import Service from 'resource:///com/github/Aylur/ags/service.js';
import * as Utils from 'resource:///com/github/Aylur/ags/utils.js';

import Gio from 'gi://Gio';
import GLib from 'gi://GLib';
import Soup from 'gi://Soup?version=3.0';
import { fileExists } from '../modules/.miscutils/files.js';
if(!fileExists(`${GLib.get_user_config_dir()}/gemini_history.json`))
{
	Utils.execAsync([`bash`, `-c`,`touch ${GLib.get_user_config_dir()}/gemini_history.json`]).catch(print);
       Utils.writeFile('[ ]', `${GLib.get_user_config_dir()}/gemini_history.json`).catch(print);
}
// read gemini_history.json
const readfile = Utils.readFile(`${GLib.get_user_config_dir()}/gemini_history.json`)
const history_chat = JSON.parse(readfile)
const initMessages = history_chat
// api key 
Utils.exec(`mkdir -p ${GLib.get_user_cache_dir()}/ags/user/ai`);
const KEY_FILE_LOCATION = `${GLib.get_user_cache_dir()}/ags/user/ai/google_key.txt`;
const APIDOM_FILE_LOCATION = `${GLib.get_user_cache_dir()}/ags/user/ai/google_api_dom.txt`;
function replaceapidom(URL) {
    if (fileExists(APIDOM_FILE_LOCATION)) {
        var contents = Utils.readFile(APIDOM_FILE_LOCATION).trim();
        var URL = URL.toString().replace("generativelanguage.googleapis.com", contents);
    }
    return URL;
}
const CHAT_MODELS = ["gemini-pro"]
const ONE_CYCLE_COUNT = 3;

class GeminiMessage extends Service {
    static {
        Service.register(this,
            {
                'delta': ['string'],
            },
            {
                'content': ['string'],
                'thinking': ['boolean'],
                'done': ['boolean'],
            });
    }

    _role = '';
    _parts = [{ text: '' }];
    _thinking = false;
    _done = false;
    _rawData = '';

    constructor(role, content, thinking = false, done = false) {
        super();
        this._role = role;
        this._parts = [{ text: content }];
        this._thinking = thinking;
        this._done = done;
    }

    get rawData() { return this._rawData }
    set rawData(value) { this._rawData = value }

    get done() { return this._done }
    set done(isDone) { this._done = isDone; this.notify('done') }

    get role() { return this._role }
    set role(role) { this._role = role; this.emit('changed') }

    get content() {
        return this._parts.map(part => part.text).join();
    }
    set content(content) {
        this._parts = [{ text: content }];
        this.notify('content')
        this.emit('changed')
    }

    get parts() { return this._parts }

    get label() { return this._parserState.parsed + this._parserState.stack.join('') }

    get thinking() { return this._thinking }
    set thinking(thinking) {
        this._thinking = thinking;
        this.notify('thinking')
        this.emit('changed')
    }

    addDelta(delta) {
        if (this.thinking) {
            this.thinking = false;
            this.content = delta;
        }
        else {
            this.content += delta;
        }
        this.emit('delta', delta);
    }

    parseSection() {
        if(this._thinking) {
            this._thinking = false;
            this._parts[0].text= '';
        }
        const parsedData = JSON.parse(this._rawData);
        const delta = parsedData.candidates[0].content.parts[0].text;
        this._parts[0].text += delta;
        // this.emit('delta', delta);
        this.notify('content');
        this._rawData = '';
    }
}

class GeminiService extends Service {
    static {
        Service.register(this, {
            'initialized': [],
            'clear': [],
            'newMsg': ['int'],
            'hasKey': ['boolean'],
        });
    }

    _assistantPrompt = true;
    _messages = [];
    _cycleModels = true;
    _requestCount = 0;
    _temperature = userOptions.ai.defaultTemperature;
    _modelIndex = 0;
    _key = '';
    _decoder = new TextDecoder();

    constructor() {
        super();

        if (fileExists(KEY_FILE_LOCATION)) this._key = Utils.readFile(KEY_FILE_LOCATION).trim();
        else this.emit('hasKey', false);

        if (this._assistantPrompt) this._messages = [...initMessages];
        else this._messages = [];

        this.emit('initialized');
    }

    get modelName() { return CHAT_MODELS[this._modelIndex] }

    get keyPath() { return KEY_FILE_LOCATION }
    get key() { return this._key }
    set key(keyValue) {
        this._key = keyValue;
        Utils.writeFile(this._key, KEY_FILE_LOCATION)
            .then(this.emit('hasKey', true))
            .catch(err => print(err));
    }

    get cycleModels() { return this._cycleModels }
    set cycleModels(value) {
        this._cycleModels = value;
        if (!value) this._modelIndex = 0;
        else {
            this._modelIndex = (this._requestCount - (this._requestCount % ONE_CYCLE_COUNT)) % CHAT_MODELS.length;
        }
    }

    get temperature() { return this._temperature }
    set temperature(value) { this._temperature = value; }

    get messages() { return this._messages }
    get lastMessage() { return this._messages[this._messages.length - 1] }

    clear() {
        if (this._assistantPrompt)
            this._messages = [...initMessages];
        else
            this._messages = [];
        this.emit('clear');
    }

    get assistantPrompt() { return this._assistantPrompt; }
    set assistantPrompt(value) {
        this._assistantPrompt = value;
        if (value) this._messages = [...initMessages];
        else this._messages = [];
    }

    readResponse(stream, aiResponse) {
        stream.read_line_async(
            0, null,
            (stream, res) => {
                try {
                    const [bytes] = stream.read_line_finish(res);
                    const line = this._decoder.decode(bytes);
                    if (line == '[{') { // beginning of response
                        aiResponse._rawData += '{';
                        this.thinking = false;
                    }
                    else if (line == ',\u000d' || line == ']') { // end of stream pulse
                        aiResponse.parseSection();
                    }
                    else // Normal content
                        aiResponse._rawData += line;

                    this.readResponse(stream, aiResponse);
                } catch {
                    aiResponse.done = true;
                    			// the way to save all the history messages for gemini 
			Utils.writeFile(JSON.stringify(this._messages.map(msg => { let m = { role: msg.role, parts: msg.parts }; return m; })),`${GLib.get_user_config_dir()}/gemini_history.json`);
                    return;
                }
            });
    }

    addMessage(role, message) {
        this._messages.push(new GeminiMessage(role, message));
        this.emit('newMsg', this._messages.length - 1);
    }

    send(msg) {
        this._messages.push(new GeminiMessage('user', msg));
        this.emit('newMsg', this._messages.length - 1);
        const aiResponse = new GeminiMessage('model', 'thinking...', true, false)

        const body =
        {
            "contents": this._messages.map(msg => { let m = { role: msg.role, parts: msg.parts }; return m; }),
            // "safetySettings": [
            //     { category: "HARM_CATEGORY_DEROGATORY", threshold: "BLOCK_NONE", },
            //     { category: "HARM_CATEGORY_HARASSMENT", threshold: "BLOCK_NONE", },
            //     { category: "HARM_CATEGORY_HATE_SPEECH", threshold: "BLOCK_NONE", },
            //     { category: "HARM_CATEGORY_SEXUALLY_EXPLICIT", threshold: "BLOCK_NONE", },
            //     { category: "HARM_CATEGORY_UNSPECIFIED", threshold: "BLOCK_NONE", },
            // ],
            "generationConfig": {
                "temperature": this._temperature,
            },
            // "key": this._key,
            // "apiKey": this._key,
        };

        const session = new Soup.Session();
        const message = new Soup.Message({
            method: 'POST',
            uri: GLib.Uri.parse(replaceapidom(`https://generativelanguage.googleapis.com/v1/models/${this.modelName}:streamGenerateContent?key=${this._key}`), GLib.UriFlags.NONE),
        });
        message.request_headers.append('Content-Type', `application/json`);
        message.set_request_body_from_bytes('application/json', new GLib.Bytes(JSON.stringify(body)));

        session.send_async(message, GLib.DEFAULT_PRIORITY, null, (_, result) => {
            const stream = session.send_finish(result);
            this.readResponse(new Gio.DataInputStream({
                close_base_stream: true,
                base_stream: stream
            }), aiResponse);
        });
        this._messages.push(aiResponse);
        this.emit('newMsg', this._messages.length - 1);

        if (this._cycleModels) {
            this._requestCount++;
            if (this._cycleModels)
                this._modelIndex = (this._requestCount - (this._requestCount % ONE_CYCLE_COUNT)) % CHAT_MODELS.length;
        }
    }
}

export default new GeminiService();