package com.recipeapp.common;

import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import java.util.List;

@RestControllerAdvice
public class GlobalExceptionHandler {

    @ExceptionHandler(MethodArgumentNotValidException.class)
    public ResponseEntity<ApiError> handleValidation(MethodArgumentNotValidException ex) {
        List<String> details = ex.getBindingResult().getFieldErrors().stream()
                .map(e -> e.getField() + ": " + e.getDefaultMessage())
                .toList();
        return ResponseEntity.status(HttpStatus.BAD_REQUEST)
                .body(ApiError.of("VALIDATION_ERROR", "Validation failed", details));
    }

    @ExceptionHandler(ResourceNotFoundException.class)
    public ResponseEntity<ApiError> handleNotFound(ResourceNotFoundException ex) {
        return ResponseEntity.status(HttpStatus.NOT_FOUND)
                .body(ApiError.of("NOT_FOUND", ex.getMessage()));
    }

    @ExceptionHandler(ConflictException.class)
    public ResponseEntity<ApiError> handleConflict(ConflictException ex) {
        return ResponseEntity.status(HttpStatus.CONFLICT)
                .body(ApiError.of("CONFLICT", ex.getMessage()));
    }

    @ExceptionHandler(ForbiddenException.class)
    public ResponseEntity<ApiError> handleForbidden(ForbiddenException ex) {
        return ResponseEntity.status(HttpStatus.FORBIDDEN)
                .body(ApiError.of("FORBIDDEN", ex.getMessage()));
    }

    @ExceptionHandler(ValidationException.class)
    public ResponseEntity<ApiError> handleBusinessValidation(ValidationException ex) {
        return ResponseEntity.status(HttpStatus.UNPROCESSABLE_ENTITY)
                .body(ApiError.of("VALIDATION_ERROR", ex.getMessage()));
    }
}