const axios = require("axios")
const cheerio = require("cheerio"); // HTML页面解析
async function search(name) {
    const list = await axios.get(`https://movie.douban.com/j/subject_suggest?q=${name}`, {
        proxy: false,
    })
    return {
        data: list.data.map(d => {
            d.img = "http://127.0.0.1:3050/doubanImg?url=" + d.img
            return {
                ...d,
                link: `https://movie.douban.com/subject/${d.id}/`
            }
        })
    }
}

// 解析HTML页面
function page_parser(responseText) {
    return cheerio.load(responseText, {
        decodeEntities: false
    });
}
// 解析JSONP返回
function jsonp_parser(responseText) {
    try {
        responseText = responseText.replace(/\n/ig, '').match(/[^(]+\((.+)\)/)[1];
        return JSON.parse(responseText);
    } catch (e) {
        return {}
    }
}

async function gen_douban(sid) {
    let data = {
        site: "douban",
        sid: sid
    };

    // 下面开始正常的豆瓣处理流程
    let douban_link = `https://movie.douban.com/subject/${sid}/`;  // 构造链接
    let db_page_resp = await fetch(douban_link); // 请求豆瓣对应项目主页面
    let douban_page_raw = await db_page_resp.text();

    // 对异常进行处理
    if (douban_page_raw.match(/你想访问的页面不存在/)) {
        return Object.assign(data, {
            error: NONE_EXIST_ERROR
        });
    } else if (douban_page_raw.match(/检测到有异常请求/)) { // 真的会有这种可能吗？
        return Object.assign(data, {
            error: "GenHelp was temporary banned by Douban, Please wait...."
        });
    } else {
        let awards_page_req = fetch(`${douban_link}awards`) // 马上请求豆瓣获奖界面

        // 解析主页面
        let $ = page_parser(douban_page_raw);

        let title = $("title").text().replace("(豆瓣)", "").trim();

        // 从ld+json中获取原来API返回的部分信息
        let ld_json = JSON.parse($('head > script[type="application/ld+json"]').html().replace(/(\r\n|\n|\r|\t)/gm, ''));

        // 元素获取方法
        let fetch_anchor = function (anchor) {
            return anchor[0].nextSibling.nodeValue.trim();
        };

        // 所有需要的元素
        let poster;
        let this_title, trans_title, aka;
        let year, region, genre, language, playdate;
        let imdb_link, imdb_id, imdb_average_rating, imdb_votes, imdb_rating;
        let douban_average_rating, douban_votes, douban_rating;
        let episodes, duration;
        let director, writer, cast;
        let tags, introduction, awards;

        // 提前imdb相关请求
        let imdb_api_req;
        let imdb_anchor = $('#info span.pl:contains("IMDb")');
        if (imdb_anchor.length > 0) {
            data["imdb_id"] = imdb_id = fetch_anchor(imdb_anchor);
            data["imdb_link"] = imdb_link = `https://www.imdb.com/title/${imdb_id}/`
            imdb_api_req = fetch(`https://p.media-imdb.com/static-content/documents/v1/title/${imdb_id}/ratings%3Fjsonp=imdb.rating.run:imdb.api.title.ratings/data.json`);
        }

        let chinese_title = data["chinese_title"] = title;
        let foreign_title = data["foreign_title"] = $('span[property="v:itemreviewed"]').text().replace(data["chinese_title"], "").trim();

        let aka_anchor = $('#info span.pl:contains("又名")');
        if (aka_anchor.length > 0) {
            aka = fetch_anchor(aka_anchor).split(" / ").sort(function (a, b) { //首字(母)排序
                return a.localeCompare(b);
            }).join("/");
            data["aka"] = aka.split("/");
        }

        if (foreign_title) {
            trans_title = chinese_title + (aka ? ("/" + aka) : "");
            this_title = foreign_title;
        } else {
            trans_title = aka ? aka : "";
            this_title = chinese_title;
        }

        data["trans_title"] = trans_title.split("/");
        data["this_title"] = this_title.split("/");

        let regions_anchor = $('#info span.pl:contains("制片国家/地区")'); //产地
        let language_anchor = $('#info span.pl:contains("语言")'); //语言
        let episodes_anchor = $('#info span.pl:contains("集数")'); //集数
        let duration_anchor = $('#info span.pl:contains("单集片长")'); //片长

        data["year"] = year = " " + $("#content > h1 > span.year").text().substr(1, 4);
        data["region"] = region = regions_anchor[0] ? fetch_anchor(regions_anchor).split(" / ") : "";

        data["genre"] = genre = $("#info span[property=\"v:genre\"]").map(function () { //类别
            return $(this).text().trim();
        }).toArray();

        data["language"] = language = language_anchor[0] ? fetch_anchor(language_anchor).split(" / ") : "";

        data["playdate"] = playdate = $("#info span[property=\"v:initialReleaseDate\"]").map(function () { //上映日期
            return $(this).text().trim();
        }).toArray().sort(function (a, b) { //按上映日期升序排列
            return new Date(a) - new Date(b);
        });

        data["episodes"] = episodes = episodes_anchor[0] ? fetch_anchor(episodes_anchor) : "";
        data["duration"] = duration = duration_anchor[0] ? fetch_anchor(duration_anchor) : $("#info span[property=\"v:runtime\"]").text().trim();

        // 简介 首先检查是不是有隐藏的，如果有，则直接使用隐藏span的内容作为简介，不然则用 span[property="v:summary"] 的内容
        // 20221201 issue#34 豆瓣将上一层div的id从 link-report 变为 link-report-intra
        let introduction_another = $('#link-report-intra > span.all.hidden, #link-report-intra > [property="v:summary"], #link-report > span.all.hidden, #link-report > [property="v:summary"]')
        data["introduction"] = introduction = (
            introduction_another.length > 0 ? introduction_another.text() : '暂无相关剧情介绍'
        ).split('\n').map(a => a.trim()).filter(a => a.length > 0).join('\n');  // 处理简介缩进

        // 从ld_json中获取信息
        data["douban_rating_average"] = douban_average_rating = ld_json['aggregateRating'] ? ld_json['aggregateRating']['ratingValue'] : 0;
        data["douban_votes"] = douban_votes = ld_json['aggregateRating'] ? ld_json['aggregateRating']['ratingCount'] : 0;
        data["douban_rating"] = douban_rating = `${douban_average_rating}/10 from ${douban_votes} users`;

        data["poster"] = poster = ld_json['image']
            .replace(/s(_ratio_poster|pic)/g, "l$1")
            .replace("img3", "img1");

        data["director"] = director = ld_json['director'] ? ld_json['director'] : [];
        data["writer"] = writer = ld_json['author'] ? ld_json['author'] : [];
        data["cast"] = cast = ld_json['actor'] ? ld_json['actor'] : [];

        let tag_another = $('div.tags-body > a[href^="/tag"]');
        if (tag_another.length > 0) {
            data["tags"] = tags = tag_another.map(function () {
                return $(this).text()
            }).get();
        }

        let awards_page_resp = await awards_page_req;
        let awards_page_raw = await awards_page_resp.text();
        let awards_page = page_parser(awards_page_raw);
        data["awards"] = awards = awards_page("#content > div > div.article").html()
            .replace(/[ \n]/g, "")
            .replace(/<\/li><li>/g, "</li> <li>")
            .replace(/<\/a><span/g, "</a> <span")
            .replace(/<(div|ul)[^>]*>/g, "\n")
            .replace(/<[^>]+>/g, "")
            .replace(/&nbsp;/g, " ")
            .replace(/ +\n/g, "\n")
            .trim();

        if (imdb_api_req) {
            let imdb_api_resp = await imdb_api_req;
            let imdb_api_raw = await imdb_api_resp.text();
            let imdb_json = jsonp_parser(imdb_api_raw);

            if (imdb_json["resource"]) {
                data["imdb_rating_average"] = imdb_average_rating = imdb_json["resource"]["rating"] || 0;
                data["imdb_votes"] = imdb_votes = imdb_json["resource"]["ratingCount"] || 0;
                data["imdb_rating"] = imdb_rating = `${imdb_average_rating}/10 from ${imdb_votes} users`;
            }
        }

        // 生成format
        let descr = poster ? `[img]${poster}[/img]\n\n` : "";
        descr += trans_title ? `◎译　　名　${trans_title}\n` : "";
        descr += this_title ? `◎片　　名　${this_title}\n` : "";
        descr += year ? `◎年　　代　${year.trim()}\n` : "";
        descr += region ? `◎产　　地　${region}\n` : "";
        descr += genre ? `◎类　　别　${genre.join(" / ")}\n` : "";
        descr += language ? `◎语　　言　${language}\n` : "";
        descr += playdate ? `◎上映日期　${playdate.join(" / ")}\n` : "";
        descr += imdb_rating ? `◎IMDb评分  ${imdb_rating}\n` : "";
        descr += imdb_link ? `◎IMDb链接  ${imdb_link}\n` : "";
        descr += douban_rating ? `◎豆瓣评分　${douban_rating}\n` : "";
        descr += douban_link ? `◎豆瓣链接　${douban_link}\n` : "";
        descr += episodes ? `◎集　　数　${episodes}\n` : "";
        descr += duration ? `◎片　　长　${duration}\n` : "";
        descr += director && director.length > 0 ? `◎导　　演　${director.map(x => x['name']).join(" / ")}\n` : "";
        descr += writer && writer.length > 0 ? `◎编　　剧　${writer.map(x => x['name']).join(" / ")}\n` : "";
        descr += cast && cast.length > 0 ? `◎主　　演　${cast.map(x => x['name']).join("\n" + "　".repeat(4) + "  　").trim()}\n` : "";
        descr += tags && tags.length > 0 ? `\n◎标　　签　${tags.join(" | ")}\n` : "";
        descr += introduction ? `\n◎简　　介\n\n　　${introduction.replace(/\n/g, "\n" + "　".repeat(2))}\n` : "";
        descr += awards ? `\n◎获奖情况\n\n　　${awards.replace(/\n/g, "\n" + "　".repeat(2))}\n` : "";

        data["format"] = descr.trim();
        data["success"] = true; // 更新状态为成功
        return data;
    }
}

module.exports = {
    serach: search,
    gen_douban
}