export type TestStatus = "pass" | "fail";

export interface TestCasePayload {
	name: string;
	status: TestStatus;
	details?: string | null;
}

export interface RecordTestsPayload {
	story_id: string;
	unit: TestCasePayload[];
	integration: TestCasePayload[];
}

export interface AcceptanceRequest {
	story_id: string;
}

export interface TestRunSummaryResponse {
	total: number;
	passed: number;
	failed: number;
}

export interface CoverageReportResponse {
	current_percent: number;
	threshold_percent: number;
	baseline_percent?: number | null;
}

export interface AcceptanceResponse {
	can_accept: boolean;
	reasons: string[];
	warning?: string | null;
	summary: TestRunSummaryResponse;
	missing_categories: string[];
	coverage_report?: CoverageReportResponse | null;
}

export interface ReviewStory {
	story_id: string;
	can_accept: boolean;
	reasons: string[];
	warning?: string | null;
	summary: TestRunSummaryResponse;
	missing_categories: string[];
	coverage_report?: CoverageReportResponse | null;
}

export interface RecordCoveragePayload {
	story_id: string;
	current_percent: number;
	threshold_percent?: number | null;
}

export interface CollectCoverageRequest {
	story_id: string;
	threshold_percent?: number | null;
}

export interface ReviewListResponse {
	stories: ReviewStory[];
}

export interface StoryTodosResponse {
	story_id: string;
	story_name: string | null;
	todos: string[];
}

export interface TodoListResponse {
	stories: StoryTodosResponse[];
}

export interface UpcomingStory {
	story_id: string;
	name: string | null;
}

export interface UpcomingStoriesResponse {
	stories: UpcomingStory[];
}

const DEFAULT_API_BASE = "/api";

function buildApiUrl(path: string, baseUrl = DEFAULT_API_BASE): string {
	return `${baseUrl}${path}`;
}

async function requestJson<T>(
	path: string,
	options: RequestInit = {},
	baseUrl = DEFAULT_API_BASE,
): Promise<T> {
	const res = await fetch(buildApiUrl(path, baseUrl), {
		headers: {
			"Content-Type": "application/json",
			...(options.headers ?? {}),
		},
		...options,
	});

	if (!res.ok) {
		const text = await res.text();
		throw new Error(text || `Request failed (${res.status})`);
	}

	return res.json() as Promise<T>;
}

export const workflowApi = {
	collectCoverage(payload: CollectCoverageRequest, baseUrl?: string) {
		return requestJson<CoverageReportResponse>(
			"/workflow/coverage/collect",
			{ method: "POST", body: JSON.stringify(payload) },
			baseUrl,
		);
	},
	recordCoverage(payload: RecordCoveragePayload, baseUrl?: string) {
		return requestJson<boolean>(
			"/workflow/coverage/record",
			{ method: "POST", body: JSON.stringify(payload) },
			baseUrl,
		);
	},
	recordTests(payload: RecordTestsPayload, baseUrl?: string) {
		return requestJson<boolean>(
			"/workflow/tests/record",
			{ method: "POST", body: JSON.stringify(payload) },
			baseUrl,
		);
	},
	getAcceptance(payload: AcceptanceRequest, baseUrl?: string) {
		return requestJson<AcceptanceResponse>(
			"/workflow/acceptance",
			{ method: "POST", body: JSON.stringify(payload) },
			baseUrl,
		);
	},
	getReviewQueue(baseUrl?: string) {
		return requestJson<ReviewListResponse>("/workflow/review", {}, baseUrl);
	},
	getReviewQueueAll(baseUrl?: string) {
		return requestJson<ReviewListResponse>("/workflow/review/all", {}, baseUrl);
	},
	getUpcomingStories(baseUrl?: string) {
		return requestJson<UpcomingStoriesResponse>(
			"/workflow/upcoming",
			{},
			baseUrl,
		);
	},
	ensureAcceptance(payload: AcceptanceRequest, baseUrl?: string) {
		return requestJson<boolean>(
			"/workflow/acceptance/ensure",
			{ method: "POST", body: JSON.stringify(payload) },
			baseUrl,
		);
	},
	getStoryTodos(baseUrl?: string) {
		return requestJson<TodoListResponse>("/workflow/todos", {}, baseUrl);
	},
};