import { GetFolderChartIDs, ResolveFolderToCharts, TransposeFolderData } from "./folder";
import deepmerge from "deepmerge";
import db from "external/mongo/db";
import t from "tap";
import ResetDBState from "test-utils/resets";
import { Testing511SPA } from "test-utils/test-data";
import type { ChartDocument, FolderDocument } from "tachi-common";

t.todo("#CreateFolderChartLookup");
t.todo("#GetFolderCharts");

t.test("#ResolveFolderToCharts", (t) => {
	t.beforeEach(ResetDBState);

	t.test("Static Folder Tests", (t) => {
		t.test("Basic Static", async (t) => {
			const mockFolder = {
				game: "iidx",
				playtype: "SP",
				type: "static",
				data: [Testing511SPA.chartID],
			};

			const { charts } = await ResolveFolderToCharts(mockFolder as FolderDocument);

			t.equal(charts.length, 1, "Should return exactly 1 chart.");
			t.equal(charts[0]?.chartID, Testing511SPA.chartID, "Should return 511 [SPA]");

			t.end();
		});

		t.test("Empty Static", async (t) => {
			const mockFolder = {
				game: "iidx",
				playtype: "SP",
				type: "static",
				data: [],
			};

			const { charts } = await ResolveFolderToCharts(mockFolder as unknown as FolderDocument);

			t.equal(charts.length, 0, "Should return exactly 0 charts.");

			t.end();
		});

		t.end();
	});

	t.test("Songs Folder Tests", (t) => {
		t.test("Basic Song Query", async (t) => {
			const mockFolder = {
				game: "iidx",
				playtype: "SP",
				type: "songs",
				data: {
					title: { $regex: /5\.1\.1/u },
				},
			};

			const { charts } = await ResolveFolderToCharts(mockFolder as FolderDocument);

			t.equal(charts.length, 1, "Should return exactly 1 chart.");
			t.equal(charts[0]?.chartID, Testing511SPA.chartID, "Should return 511 [SPA]");
			t.end();
		});

		t.test("Invalid Song Query", async (t) => {
			const mockFolder = {
				game: "iidx",
				playtype: "SP",
				type: "songs",
				data: {
					FieldThatDoesntExist: { $regex: /5\.1\.1/u },
				},
			};

			const { charts } = await ResolveFolderToCharts(mockFolder as unknown as FolderDocument);

			t.equal(charts.length, 0, "Should return exactly 0 charts.");
			t.end();
		});

		t.end();
	});

	t.test("Charts Folder Tests", (t) => {
		t.test("Basic Song Query", async (t) => {
			const mockFolder = {
				game: "iidx",
				playtype: "SP",
				type: "charts",
				data: {
					// lol
					songID: Testing511SPA.songID,
				},
			};

			const { charts } = await ResolveFolderToCharts(mockFolder as FolderDocument);

			t.equal(charts.length, 1, "Should return exactly 1 chart.");
			t.equal(charts[0]?.chartID, Testing511SPA.chartID, "Should return 511 [SPA]");
			t.end();
		});

		t.end();
	});

	t.test("Filter", async (t) => {
		// add fake "NORMAL" 511 chart
		await db.charts.iidx.insert(
			deepmerge(Testing511SPA, {
				difficulty: "NORMAL",
				chartID: "FAKE_511_SPN",
				data: {},
			}) as ChartDocument<"iidx:SP">
		);

		const mockFolder = {
			game: "iidx",
			playtype: "SP",
			type: "charts",
			data: {
				// lol
				songID: Testing511SPA.songID,
			},
		};

		const { charts } = await ResolveFolderToCharts(mockFolder as FolderDocument);

		t.equal(charts.length, 2, "Should return exactly 2 charts.");
		t.strictSame(
			charts.map((e) => e.chartID),
			[Testing511SPA.chartID, "FAKE_511_SPN"],
			"Should return all 511 charts."
		);

		const { charts: charts2 } = await ResolveFolderToCharts(mockFolder as FolderDocument, {
			difficulty: "NORMAL",
		});

		t.equal(charts2.length, 1, "Should return exactly 1 chart.");
		t.equal(charts2[0]?.chartID, "FAKE_511_SPN", "Should only return 511 SPN");

		t.end();
	});

	t.test("Songs", async (t) => {
		const mockFolder = {
			game: "iidx",
			playtype: "SP",
			type: "charts",
			data: {
				// lol
				songID: Testing511SPA.songID,
			},
		};

		const { charts, songs } = await ResolveFolderToCharts(
			mockFolder as FolderDocument,
			{},
			true
		);

		t.equal(charts.length, 1, "Should return exactly 1 chart.");
		t.equal(charts[0]?.chartID, Testing511SPA.chartID, "Should return 511 [SPA]");

		t.equal(songs.length, 1, "Should return exactly 1 song.");
		t.equal(songs[0]?.id, Testing511SPA.songID, "Should return 511's song.");

		t.end();
	});

	t.end();
});

t.test("#GetFolderChartIDs", (t) => {
	t.beforeEach(ResetDBState);

	t.test("Should use the folder-cache", async (t) => {
		await db["folder-chart-lookup"].insert(
			["a", "b", "c", "d"].map((e) => ({ chartID: e, folderID: "folder1" }))
		);

		await db["folder-chart-lookup"].insert(
			["e", "f", "g", "h"].map((e) => ({ chartID: e, folderID: "folder2" }))
		);

		let fcIDs = await GetFolderChartIDs("folder1");

		t.strictSame(fcIDs, ["a", "b", "c", "d"], "Should return the right chartIDs for folder1");

		fcIDs = await GetFolderChartIDs("folder2");

		t.strictSame(fcIDs, ["e", "f", "g", "h"], "Should return the right chartIDs for folder2");

		t.end();
	});

	t.end();
});

t.test("#TransposeFolderData", (t) => {
	t.strictSame(
		TransposeFolderData({
			"foo¬bar": 1,
		}),
		{
			"foo.bar": 1,
		},
		"Should transpose single keys."
	);

	t.strictSame(
		TransposeFolderData({
			"foo¬bar": 1,
			"foo¬baz": 2,
			"foo~bar": 2,
			"foo~baz": 2,
		}),
		{
			"foo.bar": 1,
			"foo.baz": 2,
			foo$bar: 2,
			foo$baz: 2,
		},
		"Should transpose multiple keys."
	);

	t.strictSame(
		TransposeFolderData({
			"foo¬bar¬baz": 1,
			"foo¬bar~baz": 1,
			"foo~bar~baz": 1,
		}),
		{
			"foo.bar$baz": 1,
			"foo.bar.baz": 1,
			foo$bar$baz: 1,
		},
		"Should transpose multiple items in one key."
	);

	t.strictSame(
		TransposeFolderData({
			"foo¬bar~baz": ["a", "b"],
		}),
		{
			"foo.bar$baz": ["a", "b"],
		},
		"Should transpose arrays."
	);

	t.end();
});