessage = errorMessage;
        }

        public static ApiResponse success(Object data) {
            return new ApiResponse(true, data, null);
        }

        public static ApiResponse failure(String errorMessage) {
            return new ApiResponse(false, null, errorMessage);
        }

        public boolean isSuccess() { return success; }
        public Object getData() { return data; }
        public String getErrorMessage() { return errorMessage; }
    }
}