const path = require('path');

const { CookieJar } = require('tough-cookie');
const cheerio = require('cheerio');

const got = require('@/utils/got');
const { art } = require('@/utils/render');
const { isValidHost } = require('@/utils/valid-host');

const cookieJar = new CookieJar();

const client = got.extend({
    cookieJar,
});

function appendRentalAPIParams(urlString) {
    const searchParams = new URLSearchParams(urlString);

    searchParams.set('is_format_data', '1');
    searchParams.set('is_new_list', '1');
    searchParams.set('type', '1');

    return searchParams.toString();
}

async function getToken() {
    const html = await client('https://rent.591.com.tw').text();

    const $ = cheerio.load(html);
    const csrfToken = $('meta[name="csrf-token"]').attr('content');

    if (!csrfToken) {
        throw 'CSRF token not found';
    }

    return csrfToken;
}

async function getHouseList(houseListURL) {
    const csrfToken = await getToken();

    const data = await client({
        url: houseListURL,
        headers: {
            'X-CSRF-TOKEN': csrfToken,
        },
    }).json();

    const {
        data: { data: houseList },
    } = data;

    return houseList;
}

/**

@typedef {object} House
@property {string} title - The title of the house.
@property {string} type - The type of the house.
@property {number} post_id - The post id of the house.
@property {string} kind_name - The name of the kind of the house.
@property {string} room_str - A string representation of the number of rooms in the house.
@property {string} floor_str - A string representation of the floor of the house.
@property {string} community - The community the house is located in.
@property {string} price - The price of the house.
@property {string} price_unit - The unit of the price of the house.
@property {string[]} photo_list - A list of photos of the house.
@property {string} section_name - The name of the section where the house is located.
@property {string} street_name - The name of the street where the house is located.
@property {string} location - The location of the house.
@property {RentTagItem[]} rent_tag - An array of rent tags for the house.
@property {string} area - The area of the house.
@property {string} role_name - The name of the role of the house.
@property {string} contact - The contact information for the house.
@property {string} refresh_time - The time the information about the house was last refreshed.
@property {number} yesterday_hit - The number of hits the house received yesterday.
@property {number} is_vip - A flag indicating whether the house is VIP or not.
@property {number} is_combine - A flag indicating whether the house is combined or not.
@property {number} hurry - A flag indicating whether there is a hurry for the house.
@property {number} is_socail - A flag indicating whether the house is social or not.
@property {Surrounding} surrounding - The surrounding area of the house.
@property {string} discount_price_str - A string representation of the discounted price of the house.
@property {number} cases_id - The id of the cases for the house.
@property {number} is_video - A flag indicating whether there is a video for the house.
@property {number} preferred - A flag indicating whether the house is preferred or not.
@property {number} cid - The id of the house.
*/

/**

@typedef {object} RentTagItem
@property {string} id - The id of the rent tag item.
@property {string} name - The name of the rent tag item.
*/
/**

@typedef {object} Surrounding
@property {string} type - The type of the surrounding.
@property {string} desc - The description of the surrounding.
@property {string} distance - The distance to the surrounding.
*/

const renderHouse = (house) => art(path.join(__dirname, 'templates/house.art'), { house });

module.exports = async (ctx) => {
    const query = ctx.params.query ?? '';
    const country = ctx.params.country ?? 'tw';

    if (!isValidHost(country) && country !== 'tw') {
        throw Error('Invalid country codes. Only "tw" is supported now.');
    }

    /** @type {House[]} */
    const houses = await getHouseList(`https://rent.591.com.tw/home/search/rsList?${appendRentalAPIParams(query)}`);

    const queryUrl = `https://rent.591.com.tw/?${query}`;

    const items = houses.map((house) => {
        const { title, post_id, price, price_unit } = house;

        const itemUrl = `https://rent.591.com.tw/home/${post_id}`;
        const itemTitle = `${title} - ${price} ${price_unit}`;

        const description = renderHouse(house);

        return {
            title: itemTitle,
            description,
            link: itemUrl,
        };
    });

    ctx.state.data = {
        title: '591 租屋 - 自訂查詢',
        link: queryUrl,
        description: `591 租屋 - 自訂查詢, query: ${query}`,
        item: items,
    };

    ctx.state.json = {
        houses,
    };
};