package com.arena.combat.config;

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

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@RestControllerAdvice
public class GlobalExceptionHandler {

    @ExceptionHandler(IllegalArgumentException.class)
    public ResponseEntity<Map<String, Object>> handleIllegalArgument(IllegalArgumentException ex) {
        Map<String, Object> body = new HashMap<>();
        body.put("timestamp", LocalDateTime.now());
        body.put("status", HttpStatus.BAD_REQUEST.value());
        body.put("error", "Solicitud Inválida");
        body.put("message", ex.getMessage());
        return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(body);
    }

    @ExceptionHandler(IllegalStateException.class)
    public ResponseEntity<Map<String, Object>> handleIllegalState(IllegalStateException ex) {
        Map<String, Object> body = new HashMap<>();
        body.put("timestamp", LocalDateTime.now());
        body.put("status", HttpStatus.CONFLICT.value());
        body.put("error", "Estado de Conflicto en Combate");
        body.put("message", ex.getMessage());
        return ResponseEntity.status(HttpStatus.CONFLICT).body(body);
    }

    @ExceptionHandler(MethodArgumentNotValidException.class)
    public ResponseEntity<Map<String, Object>> handleValidationExceptions(MethodArgumentNotValidException ex) {
        Map<String, Object> body = new HashMap<>();
        body.put("timestamp", LocalDateTime.now());
        body.put("status", HttpStatus.BAD_REQUEST.value());
        body.put("error", "Error de Validación");

        Map<String, String> fieldErrors = new HashMap<>();
        for (FieldError error : ex.getBindingResult().getFieldErrors()) {
            fieldErrors.put(error.getField(), error.getDefaultMessage());
        }
        body.put("fieldErrors", fieldErrors);
        return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(body);
    }

    @ExceptionHandler(Exception.class)
    public ResponseEntity<Map<String, Object>> handleGenericException(Exception ex) {
        Map<String, Object> body = new HashMap<>();
        body.put("timestamp", LocalDateTime.now());
        body.put("status", HttpStatus.INTERNAL_SERVER_ERROR.value());
        body.put("error", "Error Interno del Servidor");
        body.put("message", ex.getMessage() != null ? ex.getMessage() : "Ocurrió un error inesperado");
        return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(body);
    }
}