import request from 'supertest';
import express from 'express';
import fs from 'fs';
import path from 'path';
import app from './server';

const TEST_MERGED_CALENDARS_DIR = path.join(__dirname, 'temp_test_calendar');
const MERGED_CALENDARS_DIR = 'calendar';
const TEST_CALENDARS_DIR = 'test_calendars';
let server;

describe('Calendar Merging API', () => {
    beforeAll(async () => {
        // Set environment variable for the test directory
        process.env.TEST_MERGED_CALENDARS_DIR = TEST_MERGED_CALENDARS_DIR;
        // Start the server
        server = app.listen(0);
        // Ensure the test merged calendars directory exists
        if (!fs.existsSync(TEST_MERGED_CALENDARS_DIR)) {
            fs.mkdirSync(TEST_MERGED_CALENDARS_DIR, { recursive: true });
        }
    });

    afterAll(async () => {
        // Clean up the merged calendars directory after tests
         fs.rmSync(TEST_MERGED_CALENDARS_DIR, { recursive: true, force: true });
        
         // Close the server
        await new Promise(resolve => server.close(resolve));
    });

    const loadCalendarFile = (filename) => {
        return path.join(__dirname, TEST_CALENDARS_DIR, filename);
    };

    test('Merge date-based calendar', async () => {
        const response = await request(server)
            .post('/merge')
            .send({
                linkGroupName: 'Date Based Calendar',
                calendars: [
                    {
                        url: loadCalendarFile('ferien_bayern_2023.ics'),
                        prefix: 'Ferien_Bayern_2023',
                        override: false,
                    },
                    {
                        url: loadCalendarFile('US_Holidays.ics'),
                        prefix: 'US_holidays',
                        override: false,
                    },
                ],
            });
        expect(response.status).toBe(200);
        expect(response.body.url).toMatch(/calendar\/Date_Based_Calendar/);

        // Check if the file was created in the test directory
        const filePath = path.join(TEST_MERGED_CALENDARS_DIR, 'Date_Based_Calendar.ics');
        expect(fs.existsSync(filePath)).toBe(true);
    });

    test('Merge time-based calendar', async () => {
        const response = await request(server)
            .post('/merge')
            .send({
                linkGroupName: 'Time Based Calendar',
                calendars: [
                    {
                        url: loadCalendarFile('other_work.ics'),
                        prefix: 'other_work',
                        override: false,
                    },
                    {
                        url: loadCalendarFile('work.ics'),
                        prefix: 'work',
                        override: false,
                    },
                ],
            });

        expect(response.status).toBe(200);
        expect(response.body.url).toMatch(/calendar\/Time_Based_Calendar/);
        
        // Check if the file was created in the test directory
        const filePath = path.join(TEST_MERGED_CALENDARS_DIR, 'Time_Based_Calendar.ics');
        expect(fs.existsSync(filePath)).toBe(true);
    });

    test('Merge calendar without prefix', async () => {
        const response = await request(server)
            .post('/merge')
            .send({
                linkGroupName: 'No Prefix Calendar',
                calendars: [
                    {
                        url: loadCalendarFile('San_Francisco_Public_Holidays.ics'),
                        prefix: '',
                        override: false,
                    },
                ],
            });

        expect(response.status).toBe(200);
        expect(response.body.url).toMatch(/calendar\/No_Prefix_Calendar/);
        
        // Check if the file was created in the test directory
        const filePath = path.join(MTEST_MERGED_CALENDARS_DIR, 'No_Prefix_Calendar.ics');
        expect(fs.existsSync(filePath)).toBe(true);
    });
    
    test('Merge calendar with override', async () => {
        const response = await request(server)
            .post('/merge')
            .send({
                linkGroupName: 'Override Calendar',
                calendars: [
                    {
                        url: loadCalendarFile('San_Francisco_Public_Holidays.ics'),
                        prefix: 'Override Event',
                        override: true,
                    },
                ],
            });

        expect(response.status).toBe(200);
        expect(response.body.url).toMatch(/calendar\/Override_Calendar/);
        
        // Check if the file was created in the test directory
        const filePath = path.join(TEST_MERGED_CALENDARS_DIR, 'Override_Calendar.ics');
        expect(fs.existsSync(filePath)).toBe(true);
    });

});