import { describe, expect, it, jest } from "@jest/globals";
import { MaintenanceWindowService } from "../../../src/service/business/maintenanceWindowService.ts";
import type { IMaintenanceWindowsRepository } from "../../../src/repositories/maintenance-windows/IMaintenanceWindowsRepository.ts";
import type { IMonitorsRepository } from "../../../src/repositories/monitors/IMonitorsRepository.ts";
import type { MaintenanceWindow } from "../../../src/types/index.ts";

// ── Helpers ──────────────────────────────────────────────────────────────────

const createMaintenanceWindowsRepo = () =>
	({
		create: jest.fn().mockResolvedValue(makeWindow()),
		findById: jest.fn().mockResolvedValue(makeWindow()),
		findByMonitorId: jest.fn().mockResolvedValue([makeWindow()]),
		findByTeamId: jest.fn().mockResolvedValue([makeWindow()]),
		updateById: jest.fn().mockResolvedValue(makeWindow()),
		deleteById: jest.fn().mockResolvedValue(makeWindow()),
		countByTeamId: jest.fn().mockResolvedValue(1),
	}) as unknown as jest.Mocked<IMaintenanceWindowsRepository>;

const createMonitorsRepo = () =>
	({
		findByIds: jest.fn().mockResolvedValue([
			{ id: "mon-1", teamId: "team-1" },
			{ id: "mon-2", teamId: "team-1" },
		]),
	}) as unknown as jest.Mocked<IMonitorsRepository>;

const createService = (overrides?: {
	monitorsRepository?: ReturnType<typeof createMonitorsRepo>;
	maintenanceWindowsRepository?: ReturnType<typeof createMaintenanceWindowsRepo>;
}) => {
	const monitorsRepository = overrides?.monitorsRepository ?? createMonitorsRepo();
	const maintenanceWindowsRepository = overrides?.maintenanceWindowsRepository ?? createMaintenanceWindowsRepo();
	const service = new MaintenanceWindowService({ monitorsRepository, maintenanceWindowsRepository });
	return { service, monitorsRepository, maintenanceWindowsRepository };
};

const makeWindow = (overrides?: Partial<MaintenanceWindow>): MaintenanceWindow => ({
	id: "mw-1",
	monitorId: "mon-1",
	teamId: "team-1",
	active: true,
	name: "Scheduled Maintenance",
	duration: 60,
	durationUnit: "minutes",
	repeat: 0,
	start: "2026-04-10T02:00:00Z",
	end: "2026-04-10T03:00:00Z",
	createdAt: "2026-01-01T00:00:00Z",
	updatedAt: "2026-01-01T00:00:00Z",
	...overrides,
});

const defaultCreateParams = {
	teamId: "team-1",
	monitorIDs: ["mon-1", "mon-2"],
	name: "Scheduled Maintenance",
	active: true,
	duration: 60,
	durationUnit: "minutes" as const,
	repeat: 0,
	start: "2026-04-10T02:00:00Z",
	end: "2026-04-10T03:00:00Z",
};

// ── Tests ────────────────────────────────────────────────────────────────────

describe("MaintenanceWindowService", () => {
	describe("serviceName", () => {
		it("returns maintenanceWindowService from static property", () => {
			expect(MaintenanceWindowService.SERVICE_NAME).toBe("maintenanceWindowService");
		});

		it("returns maintenanceWindowService from instance getter", () => {
			const { service } = createService();
			expect(service.serviceName).toBe("maintenanceWindowService");
		});
	});

	// ── createMaintenanceWindow ──────────────────────────────────────────────

	describe("createMaintenanceWindow", () => {
		it("creates a maintenance window for each monitor", async () => {
			const { service, maintenanceWindowsRepository } = createService();

			await service.createMaintenanceWindow(defaultCreateParams);

			expect(maintenanceWindowsRepository.create).toHaveBeenCalledTimes(2);
			expect(maintenanceWindowsRepository.create).toHaveBeenCalledWith(
				expect.objectContaining({
					teamId: "team-1",
					monitorId: "mon-1",
					name: "Scheduled Maintenance",
					active: true,
					duration: 60,
					durationUnit: "minutes",
					repeat: 0,
					start: "2026-04-10T02:00:00Z",
					end: "2026-04-10T03:00:00Z",
				})
			);
			expect(maintenanceWindowsRepository.create).toHaveBeenCalledWith(expect.objectContaining({ monitorId: "mon-2" }));
		});

		it("verifies monitor ownership via findByIds", async () => {
			const { service, monitorsRepository } = createService();

			await service.createMaintenanceWindow(defaultCreateParams);

			expect(monitorsRepository.findByIds).toHaveBeenCalledWith(["mon-1", "mon-2"]);
		});

		it("throws 403 when a monitor belongs to a different team", async () => {
			const monitorsRepository = createMonitorsRepo();
			(monitorsRepository.findByIds as jest.Mock).mockResolvedValue([
				{ id: "mon-1", teamId: "team-1" },
				{ id: "mon-2", teamId: "team-other" },
			]);
			const { service, maintenanceWindowsRepository } = createService({ monitorsRepository });

			await expect(service.createMaintenanceWindow(defaultCreateParams)).rejects.toThrow(
				"Unauthorized to create maintenance window for one or more monitors"
			);
			expect(maintenanceWindowsRepository.create).not.toHaveBeenCalled();
		});

		it("does not throw when all monitors belong to the team", async () => {
			const { service } = createService();

			await expect(service.createMaintenanceWindow(defaultCreateParams)).resolves.toBeUndefined();
		});

		it("creates a single window when monitorIDs has one entry", async () => {
			const { service, maintenanceWindowsRepository } = createService();

			await service.createMaintenanceWindow({ ...defaultCreateParams, monitorIDs: ["mon-1"] });

			expect(maintenanceWindowsRepository.create).toHaveBeenCalledTimes(1);
		});
	});

	// ── getMaintenanceWindowById ─────────────────────────────────────────────

	describe("getMaintenanceWindowById", () => {
		it("delegates to repository with id and teamId", async () => {
			const expected = makeWindow();
			const { service, maintenanceWindowsRepository } = createService();
			(maintenanceWindowsRepository.findById as jest.Mock).mockResolvedValue(expected);

			const result = await service.getMaintenanceWindowById({ id: "mw-1", teamId: "team-1" });

			expect(result).toBe(expected);
			expect(maintenanceWindowsRepository.findById).toHaveBeenCalledWith("mw-1", "team-1");
		});
	});

	// ── getMaintenanceWindowsByTeamId ────────────────────────────────────────

	describe("getMaintenanceWindowsByTeamId", () => {
		it("returns windows and count", async () => {
			const windows = [makeWindow()];
			const { service, maintenanceWindowsRepository } = createService();
			(maintenanceWindowsRepository.findByTeamId as jest.Mock).mockResolvedValue(windows);
			(maintenanceWindowsRepository.countByTeamId as jest.Mock).mockResolvedValue(1);

			const result = await service.getMaintenanceWindowsByTeamId({ teamId: "team-1" });

			expect(result).toEqual({ maintenanceWindows: windows, maintenanceWindowCount: 1 });
		});

		it("defaults page to 0 and rowsPerPage to 10 when not provided", async () => {
			const { service, maintenanceWindowsRepository } = createService();

			await service.getMaintenanceWindowsByTeamId({ teamId: "team-1" });

			expect(maintenanceWindowsRepository.findByTeamId).toHaveBeenCalledWith("team-1", 0, 10, undefined, undefined, undefined);
		});

		it("passes pagination and filter parameters through", async () => {
			const { service, maintenanceWindowsRepository } = createService();

			await service.getMaintenanceWindowsByTeamId({
				teamId: "team-1",
				active: true,
				page: 2,
				rowsPerPage: 5,
				field: "name",
				order: "asc",
			});

			expect(maintenanceWindowsRepository.findByTeamId).toHaveBeenCalledWith("team-1", 2, 5, "name", "asc", true);
			expect(maintenanceWindowsRepository.countByTeamId).toHaveBeenCalledWith("team-1", true);
		});
	});

	// ── getMaintenanceWindowsByMonitorId ─────────────────────────────────────

	describe("getMaintenanceWindowsByMonitorId", () => {
		it("delegates to repository with monitorId and teamId", async () => {
			const windows = [makeWindow()];
			const { service, maintenanceWindowsRepository } = createService();
			(maintenanceWindowsRepository.findByMonitorId as jest.Mock).mockResolvedValue(windows);

			const result = await service.getMaintenanceWindowsByMonitorId({ monitorId: "mon-1", teamId: "team-1" });

			expect(result).toBe(windows);
			expect(maintenanceWindowsRepository.findByMonitorId).toHaveBeenCalledWith("mon-1", "team-1");
		});
	});

	// ── deleteMaintenanceWindow ──────────────────────────────────────────────

	describe("deleteMaintenanceWindow", () => {
		it("delegates to repository and returns deleted window", async () => {
			const deleted = makeWindow();
			const { service, maintenanceWindowsRepository } = createService();
			(maintenanceWindowsRepository.deleteById as jest.Mock).mockResolvedValue(deleted);

			const result = await service.deleteMaintenanceWindow({ id: "mw-1", teamId: "team-1" });

			expect(result).toBe(deleted);
			expect(maintenanceWindowsRepository.deleteById).toHaveBeenCalledWith("mw-1", "team-1");
		});
	});

	// ── editMaintenanceWindow ────────────────────────────────────────────────

	describe("editMaintenanceWindow", () => {
		it("delegates to repository with id, teamId, and body", async () => {
			const updated = makeWindow({ name: "Updated Name" });
			const { service, maintenanceWindowsRepository } = createService();
			(maintenanceWindowsRepository.updateById as jest.Mock).mockResolvedValue(updated);

			const result = await service.editMaintenanceWindow({ id: "mw-1", teamId: "team-1", body: { name: "Updated Name" } });

			expect(result).toBe(updated);
			expect(maintenanceWindowsRepository.updateById).toHaveBeenCalledWith("mw-1", "team-1", { name: "Updated Name" });
		});

		it("passes partial body fields through", async () => {
			const { service, maintenanceWindowsRepository } = createService();

			await service.editMaintenanceWindow({
				id: "mw-1",
				teamId: "team-1",
				body: { active: false, repeat: 3600000 },
			});

			expect(maintenanceWindowsRepository.updateById).toHaveBeenCalledWith("mw-1", "team-1", { active: false, repeat: 3600000 });
		});
	});
});