console.log(window.location.protocol);

var url = `${window.location.protocol}//${window.location.hostname}/_larpix`;
var params = new URLSearchParams(window.location.search);

const collapseDmsBtn = document.getElementById("collapse-dms");
const collapseGroupsBtn = document.getElementById("collapse-groups");

const addDmBtn = document.getElementById("add-dm-btn");
const addGroupBtn = document.getElementById("add-group-btn");

const sidebarHome = document.getElementById("sidebar-home");
const sidebarHomeButton = sidebarHome.children.item(1);
const sidebarHomeIndicator = sidebarHome.children.item(0);

const sidebarAdd = document.getElementById("sidebar-add");
const sidebarAddButton = sidebarAdd.children.item(1);
const sidebarAddIndicator = sidebarAdd.children.item(0);

const roomDetailsBar = document.getElementById("roomdetailsbar");
const roomContent = document.getElementsByTagName("roomcontent")[0];
const roomsBar = document.getElementById("roomsbar");
const sideBar = document.getElementsByTagName("sidebar")[0];

const roomContentMain = document.getElementsByTagName("roomcontent2")[0];

const roomContentBar = roomContent.children[0];



function delay(time) {
    return new Promise(resolve => setTimeout(resolve, time));
}
async function packetEncPass(pass, key, username) {
    return await encryptWithNonce(pass, key, getNonce(username, key));
}

async function getNonce(username, key) {
    
    let nonce;
    let fetchRes = await (await fetch(`${url}/nextnonce?u=${username}`)).text();

    try {
        nonce = await decryptString(fetchRes, key);
    }
    catch(err) {
        nonce = await decryptString(fetchRes, "");
    }
    return nonce;
}

async function encryptWithNonce(value, key, nonce) {
    return await encryptString(value, nonce + key);
}

async function calcCommunicationKeyClient(p, g, pubServer) {
    const secretClientBytes = window.crypto.getRandomValues(new Uint8Array(512));
    const secretClient = BigInt('0x' + Array.from(secretClientBytes).map(b => b.toString(16).padStart(2, '0')).join(''));
    const pubClient = power(BigInt(g), secretClient, BigInt(p));
    const sharedSecret = power(BigInt(pubServer), secretClient, BigInt(p));

    let sharedSecretStr = sharedSecret.toString(16);

    if (sharedSecretStr.length % 2 !== 0) {
        sharedSecretStr = '0' + sharedSecretStr;
    }

    const sharedSecretBytes = new Uint8Array(sharedSecretStr.match(/.{1,2}/g).map(byte => parseInt(byte, 16)));

    const hashBuffer = await window.crypto.subtle.digest('SHA-256', sharedSecretBytes);
    const aesKey = new Uint8Array(hashBuffer);

    return [pubClient.toString(), aesKey];
}

function keyDataFromServerJson(jsonFromServer) {
    const data = JSON.parse(jsonFromServer);

    const p = BigInt(data.p);
    const g = BigInt(data.g);
    const pubServer = BigInt(data.pubServer);

    return [p, g, pubServer, data.idKey]
}

function  base64ToUint8(base64) {
    return Uint8Array.from(atob(base64), c => c.charCodeAt(0));
}
function uint8ToBase64(uint8) {
    return fixBase64Padding(btoa(String.fromCharCode(...uint8)));
} 

async function encrypt(plainText, keyBytes) {
    const iv = window.crypto.getRandomValues(new Uint8Array(16));
    const encoder = new TextEncoder();
    const data = encoder.encode(plainText);

    const cryptoKey = await window.crypto.subtle.importKey(
        "raw", keyBytes, "AES-CBC", false, ["encrypt"]
    );

    const encryptedContent = await window.crypto.subtle.encrypt(
        {name: "AES-CBC", iv: iv},
        cryptoKey,
        data
    );
    const result = new Uint8Array(iv.length + encryptedContent.byteLength);
    result.set(iv);
    result.set(new Uint8Array(encryptedContent), iv.length);

    return uint8ToBase64(result);
}

async function decrypt(cipherTextBase64, keyBytes) {
    const fullData = base64ToUint8(cipherTextBase64);
    const iv = fullData.slice(0, 16);
    const cipherData = fullData.slice(16);

    const cryptoKey = await window.crypto.subtle.importKey(
        "raw", keyBytes, "AES-CBC", false, ["decrypt"]
    );

    const decrypted = await window.crypto.subtle.decrypt(
        {name: "AES-CBC", iv: iv},
        cryptoKey,
        cipherData
    );

    return new TextDecoder().decode(decrypted);
}


async function getCryptoKey(passphrase) {
    const encoder = new TextEncoder();
    const data = encoder.encode(passphrase);
    const hash = await crypto.subtle.digest('SHA-256', data);
    return await crypto.subtle.importKey('raw', hash, {name: 'AES-CBC'}, false, ['encrypt', 'decrypt']);
}

async function encryptBytes(plainBytes, passphrase) {
    const key = await getCryptoKey(passphrase);
    const iv = crypto.getRandomValues(new Uint8Array(16));

    const encryptedContent = await crypto.subtle.encrypt(
        {name: 'AES-CBC', iv: iv},
        key,
        plainBytes
    );

    const result = new Uint8Array(iv.length + encryptedContent.byteLength);
    result.set(iv);
    result.set(new Uint8Array(encryptedContent), iv.length);
    return result;
}

async function decryptBytes(combinedBytes, passphrase) {
    const key = await getCryptoKey(passphrase);
    const iv = combinedBytes.slice(0, 16);
    const data = combinedBytes.slice(16);

    const decryptedContent = await crypto.subtle.decrypt(
        {name: 'AES-CBC', iv: iv},
        key,
        data
    );

    return new Uint8Array(decryptedContent);
}

async function encryptString(plainText, passphrase) {
    const encoder = new TextEncoder();
    const data = encoder.encode(plainText);
    const pwHash = await crypto.subtle.digest('SHA-256', encoder.encode(passphrase));

    const key = await crypto.subtle.importKey(
        'raw', pwHash, {name: 'AES-CBC'}, false, ['encrypt']
    );

    const iv = crypto.getRandomValues(new Uint8Array(16));
    const encrypted = await crypto.subtle.encrypt(
        {name: 'AES-CBC', iv: iv},
        key,
        data
    );

    const combined = new Uint8Array(iv.length + encrypted.byteLength);
    combined.set(iv);
    combined.set(new Uint8Array(encrypted), iv.length);

    return fixBase64Padding(btoa(String.fromCharCode(...combined)));
}

async function decryptString(base64Text, passphrase) {
    const encoder = new TextEncoder();
    const combined = new Uint8Array(atob(base64Text).split("").map(c => c.charCodeAt(0)));

    const pwHash = await crypto.subtle.digest('SHA-256', encoder.encode(passphrase));
    const key = await crypto.subtle.importKey(
        'raw', pwHash, {name: 'AES-CBC'}, false, ['decrypt']
    );

    const iv = combined.slice(0, 16);
    const data = combined.slice(16);

    const decrypted = await crypto.subtle.decrypt(
        {name: 'AES-CBC', iv: iv},
        key,
        data
    );

    return new TextDecoder().decode(decrypted);
}


async function fetchPost(url, value) {
    let response = await fetch(url, {
        method: "POST",
        credentials: "omit",
        body: value,
        headers: {
            "secret": await encryptWithNonce(passwordHash, passwordHash, await getNonce(username, passwordHash))
        }
    });
    let data = await response.text();
    return data;
}

async function fetchPostEnc(url, value) {
    let nonce = await getNonce(username, passwordHash);
    let response = await fetch(url, {
        method: "POST",
        credentials: "omit",
        body: await encryptWithNonce(value, passwordHash, nonce),
        headers: {
            "secret": await encryptWithNonce(passwordHash, passwordHash, nonce)
        }
    });
    let data = await response.text();
    return data;
}

async function fetchAsync(url) {
    let response = await fetch(url, {
        method: "GET", 
        credentials: "omit"
    });
    
    let data = await response.text();
    return data;
}

async function fetchAsyncWAuth(url) {
    let response = await fetch(url, {
        method: "GET",
        credentials: "omit",
        headers: {
            "secret": await encryptWithNonce(passwordHash, passwordHash, await getNonce(username, passwordHash))
        }
    });

    let data = await response.text();
    return data;
}

async function getServerInfo(host){
    console.log(`${window.location.protocol}//${host}/_larpix/serverinfo`)
    return JSON.parse(await fetchAsync(`${window.location.protocol}//${host}/_larpix/serverinfo`));
}

async function Auth(username, password) {
 
   
    let passwordHash =  await hashSHA3_512(password);
    let response = await fetch(`${url}/auth?u=${username}`, {
        method: "GET",
        credentials: "omit",
        headers: {
            "secret": await encryptWithNonce(passwordHash, passwordHash, await getNonce(username, passwordHash))
        }
    });

    let data = await response.text();
    return data;

}


async function fetchEncrypted(request, body)
{

    let nonce = await getNonce(username, passwordHash);
    
    let response = await fetch(`${url}/encryptedrequest?u=${username}`, {
        method: "POST",
        credentials: "omit",
        body: await encryptWithNonce(

            JSON.stringify({
                string1: request,
                string2: body
            })

            , passwordHash, nonce),
        headers: {
            "secret": await encryptWithNonce(passwordHash, passwordHash, nonce)
        }
    });
    let data = await response.text();
    return decryptString(data, passwordHash);
}

function power(base, exponent, mod) {
    let res = 1n;
    base = base % mod;
    while (exponent > 0n) {
        if (exponent % 2n === 1n) res = (res * base) % mod;
        base = (base * base) % mod;
        exponent = exponent / 2n;
    }
    return res;
}

function fixBase64Padding(base64String) {
    let str = base64String.replace(/-/g, '+').replace(/_/g, '/');
    const pad = str.length % 4;

    if (pad) {
        if (pad === 1) {
            throw new Error("");
        }
        str += '='.repeat(4 - pad);
    }

    return str;
}

function showNotification(message, type = 'info', duration = 3500) {
    let container = document.getElementById('notification-container');
    if (!container) {
        container = document.createElement('div');
        container.id = 'notification-container';
        document.body.appendChild(container);
    }

    const notif = document.createElement('div');
    notif.className = `notification ${type}`;
    notif.textContent = message;

    container.appendChild(notif);

    requestAnimationFrame(() => {
        requestAnimationFrame(() => {
            notif.classList.add('show');
        });
    });

    setTimeout(() => {
        notif.classList.remove('show');

        notif.addEventListener('transitionend', () => {
            notif.remove();
        });
    }, duration);
}


function showAction(message, actionid) {
    let container = document.getElementById('notification-container');
    if (!container) {
        container = document.createElement('div');
        container.id = 'notification-container';
        document.body.appendChild(container);
    }

    const notif = document.createElement('div');
    notif.className = `notification action`;
    notif.textContent = message;
    notif.id = `notification-${actionid}`;

    container.appendChild(notif);

    requestAnimationFrame(() => {
        requestAnimationFrame(() => {
            notif.classList.add('show');
        });
    });
}
function clearAction(actionid) {

    let notif = document.getElementById(`notification-${actionid}`);
    notif.classList.remove('show');

    notif.addEventListener('transitionend', () => {
        notif.remove();
    });
}


async function hashSHA3_512(input) {
    const encoder = new TextEncoder();
    const data = encoder.encode(input); 
    const hashBuffer = await crypto.subtle.digest('SHA-512', data); //-3 kiedys xddddddddddddddddd
    const hashArray = Array.from(new Uint8Array(hashBuffer)); 
    const hashHex = hashArray.map(b => b.toString(16).padStart(2, '0')).join(''); 
    return hashHex; 
}



var password = "";
var username = "";
var passwordHash = "";
var host = "";
async function mainJS()
{
    username = localStorage.getItem('username');
    password = localStorage.getItem('password');
    host = localStorage.getItem('host');
    passwordHash = await hashSHA3_512(password);
    url = `${window.location.protocol}//${host}/_larpix`;
}
mainJS();

collapseDmsBtn.addEventListener("click", () => {
    collapseDmsBtn.classList.toggle("collapsed");
});
collapseGroupsBtn.addEventListener("click", () => {
    collapseGroupsBtn.classList.toggle("collapsed");
});

addDmBtn.addEventListener("click", () => {
    roomContentMain.innerHTML = 
        `
        <div style="display: flex;justify-content: center;align-items: center;height:100%;flex-direction: column;">
            <svg xmlns="http://www.w3.org/2000/svg" width="3rem" viewBox="0 -960 960 960" fill="var(--text-color)"><path d="M120-160v-600q0-33 23.5-56.5T200-840h480q33 0 56.5 23.5T760-760v203q-10-2-20-2.5t-20-.5q-10 0-20 .5t-20 2.5v-203H200v400h283q-2 10-2.5 20t-.5 20q0 10 .5 20t2.5 20H240L120-160Zm160-440h320v-80H280v80Zm0 160h200v-80H280v80Zm400 280v-120H560v-80h120v-120h80v120h120v80H760v120h-80ZM200-360v-400 400Z"/></svg>
            <herotitle>Add Chat</herotitle>
            <p>Add a private, encrypted chat by entering a username</p>
        </div>
        `
});
addGroupBtn.addEventListener("click", () => {
    
});



sidebarHomeButton.addEventListener("mouseenter", () => {
    sidebarHomeIndicator.classList.add("hover");
});
sidebarHomeButton.addEventListener("mouseleave", () => {
    sidebarHomeIndicator.classList.remove("hover");
});

sidebarAddButton.addEventListener("mouseenter", () => {
    sidebarAddIndicator.classList.add("hover");
});
sidebarAddButton.addEventListener("mouseleave", () => {
    sidebarAddIndicator.classList.remove("hover");
});