using Contime.data;
using Contime.model;
using Contime.view;

namespace Contime.controller {
    public class TimeTrackerController {
        private readonly TimeTrackerModel _model;
        private readonly MainForm _view;
        private readonly System.Windows.Forms.Timer _timer;

        private const int IDLE_NOTIFICATION_MINUTES = 15;
        private const int ACTIVE_TASK_NOTIFICATION_MINUTES = 60;

        private bool _idleNotificationSent = false;
        private bool _activeTaskNotificationSent = false;

        public TimeTrackerController(TimeTrackerModel model, MainForm view) {
            _model = model;
            _view = view;

            // Subscribe to model and view events
            _model.StateChanged += OnModelStateChanged;
            _model.MajorStateChanged += OnModelMajorStateChanged;

            _view.WorkdayStartStopClicked += () => _model.StartStopWorkday();
            _view.TaskStartStopClicked += () => _model.StartStopTask();
            _view.GoOutOfContextClicked += () => _model.SwitchContext();
            _view.ToggleTaskStatusClicked += () => _model.ToggleSelectedTaskStatus();
            _view.AddTaskClicked += () => _model.AddTask(_view.NewTaskName);
            _view.TaskSelected += (taskId) => _model.SelectTask(taskId);
            _view.SaveContextClicked += () => _model.OutOfContextReason = _view.ContextText;
            _view.ExportClicked += OnExportClicked;

            // Setup the main timer
            _timer = new System.Windows.Forms.Timer { Interval = 1000 };
            _timer.Tick += OnTimerTick;

            // Initial UI update
            _view.UpdateView(_model);
        }

        private void OnTimerTick(object sender, EventArgs e) {
            if (_model.CurrentState == TimeTrackerModel.AppState.Idle) {
                _timer.Stop();
                return;
            }

            _view.UpdateTimersAndState(_model);
            CheckNotifications();
        }

        private void OnModelStateChanged() {
            if (_model.CurrentState != TimeTrackerModel.AppState.Idle && !_timer.Enabled) {
                _timer.Start();
            }
            _view.UpdateTimersAndState(_model);

            // Reset notification flags on state change
            _idleNotificationSent = false;
            _activeTaskNotificationSent = false;
        }

        private void OnModelMajorStateChanged() {
            // A major state change might require starting the timer (e.g., starting the workday)
            if (_model.CurrentState != TimeTrackerModel.AppState.Idle && !_timer.Enabled) {
                _timer.Start();
            }

            // This event is for when the task list needs a full refresh
            _view.UpdateView(_model);
        }

        private void CheckNotifications() {
            // Notification for being idle (workday active, no task)
            if (_model.CurrentState == TimeTrackerModel.AppState.WorkdayActive &&
                _model.IdleTime.TotalMinutes >= IDLE_NOTIFICATION_MINUTES &&
                !_idleNotificationSent) {
                _view.ShowNotification("Task Reminder", "You've been idle for over 15 minutes. Remember to select a task.");
                _idleNotificationSent = true;
            }

            // Notification for a long-running task
            if (_model.CurrentState == TimeTrackerModel.AppState.TaskActive &&
                _model.ActiveTaskTime.TotalMinutes >= ACTIVE_TASK_NOTIFICATION_MINUTES &&
                !_activeTaskNotificationSent) {
                _view.ShowNotification("Task Check-in", $"The current task has been running for over an hour. Still on it?");
                _activeTaskNotificationSent = true;
            }
        }

        private void OnExportClicked() {
            using (var sfd = new SaveFileDialog()) {
                sfd.Filter = "Excel Workbook|*.xlsx";
                sfd.ValidateNames = true;
                sfd.FileName = $"Contime_Report_{DateTime.Now:yyyy-MM-dd}.xlsx";

                if (sfd.ShowDialog() == DialogResult.OK) {
                    try {
                        var exporter = new ExcelExporter(_model.DataAccess);
                        exporter.Export(sfd.FileName);
                        _view.ShowNotification("Export Successful", $"Report saved to {sfd.FileName}");
                    }
                    catch (Exception ex) {
                        MessageBox.Show($"An error occurred during export: {ex.Message}", "Export Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    }
                }
            }
        }
    }
}