import { Plugin } from "obsidian";
import { TaskWeaverView, VIEW_TYPE_TASKWEAVER } from "./view";
import { TaskWeaverSettingTab } from "./settings";
import { TaskWeaverSettings, DEFAULT_SETTINGS, Task, Category } from "./types";
import { generateUniqueId, logTaskToDailyNote } from "./utils";

export default class TaskWeaverPlugin extends Plugin {
	settings: TaskWeaverSettings;

	async onload(): Promise<void> {
		await this.loadSettings();

		this.registerView(
			VIEW_TYPE_TASKWEAVER,
			(leaf) => new TaskWeaverView(leaf, this)
		);

		this.addRibbonIcon("clock", "Open TaskWeaver", () => {
			this.activateView();
		});

		this.addCommand({
			id: "open-taskweaver",
			name: "Open TaskWeaver",
			callback: () => {
				this.activateView();
			}
		});

		this.addSettingTab(new TaskWeaverSettingTab(this.app, this));

		this.app.workspace.onLayoutReady(() => {
			this.activateView();
		});
	}

	async onunload(): Promise<void> {
		this.app.workspace.detachLeavesOfType(VIEW_TYPE_TASKWEAVER);
	}

	async activateView(): Promise<void> {
		const { workspace } = this.app;

		let leaf = workspace.getLeavesOfType(VIEW_TYPE_TASKWEAVER)[0];

		if (!leaf) {
			const rightLeaf = workspace.getRightLeaf(false);
			if (rightLeaf) {
				await rightLeaf.setViewState({
					type: VIEW_TYPE_TASKWEAVER,
					active: true,
				});
				leaf = rightLeaf;
			}
		}

		if (leaf) {
			workspace.revealLeaf(leaf);
		}
	}

	async loadSettings(): Promise<void> {
		this.settings = Object.assign({}, DEFAULT_SETTINGS, await this.loadData());
	}

	async saveSettings(): Promise<void> {
		await this.saveData(this.settings);
		this.refreshView();
	}

	refreshView(): void {
		const leaves = this.app.workspace.getLeavesOfType(VIEW_TYPE_TASKWEAVER);
		leaves.forEach(leaf => {
			if (leaf.view instanceof TaskWeaverView) {
				leaf.view.render();
			}
		});
	}

	async addCategory(name: string, color: string, emoji?: string): Promise<void> {
		const category: Category = {
			id: generateUniqueId(),
			name,
			color,
			emoji
		};
		this.settings.categories.push(category);
		await this.saveSettings();
	}

	async deleteCategory(categoryId: string): Promise<void> {
		const hasTasks = this.settings.tasks.some(t => t.categoryId === categoryId);
		if (hasTasks) {
			return;
		}

		this.settings.categories = this.settings.categories.filter(c => c.id !== categoryId);
		await this.saveSettings();
	}

	async addTask(title: string, categoryId: string): Promise<void> {
		const task: Task = {
			id: generateUniqueId(),
			title,
			categoryId,
			startTime: null,
			totalElapsed: 0,
			completed: false
		};
		this.settings.tasks.push(task);
		await this.saveSettings();
	}

	async deleteTask(taskId: string): Promise<void> {
		this.settings.tasks = this.settings.tasks.filter(t => t.id !== taskId);
		await this.saveSettings();
	}

	async toggleTaskTimer(taskId: string): Promise<void> {
		const task = this.settings.tasks.find(t => t.id === taskId);
		if (!task) return;

		if (task.startTime) {
			const elapsed = Date.now() - task.startTime;
			task.totalElapsed += elapsed;
			task.startTime = null;
		} else {
			task.startTime = Date.now();
		}

		await this.saveSettings();
	}

	async toggleTaskComplete(taskId: string): Promise<void> {
		const task = this.settings.tasks.find(t => t.id === taskId);
		if (!task) return;

		if (!task.completed) {
			if (task.startTime) {
				const elapsed = Date.now() - task.startTime;
				task.totalElapsed += elapsed;
				task.startTime = null;
			}

			task.completed = true;
			task.completedAt = Date.now();

			if (this.settings.enableDailyNoteLogging) {
				const category = this.settings.categories.find(c => c.id === task.categoryId);
				await logTaskToDailyNote(
					this.app,
					task,
					category,
					this.settings.dailyNoteFormat
				);
			}
		} else {
			task.completed = false;
			delete task.completedAt;
		}

		await this.saveSettings();
	}

	getTaskElapsed(task: Task): number {
		let elapsed = task.totalElapsed;
		if (task.startTime) {
			elapsed += Date.now() - task.startTime;
		}
		return elapsed;
	}
}