import { xxh64 } from "@node-rs/xxhash";
import { encode } from "html-entities";
import { JSDOM } from "jsdom";
import util from "util";
import fs from "fs";

Array.prototype.random = function(){return this[Math.floor(Math.random() * this.length)]}

var cache = {};
var log = null;

export default function(client) {
  client.logEvent = null;

  client.cache = {
    get: (key) => {
      return cache[key] ?? null;
    },
    set: (key, value) => {
      cache[key] = value;
      fs.writeFileSync("data/cache.json", JSON.stringify(cache));
    }
  }

  client.config = {
    get: (key) => {
      var configFile = "data/" + xxh64(key).toString(16) + ".json";
      var configData = {};
      if(fs.existsSync(configFile)) {
          configData = JSON.parse(fs.readFileSync(configFile));
      }

      var configObject = {
        get: (key) => {
          return configData[key] ?? null;
        },
        set: (key, value) => {
          configData[key] = value;
          fs.writeFileSync(configFile, JSON.stringify(configData));
        }
      };

      return configObject;
    }
  }

  client.reply = function(event, text, html) {
    var content = event.getContent();

    var mcontent = {
      format: "org.matrix.custom.html",
      formatted_body: "<mx-reply><blockquote><a href=\"https://m.posm.gay/#/" + event.event.room_id + "/" + event.event.event_id + "?via=possum.city\">In reply to</a> <a href=\"https://m.posm.gay/#/" + event.sender.userId + "\">" + event.sender.userId + "</a><br>" + (content.formatted_body ?? content.body) + "</blockquote></mx-reply>" + (html ?? text).trim(),
      body: "> <" + event.sender.userId + "> " + content.body.split("\n")[0] + "\n\n" + text.trim(),
      msgtype: "m.notice",
      "m.relates_to": {
        "m.in_reply_to": {
          "event_id": event.event.event_id
        }
      }
    };

    client.sendEvent(event.event.room_id, "m.room.message", mcontent, "", (err, res) => {
      console.log(err);
    });
  }

  client.logData = [];
  client.startup = new Date();

  client.updateLog = async function() {
    if(log && (log.body == client.logData.join("\n") || log["m.new_content"]?.body == client.logData.join("\n"))) {
      setTimeout(client.updateLog, 1000);
      return;
    }

    var mcontent = {
      format: "org.matrix.custom.html",
      formatted_body: `<pre><code>[client:logger] started: ${client.startup}\n${encode(client.logData.join("\n"))}</code></pre>`,
      body: client.logData.join("\n"),
      msgtype: "m.notice"
    }

    if(!client.logEvent) {
      log = mcontent;
    } else {
      log["m.new_content"] = mcontent;
      log["m.relates_to"] = {
        rel_type: "m.replace",
        event_id: client.logEvent
      }
    }

    var x = await client.sendEvent(process.env.LOG_CHANNEL, "m.room.message", log, "", (err, res) => {
      console.log("[client:log]", res);
      console.error(err);
    });

    client.logEvent = client.logEvent ?? x.event_id;

    setTimeout(client.updateLog, 1000);
  }

  client.log = function() {
    var data = util.format.apply(null, arguments);
    client.logData.push(data);
    console.log(data);
  }

  client.error = client.log;

  client.uploadBuffer = async function(buffer) {
    var hash = xxh64(buffer).toString(16);
    var matrixUrl = client.cache.get(hash);

    if(!matrixUrl) {
      const uploadResponse = await client.uploadContent(buffer, { rawResponse: false });
      matrixUrl = uploadResponse.content_uri;
      client.cache.set(hash, matrixUrl);
    }

    return matrixUrl;
  }

  client.uploadMedia = async function(url) {
    const buffer = await fetch(url, {
      headers: {
        "User-Agent": "PossumBot/1.0 (+https://bot.possum.city/)"
      }
    }).then((res) => res.arrayBuffer()).then((buf) => Buffer.from(buf));

    return client.uploadBuffer(buffer);
/*    var matrixUrl = client.cache.get(url);
    if(!matrixUrl) {
      const buffer = await fetch(url, {
        headers: {
          "User-Agent": "PossumBot/1.0 (+https://bot.possum.city/)",
        },
      }).then((res) => res.arrayBuffer()).then((buf) => Buffer.from(buf));
      const uploadResponse = await client.uploadContent(buffer, { rawResponse: false });
      matrixUrl = uploadResponse.content_uri;
      client.cache.set(url, matrixUrl);
    }
    return matrixUrl;*/
  }

  if(fs.existsSync("data/cache.json")) {
    var data = fs.readFileSync("data/cache.json");

    try {
      cache = JSON.parse(data);
      client.log("[sdkext:cache]", 'loaded', Object.keys(cache).length, 'cache entries!');
    } catch(err) {
      client.error("[sdkext:cache]", err);
    }
  }

  process.on('uncaughtException', function (err) {
    console.error('[core:err]', err);
  });

  client.updateLog();
}