import { authorizeHousekeeping } from "../../../foundation/authorization";
import {
	fail,
	type HousekeepingQuery,
	ok,
} from "../../../foundation/contracts";
import { isSafeHousekeepingHref } from "../../../foundation/housekeeping-href";
import {
	type ContentRouteGroup,
	type ContentRouteId,
	contentRouteById,
	contentRouteGroup,
} from "../routes";

export interface ContentQueryListInput {
	readonly search?: string;
	readonly pageSize?: number;
	readonly offset?: number;
}

export interface ContentQueryInput {
	readonly routeId: ContentRouteId;
	readonly params?: Readonly<Record<string, string>>;
	readonly list?: ContentQueryListInput;
}

export interface ContentQueryItem {
	readonly id: string;
	readonly title: string;
	readonly status?: string;
	readonly description?: string;
	readonly href?: string;
	readonly updatedAt?: string | null;
	readonly privatePayload?: unknown;
}

export interface ContentQueryData {
	readonly kind: ContentRouteGroup;
	readonly items: readonly ContentQueryItem[];
	readonly total: number;
	readonly partialDependencies: readonly string[];
}

export interface NormalizedContentQueryInput {
	readonly routeId: ContentRouteId;
	readonly params: Readonly<Record<string, string>>;
	readonly list: Readonly<{
		search: string;
		pageSize: number;
		offset: number;
	}>;
}

export interface ContentQueryAdapters {
	load(input: NormalizedContentQueryInput): Promise<ContentQueryData>;
}

function boundedInteger(
	value: unknown,
	fallback: number,
	minimum: number,
	maximum: number,
): number {
	const parsed = Number(value);
	if (!Number.isSafeInteger(parsed)) return fallback;
	return Math.min(maximum, Math.max(minimum, parsed));
}

function normalizeInput(input: ContentQueryInput): NormalizedContentQueryInput {
	return {
		routeId: input.routeId,
		params: Object.fromEntries(
			Object.entries(input.params ?? {}).map(([key, value]) => [
				key.normalize("NFC").trim().slice(0, 128),
				value.normalize("NFC").trim().slice(0, 128),
			]),
		),
		list: {
			search: String(input.list?.search ?? "")
				.normalize("NFC")
				.trim()
				.slice(0, 128),
			pageSize: boundedInteger(input.list?.pageSize, 25, 1, 100),
			offset: boundedInteger(input.list?.offset, 0, 0, 100_000),
		},
	};
}

function isValidData(
	data: ContentQueryData,
	input: NormalizedContentQueryInput,
): boolean {
	if (
		data.kind !== contentRouteGroup(input.routeId) ||
		!Array.isArray(data.items) ||
		!Number.isSafeInteger(data.total) ||
		data.total < 0 ||
		!Array.isArray(data.partialDependencies) ||
		data.partialDependencies.length !== 0
	) {
		return false;
	}
	return data.items.every(
		(item) =>
			typeof item.id === "string" &&
			item.id.length > 0 &&
			typeof item.title === "string" &&
			item.title.length > 0 &&
			(item.href === undefined || isSafeHousekeepingHref(item.href)),
	);
}

export function createContentQuery(
	adapters: ContentQueryAdapters,
): HousekeepingQuery<ContentQueryInput, ContentQueryData> {
	return {
		id: "content.query",
		owner: "content",
		capability: contentRouteById("content.editorial.articles").capability,
		async run(context, input) {
			const route = contentRouteById(input.routeId);
			const authorization = authorizeHousekeeping(context, route.capability);
			if (!authorization.ok) return authorization;
			const normalized = normalizeInput(input);
			try {
				const data = await adapters.load(normalized);
				if (!isValidData(data, normalized)) {
					throw new Error("invalid Content query data");
				}
				return ok(data, authorization.correlationId);
			} catch {
				return fail(
					"DEPENDENCY_UNAVAILABLE",
					"errors.housekeeping.dependencyUnavailable",
					authorization.correlationId,
				);
			}
		},
	};
}

export const contentQuery = createContentQuery({
	async load(input) {
		const { loadProductionContentQuery } = await import(
			"./content-queries-production"
		);
		return loadProductionContentQuery(input);
	},
});