import {
	Notice,
	Plugin,
	requestUrl,
	TFile,
	type FrontMatterCache,
} from "obsidian";
import {
	type BookTrackerPluginSettings,
	DEFAULT_SETTINGS,
	BookTrackerSettingTab,
} from "@ui/settings";
import { Templater } from "@utils/Templater";
import { CONTENT_TYPE_EXTENSIONS } from "./const";
import { Storage } from "@utils/Storage";
import { ReadingLog } from "@utils/ReadingLog";
import {
	registerReadingLogCodeBlockProcessor,
	registerReadingStatsCodeBlockProcessor,
} from "@ui/code-blocks";
import type { Book, BookMetadata, ReadingState } from "./types";
import { SearchGoodreadsCommand } from "@commands/SearchGoodreadsCommand";
import { LogReadingStartedCommand } from "@commands/LogReadingStartedCommand";
import { LogReadingProgressCommand } from "@commands/LogReadingProgressCommand";
import { LogReadingFinishedCommand } from "@commands/LogReadingFinishedCommand";
import { ResetReadingStatusCommand } from "@commands/ResetReadingStatusCommand";
import { BackupReadingLogCommand } from "@commands/CreateReadingLogBackupCommand";
import { RestoreReadingLogBackupCommand } from "@commands/RestoreReadingLogBackupCommand";
import { Goodreads } from "@data-sources/Goodreads";
import { CreateBookFromGoodreadsUrlCommand } from "@commands/CreateBookFromGoodreadsUrlCommand";
import { registerShelfCodeBlockProcessor } from "@ui/code-blocks/ShelfCodeBlock";
import { ReloadReadingLogCommand } from "@commands/ReloadReadingLogCommand";
import { registerReadingCalendarCodeBlockProcessor } from "@ui/code-blocks/ReadingCalendarCodeBlock";
import { registerAToZChallengeCodeBlockProcessor } from "@ui/code-blocks/AToZChallengeCodeBlock";
import moment from "@external/moment";
import { compressImage } from "@utils/image";

export default class BookTrackerPlugin extends Plugin {
	public settings: BookTrackerPluginSettings;
	public templater: Templater;
	public storage: Storage;
	public readingLog: ReadingLog;
	public goodreads: Goodreads = new Goodreads();

	async onload() {
		await this.loadSettings();

		this.templater = new Templater(this.app);
		this.storage = new Storage(this);
		this.readingLog = new ReadingLog(this.storage);

		this.addCommand(
			new SearchGoodreadsCommand(
				this.app,
				this.goodreads,
				this.createEntry.bind(this)
			)
		);
		this.addCommand(new LogReadingStartedCommand(this.app, this.settings));
		this.addCommand(new LogReadingProgressCommand(this));
		this.addCommand(new LogReadingFinishedCommand(this));
		this.addCommand(
			new ResetReadingStatusCommand(
				this.app,
				this.readingLog,
				this.settings
			)
		);
		this.addCommand(new BackupReadingLogCommand(this.readingLog));
		this.addCommand(
			new RestoreReadingLogBackupCommand(
				this.app,
				this.storage,
				this.readingLog
			)
		);
		this.addCommand(
			new CreateBookFromGoodreadsUrlCommand(
				this.goodreads,
				this.createEntry.bind(this)
			)
		);
		this.addCommand(new ReloadReadingLogCommand(this.readingLog));

		this.addSettingTab(new BookTrackerSettingTab(this));

		registerReadingLogCodeBlockProcessor(this);
		registerReadingStatsCodeBlockProcessor(this);
		registerShelfCodeBlockProcessor(this);
		registerReadingCalendarCodeBlockProcessor(this);
		registerAToZChallengeCodeBlockProcessor(this);
	}

	onunload() {}

	async loadSettings() {
		this.settings = Object.assign(
			{},
			DEFAULT_SETTINGS,
			await this.loadData()
		);
	}

	async saveSettings() {
		await this.saveData(this.settings);
	}

	async downloadCoverImage(
		coverImageUrl: string,
		fileName: string,
		overwrite?: boolean
	): Promise<TFile> {
		const response = await requestUrl(coverImageUrl);
		const contentType = response.headers["content-type"];
		const extension = CONTENT_TYPE_EXTENSIONS[contentType || ""] || "";
		if (extension === "") {
			throw new Error("Unsupported content type: " + contentType);
		}

		let filePath = this.settings.coverFolder + "/";
		if (this.settings.groupCoversByFirstLetter) {
			let groupName = fileName.charAt(0).toUpperCase();
			if (!/^[A-Z]$/.test(groupName)) {
				groupName = "#";
			}

			filePath += groupName + "/";
		}
		filePath += fileName + "." + extension;

		let file = this.app.vault.getFileByPath(filePath);
		if (file) {
			if (this.settings.overwriteExistingCovers || overwrite) {
				await this.app.vault.modifyBinary(file, response.arrayBuffer);
			} else {
				new Notice("Cover image already exists: " + filePath);
				return file;
			}
		} else {
			file = await this.app.vault.createBinary(
				filePath,
				response.arrayBuffer
			);
		}

		await compressImage(this.app, file, {
			height: 400,
			quality: 0.8,
			maintainAspectRatio: true,
		});

		return file;
	}

	async createEntry(book: Book): Promise<void> {
		const fileName = this.templater
			.renderTemplate(this.settings.fileNameFormat, {
				title: book.title,
				authors: book.authors.map((a) => a.name).join(", "),
			})
			.replace(/[/:*?<>|""]/g, "");

		const data: Record<string, unknown> = { book };

		if (this.settings.downloadCovers && book.coverImageUrl) {
			const coverImageFile = await this.downloadCoverImage(
				book.coverImageUrl,
				fileName
			);
			data.coverImagePath = coverImageFile.path;
		}

		const renderedContent = await this.templater.renderTemplateFile(
			this.settings.templateFile,
			data
		);

		const filePath = this.settings.tbrFolder + "/" + fileName + ".md";
		const file = await this.app.vault.create(filePath, renderedContent);
		await this.app.workspace.getLeaf().openFile(file);
	}

	getBookMetadata(file: TFile): BookMetadata | null {
		const metadata = this.app.metadataCache.getFileCache(file);
		if (!metadata) {
			return null;
		}

		return this.frontmatterToMetadata(metadata.frontmatter);
	}

	frontmatterToMetadata(fm: FrontMatterCache | undefined): BookMetadata {
		const getString = (key: string) => {
			const value = fm?.[key];
			if (typeof value === "string") {
				return value;
			}
			return "";
		};

		const getStringArray = (key: string) => {
			const value = fm?.[key];
			if (Array.isArray(value)) {
				return value as string[];
			}
			return [];
		};

		const getNumber = (key: string) => {
			const value = fm?.[key];
			if (typeof value === "number") {
				return value;
			} else if (typeof value === "string") {
				return parseFloat(value);
			}
			return 0;
		};

		const getDate = (key: string) => {
			const value = fm?.[key];
			if (typeof value === "string" || value instanceof Date) {
				return moment(value);
			}
			return null;
		};

		return {
			title: getString(this.settings.titleProperty),
			subtitle: getString(this.settings.subtitleProperty),
			description: getString(this.settings.descriptionProperty),
			authors: getStringArray(this.settings.authorsProperty),
			seriesTitle: getString(this.settings.seriesTitleProperty),
			seriesPosition: getNumber(this.settings.seriesPositionProperty),
			startDate: getDate(this.settings.startDateProperty)!,
			endDate: getDate(this.settings.endDateProperty)!,
			status: getString(this.settings.statusProperty) as ReadingState,
			rating: getNumber(this.settings.ratingProperty),
			spice: getNumber(this.settings.spiceProperty),
			format: getString(this.settings.formatProperty),
			source: getStringArray(this.settings.sourceProperty),
			categories: getStringArray(this.settings.categoriesProperty),
			publisher: getString(this.settings.publisherProperty),
			publishDate: getDate(this.settings.publishDateProperty)!,
			pageCount: getNumber(this.settings.pageCountProperty),
			isbn: getString(this.settings.isbnProperty),
			coverImageUrl: getString(this.settings.coverImageUrlProperty),
			localCoverPath: getString(this.settings.localCoverPathProperty),
		};
	}
}