using Contime.model;

namespace Contime.view {
    public partial class MainForm : Form {
        // --- Events for the Controller ---
        public event Action WorkdayStartStopClicked;
        public event Action TaskStartStopClicked;
        public event Action GoOutOfContextClicked;
        public event Action ToggleTaskStatusClicked;
        public event Action AddTaskClicked;
        public event Action<long> TaskSelected;
        public event Action SaveContextClicked;
        public event Action ExportClicked;

        // --- Properties for the Controller ---
        public string NewTaskName => txtNewTask.Text;
        public string ContextText { get => txtContext.Text; set => txtContext.Text = value; }

        public MainForm() {
            InitializeComponent();
        }

        // Handles full UI redraws, especially for the task list and summary data
        public void UpdateView(TimeTrackerModel model) {
            this.SuspendLayout();

            UpdateTaskList(model);
            UpdateSummaryStats(model);
            UpdateTimersAndState(model); // Also call the lighter update to ensure consistency

            this.ResumeLayout();
        }

        // Handles high-frequency updates (timers, button states)
        public void UpdateTimersAndState(TimeTrackerModel model) {
            lblWorkdayTimer.Text = model.WorkdayTime.ToString(@"hh\:mm\:ss");
            lblTaskTimer.Text = model.ActiveTaskTime.ToString(@"hh\:mm\:ss");
            lblSelectedTaskTotalTime.Text = model.SelectedTaskTotalTime.ToString(@"hh\:mm\:ss");

            lblStatus.Text = GetStatusText(model.CurrentState);
            lblStatus.ForeColor = GetStatusColor(model.CurrentState);

            lblSelectedTask.Text = model.SelectedTask?.Name ?? "None";

            // --- Update Button States and Text ---
            btnWorkdayStartStop.Text = (model.CurrentState == TimeTrackerModel.AppState.Idle) ? "Start Workday" : "Stop Workday";
            btnWorkdayStartStop.BackColor = (model.CurrentState == TimeTrackerModel.AppState.Idle) ? Color.FromArgb(0, 122, 204) : Color.FromArgb(192, 0, 0);

            btnGoOutOfContext.Enabled = model.CurrentState != TimeTrackerModel.AppState.Idle;
            btnGoOutOfContext.Text = (model.CurrentState == TimeTrackerModel.AppState.OutOfContext) ? "Return to Work" : "Go Out of Context";

            bool taskIsSelectedAndOpen = model.SelectedTask != null && model.SelectedTask.Status == "open";
            bool canStartTask = model.CurrentState == TimeTrackerModel.AppState.WorkdayActive && taskIsSelectedAndOpen;
            btnTaskStartStop.Enabled = canStartTask || model.CurrentState == TimeTrackerModel.AppState.TaskActive;
            btnTaskStartStop.Text = (model.CurrentState == TimeTrackerModel.AppState.TaskActive) ? "Stop Task" : "Start Task";
            btnTaskStartStop.BackColor = (model.CurrentState == TimeTrackerModel.AppState.TaskActive) ? Color.FromArgb(220, 53, 69) : Color.FromArgb(40, 167, 69);

            btnToggleTaskStatus.Enabled = model.SelectedTask != null && model.CurrentState != TimeTrackerModel.AppState.TaskActive;
            btnToggleTaskStatus.Text = model.SelectedTask?.Status == "open" ? "Mark as Finished" : "Re-open Task";

            lstTasks.Enabled = model.CurrentState != TimeTrackerModel.AppState.TaskActive;

            // Show or hide the 'Out of Context' input fields
            bool outOfContext = model.CurrentState == TimeTrackerModel.AppState.OutOfContext;
            txtContext.Visible = outOfContext;
            btnSaveContext.Visible = outOfContext;
            if (outOfContext) ContextText = model.OutOfContextReason;
        }

        private void UpdateSummaryStats(TimeTrackerModel model) {
            lblDayTotal.Text = $"Today: {model.DayTotal:hh\\:mm\\:ss}";
            lblWeekTotal.Text = $"This Week: {model.WeekTotal:hh\\:mm\\:ss}";
        }

        private void LstTasks_SelectedIndexChanged(object sender, EventArgs e) {
            if (lstTasks.SelectedItems.Count > 0)
                TaskSelected?.Invoke((long)lstTasks.SelectedItems[0].Tag);
            else
                TaskSelected?.Invoke(-1);
        }

        private void LstTasks_MouseDoubleClick(object sender, MouseEventArgs e) {
            if (lstTasks.SelectedItems.Count == 1) {
                var selectedItem = lstTasks.SelectedItems[0];
                string taskName = selectedItem.SubItems[0].Text;
                string totalTime = selectedItem.SubItems[1].Text;
                string status = selectedItem.SubItems[2].Text;

                string message = $"Task: {taskName}\nTotal Time: {totalTime}\nStatus: {status}";
                MessageBox.Show(message, "Task Details", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }

        private void UpdateTaskList(TimeTrackerModel model) {
            lstTasks.SelectedIndexChanged -= LstTasks_SelectedIndexChanged; // Unsubscribe to prevent feedback loop

            long? selectedTaskId = model.SelectedTask?.Id;
            lstTasks.Items.Clear();

            foreach (var task in model.Tasks) {
                var item = new ListViewItem(new[] { task.Name, task.ElapsedTime.ToString(@"hh\:mm\:ss"), task.Status }) {
                    Tag = task.Id,
                    ForeColor = task.Status == "closed" ? Color.Gray : Color.White
                };
                lstTasks.Items.Add(item);
                if (task.Id == selectedTaskId) {
                    item.Selected = true;
                }
            }

            lstTasks.SelectedIndexChanged += LstTasks_SelectedIndexChanged; // Re-subscribe
        }

        private string GetStatusText(TimeTrackerModel.AppState state) {
            switch (state) {
                case TimeTrackerModel.AppState.Idle: return "Idle";
                case TimeTrackerModel.AppState.WorkdayActive: return "Workday Active";
                case TimeTrackerModel.AppState.TaskActive: return "Task in Progress";
                case TimeTrackerModel.AppState.OutOfContext: return "Out of Context";
                default: return "Unknown";
            }
        }

        private Color GetStatusColor(TimeTrackerModel.AppState state) {
            switch (state) {
                case TimeTrackerModel.AppState.Idle: return Color.White;
                case TimeTrackerModel.AppState.WorkdayActive: return Color.LightSkyBlue;
                case TimeTrackerModel.AppState.TaskActive: return Color.LightGreen;
                case TimeTrackerModel.AppState.OutOfContext: return Color.Orange;
                default: return Color.White;
            }
        }

        public void ShowNotification(string title, string message) {
            notifyIcon.BalloonTipTitle = title;
            notifyIcon.BalloonTipText = message;
            notifyIcon.ShowBalloonTip(3000);
        }

        private void BtnExport_Click(object sender, EventArgs e) {
            ExportClicked?.Invoke();
        }
    }
}