import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:marco/controller/task_Planning/daily_task_Planning_controller.dart';
import 'package:marco/controller/project_controller.dart';
import 'package:marco/controller/tenant/organization_selection_controller.dart';
import 'package:marco/controller/tenant/service_controller.dart';
import 'package:marco/helpers/widgets/my_spacing.dart';
import 'package:marco/helpers/widgets/my_text.dart';
import 'package:marco/helpers/widgets/my_snackbar.dart';
import 'package:marco/helpers/utils/base_bottom_sheet.dart';
import 'package:marco/helpers/widgets/tenant/organization_selector.dart';
import 'package:marco/helpers/widgets/tenant/service_selector.dart';
import 'package:marco/model/attendance/organization_per_project_list_model.dart';
import 'package:marco/model/tenant/tenant_services_model.dart';

class AssignTaskBottomSheet extends StatefulWidget {
  final String workLocation;
  final String activityName;
  final int pendingTask;
  final String workItemId;
  final DateTime assignmentDate;
  final String buildingName;
  final String floorName;
  final String workAreaName;

  const AssignTaskBottomSheet({
    super.key,
    required this.buildingName,
    required this.workLocation,
    required this.floorName,
    required this.workAreaName,
    required this.activityName,
    required this.pendingTask,
    required this.workItemId,
    required this.assignmentDate,
  });

  @override
  State<AssignTaskBottomSheet> createState() => _AssignTaskBottomSheetState();
}

class _AssignTaskBottomSheetState extends State<AssignTaskBottomSheet> {
  final DailyTaskPlanningController controller = Get.find();
  final ProjectController projectController = Get.find();

  final OrganizationController orgController = Get.put(OrganizationController());
  final ServiceController serviceController = Get.put(ServiceController());

  final TextEditingController targetController = TextEditingController();
  final TextEditingController descriptionController = TextEditingController();
  final ScrollController _employeeListScrollController = ScrollController();

  String? selectedProjectId;
  Organization? selectedOrganization;
  Service? selectedService;

  @override
  void initState() {
    super.initState();
    selectedProjectId = projectController.selectedProjectId.value;

    WidgetsBinding.instance.addPostFrameCallback((_) async {
      if (selectedProjectId != null) {
        await orgController.fetchOrganizations(selectedProjectId!);
        _resetSelections();
        await _fetchEmployeesAndTasks();
      }
    });
  }

  void _resetSelections() {
    controller.selectedEmployees.clear();
    controller.uploadingStates.forEach((key, value) => value.value = false);
  }

  Future<void> _fetchEmployeesAndTasks() async {
    await controller.fetchEmployeesByProjectService(
      projectId: selectedProjectId!,
      serviceId: selectedService?.id,
      organizationId: selectedOrganization?.id,
    );
    await controller.fetchTaskData(selectedProjectId, serviceId: selectedService?.id);
  }

  @override
  void dispose() {
    _employeeListScrollController.dispose();
    targetController.dispose();
    descriptionController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Obx(() => BaseBottomSheet(
          title: "Assign Task",
          child: _buildAssignTaskForm(),
          onCancel: () => Get.back(),
          onSubmit: _onAssignTaskPressed,
          isSubmitting: controller.isAssigningTask.value,
        ));
  }

  Widget _buildAssignTaskForm() {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        // Organization Selector
        SizedBox(
          height: 50,
          child: OrganizationSelector(
            controller: orgController,
            onSelectionChanged: (org) async {
              setState(() => selectedOrganization = org);
              _resetSelections();
              if (selectedProjectId != null) await _fetchEmployeesAndTasks();
            },
          ),
        ),
        MySpacing.height(12),

        // Service Selector
        SizedBox(
          height: 50,
          child: ServiceSelector(
            controller: serviceController,
            onSelectionChanged: (service) async {
              setState(() => selectedService = service);
              _resetSelections();
              if (selectedProjectId != null) await _fetchEmployeesAndTasks();
            },
          ),
        ),
        MySpacing.height(16),

        // Work Location Info
        _infoRow(
          Icons.location_on,
          "Work Location",
          "${widget.buildingName} > ${widget.floorName} > ${widget.workAreaName} > ${widget.activityName}",
        ),
        const Divider(),

        // Pending Task Info
        _infoRow(Icons.pending_actions, "Pending Task", "${widget.pendingTask}"),
        const Divider(),

        // Role Selector
        GestureDetector(
          onTap: _onRoleMenuPressed,
          child: Row(
            children: [
              MyText.titleMedium("Select Team :", fontWeight: 600),
              const SizedBox(width: 4),
              const Icon(Icons.tune, color: Color.fromARGB(255, 95, 132, 255)),
            ],
          ),
        ),
        MySpacing.height(8),

        // Employee List
        Container(
          constraints: const BoxConstraints(maxHeight: 180),
          decoration: BoxDecoration(
            border: Border.all(color: Colors.grey.shade300),
            borderRadius: BorderRadius.circular(6),
          ),
          child: _buildEmployeeList(),
        ),
        MySpacing.height(8),

        // Selected Employees Chips
        _buildSelectedEmployees(),
        MySpacing.height(8),

        // Target Input
        _buildTextField(
          icon: Icons.track_changes,
          label: "Target for Today :",
          controller: targetController,
          hintText: "Enter target",
          keyboardType: const TextInputType.numberWithOptions(decimal: true),
          validatorType: "target",
        ),
        MySpacing.height(16),

        // Description Input
        _buildTextField(
          icon: Icons.description,
          label: "Description :",
          controller: descriptionController,
          hintText: "Enter task description",
          maxLines: 3,
          validatorType: "description",
        ),
      ],
    );
  }

  void _onRoleMenuPressed() {
    final RenderBox overlay = Overlay.of(context).context.findRenderObject() as RenderBox;
    final Size screenSize = overlay.size;

    showMenu(
      context: context,
      position: RelativeRect.fromLTRB(
        screenSize.width / 2 - 100,
        screenSize.height / 2 - 20,
        screenSize.width / 2 - 100,
        screenSize.height / 2 - 20,
      ),
      items: [
        const PopupMenuItem(value: 'all', child: Text("All Roles")),
        ...controller.roles.map((role) {
          return PopupMenuItem(
            value: role['id'].toString(),
            child: Text(role['name'] ?? 'Unknown Role'),
          );
        }),
      ],
    ).then((value) {
      if (value != null) controller.onRoleSelected(value == 'all' ? null : value);
    });
  }

  Widget _buildEmployeeList() {
    return Obx(() {
      if (controller.isFetchingEmployees.value) {
        return Center(child: CircularProgressIndicator());
      }

      final filteredEmployees = controller.selectedRoleId.value == null
          ? controller.employees
          : controller.employees
              .where((e) => e.jobRoleID.toString() == controller.selectedRoleId.value)
              .toList();

      if (filteredEmployees.isEmpty) {
        return Center(child: Text("No employees available for selected role."));
      }

      return Scrollbar(
        controller: _employeeListScrollController,
        thumbVisibility: true,
        child: ListView.builder(
          controller: _employeeListScrollController,
          itemCount: filteredEmployees.length,
          itemBuilder: (context, index) {
            final employee = filteredEmployees[index];
            final rxBool = controller.uploadingStates[employee.id];

            return Obx(() => ListTile(
                  dense: true,
                  contentPadding: const EdgeInsets.symmetric(horizontal: 8),
                  leading: Checkbox(
                    shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(4)),
                    value: rxBool?.value ?? false,
                    onChanged: (selected) {
                      if (rxBool != null) {
                        rxBool.value = selected ?? false;
                        controller.updateSelectedEmployees();
                      }
                    },
                    fillColor: MaterialStateProperty.resolveWith((states) =>
                        states.contains(MaterialState.selected)
                            ? const Color.fromARGB(255, 95, 132, 255)
                            : Colors.transparent),
                    checkColor: Colors.white,
                    side: const BorderSide(color: Colors.black),
                  ),
                  title: Text(employee.name, style: const TextStyle(fontSize: 14)),
                  visualDensity: VisualDensity.compact,
                ));
          },
        ),
      );
    });
  }

  Widget _buildSelectedEmployees() {
    return Obx(() {
      if (controller.selectedEmployees.isEmpty) return Container();

      return Wrap(
        spacing: 4,
        runSpacing: 4,
        children: controller.selectedEmployees.map((e) {
          return Obx(() {
            final isSelected = controller.uploadingStates[e.id]?.value ?? false;
            if (!isSelected) return Container();

            return Chip(
              label: Text(e.name, style: const TextStyle(color: Colors.white)),
              backgroundColor: const Color.fromARGB(255, 95, 132, 255),
              deleteIcon: const Icon(Icons.close, color: Colors.white),
              onDeleted: () {
                controller.uploadingStates[e.id]?.value = false;
                controller.updateSelectedEmployees();
              },
            );
          });
        }).toList(),
      );
    });
  }

  Widget _buildTextField({
    required IconData icon,
    required String label,
    required TextEditingController controller,
    required String hintText,
    TextInputType keyboardType = TextInputType.text,
    int maxLines = 1,
    required String validatorType,
  }) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Row(children: [
          Icon(icon, size: 18, color: Colors.black54),
          const SizedBox(width: 6),
          MyText.titleMedium(label, fontWeight: 600),
        ]),
        MySpacing.height(6),
        TextFormField(
          controller: controller,
          keyboardType: keyboardType,
          maxLines: maxLines,
          decoration: InputDecoration(
            hintText: hintText,
            border: OutlineInputBorder(borderRadius: BorderRadius.circular(6)),
            contentPadding: const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
          ),
          validator: (value) => this.controller.formFieldValidator(value, fieldType: validatorType),
        ),
      ],
    );
  }

  Widget _infoRow(IconData icon, String title, String value) {
    return Padding(
      padding: MySpacing.y(6),
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Icon(icon, size: 20, color: Colors.grey[700]),
          const SizedBox(width: 8),
          Expanded(
            child: RichText(
              text: TextSpan(
                children: [
                  WidgetSpan(
                    child: MyText.titleMedium("$title: ", fontWeight: 600, color: Colors.black),
                  ),
                  TextSpan(text: value, style: const TextStyle(color: Colors.black)),
                ],
              ),
            ),
          ),
        ],
      ),
    );
  }

  void _onAssignTaskPressed() {
    final selectedTeam = controller.uploadingStates.entries
        .where((e) => e.value.value)
        .map((e) => e.key)
        .toList();

    if (selectedTeam.isEmpty) {
      showAppSnackbar(title: "Team Required", message: "Please select at least one team member", type: SnackbarType.error);
      return;
    }

    final target = double.tryParse(targetController.text.trim());
    if (target == null || target <= 0) {
      showAppSnackbar(title: "Invalid Input", message: "Please enter a valid target number", type: SnackbarType.error);
      return;
    }

    if (target > widget.pendingTask) {
      showAppSnackbar(
        title: "Target Too High",
        message: "Target cannot exceed pending task (${widget.pendingTask})",
        type: SnackbarType.error,
      );
      return;
    }

    final description = descriptionController.text.trim();
    if (description.isEmpty) {
      showAppSnackbar(title: "Description Required", message: "Please enter a description", type: SnackbarType.error);
      return;
    }

    controller.assignDailyTask(
      workItemId: widget.workItemId,
      plannedTask: target.toInt(),
      description: description,
      taskTeam: selectedTeam,
      assignmentDate: widget.assignmentDate,
      organizationId: selectedOrganization?.id,
      serviceId: selectedService?.id,
    );
  }
}