import { BookingError, emailPattern } from "../services/booking-service.js";
import { json, readJson } from "./bookings.js";

export async function handleReview(request, response, bookings, reviews) {
    if (request.method !== "POST") {
        response.setHeader("Allow", "POST");
        return json(response, 405, {
            error: { message: "Bitte POST verwenden." },
        });
    }
    try {
        const input = await readJson(request);
        if (!input || typeof input !== "object" || Array.isArray(input)) {
            throw new BookingError(
                400,
                "INVALID_INPUT",
                "Bitte das Formular ausfüllen.",
            );
        }
        const fields = {};
        const email =
            typeof input.email === "string"
                ? input.email.trim().toLowerCase()
                : "";
        if (email.length > 254 || !emailPattern.test(email)) {
            fields.email = "Bitte eine gültige E-Mail-Adresse eingeben.";
        }
        const record = { email };
        for (const [field, max, label] of [
            ["title", 50, "Titel"],
            ["review", 500, "Bewertungstext"],
        ]) {
            const value =
                typeof input[field] === "string" ? input[field].trim() : "";
            if (value.length < 10 || value.length > max) {
                fields[field] =
                    `${label}: Bitte 10 bis ${max} Zeichen eingeben.`;
            }
            record[field] = value;
        }
        if (
            !Number.isInteger(input.rating) ||
            input.rating < 1 ||
            input.rating > 5
        ) {
            fields.rating = "Bitte 1 bis 5 Sterne auswählen.";
        }
        if (input.consent !== true) {
            fields.consent = "Bitte die Datenschutzbestimmungen akzeptieren.";
        }
        if (Object.keys(fields).length) {
            throw new BookingError(
                400,
                "INVALID_INPUT",
                Object.values(fields).join(" "),
                fields,
            );
        }
        const customers = await bookings.readAll();
        if (
            !customers.some(
                (booking) => booking.email.trim().toLowerCase() === email,
            )
        ) {
            throw new BookingError(
                403,
                "BOOKING_REQUIRED",
                "Unter dieser E-Mail-Adresse wurde keine Buchung gefunden. Bitte verwende die E-Mail-Adresse deiner Buchung.",
            );
        }
        await reviews.append({
            ...record,
            rating: input.rating,
            consent: true,
            createdAt: new Date().toISOString(),
        });
        return json(response, 201, { saved: true });
    } catch (error) {
        if (error instanceof BookingError) {
            return json(response, error.status, {
                error: {
                    code: error.code,
                    message: error.message,
                    fields: error.fields,
                },
            });
        }
        return json(response, 503, {
            error: {
                code: "REVIEW_NOT_SAVED",
                message:
                    "Die Bewertung konnte nicht gespeichert werden. Bitte versuche es später erneut.",
            },
        });
    }
}