import type { Kennzahl } from "@/types/kpi";

const API_HOST = import.meta.env.VITE_API_HOST || "http://localhost:5050";

export { API_HOST };

export const fetchKPI = async (
	pitchBookId: string,
): Promise<{
	[key: string]: {
		label: string;
		entity: string;
		page: number;
		status: string;
		source: string;
	}[];
}> => {
	const response = await fetch(`${API_HOST}/api/pitch_book/${pitchBookId}`);
	const data = await response.json();

	return data.kpi ? getKPI(data.kpi) : {};
};

export const fetchPutKPI = async (
	pitchBookId: number,
	kpi: {
		[key: string]: {
			label: string;
			entity: string;
			page: number;
			status: string;
			source: string;
		}[];
	},
): Promise<{
	[key: string]: {
		label: string;
		entity: string;
		page: number;
		status: string;
		source: string;
	}[];
}> => {
	const formData = new FormData();
	formData.append("kpi", JSON.stringify(flattenKPIArray(kpi)));

	const response = await fetch(`${API_HOST}/api/pitch_book/${pitchBookId}`, {
		method: "PUT",
		body: formData,
	});
	if (!response.ok) {
		throw new Error(`HTTP error! status: ${response.status}`);
	}
	const data = await response.json();
	return getKPI(data.kpi);
};

const getKPI = (data: string) => {
	const kpi = JSON.parse(data) as {
		label: string;
		entity: string;
		page: number;
		status: string;
		source: string;
	}[];

	const reducedKpi = kpi.reduce(
		(prev, curr) => {
			if (!prev[curr.label]) {
				prev[curr.label] = [];
			}
			prev[curr.label].push(curr);
			return prev;
		},
		{} as {
			[key: string]: {
				label: string;
				entity: string;
				page: number;
				status: string;
				source: string;
			}[];
		},
	);
	return reducedKpi;
};

export const flattenKPIArray = (kpi: {
	[key: string]: {
		label: string;
		entity: string;
		page: number;
		status: string;
		source: string;
	}[];
}) => {
	return Object.values(kpi).flat();
};

export const fetchKennzahlen = async (): Promise<Kennzahl[]> => {
	const response = await fetch(`${API_HOST}/api/kpi_setting/`);
	if (!response.ok) {
		throw new Error(`HTTP error! status: ${response.status}`);
	}

	const data = await response.json();
	return data;
};

export async function fetchPitchBooks() {
	const response = await fetch(`${API_HOST}/api/pitch_book/`);
	if (!response.ok) {
		throw new Error("Failed to fetch pitch books");
	}
	return response.json();
}

export async function fetchPitchBooksById(id: number) {
	const response = await fetch(`${API_HOST}/api/pitch_book/${id}`);
	if (!response.ok) {
		throw new Error("Failed to fetch pitch books");
	}
	return response.json();
}