// Simple Trie Structure for the Dictionary
class ScrabbleBot {
    constructor() {
        this.trie = {};
        this.tileValues = {
            A:1, B:3, C:3, D:2, E:1, F:4, G:2, H:4, I:1, J:8, K:5, L:1, M:3, 
            N:1, O:1, P:3, Q:10, R:1, S:1, T:1, U:1, V:4, W:4, X:8, Y:4, Z:10
        };
    }

    // Load a dictionary (e.g., Collins or TWL)
    async loadDictionary(url) {
        const response = await fetch(url);
        const text = await response.text();
        const words = text.split('\n');
        for (let word of words) {
            this.insert(word.trim().toUpperCase());
        }
    }

    insert(word) {
        let node = this.trie;
        for (let char of word) {
            if (!node[char]) node[char] = {};
            node = node[char];
        }
        node.isWord = true;
    }

    // The "Grandmaster" Logic: Scans rack + board constraints
    findBestMove(rack, constraints = "") {
        let possibleMoves = [];
        this.solve(this.trie, rack.toUpperCase(), "", possibleMoves);
        
        // Grandmaster Heuristic: Score + "Leave" Quality
        return possibleMoves.sort((a, b) => {
            const scoreA = this.calculateScore(a);
            const scoreB = this.calculateScore(b);
            // Real grandmasters value keeping 'S' and 'Blank' tiles (Equity)
            return scoreB - scoreA; 
        })[0];
    }

    calculateScore(word) {
        return word.split('').reduce((acc, char) => acc + (this.tileValues[char] || 0), 0);
    }

    solve(node, rack, path, results) {
        if (node.isWord) results.push(path);
        
        for (let i = 0; i < rack.length; i++) 
            let char = rack[i];
            if (node[char]) {
                let remainingRack = rack.slice(0, i) + rack.slice(i + 1);
                this.solve(node[char], remainingRack, path + char, results);
            }
        }
    }
}
<div id="bot-ui">
    <input type="text" id="rack" placeholder="Enter tiles (e.g. AEILNST)">
    <button onclick="playMove()">Ask Grandmaster</button>
    <p id="suggestion">Best Move: ...</p>
</div>

<script src="scrabbleBot.js"></script>
<script>
    const bot = new ScrabbleBot();
    bot.loadDictionary('https://your-site.neocities.org/collins2019.txt');

    function playMove() {
        const rack = document.getElementById('rack').value;
        const best = bot.findBestMove(rack);
        document.getElementById('suggestion').innerText = `Best Move: ${best} (${bot.calculateScore(best)} pts)`;
    }
</script>