import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:app_settings/app_settings.dart';

class PermissionUtil {
  /// 检查并请求多个权限
  ///
  /// [permissions] 要检查的权限列表，如 [Permission.microphone, Permission.location]
  /// [rationaleTitle] 弹窗标题
  /// [rationaleMessage] 权限用途说明内容（支持多行）
  ///
  /// 返回是否所有权限都已被授予
  static Future<bool> checkAndRequestPermissions({
    required List<Permission> permissions,
    required String rationaleTitle,
    required List<String> rationaleMessage,
  }) async {
    try {
      Map<Permission, PermissionStatus> statuses = {};

      // 检查是否都已授权
      bool allGranted = true;
      for (var permission in permissions) {
        final status = await permission.status;
        if (!status.isGranted) {
          allGranted = false;
          statuses[permission] = status;
        }
      }

      if (allGranted) return true;

      // 判断是否包含永久拒绝
      bool hasPermanentDenied =
          statuses.values.any((status) => status.isPermanentlyDenied);

      // 显示提示弹窗
      _showPermissionDialog(
        isPermanent: hasPermanentDenied,
        title: rationaleTitle,
        messages: rationaleMessage,
        onConfirm: () async {
          if (hasPermanentDenied) {
            AppSettings.openAppSettings();
          } else {
            final newStatuses = await permissions.request();
            final allGrantedNow =
                newStatuses.values.every((status) => status.isGranted);
            if (!allGrantedNow) {
              print("部分权限被拒绝: $newStatuses");
            }
          }
        },
      );

      return false;
    } catch (e) {
      print("权限检查异常: $e");
      return false;
    }
  }

  /// 权限说明弹窗
  static void _showPermissionDialog({
    required bool isPermanent,
    required String title,
    required List<String> messages,
    required VoidCallback onConfirm,
  }) {
    Get.generalDialog(
      barrierDismissible: false,
      barrierLabel: '权限提示',
      transitionBuilder: (context, anim1, anim2, child) {
        return SlideTransition(
          position: Tween<Offset>(
            begin: Offset(0, -1),
            end: Offset(0, 0),
          ).animate(CurvedAnimation(parent: anim1, curve: Curves.easeOut)),
          child: child,
        );
      },
      pageBuilder: (context, anim1, anim2) {
        return SafeArea(
          child: Align(
            alignment: Alignment.topCenter,
            child: Padding(
              padding: const EdgeInsets.only(top: 80, left: 24, right: 24),
              child: Material(
                borderRadius: BorderRadius.circular(12),
                color: Colors.white,
                child: Padding(
                  padding: const EdgeInsets.all(16),
                  child: Column(
                    mainAxisSize: MainAxisSize.min,
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Text(title,
                          style: TextStyle(
                              fontSize: 18, fontWeight: FontWeight.bold)),
                      const SizedBox(height: 12),
                      ...messages.map((msg) => Padding(
                            padding: const EdgeInsets.only(bottom: 8),
                            child: Text("• $msg"),
                          )),
                      const SizedBox(height: 20),
                      Row(
                        mainAxisAlignment: MainAxisAlignment.end,
                        children: [
                          TextButton(
                            onPressed: () => Get.back(),
                            child: const Text('取消'),
                          ),
                          const SizedBox(width: 8),
                          TextButton(
                            onPressed: () {
                              Get.back();
                              onConfirm();
                            },
                            child: Text(isPermanent ? '前往设置' : '授权'),
                          ),
                        ],
                      ),
                    ],
                  ),
                ),
              ),
            ),
          ),
        );
      },
    );
  }
}