import { Readable } from 'stream';
import { client } from '$lib/minio';
import { fail } from '@sveltejs/kit';
import { v4 as uuidv4 } from 'uuid';

import { db } from '$lib/server/dbService';
import { getVorgangByName, vorgangNameExists } from '$lib/server/vorgangService';

const isRequiredFieldValid = (value: unknown) => {
	if (value == null) return false;

	if (typeof value === 'string' || value instanceof String) return value.trim() !== '';

	return true;
};

export const actions = {
	url: async ({ request }: { request: Request }) => {
		const data = await request.formData();
		const caseName = data.get('vorgang');
		const crimeName = data.get('name');
		const type = data.get('type');
		const password = data.get('password');
		const fileName = data.get('fileName');

		// store case in database
		// skip if Vorgang exists and token not changed

		const vorgangExists = vorgangNameExists(caseName);
		let token;

		if (!vorgangExists) {
			token = uuidv4();
			let insertSQLStatement = `INSERT INTO cases (token, name, pw) VALUES (?, ?, ?)`;
			const statement = db.prepare(insertSQLStatement);
			statement.run(token, caseName, password);
		} else {
			// vorgang exists
			// check if PW was changed, and update DB if it was
			const vorg = getVorgangByName(caseName);
			token = vorg.token;
			if (vorg.pw != password) {
				let updateSQLStmt = `UPDATE cases SET pw = ? WHERE name = ?`;
				const statement = db.prepare(updateSQLStmt);
				statement.run(password, vorg);
			}
		}

		let objectName = `${token}/${crimeName}`;
		switch (type) {
			case 'image/png':
				if (!objectName.endsWith('.png')) objectName += '.png';
				break;
			case '':
				if (fileName?.toString().endsWith('.glb') && !objectName.endsWith('.glb'))
					objectName += '.glb';
		}

		const url = await client.presignedPutObject('tatort', objectName);

		return { url };
	},
	validate: async ({ request }: { request: Request }) => {
		const requestData = await request.formData();
		const data = Object.fromEntries(requestData);
		const vorgang = data.vorgang;
		const name = data.name;
		const password = data.password;
		let success = true;
		const err = {};
		if (isRequiredFieldValid(vorgang)) err.vorgang = null;
		else {
			err.vorgang = 'Das Feld Vorgang darf nicht leer bleiben.';
			success = false;
		}

		if (isRequiredFieldValid(name)) err.name = null;
		else {
			err.name = 'Das Feld Name darf nicht leer bleiben.';
			success = false;
		}

		if (isRequiredFieldValid(password)) err.password = null;
		else {
			err.password = 'Das Feld Zugangspasswort darf nicht leer bleiben.';
			success = false;
		}

		if (success) return { success };

		return fail(400, err);
	},

	upload: async ({ request }: { request: Request }) => {
		const requestData = await request.formData();
		const data = Object.fromEntries(requestData);
		const vorgang = data.vorgang;
		const name = data.name;

		const url = await client.presignedPutObject('tatort', `${vorgang}/${name}`, 60);

		return { url };
	},
	upload3: async ({ request }: { request: Request }) => {
		const requestData = await request.formData();
		const data = Object.fromEntries(requestData);
		const name = data.name;
		const stream = data.file.stream();
		const metaData = { 'Content-Type': 'model-gtlf-binary', 'X-VorgangsNr': '4711' };
		const result = new Promise((resolve, reject) => {
			client.putObject('tatort', name, Readable.from(stream), metaData, function (err, etag) {
				if (err) return reject(err);
				resolve(etag);
			});
		});
		let etag = null;
		let error = null;
		try {
			etag = await result;
		} catch (err) {
			error = err;
			console.log('Error:', err);
		}

		return { etag, error };
	}
};