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/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';

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

  String? selectedProjectId;

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

    WidgetsBinding.instance.addPostFrameCallback((_) {
      if (selectedProjectId != null) {
        controller.fetchEmployeesByProject(selectedProjectId!);
      }
    });
  }

  @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: [
        _infoRow(Icons.location_on, "Work Location",
            "${widget.buildingName} > ${widget.floorName} > ${widget.workAreaName} > ${widget.activityName}"),
        Divider(),
        _infoRow(Icons.pending_actions, "Pending Task of Activity",
            "${widget.pendingTask}"),
        Divider(),
        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),
        Container(
          constraints: const BoxConstraints(maxHeight: 150),
          child: _buildEmployeeList(),
        ),
        MySpacing.height(8),
        _buildSelectedEmployees(),
        _buildTextField(
          icon: Icons.track_changes,
          label: "Target for Today :",
          controller: targetController,
          hintText: "Enter target",
          keyboardType: TextInputType.number,
          validatorType: "target",
        ),
        MySpacing.height(24),
        _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.isLoading.value) {
        // Skeleton loader instead of CircularProgressIndicator
        return ListView.separated(
          shrinkWrap: true,
          itemCount: 5, // show 5 skeleton rows
          separatorBuilder: (_, __) => const SizedBox(height: 4),
          itemBuilder: (context, index) {
            return Padding(
              padding: const EdgeInsets.symmetric(vertical: 2, horizontal: 8),
              child: Row(
                children: [
                  Container(
                    width: 24,
                    height: 24,
                    decoration: BoxDecoration(
                      color: Colors.grey.shade300,
                      borderRadius: BorderRadius.circular(4),
                    ),
                  ),
                  const SizedBox(width: 8),
                  Expanded(
                    child: Container(
                      height: 14,
                      color: Colors.grey.shade300,
                    ),
                  ),
                ],
              ),
            );
          },
        );
      }

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

      if (filteredEmployees.isEmpty) {
        return const Text("No employees found for selected role.");
      }

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

            return Obx(() => Padding(
                  padding: const EdgeInsets.symmetric(vertical: 2),
                  child: Row(
                    children: [
                      Checkbox(
                        shape: RoundedRectangleBorder(
                          borderRadius: BorderRadius.circular(4),
                        ),
                        value: rxBool?.value ?? false,
                        onChanged: (bool? selected) {
                          if (rxBool != null) {
                            rxBool.value = selected ?? false;
                            controller.updateSelectedEmployees();
                          }
                        },
                        fillColor:
                            WidgetStateProperty.resolveWith<Color>((states) {
                          if (states.contains(WidgetState.selected)) {
                            return const Color.fromARGB(255, 95, 132, 255);
                          }
                          return Colors.transparent;
                        }),
                        checkColor: Colors.white,
                        side: const BorderSide(color: Colors.black),
                      ),
                      const SizedBox(width: 8),
                      Expanded(
                          child: Text(employee.name,
                              style: const TextStyle(fontSize: 14))),
                    ],
                  ),
                ));
          },
        ),
      );
    });
  }

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

      return Padding(
        padding: const EdgeInsets.symmetric(vertical: 8.0),
        child: 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: const InputDecoration(
            hintText: '',
            border: OutlineInputBorder(),
          ),
          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 = int.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 be greater than 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,
      description: description,
      taskTeam: selectedTeam,
      assignmentDate: widget.assignmentDate,
    );
  }
}