{% extends "base.html" %}
{% block title %}Hash Generator - EveryTools{% endblock %}
{% block top_title %}Hash Generator{% endblock %}

{% block content %}
<div class="client-tool">
    <div class="tool-header">
        <h1>Hash Generator</h1>
        <p>Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text</p>
    </div>

    <div class="form-group">
        <label>Input Text</label>
        <textarea id="hash-input" class="text-input" rows="4" placeholder="Enter text to hash..." oninput="computeHashes()"></textarea>
    </div>

    <div id="hash-results" style="display:grid;gap:.8rem">
        <div class="calc-section" id="hash-md5-section">
            <div class="pane-header" style="margin:-1.2rem -1.2rem .5rem;padding:.4rem .8rem">
                <span>MD5</span>
                <button class="btn btn-small" onclick="copyHash('hash-md5')"><i class="bi bi-clipboard"></i></button>
            </div>
            <code id="hash-md5" style="word-break:break-all;font-size:.85rem;color:var(--text-light)">-</code>
        </div>
        <div class="calc-section">
            <div class="pane-header" style="margin:-1.2rem -1.2rem .5rem;padding:.4rem .8rem">
                <span>SHA-1</span>
                <button class="btn btn-small" onclick="copyHash('hash-sha1')"><i class="bi bi-clipboard"></i></button>
            </div>
            <code id="hash-sha1" style="word-break:break-all;font-size:.85rem;color:var(--text-light)">-</code>
        </div>
        <div class="calc-section">
            <div class="pane-header" style="margin:-1.2rem -1.2rem .5rem;padding:.4rem .8rem">
                <span>SHA-256</span>
                <button class="btn btn-small" onclick="copyHash('hash-sha256')"><i class="bi bi-clipboard"></i></button>
            </div>
            <code id="hash-sha256" style="word-break:break-all;font-size:.85rem;color:var(--text-light)">-</code>
        </div>
        <div class="calc-section">
            <div class="pane-header" style="margin:-1.2rem -1.2rem .5rem;padding:.4rem .8rem">
                <span>SHA-512</span>
                <button class="btn btn-small" onclick="copyHash('hash-sha512')"><i class="bi bi-clipboard"></i></button>
            </div>
            <code id="hash-sha512" style="word-break:break-all;font-size:.85rem;color:var(--text-light)">-</code>
        </div>
    </div>
</div>
{% endblock %}

{% block scripts %}
<script>
async function computeHashes() {
    const text = document.getElementById("hash-input").value;
    if (!text) {
        ["md5","sha1","sha256","sha512"].forEach(h => document.getElementById("hash-" + h).textContent = "-");
        return;
    }

    const data = new TextEncoder().encode(text);

    // Web Crypto API for SHA family
    const sha1 = await digest("SHA-1", data);
    const sha256 = await digest("SHA-256", data);
    const sha512 = await digest("SHA-512", data);

    // MD5 via pure JS (Web Crypto doesn't support it)
    const md5 = md5Hash(text);

    document.getElementById("hash-md5").textContent = md5;
    document.getElementById("hash-sha1").textContent = sha1;
    document.getElementById("hash-sha256").textContent = sha256;
    document.getElementById("hash-sha512").textContent = sha512;
}

async function digest(algo, data) {
    const buf = await crypto.subtle.digest(algo, data);
    return Array.from(new Uint8Array(buf)).map(b => b.toString(16).padStart(2, "0")).join("");
}

function copyHash(id) {
    const text = document.getElementById(id).textContent;
    if (text !== "-") navigator.clipboard.writeText(text);
}

// MD5 implementation (RFC 1321)
function md5Hash(string) {
    function md5cycle(x, k) {
        let a = x[0], b = x[1], c = x[2], d = x[3];
        a = ff(a,b,c,d,k[0],7,-680876936); d = ff(d,a,b,c,k[1],12,-389564586);
        c = ff(c,d,a,b,k[2],17,606105819); b = ff(b,c,d,a,k[3],22,-1044525330);
        a = ff(a,b,c,d,k[4],7,-176418897); d = ff(d,a,b,c,k[5],12,1200080426);
        c = ff(c,d,a,b,k[6],17,-1473231341); b = ff(b,c,d,a,k[7],22,-45705983);
        a = ff(a,b,c,d,k[8],7,1770035416); d = ff(d,a,b,c,k[9],12,-1958414417);
        c = ff(c,d,a,b,k[10],17,-42063); b = ff(b,c,d,a,k[11],22,-1990404162);
        a = ff(a,b,c,d,k[12],7,1804603682); d = ff(d,a,b,c,k[13],12,-40341101);
        c = ff(c,d,a,b,k[14],17,-1502002290); b = ff(b,c,d,a,k[15],22,1236535329);
        a = gg(a,b,c,d,k[1],5,-165796510); d = gg(d,a,b,c,k[6],9,-1069501632);
        c = gg(c,d,a,b,k[11],14,643717713); b = gg(b,c,d,a,k[0],20,-373897302);
        a = gg(a,b,c,d,k[5],5,-701558691); d = gg(d,a,b,c,k[10],9,38016083);
        c = gg(c,d,a,b,k[15],14,-660478335); b = gg(b,c,d,a,k[4],20,-405537848);
        a = gg(a,b,c,d,k[9],5,568446438); d = gg(d,a,b,c,k[14],9,-1019803690);
        c = gg(c,d,a,b,k[3],14,-187363961); b = gg(b,c,d,a,k[8],20,1163531501);
        a = gg(a,b,c,d,k[13],5,-1444681467); d = gg(d,a,b,c,k[2],9,-51403784);
        c = gg(c,d,a,b,k[7],14,1735328473); b = gg(b,c,d,a,k[12],20,-1926607734);
        a = hh(a,b,c,d,k[5],4,-378558); d = hh(d,a,b,c,k[8],11,-2022574463);
        c = hh(c,d,a,b,k[11],16,1839030562); b = hh(b,c,d,a,k[14],23,-35309556);
        a = hh(a,b,c,d,k[1],4,-1530992060); d = hh(d,a,b,c,k[4],11,1272893353);
        c = hh(c,d,a,b,k[7],16,-155497632); b = hh(b,c,d,a,k[10],23,-1094730640);
        a = hh(a,b,c,d,k[13],4,681279174); d = hh(d,a,b,c,k[0],11,-358537222);
        c = hh(c,d,a,b,k[3],16,-722521979); b = hh(b,c,d,a,k[6],23,76029189);
        a = hh(a,b,c,d,k[9],4,-640364487); d = hh(d,a,b,c,k[12],11,-421815835);
        c = hh(c,d,a,b,k[15],16,530742520); b = hh(b,c,d,a,k[2],23,-995338651);
        a = ii(a,b,c,d,k[0],6,-198630844); d = ii(d,a,b,c,k[7],10,1126891415);
        c = ii(c,d,a,b,k[14],15,-1416354905); b = ii(b,c,d,a,k[5],21,-57434055);
        a = ii(a,b,c,d,k[12],6,1700485571); d = ii(d,a,b,c,k[3],10,-1894986606);
        c = ii(c,d,a,b,k[10],15,-1051523); b = ii(b,c,d,a,k[1],21,-2054922799);
        a = ii(a,b,c,d,k[8],6,1873313359); d = ii(d,a,b,c,k[15],10,-30611744);
        c = ii(c,d,a,b,k[6],15,-1560198380); b = ii(b,c,d,a,k[13],21,1309151649);
        a = ii(a,b,c,d,k[4],6,-145523070); d = ii(d,a,b,c,k[11],10,-1120210379);
        c = ii(c,d,a,b,k[2],15,718787259); b = ii(b,c,d,a,k[9],21,-343485551);
        x[0] = add32(a,x[0]); x[1] = add32(b,x[1]); x[2] = add32(c,x[2]); x[3] = add32(d,x[3]);
    }
    function cmn(q,a,b,x,s,t) { a = add32(add32(a,q),add32(x,t)); return add32((a<<s)|(a>>>(32-s)),b); }
    function ff(a,b,c,d,x,s,t) { return cmn((b&c)|((~b)&d),a,b,x,s,t); }
    function gg(a,b,c,d,x,s,t) { return cmn((b&d)|(c&(~d)),a,b,x,s,t); }
    function hh(a,b,c,d,x,s,t) { return cmn(b^c^d,a,b,x,s,t); }
    function ii(a,b,c,d,x,s,t) { return cmn(c^(b|(~d)),a,b,x,s,t); }
    function md51(s) {
        const n = s.length;
        let state = [1732584193,-271733879,-1732584194,271733878], i;
        for (i=64; i<=n; i+=64) md5cycle(state, md5blk(s.substring(i-64,i)));
        s = s.substring(i-64);
        const tail = [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0];
        for (i=0; i<s.length; i++) tail[i>>2] |= s.charCodeAt(i)<<((i%4)<<3);
        tail[i>>2] |= 0x80<<((i%4)<<3);
        if (i>55) { md5cycle(state,tail); for (i=0; i<16; i++) tail[i]=0; }
        tail[14] = n*8;
        md5cycle(state, tail);
        return state;
    }
    function md5blk(s) {
        const md5blks = []; for (let i=0; i<64; i+=4) md5blks[i>>2] = s.charCodeAt(i)+(s.charCodeAt(i+1)<<8)+(s.charCodeAt(i+2)<<16)+(s.charCodeAt(i+3)<<24);
        return md5blks;
    }
    function add32(a,b) { return (a+b) & 0xFFFFFFFF; }
    function rhex(n) { let s=""; for (let j=0; j<4; j++) s += "0123456789abcdef".charAt((n>>(j*8+4))&0x0F) + "0123456789abcdef".charAt((n>>(j*8))&0x0F); return s; }
    function hex(x) { return x.map(rhex).join(""); }
    // Encode as UTF-8 bytes for correct hashing
    const utf8 = unescape(encodeURIComponent(string));
    return hex(md51(utf8));
}
</script>
{% endblock %}