import 'dart:io';
import 'package:dio/dio.dart' as dio;
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:getx_scaffold/getx_scaffold.dart';
import 'package:image_picker/image_picker.dart';
import 'package:ln_jq_app/common/model/base_model.dart';
import 'package:ln_jq_app/common/model/vehicle_info.dart';
import 'package:ln_jq_app/storage_service.dart';
import 'package:permission_handler/permission_handler.dart';

class QrCodeController extends GetxController with BaseControllerMixin {
  @override
  String get builderId => 'qrcode';

  final RxBool hasCameraPermission = false.obs;

  @override
  void onInit() {
    super.onInit();
    _checkPermission();
  }

  /// 检查权限
  void _checkPermission() async {
    var status = await Permission.camera.status;
    hasCameraPermission.value = status.isGranted;
  }

  /// 1. 拍照并识别车牌流程
  void takePhotoAndRecognize() async {
    var status = await Permission.camera.request();
    if (!status.isGranted) {
      if (status.isPermanentlyDenied) openAppSettings();
      showErrorToast("需要相机权限才能拍照识别");
      return;
    }

    final XFile? photo = await ImagePicker().pickImage(
      source: ImageSource.camera,
      imageQuality: 80, // 压缩图片质量以加快上传
    );
    if (photo == null) return;

    // 1.1 上传文件
    String? imageUrl = await uploadFile(photo.path);
    if (imageUrl != null) {
      // 1.2 获取车牌号
      String? plateNumber = await getPlateNumber(imageUrl);
      if (plateNumber != null) {
        // 1.3 弹窗确认
        manualInputBind(plateNumber, 0);
      }
    }
  }

  /// 手动输入车牌绑定
  void manualInputBind(String plateNumber, int source) {
    final TextEditingController controller = TextEditingController(
      text: plateNumber.toUpperCase() ?? '',
    );

    DialogX.to.showConfirmDialog(
      title: source == 0 ? "识别结果" : '手动输入车牌',
      content: SizedBox(
        height: 40.h,
        child: TextField(
          textAlign: TextAlign.start,
          controller: controller,
          autofocus: plateNumber.isEmpty,
          textCapitalization: TextCapitalization.characters,
          decoration: const InputDecoration(
            contentPadding: EdgeInsets.only(left: 5),
            hintText: '请输入完整的车牌号',
            border: OutlineInputBorder(),
          ),
        ),
      ),
      confirmText: '确认绑定',
      cancelText: source == 0 ? "重新拍摄" : '取消',
      onCancel: () {
        if (source == 0) {
          takePhotoAndRecognize();
        }
      },
      onConfirm: () {
        final plate = controller.text.trim().toUpperCase();
        if (plate.isNotEmpty) {
          bindVehicleByPlate(plate);
        }
      },
    );
  }

  /// 上传图片
  Future<String?> uploadFile(String filePath) async {
    showLoading("正在上传图片...");
    try {
      dio.FormData formData = dio.FormData.fromMap({
        'file': await dio.MultipartFile.fromFile(filePath, filename: 'ocr_plate.jpg'),
      });

      var response = await HttpService.to.post("appointment/ocr/upload", data: formData);
      if (response != null) {
        final result = BaseModel.fromJson(response.data);
        if (result.code == 0) return result.data.toString();
        showErrorToast(result.error);
      }
    } catch (e) {
      showErrorToast("图片上传失败");
    } finally {
      dismissLoading();
    }
    return null;
  }

  /// OCR 识别
  Future<String?> getPlateNumber(String imageUrl) async {
    showLoading("正在识别车牌...");
    try {
      var response = await HttpService.to.get(
        "appointment/ocr/getPlateNumber",
        params: {'imageUrl': imageUrl},
      );
      if (response != null) {
        final result = BaseModel.fromJson(response.data);
        if (result.code == 0) return result.data.toString();
        showErrorToast(result.error);
      }
    } catch (e) {
      showErrorToast("车牌识别失败");
    } finally {
      dismissLoading();
    }
    return null;
  }

  /// 核心绑定方法
  void bindVehicleByPlate(String plateNumber) async {
    showLoading("正在绑定车辆...");
    try {
      var responseData = await HttpService.to.post(
        "appointment/truck/bindOcrTruck",
        data: {"plateNumber": plateNumber, "phone": StorageService.to.phone},
      );

      var result = BaseModel.fromJson(responseData?.data);
      if (result.code == 0 && result.data != null) {
        await StorageService.to.saveVehicleInfo(VehicleInfo.fromJson(result.data));
        dismissLoading();
        showSuccessToast("绑定成功");
        Get.back(result: true);
      } else {
        showErrorToast(result.error);
      }
    } catch (e) {
      showErrorToast("绑定失败，请检查网络");
    } finally {
      dismissLoading();
    }
  }
}