const LogReaderService = require("../../../../src/services/logReader");

// Mock the LogReaderService
jest.mock("../../../../src/services/logReader");

describe("LogViewerScreen - Search and Filtering", () => {
	let mockLogReader;
	let mockPaginatedData;

	beforeEach(() => {
		jest.clearAllMocks();

		// Setup mock data with various entry types for testing
		mockPaginatedData = {
			entries: [
				{
					id: "entry_1",
					type: "operation_start",
					timestamp: new Date("2025-08-06T20:30:00Z"),
					level: "INFO",
					message: "Price Update Operation Started",
					title: "Price Update Operation",
					details: "Target Tag: summer-sale\nPrice Adjustment: -10%",
					configuration: {
						"Target Tag": "summer-sale",
						"Price Adjustment": "-10%",
					},
				},
				{
					id: "entry_2",
					type: "product_update",
					timestamp: new Date("2025-08-06T20:30:30Z"),
					level: "SUCCESS",
					message: "Updated The Hidden Snowboard",
					title: "Product Update: The Hidden Snowboard",
					details:
						"Product ID: gid://shopify/Product/8116504920355\nPrice: $749.99 → $674.99",
					productTitle: "The Hidden Snowboard",
					productId: "gid://shopify/Product/8116504920355",
				},
				{
					id: "entry_3",
					type: "error",
					timestamp: new Date("2025-08-06T20:31:00Z"),
					level: "ERROR",
					message: "Failed to update Product XYZ",
					title: "Error: Product XYZ",
					details: "Product ID: xyz123\nError: Rate limit exceeded",
					productTitle: "Product XYZ",
					productId: "xyz123",
				},
				{
					id: "entry_4",
					type: "rollback",
					timestamp: new Date(),
					level: "INFO",
					message: "Rollback Operation Started",
					title: "Rollback Operation",
					details: "Rolling back previous changes",
					configuration: { "Operation Mode": "rollback" },
				},
			],
			pagination: {
				currentPage: 0,
				pageSize: 10,
				totalEntries: 4,
				totalPages: 1,
				hasNextPage: false,
				hasPreviousPage: false,
				startIndex: 1,
				endIndex: 4,
			},
			filters: {
				levelFilter: "ALL",
				searchTerm: "",
			},
		};

		// Setup LogReaderService mock
		mockLogReader = {
			getPaginatedEntries: jest.fn().mockResolvedValue(mockPaginatedData),
			getLogStatistics: jest.fn().mockResolvedValue({}),
			clearCache: jest.fn(),
			watchFile: jest.fn().mockReturnValue(() => {}),
		};

		LogReaderService.mockImplementation(() => mockLogReader);
	});

	describe("Level Filtering", () => {
		test("supports filtering by ERROR level", async () => {
			const errorOnlyData = {
				...mockPaginatedData,
				entries: mockPaginatedData.entries.filter((e) => e.level === "ERROR"),
				filters: { ...mockPaginatedData.filters, levelFilter: "ERROR" },
			};

			mockLogReader.getPaginatedEntries.mockResolvedValue(errorOnlyData);

			const logReader = new LogReaderService();
			const result = await logReader.getPaginatedEntries({
				levelFilter: "ERROR",
			});

			expect(mockLogReader.getPaginatedEntries).toHaveBeenCalledWith(
				expect.objectContaining({ levelFilter: "ERROR" })
			);
			expect(result.filters.levelFilter).toBe("ERROR");
		});

		test("supports filtering by SUCCESS level", async () => {
			const successOnlyData = {
				...mockPaginatedData,
				entries: mockPaginatedData.entries.filter((e) => e.level === "SUCCESS"),
				filters: { ...mockPaginatedData.filters, levelFilter: "SUCCESS" },
			};

			mockLogReader.getPaginatedEntries.mockResolvedValue(successOnlyData);

			const logReader = new LogReaderService();
			const result = await logReader.getPaginatedEntries({
				levelFilter: "SUCCESS",
			});

			expect(result.filters.levelFilter).toBe("SUCCESS");
		});

		test("supports filtering by INFO level", async () => {
			const infoOnlyData = {
				...mockPaginatedData,
				entries: mockPaginatedData.entries.filter((e) => e.level === "INFO"),
				filters: { ...mockPaginatedData.filters, levelFilter: "INFO" },
			};

			mockLogReader.getPaginatedEntries.mockResolvedValue(infoOnlyData);

			const logReader = new LogReaderService();
			const result = await logReader.getPaginatedEntries({
				levelFilter: "INFO",
			});

			expect(result.filters.levelFilter).toBe("INFO");
		});

		test("supports showing all levels", async () => {
			const logReader = new LogReaderService();
			const result = await logReader.getPaginatedEntries({
				levelFilter: "ALL",
			});

			expect(result.filters.levelFilter).toBe("ALL");
			expect(result.entries.length).toBe(4); // All entries
		});
	});

	describe("Text Search", () => {
		test("searches in message content", async () => {
			const searchResults = {
				...mockPaginatedData,
				entries: mockPaginatedData.entries.filter((e) =>
					e.message.toLowerCase().includes("snowboard")
				),
				filters: { ...mockPaginatedData.filters, searchTerm: "snowboard" },
			};

			mockLogReader.getPaginatedEntries.mockResolvedValue(searchResults);

			const logReader = new LogReaderService();
			const result = await logReader.getPaginatedEntries({
				searchTerm: "snowboard",
			});

			expect(mockLogReader.getPaginatedEntries).toHaveBeenCalledWith(
				expect.objectContaining({ searchTerm: "snowboard" })
			);
			expect(result.filters.searchTerm).toBe("snowboard");
		});

		test("searches in title content", async () => {
			const searchResults = {
				...mockPaginatedData,
				entries: mockPaginatedData.entries.filter((e) =>
					e.title.toLowerCase().includes("error")
				),
				filters: { ...mockPaginatedData.filters, searchTerm: "error" },
			};

			mockLogReader.getPaginatedEntries.mockResolvedValue(searchResults);

			const logReader = new LogReaderService();
			const result = await logReader.getPaginatedEntries({
				searchTerm: "error",
			});

			expect(result.filters.searchTerm).toBe("error");
		});

		test("searches in details content", async () => {
			const searchResults = {
				...mockPaginatedData,
				entries: mockPaginatedData.entries.filter((e) =>
					e.details.toLowerCase().includes("rate limit")
				),
				filters: { ...mockPaginatedData.filters, searchTerm: "rate limit" },
			};

			mockLogReader.getPaginatedEntries.mockResolvedValue(searchResults);

			const logReader = new LogReaderService();
			const result = await logReader.getPaginatedEntries({
				searchTerm: "rate limit",
			});

			expect(result.filters.searchTerm).toBe("rate limit");
		});

		test("searches in product titles", async () => {
			const searchResults = {
				...mockPaginatedData,
				entries: mockPaginatedData.entries.filter(
					(e) =>
						e.productTitle && e.productTitle.toLowerCase().includes("hidden")
				),
				filters: { ...mockPaginatedData.filters, searchTerm: "hidden" },
			};

			mockLogReader.getPaginatedEntries.mockResolvedValue(searchResults);

			const logReader = new LogReaderService();
			const result = await logReader.getPaginatedEntries({
				searchTerm: "hidden",
			});

			expect(result.filters.searchTerm).toBe("hidden");
		});

		test("handles case-insensitive search", async () => {
			const searchResults = {
				...mockPaginatedData,
				entries: mockPaginatedData.entries.filter((e) =>
					e.message.toLowerCase().includes("update")
				),
				filters: { ...mockPaginatedData.filters, searchTerm: "UPDATE" },
			};

			mockLogReader.getPaginatedEntries.mockResolvedValue(searchResults);

			const logReader = new LogReaderService();
			const result = await logReader.getPaginatedEntries({
				searchTerm: "UPDATE",
			});

			expect(result.filters.searchTerm).toBe("UPDATE");
		});
	});

	describe("Advanced Search Features", () => {
		test("searches by operation type", async () => {
			const searchResults = {
				...mockPaginatedData,
				entries: mockPaginatedData.entries.filter((e) => e.type === "rollback"),
				filters: { ...mockPaginatedData.filters, searchTerm: "rollback" },
			};

			mockLogReader.getPaginatedEntries.mockResolvedValue(searchResults);

			const logReader = new LogReaderService();
			const result = await logReader.getPaginatedEntries({
				searchTerm: "rollback",
			});

			expect(result.filters.searchTerm).toBe("rollback");
		});

		test("searches in configuration values", async () => {
			const searchResults = {
				...mockPaginatedData,
				entries: mockPaginatedData.entries.filter(
					(e) =>
						e.configuration &&
						Object.values(e.configuration).some((v) =>
							v.includes("summer-sale")
						)
				),
				filters: { ...mockPaginatedData.filters, searchTerm: "summer-sale" },
			};

			mockLogReader.getPaginatedEntries.mockResolvedValue(searchResults);

			const logReader = new LogReaderService();
			const result = await logReader.getPaginatedEntries({
				searchTerm: "summer-sale",
			});

			expect(result.filters.searchTerm).toBe("summer-sale");
		});

		test("supports date-based search for today", async () => {
			const todayResults = {
				...mockPaginatedData,
				entries: mockPaginatedData.entries.filter((e) => {
					const today = new Date();
					return e.timestamp.toDateString() === today.toDateString();
				}),
				filters: { ...mockPaginatedData.filters, searchTerm: "today" },
			};

			mockLogReader.getPaginatedEntries.mockResolvedValue(todayResults);

			const logReader = new LogReaderService();
			const result = await logReader.getPaginatedEntries({
				searchTerm: "today",
			});

			expect(result.filters.searchTerm).toBe("today");
		});

		test("returns empty results for non-matching search", async () => {
			const emptyResults = {
				...mockPaginatedData,
				entries: [],
				pagination: {
					...mockPaginatedData.pagination,
					totalEntries: 0,
					totalPages: 0,
					endIndex: 0,
				},
				filters: { ...mockPaginatedData.filters, searchTerm: "nonexistent" },
			};

			mockLogReader.getPaginatedEntries.mockResolvedValue(emptyResults);

			const logReader = new LogReaderService();
			const result = await logReader.getPaginatedEntries({
				searchTerm: "nonexistent",
			});

			expect(result.entries).toHaveLength(0);
			expect(result.pagination.totalEntries).toBe(0);
		});
	});

	describe("Combined Filtering", () => {
		test("supports combining level filter and search", async () => {
			const combinedResults = {
				...mockPaginatedData,
				entries: mockPaginatedData.entries.filter(
					(e) =>
						e.level === "ERROR" && e.message.toLowerCase().includes("failed")
				),
				filters: { levelFilter: "ERROR", searchTerm: "failed" },
			};

			mockLogReader.getPaginatedEntries.mockResolvedValue(combinedResults);

			const logReader = new LogReaderService();
			const result = await logReader.getPaginatedEntries({
				levelFilter: "ERROR",
				searchTerm: "failed",
			});

			expect(result.filters.levelFilter).toBe("ERROR");
			expect(result.filters.searchTerm).toBe("failed");
		});

		test("resets pagination when applying filters", async () => {
			const logReader = new LogReaderService();

			// Apply filter and verify page resets to 0
			await logReader.getPaginatedEntries({
				levelFilter: "ERROR",
				page: 0, // Should reset to 0 when filtering
			});

			expect(mockLogReader.getPaginatedEntries).toHaveBeenCalledWith(
				expect.objectContaining({ page: 0 })
			);
		});
	});

	describe("Filter Persistence", () => {
		test("maintains filters across pagination", async () => {
			const logReader = new LogReaderService();

			// Apply filters and navigate to page 2
			await logReader.getPaginatedEntries({
				levelFilter: "INFO",
				searchTerm: "update",
				page: 1,
			});

			expect(mockLogReader.getPaginatedEntries).toHaveBeenCalledWith(
				expect.objectContaining({
					levelFilter: "INFO",
					searchTerm: "update",
					page: 1,
				})
			);
		});

		test("clears filters when requested", async () => {
			const clearedResults = {
				...mockPaginatedData,
				filters: { levelFilter: "ALL", searchTerm: "" },
			};

			mockLogReader.getPaginatedEntries.mockResolvedValue(clearedResults);

			const logReader = new LogReaderService();
			const result = await logReader.getPaginatedEntries({
				levelFilter: "ALL",
				searchTerm: "",
				page: 0,
			});

			expect(result.filters.levelFilter).toBe("ALL");
			expect(result.filters.searchTerm).toBe("");
		});
	});

	describe("Performance Considerations", () => {
		test("handles large result sets efficiently", async () => {
			const largeResults = {
				...mockPaginatedData,
				pagination: {
					...mockPaginatedData.pagination,
					totalEntries: 1000,
					totalPages: 50,
					pageSize: 20,
				},
			};

			mockLogReader.getPaginatedEntries.mockResolvedValue(largeResults);

			const logReader = new LogReaderService();
			const result = await logReader.getPaginatedEntries({
				searchTerm: "update",
				pageSize: 20,
			});

			expect(result.pagination.totalEntries).toBe(1000);
			expect(result.pagination.totalPages).toBe(50);
		});

		test("limits results per page appropriately", async () => {
			const logReader = new LogReaderService();

			await logReader.getPaginatedEntries({ pageSize: 5 });

			expect(mockLogReader.getPaginatedEntries).toHaveBeenCalledWith(
				expect.objectContaining({ pageSize: 5 })
			);
		});
	});
});