import { Backend, TaskData } from "Backend.slint";
import { Button, VerticalBox, CheckBox, ScrollView, ComboBox } from "std-widgets.slint";
import { SideBar } from "SideBar.slint";
import { TaskLine } from "TaskLine.slint";
import { EventGroup } from "EventGroup.slint";
import { VPopupIconMenu, VDatePicker, VTimePicker, VCheckBox, VButton, VTag, VText, VTextInput, Palette } from "@vynui";
import { NewTaskData, SaveTaskData } from "Backend.slint";

export component MainView inherits Rectangle {

	background: Palette.background;
	private property<image> icon-visible: @image-url("./images/visible.png");
	private property<image> icon-not-visible: @image-url("./images/not-visible.png");
	private property<bool> completed-tasks-visible: false;

	pure function formatZeroPadding(number: int) -> string {
		if (number < 10) {
			return "0\{number}";
		}
		return number;
	}

	VerticalLayout {
		horizontal-stretch: 1;
		padding: 16px;
		spacing: 16px;
		alignment: start;
		HorizontalLayout {
			horizontal-stretch: 1;
			alignment: start;
			spacing: 8px;
			VButton {
				text: "New task";
				clicked => { Backend.open_new_task_form({
					eventSourceId: -1,
					eventId: -1,
				})}
				icon-source: @image-url("./images/add.png");
				icon-colorize: Colors.greenyellow;
			}
			
			VButton {
				text: "New event";
				clicked => { Backend.open_new_event_form() }
				icon-source: @image-url("./images/add.png");
				icon-colorize: Colors.greenyellow;
			}
			VButton {
				text: "Show/Hide completed tasks";
				clicked => {
					Backend.toggle_show_completed_tasks();
					completed-tasks-visible = !completed-tasks-visible;
				}
				icon-source: completed-tasks-visible ? icon-visible : icon-not-visible;
				icon-colorize: Palette.control-foreground;
			}
		}
		Rectangle {
			horizontal-stretch: 1;
			background: Palette.background.brighter(0.2);
			height: 1px;
		}

		Rectangle {
			border-color: newTaskTitleInput.text != "" ? Palette.card-background : transparent;
			border-width: newTaskTitleInput.text != "" ? 4px : 0px;
			border-radius: newTaskTitleInput.text != "" ? 8px : 0px;
			animate border-color, border-width {
				duration: 250ms;
			}
			VerticalLayout {
				in-out property <int> task-or-event: 1;
				spacing: 8px;
				padding: newTaskTitleInput.text != "" ? 16px : 0px;
				animate padding {
					duration: 250ms;
				}
				Rectangle {
					min-height: 0px;
					max-height: newTaskTitleInput.text != "" ? 512px : 0px;
					opacity: newTaskTitleInput.text != "" ? 1 : 0;
					clip: true;
					animate max-height, opacity {
						 duration: 250ms;
					}
					
					HorizontalLayout {
						alignment: start;
						spacing: 8px;
						VerticalLayout {
							alignment: end;
							VButton {
								text: task-or-event == 1 ? "Task" : "Event";
								clicked => { task-or-event = task-or-event == 1 ? 0 : 1 }
							}
						}
						VText { text: "for"; vertical-alignment: bottom;}
						VerticalLayout {
							alignment: end;
							sourceInput := ComboBox {
								model: Backend.sources; 
							}
						}
						VText { text: "on"; vertical-alignment: bottom;}
						taskDateInput := VDatePicker {
							label: "Date";
							enabled: true;
						}
						HorizontalLayout {
							visible: task-or-event == 0;
							HorizontalLayout {
								spacing: 4px;
								VText { text: "between"; vertical-alignment: bottom; }
								eventStartTimeInput := VTimePicker {
									label: "Starts at";
								}
								VText { text: "and"; vertical-alignment: bottom; }
								eventEndTimeInput := VTimePicker {
									label: "Ends at";
								}
							}
						}
						
					}
				}
				newTaskTitleInput := VTextInput {
					placeholder: "Add new Task / Event";
					accepted => { 
						if (task-or-event == 1) {
							Backend.createTask({
								sourceId: sourceInput.current-index,
								eventId: -1,
								title: newTaskTitleInput.text,
								scheduled: taskDateInput.date.year != 0,
								date: taskDateInput.date
							})
						} else {
							Backend.createEvent({
								sourceId: sourceInput.current-index,
								title: newTaskTitleInput.text,
								date: taskDateInput.date,
								startsAt: eventStartTimeInput.time,
								endsAt: eventEndTimeInput.time,
							});
						}
						newTaskTitleInput.text = "";
					}
				}
			}
		}
		
		Flickable {
			horizontal-stretch: 1;
			VerticalLayout {
				alignment: start;
				spacing: 16px;
				if Backend.visible_tasks.length == 0 : VText {
					text: "There is no task to show";
					horizontal-alignment: center;
				}
				for day[dayIndex] in Backend.visible_tasks: VerticalLayout {
					Rectangle {
						background: Palette.card-background;
						border-radius: 8px;
						VerticalLayout {
							padding: 16px;
							HorizontalLayout {
								alignment: start;
								VText {
									text: Backend.formatDate(day.date);
									color: day.isLate ? Palette.orange : Palette.foreground;
									font-size: 1.2rem;
								}
								VerticalLayout {
									alignment: center;
									VText {
										text: day.relativeDaysDiff == 0 ? "  -  today" :
											day.relativeDaysDiff == 1 ? "  -  tomorrow" :
											day.relativeDaysDiff == -1 ? "  -  yesterday" :
											day.relativeDaysDiff > 0 ? "  -  in \{day.relativeDaysDiff} days" :
											"  -  \{-day.relativeDaysDiff} days ago";
										color: Palette.foreground-hint;
										font-size: 1rem;
									}
								}
							}
							for event[eventIndex] in day.events: VerticalLayout {
								padding-top: 16px;
								EventGroup {
									event: event;
								}
							}
							for task[taskIndex] in day.tasks: VerticalLayout {
								padding-top: taskIndex == 0 ? 16px : 0px;
								padding-bottom: 8px;
								TaskLine {
									task: task;
									source-index: task.sourceId;
									task-index: task.id;
								}
							}
						}
					}
				}
				if Backend.unscheduled-tasks.length > 0 : VerticalLayout {
					Rectangle {
						background: Palette.card-background;
						border-radius: 8px;
						VerticalLayout {
							padding: 16px;
							HorizontalLayout {
								alignment: start;
								VText {
									text: "Unscheduled";
									color: Palette.foreground;
									font-size: 1.2rem;
								}
							}
							for task[taskIndex] in Backend.unscheduled-tasks: VerticalLayout {
								padding-top: taskIndex == 0 ? 16px : 0px;
								padding-bottom: 8px;
								TaskLine {
									task: task;
									source-index: task.sourceId;
									task-index: task.id;
								}
							}
						}
					}
				}
			}
		}
	}
}