import { Database } from "bun:sqlite";
import { describe, expect, test } from "bun:test";
import { SCHEMA } from "../../db/schema";
import { buildReviewGroups } from "../review";

function makeDb(): Database {
	const db = new Database(":memory:");
	for (const stmt of SCHEMA.split(";")) {
		const trimmed = stmt.trim();
		if (trimmed) db.run(trimmed);
	}
	return db;
}

interface SeedOpts {
	id: number;
	type: "Movie" | "Episode";
	name?: string;
	seriesName?: string | null;
	seriesJellyfinId?: string | null;
	seasonNumber?: number | null;
	episodeNumber?: number | null;
	autoClass?: "auto" | "auto_heuristic" | "manual" | null;
	sorted?: 0 | 1;
}

function seed(db: Database, opts: SeedOpts) {
	const {
		id,
		type,
		name = `Item ${id}`,
		seriesName = null,
		seriesJellyfinId = null,
		seasonNumber = null,
		episodeNumber = null,
		autoClass = "manual",
		sorted = 1,
	} = opts;
	db
		.prepare(
			"INSERT INTO media_items (id, jellyfin_id, type, name, series_name, series_jellyfin_id, season_number, episode_number, file_path) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)",
		)
		.run(id, `jf-${id}`, type, name, seriesName, seriesJellyfinId, seasonNumber, episodeNumber, `/x/${id}.mkv`);
	db
		.prepare(
			"INSERT INTO review_plans (item_id, status, is_noop, auto_class, sorted, apple_compat, job_type, notes) VALUES (?, 'pending', 0, ?, ?, 'direct_play', 'copy', NULL)",
		)
		.run(id, autoClass, sorted);
}

describe("buildReviewGroups", () => {
	test("returns a complete series with every pending episode", () => {
		const db = makeDb();
		for (let i = 1; i <= 30; i++) {
			seed(db, {
				id: i,
				type: "Episode",
				seriesName: "Breaking Bad",
				seriesJellyfinId: "bb",
				seasonNumber: 1,
				episodeNumber: i,
			});
		}

		const { groups, totalItems } = buildReviewGroups(db, { bucket: "review" });

		expect(groups).toHaveLength(1);
		const series = groups[0];
		expect(series.kind).toBe("series");
		if (series.kind !== "series") throw new Error("expected series");
		expect(series.episodeCount).toBe(30);
		expect(series.seasons).toHaveLength(1);
		expect(series.seasons[0].episodes).toHaveLength(30);
		expect(totalItems).toBe(30);
	});

	test("buckets episodes by season with null ordered last", () => {
		const db = makeDb();
		for (let ep = 1; ep <= 3; ep++) {
			seed(db, {
				id: ep,
				type: "Episode",
				seriesName: "Lost",
				seriesJellyfinId: "lost",
				seasonNumber: 1,
				episodeNumber: ep,
			});
		}
		for (let ep = 1; ep <= 2; ep++) {
			seed(db, {
				id: 10 + ep,
				type: "Episode",
				seriesName: "Lost",
				seriesJellyfinId: "lost",
				seasonNumber: 2,
				episodeNumber: ep,
			});
		}
		seed(db, { id: 99, type: "Episode", seriesName: "Lost", seriesJellyfinId: "lost", seasonNumber: null });

		const { groups } = buildReviewGroups(db, { bucket: "review" });
		expect(groups).toHaveLength(1);
		const lost = groups[0];
		if (lost.kind !== "series") throw new Error("expected series");
		expect(lost.seasons.map((s) => s.season)).toEqual([1, 2, null]);
		expect(lost.seasons[0].episodes).toHaveLength(3);
		expect(lost.seasons[1].episodes).toHaveLength(2);
		expect(lost.seasons[2].episodes).toHaveLength(1);
	});

	test("sorts groups: auto_heuristic (ready) first, then manual, then by name", () => {
		const db = makeDb();
		seed(db, { id: 1, type: "Movie", name: "Zodiac", autoClass: "auto_heuristic" });
		seed(db, { id: 2, type: "Movie", name: "Arrival", autoClass: "manual" });
		seed(db, { id: 3, type: "Movie", name: "Blade Runner", autoClass: "auto_heuristic" });

		const { groups } = buildReviewGroups(db, { bucket: "review" });
		const names = groups.map((g) => (g.kind === "movie" ? g.item.name : g.seriesName));
		expect(names).toEqual(["Blade Runner", "Zodiac", "Arrival"]);
	});

	test("series readyCount counts auto_heuristic episodes", () => {
		const db = makeDb();
		seed(db, {
			id: 1,
			type: "Episode",
			seriesName: "Show",
			seriesJellyfinId: "s",
			seasonNumber: 1,
			episodeNumber: 1,
			autoClass: "auto_heuristic",
		});
		seed(db, {
			id: 2,
			type: "Episode",
			seriesName: "Show",
			seriesJellyfinId: "s",
			seasonNumber: 1,
			episodeNumber: 2,
			autoClass: "manual",
		});

		const { groups } = buildReviewGroups(db, { bucket: "review" });
		if (groups[0].kind !== "series") throw new Error("expected series");
		expect(groups[0].readyCount).toBe(1);
	});

	test("excludes plans that are not pending or are is_noop=1", () => {
		const db = makeDb();
		seed(db, { id: 1, type: "Movie", name: "Pending" });
		seed(db, { id: 2, type: "Movie", name: "Approved" });
		db.prepare("UPDATE review_plans SET status = 'approved' WHERE item_id = ?").run(2);
		seed(db, { id: 3, type: "Movie", name: "Noop" });
		db.prepare("UPDATE review_plans SET is_noop = 1 WHERE item_id = ?").run(3);

		const { groups, totalItems } = buildReviewGroups(db, { bucket: "review" });
		expect(groups).toHaveLength(1);
		expect(totalItems).toBe(1);
		if (groups[0].kind !== "movie") throw new Error("expected movie");
		expect(groups[0].item.name).toBe("Pending");
	});

	test("bucket=inbox returns sorted=0 plans only", () => {
		const db = makeDb();
		seed(db, { id: 1, type: "Movie", name: "Fresh", autoClass: null, sorted: 0 });
		seed(db, { id: 2, type: "Movie", name: "Old", autoClass: "manual", sorted: 1 });

		const inbox = buildReviewGroups(db, { bucket: "inbox" });
		expect(inbox.groups).toHaveLength(1);
		if (inbox.groups[0].kind !== "movie") throw new Error("expected movie");
		expect(inbox.groups[0].item.name).toBe("Fresh");

		const review = buildReviewGroups(db, { bucket: "review" });
		expect(review.groups).toHaveLength(1);
		if (review.groups[0].kind !== "movie") throw new Error("expected movie");
		expect(review.groups[0].item.name).toBe("Old");
	});
});