import { expect, test } from "@playwright/test";
import type {
	AcceptanceResponse,
	ReviewListResponse,
} from "../../src/api/workflow";

/**
 * Helper: mock all API routes needed to render the Chat view.
 */
function mockChatApis(
	page: import("@playwright/test").Page,
	overrides: {
		acceptance?: AcceptanceResponse;
		reviewQueue?: ReviewListResponse;
	} = {},
) {
	const acceptance: AcceptanceResponse = overrides.acceptance ?? {
		can_accept: false,
		reasons: ["No test results recorded for the story."],
		warning: null,
		summary: { total: 0, passed: 0, failed: 0 },
		missing_categories: ["unit", "integration"],
	};

	const reviewQueue: ReviewListResponse = overrides.reviewQueue ?? {
		stories: [],
	};

	return Promise.all([
		page.route("**/api/projects", (route) =>
			route.fulfill({ json: ["/tmp/test-project"] }),
		),
		page.route("**/api/io/fs/home", (route) => route.fulfill({ json: "/tmp" })),
		page.route("**/api/project", (route) => {
			if (route.request().method() === "POST") {
				return route.fulfill({ json: "/tmp/test-project" });
			}
			if (route.request().method() === "DELETE") {
				return route.fulfill({ json: true });
			}
			return route.fulfill({ json: null });
		}),
		page.route("**/api/ollama/models**", (route) =>
			route.fulfill({ json: ["llama3.1"] }),
		),
		page.route("**/api/anthropic/key/exists", (route) =>
			route.fulfill({ json: false }),
		),
		page.route("**/api/anthropic/models", (route) =>
			route.fulfill({ json: [] }),
		),
		page.route("**/api/model", (route) => {
			if (route.request().method() === "POST") {
				return route.fulfill({ json: true });
			}
			return route.fulfill({ json: null });
		}),
		page.route("**/api/workflow/acceptance", (route) => {
			if (route.request().url().includes("/ensure")) return route.fallback();
			return route.fulfill({ json: acceptance });
		}),
		page.route("**/api/workflow/review/all", (route) =>
			route.fulfill({ json: reviewQueue }),
		),
		page.route("**/api/workflow/acceptance/ensure", (route) =>
			route.fulfill({ json: true }),
		),
		page.route("**/api/io/fs/list/absolute**", (route) =>
			route.fulfill({ json: [] }),
		),
	]);
}

async function openProject(page: import("@playwright/test").Page) {
	await page.goto("/");
	await page.getByPlaceholder("/path/to/project").fill("/tmp/test-project");
	await page.getByRole("button", { name: "Open Project" }).click();
	await expect(page.getByText("Workflow Gates", { exact: true })).toBeVisible();
}

test.describe("Coverage threshold (AC1)", () => {
	test("shows blocked status when coverage is below threshold", async ({
		page,
	}) => {
		await mockChatApis(page, {
			acceptance: {
				can_accept: false,
				reasons: ["Coverage below threshold (55.0% < 80.0%)."],
				warning: null,
				summary: { total: 3, passed: 3, failed: 0 },
				missing_categories: [],
				coverage_report: {
					current_percent: 55.0,
					threshold_percent: 80.0,
					baseline_percent: null,
				},
			},
		});

		await openProject(page);

		await expect(page.getByText("Blocked").first()).toBeVisible();
		await expect(page.getByText(/Coverage: 55\.0%/)).toBeVisible();
		await expect(page.getByText(/threshold: 80\.0%/)).toBeVisible();
		await expect(
			page.getByText("Coverage below threshold (55.0% < 80.0%)."),
		).toBeVisible();
	});

	test("shows green coverage when above threshold", async ({ page }) => {
		await mockChatApis(page, {
			acceptance: {
				can_accept: true,
				reasons: [],
				warning: null,
				summary: { total: 5, passed: 5, failed: 0 },
				missing_categories: [],
				coverage_report: {
					current_percent: 92.0,
					threshold_percent: 80.0,
					baseline_percent: 90.0,
				},
			},
		});

		await openProject(page);

		await expect(page.getByText("Ready to accept")).toBeVisible();
		await expect(page.getByText(/Coverage: 92\.0%/)).toBeVisible();
	});
});

test.describe("Coverage regression reporting (AC2)", () => {
	test("review panel shows coverage regression reason", async ({ page }) => {
		await mockChatApis(page, {
			reviewQueue: {
				stories: [
					{
						story_id: "27_protect_tests_and_coverage",
						can_accept: false,
						reasons: ["Coverage regression: 90.0% → 82.0% (threshold: 80.0%)."],
						warning: null,
						summary: { total: 4, passed: 4, failed: 0 },
						missing_categories: [],
						coverage_report: {
							current_percent: 82.0,
							threshold_percent: 80.0,
							baseline_percent: 90.0,
						},
					},
				],
			},
		});

		await openProject(page);

		await expect(
			page.getByText(/Coverage regression.*90\.0%.*82\.0%/),
		).toBeVisible();
		await expect(page.getByText(/Coverage: 82\.0%/)).toBeVisible();

		const blockedButton = page.getByRole("button", { name: "Blocked" });
		await expect(blockedButton).toBeDisabled();
	});

	test("blocked acceptance with coverage and test failures combined", async ({
		page,
	}) => {
		await mockChatApis(page, {
			acceptance: {
				can_accept: false,
				reasons: [
					"1 test(s) are failing; acceptance is blocked.",
					"Coverage below threshold (65.0% < 80.0%).",
				],
				warning: null,
				summary: { total: 4, passed: 3, failed: 1 },
				missing_categories: [],
				coverage_report: {
					current_percent: 65.0,
					threshold_percent: 80.0,
					baseline_percent: null,
				},
			},
		});

		await openProject(page);

		await expect(page.getByText("Blocked").first()).toBeVisible();
		await expect(
			page.getByText("Coverage below threshold (65.0% < 80.0%)."),
		).toBeVisible();
		await expect(page.getByText(/Coverage: 65\.0%/)).toBeVisible();
		await expect(page.getByText(/1 test\(s\) are failing/)).toBeVisible();
	});
});

test.describe("Coverage collection (E2E)", () => {
	test("collect coverage button triggers collection and displays result", async ({
		page,
	}) => {
		await mockChatApis(page);

		// Mock the collect coverage endpoint
		await page.route("**/api/workflow/coverage/collect", (route) =>
			route.fulfill({
				json: {
					current_percent: 85.0,
					threshold_percent: 80.0,
					baseline_percent: null,
				},
			}),
		);

		await openProject(page);

		// Click the Collect Coverage button
		const collectButton = page.getByRole("button", {
			name: "Collect Coverage",
		});
		await expect(collectButton).toBeVisible();

		// Override acceptance to return coverage data after collection
		await page.unroute("**/api/workflow/acceptance");
		await page.route("**/api/workflow/acceptance", (route) => {
			if (route.request().url().includes("/ensure")) return route.fallback();
			return route.fulfill({
				json: {
					can_accept: true,
					reasons: [],
					warning: null,
					summary: { total: 5, passed: 5, failed: 0 },
					missing_categories: [],
					coverage_report: {
						current_percent: 85.0,
						threshold_percent: 80.0,
						baseline_percent: null,
					},
				},
			});
		});

		await collectButton.click();

		await expect(page.getByText(/Coverage: 85\.0%/)).toBeVisible();
	});
});