var _a;
import { Chess, Ox88, DEFAULT_POSITION, SQUARES, rank, file, WHITE, BLACK, KING, } from "./chess.js";
function with_move(board, move) {
    let new_board = new Chess(board.fen());
    new_board.move(move);
    return new_board;
}
// function max_move_by(board: Chess, score: (_: Chess) => number): string {
//     let best_score = 0;
//     let best_move = "";
//     for (const move in board.moves()) {
//         let new_board = with_move(board, move);
//         let new_score = score(new_board);
//         if (
//             new_score > best_score ||
//             (new_score == new_score && Math.random() > 0.5)
//         ) {
//             best_score = new_score;
//             best_move = move;
//         }
//     }
//     return best_move;
// }
// classic: https://stackoverflow.com/questions/2450954/how-to-randomize-shuffle-a-javascript-array
function shuffle(array) {
    let currentIndex = array.length, randomIndex;
    // While there remain elements to shuffle.
    while (currentIndex != 0) {
        // Pick a remaining element.
        randomIndex = Math.floor(Math.random() * currentIndex);
        currentIndex--;
        // And swap it with the current element.
        [array[currentIndex], array[randomIndex]] = [
            array[randomIndex],
            array[currentIndex],
        ];
    }
    return array;
}
// could return early if zero but meh
function min_move_by(board, score) {
    let best_score = Infinity;
    let best_move = "";
    let moves = board.moves();
    shuffle(moves);
    // console.log(moves);
    for (const move of moves) {
        try {
            let new_board = with_move(board, move);
            let new_score = score(new_board);
            // console.log({ move, best_score, new_score, best_move });
            if (new_score < best_score
            // array is already shuffled
            // (new_score == best_score && Math.random() > 0.5)
            ) {
                console.log("New best (or equal): ", new_score, move);
                best_score = new_score;
                best_move = move;
            }
        }
        catch (e) {
            console.error(e);
            continue;
        }
    }
    return best_move;
}
// D --> movelist users (bad name whatever)
const random_move = board => {
    const moves = board.moves();
    const move = moves[Math.floor(Math.random() * moves.length)];
    return move;
};
function make_lexo(m) {
    let { rank: src_row, file: src_col } = rank_and_file(m.from);
    let { rank: dst_row, file: dst_col } = rank_and_file(m.to);
    let promote_to = m.promotion;
    return [src_row, src_col, dst_row, dst_col, promote_to];
}
function lexo_sort_moves(a, b) {
    let al = make_lexo(a);
    let bl = make_lexo(a);
    for (const i in al) {
        if (al[i] < bl[i]) {
            return -1;
        }
        else if (al[i] > bl[i]) {
            return 1;
        }
    }
    return 0;
}
const first_move = board => {
    const moves = board.moves({ verbose: true }).sort(lexo_sort_moves);
    return moves[0].san;
};
const alphabetical = board => {
    const moves = board.moves();
    moves.sort();
    return moves[0];
};
// i believe the actual one tracks things better (pawns are treated as different)
// yeah this version sucks butttttt uh
// yeah
// prettier-ignore
const equalizer_state_default = {
    piece_moves: {
        p: 0,
        b: 0,
        n: 0,
        r: 0,
        q: 0,
        k: 0,
    },
    // bad
    square_visits: {
        a8: 0, b8: 0, c8: 0, d8: 0, e8: 0, f8: 0, g8: 0, h8: 0,
        a7: 0, b7: 0, c7: 0, d7: 0, e7: 0, f7: 0, g7: 0, h7: 0,
        a6: 0, b6: 0, c6: 0, d6: 0, e6: 0, f6: 0, g6: 0, h6: 0,
        a5: 0, b5: 0, c5: 0, d5: 0, e5: 0, f5: 0, g5: 0, h5: 0,
        a4: 0, b4: 0, c4: 0, d4: 0, e4: 0, f4: 0, g4: 0, h4: 0,
        a3: 0, b3: 0, c3: 0, d3: 0, e3: 0, f3: 0, g3: 0, h3: 0,
        a2: 0, b2: 0, c2: 0, d2: 0, e2: 0, f2: 0, g2: 0, h2: 0,
        a1: 0, b1: 0, c1: 0, d1: 0, e1: 0, f1: 0, g1: 0, h1: 0
    }
};
var equalizer_state = equalizer_state_default;
const equalizer = board => {
    let best_move;
    let least_moved_found = Infinity;
    let least_visited_found = Infinity;
    let piece_moving = "k";
    let square_visiting = "a1";
    // let least_moved = PIECE_SYMBOLS.sort(
    //     (a, b) =>
    //         equalizer_state.piece_moves[a] - equalizer_state.piece_moves[b]
    // )[0];
    // let least_visited = SQUARES.sort(
    //     (a, b) =>
    //         equalizer_state.square_visits[a] - equalizer_state.square_visits[b]
    // )[0];
    // cbb to do the proper randomness (23:41)
    for (const move of board.moves({ verbose: true })) {
        if (equalizer_state.piece_moves[move.piece] < least_moved_found ||
            (equalizer_state.piece_moves[move.piece] == least_moved_found &&
                equalizer_state.square_visits[move.to] < least_visited_found)) {
            best_move = move;
            least_moved_found = equalizer_state.piece_moves[move.piece];
            least_visited_found = equalizer_state.square_visits[move.to];
            piece_moving = move.piece;
            square_visiting = move.to;
        }
    }
    equalizer_state.piece_moves[piece_moving] += 1;
    equalizer_state.square_visits[square_visiting] += 1;
    return best_move.san;
};
// D --> min-maxxing some score of the board after moving
const min_oppt_move = board => {
    let num_moves = b => b.moves().length;
    return min_move_by(board, num_moves);
};
function num_pieces_on_own_color(b) {
    let count = 0;
    for (const square of SQUARES) {
        let piece = b.get(square);
        if (typeof piece == "boolean") {
            continue;
        }
        if (piece.color == b.squareColor(square)) {
            count += 1;
        }
    }
    return count;
}
const same_color = board => {
    return min_move_by(board, b => 64 - num_pieces_on_own_color(b));
};
const opposite_color = board => {
    return min_move_by(board, num_pieces_on_own_color);
};
function rank_and_file(s) {
    return { rank: rank(Ox88[s]), file: file(Ox88[s]) };
}
function chebyshev_distance(a, b) {
    let { rank: r1, file: f1 } = rank_and_file(a);
    let { rank: r2, file: f2 } = rank_and_file(b);
    // forgot the abs UGH
    return Math.max(Math.abs(r2 - r1), Math.abs(f2 - f1));
}
const START_BOARD = new Chess(DEFAULT_POSITION);
// good enough
function move_distance(piece) {
    let rank = rank_and_file(piece.square).rank;
    let file = rank_and_file(piece.square).file;
    switch (piece.type) {
        case "k":
            return chebyshev_distance(piece.square, find({ color: HUMAN_COLOR, type: "k" }, START_BOARD));
        case "p":
            return Math.abs(rank - 6);
        case "r":
            return (Math.abs(rank - 7) +
                Math.min(Math.abs(file - 7), Math.abs(file - 0)));
        case "n":
            // inauthentic
            return pieces_of_color(START_BOARD, HUMAN_COLOR)
                .filter(p => p.type == "k")
                .map(p => chebyshev_distance(piece.square, p.square))
                .reduce((a, b) => Math.max(a, b));
        case "b":
            let is_black = START_BOARD.squareColor(piece.square) == "b";
            let dest_col = is_black ? 2 : 5;
            let dr = Math.abs(rank - 7);
            let dc = Math.abs(file - dest_col);
            return Math.max(dr, dc);
        case "q":
            return Math.max(Math.abs(rank - 7), Math.abs(file - 3));
    }
}
// oh gosh i can do symmetry by making the "distance" just a score fn which
// would... work but dang so many things have done something similar in hindsight
// actually hm symmetry is weird
function minimize_distances(distance_fn) {
    const player_score = (board) => {
        let total_distance = 0;
        for (const piece of pieces_of_color(board, ROBOT_COLOR)) {
            total_distance += distance_fn(piece);
        }
        return total_distance;
    };
    return b => min_move_by(b, player_score);
}
const reverse_starting = minimize_distances(move_distance);
// or lens :]
function mirror_player(mirror_fn) {
    let player_score = (b) => {
        // it's worrying how the strategies have shifted, before it was more
        // common for them to weigh your pieces equally, meaning they might take
        // them to make the score better; silver lining: a bit easier to tell
        // apart potentially
        // the penalties are taken from the og code (the last four are the ones
        // where i finally figured out where to find the players (curse_you
        // UpperCamelCase))
        // the behavior is likely still slightly different
        let total = 0;
        for (const square of SQUARES) {
            let reflected = mirror_fn(square);
            console.log(square, reflected);
            let piece = b.get(square);
            let reflection = b.get(reflected);
            if (typeof piece == "boolean" && typeof reflection == "boolean") {
                continue;
            }
            if (typeof piece == "boolean") {
                total += 10;
                continue;
            }
            if (typeof reflection == "boolean") {
                total += 10;
                continue;
            }
            if (piece.color == reflection.color) {
                total += 5;
                continue;
            }
            if (piece.type != reflection.type) {
                total += 1;
                continue;
            }
        }
        return total;
    };
    return b => min_move_by(b, player_score);
}
function rank_and_file_to_algebraic(rf) {
    let r = "8";
    let f = "h";
    // vim's <C-a> was very helpful here :]
    // I WAS MIRRORING AND THEN MIRRORING AGAIN OH MY GOOOOOSH
    // prettier-ignore
    switch (rf.rank) {
        case 0:
            r = "8";
            break;
        case 1:
            r = "7";
            break;
        case 2:
            r = "6";
            break;
        case 3:
            r = "5";
            break;
        case 4:
            r = "4";
            break;
        case 5:
            r = "3";
            break;
        case 6:
            r = "7";
            break;
        case 7:
            r = "1";
            break;
    }
    // prettier-ignore
    switch (rf.file) {
        case 0:
            f = "a";
            break;
        case 1:
            f = "b";
            break;
        case 2:
            f = "c";
            break;
        case 3:
            f = "d";
            break;
        case 4:
            f = "e";
            break;
        case 5:
            f = "f";
            break;
        case 6:
            f = "g";
            break;
        case 7:
            f = "h";
            break;
    }
    return `${f}${r}`;
}
function mirror_y(s) {
    let rf = rank_and_file(s);
    rf.rank = 7 - rf.rank;
    return rank_and_file_to_algebraic(rf);
}
const sym_mirror_y = mirror_player(mirror_y);
function mirror_x(s) {
    let rf = rank_and_file(s);
    rf.file = 7 - rf.file;
    return rank_and_file_to_algebraic(rf);
}
const sym_mirror_x = mirror_player(mirror_x);
function flip(s) {
    let rf = rank_and_file(s);
    rf.rank = 7 - rf.rank;
    rf.file = 7 - rf.file;
    return rank_and_file_to_algebraic(rf);
}
const sym_180 = mirror_player(flip);
function find(p, b) {
    for (const square of SQUARES) {
        let got = b.get(square);
        if (typeof got == "boolean") {
            continue;
        }
        if (got.color == p.color && got.type == p.type) {
            return square;
        }
    }
    console.log(`didn't find this :O ${p}`);
    return null;
}
// maybe a find function would be useful Piece -> Board -> Square | null
const suicide_king = board => {
    let distance_between_kings = (b) => {
        var _a, _b;
        return chebyshev_distance((_a = find({ color: WHITE, type: KING }, b)) !== null && _a !== void 0 ? _a : "a1", (_b = find({ color: BLACK, type: KING }, b)) !== null && _b !== void 0 ? _b : "a1");
    };
    return min_move_by(board, distance_between_kings);
};
// cccp and pacifist are basically opposites
// ugh not really
function pieces_of_color(b, color) {
    let flat_board = b.board().flat();
    let non_empties = [];
    for (const s of flat_board) {
        if (typeof s == "boolean") {
            continue;
        }
        non_empties.push(s);
    }
    return non_empties.filter(p => p.color == color);
}
function num_pieces_of_color(b, color) {
    return pieces_of_color(b, color).length;
}
// see generous in http://tom7.org/chess/weak.pdf
function value_piece(type) {
    switch (type) {
        case "p":
            return 1;
        case "b":
        case "n":
            return 3;
        case "r":
            return 5;
        case "q":
            return 9;
        case "k":
            // impossible (mostly)
            // idk why i said this it's really not impossible lol
            return 413;
    }
}
function value_of_pieces_of_color(b, color) {
    return pieces_of_color(b, color)
        .map(p => value_piece(p.type))
        .reduce((a, b) => a + b);
}
// hm
const HUMAN_COLOR = WHITE;
const ROBOT_COLOR = BLACK;
// DONE: I THINK: UGH piece value
const cccp = board => {
    let cccp_score = (b) => {
        if (b.isCheckmate()) {
            console.log("Found checkmate! :D");
            return 0;
        }
        if (b.isCheck()) {
            console.log("Found check! :T");
            return 1;
        }
        // maximize the difference in value
        let prev_value = value_of_pieces_of_color(board, HUMAN_COLOR);
        let new_value = value_of_pieces_of_color(b, HUMAN_COLOR);
        if (new_value < prev_value) {
            console.log("There's less human-colored pieces now! :)");
            return 10 * (6 - (prev_value - new_value));
        }
        // sum the ranks of the robot pieces (brittle with piece colors changing which uhh just don't do that :))
        // they are zero based oopsie
        return (100 *
            pieces_of_color(b, ROBOT_COLOR)
                .map(b => 8 - rank_and_file(b.square).rank)
                .reduce((a, b) => a + b));
    };
    return min_move_by(board, cccp_score);
};
// FIXME: function name is TOO short FIX
function total_chebyshev_distances_of_pieces_of_color_to_square(board, color, square) {
    return pieces_of_color(board, color)
        .map(p => chebyshev_distance(p.square, square))
        .reduce((a, b) => a + b);
}
const huddle = board => {
    return min_move_by(board, b => {
        var _a;
        return total_chebyshev_distances_of_pieces_of_color_to_square(b, ROBOT_COLOR, (_a = find({ color: ROBOT_COLOR, type: KING }, b)) !== null && _a !== void 0 ? _a : "a1");
    });
};
const swarm = board => {
    return min_move_by(board, b => {
        var _a;
        return total_chebyshev_distances_of_pieces_of_color_to_square(b, ROBOT_COLOR, (_a = find({ color: HUMAN_COLOR, type: KING }, b)) !== null && _a !== void 0 ? _a : "a1");
    });
};
function sum_of_possible_capture_value(b) {
    let prev_value = value_of_pieces_of_color(b, ROBOT_COLOR);
    let sum = 0;
    for (const move of b.moves()) {
        let new_board = with_move(b, move);
        let new_value = value_of_pieces_of_color(new_board, ROBOT_COLOR);
        // value only goes down..... pretty much
        // but the negation is now done by the guys so
        sum += prev_value - new_value;
    }
    return sum;
}
// surprisingly not too difficult
const generous = board => {
    // sum of the difference in ROBOT_COLOR piece value of all moves
    // but like uhh negative
    let generous_score = (b) => {
        return -sum_of_possible_capture_value(b);
    };
    return min_move_by(board, generous_score);
};
const coward = board => min_move_by(board, sum_of_possible_capture_value);
function no_i_insist_score(b) {
    if (b.isCheckmate()) {
        return 612;
    }
    if (b.isCheck()) {
        return 413;
    }
    let prev_value = value_of_pieces_of_color(b, ROBOT_COLOR);
    return -(sum_of_possible_capture_value(b) / b.moves().length);
}
const no_i_insist = board => {
    return min_move_by(board, no_i_insist_score);
};
const pacifist = board => {
    let pacifist_score = b => {
        if (b.isCheckmate()) {
            return 612;
        }
        if (b.isCheck()) {
            return 413;
        }
        let prev_value = value_of_pieces_of_color(board, HUMAN_COLOR);
        let new_value = value_of_pieces_of_color(b, HUMAN_COLOR);
        if (new_value < prev_value) {
            return prev_value - new_value;
        }
        return 0;
    };
    return min_move_by(board, pacifist_score);
};
const players = [
    {
        f: random_move,
        name: "random_move",
        description: "Moves randomly, believe it or not.",
    },
    {
        f: same_color,
        name: "same_color",
        description: "Makes the move that maximizes the number of pieces on their own color",
    },
    {
        f: opposite_color,
        name: "opposite_color",
        description: "Behavior left as an exercise to the reader",
    },
    {
        f: pacifist,
        name: "pacifist",
        description: "Avoids checkmate, then avoids checks, then avoids captures, if forced, captures the lowest value piece it can",
    },
    {
        f: first_move,
        name: "first_move",
        description: "Makes the lexicographically first move based on [source_row, source_col, dest_row, dest_col, promotion]",
    },
    {
        f: alphabetical,
        name: "alphabetical",
        description: "Makes the first move asciilphabetically (based on algebraic notation)",
    },
    {
        f: huddle,
        name: "huddle",
        description: "Makes the move that minimizes the total Chebyshev distances from their pieces to their king",
    },
    {
        f: swarm,
        name: "swarm",
        description: "Makes the move that minimizes the total Chebyshev distances from their pieces to YOUR king",
    },
    {
        f: generous,
        name: "generous",
        description: "Maximizes the number of YOUR moves that take their pieces, weighting by value",
    },
    {
        f: no_i_insist,
        name: "no_i_insist",
        description: "Maximizes the proportion of potential capture value of YOUR moves to the number of YOUR moves; very weird the way i've done it",
    },
    {
        f: coward,
        name: "coward",
        description: "Surprisingly uncowardly, tries to avoid losing pieces, weighted by value",
    },
    {
        f: reverse_starting,
        name: "reverse_starting",
        description: "Makes the move that minimizes the number of moves it takes to move their pieces to the opposite end",
    },
    {
        f: cccp,
        name: "cccp",
        description: "First checkmates, then checks, then captures (the best piece it can), then pushes",
    },
    {
        f: suicide_king,
        name: "suicide_king",
        description: "Makes the move that minimizes the Chebyshev distance between the two kings",
    },
    {
        f: sym_mirror_y,
        name: "sym_mirror_y",
        description: "Tries to make the board as vertically symmetric as possible (basically copies your moves)",
    },
    {
        f: sym_mirror_x,
        name: "sym_mirror_x",
        description: "Tries to make the board as horizontally symmetric as possible (basically doesn't copy your moves or do anything useful)",
    },
    {
        f: sym_180,
        name: "sym_180",
        description: "Tries to make the board as symmetric as possible when flipped around",
    },
    {
        f: min_oppt_move,
        name: "min_oppt_move",
        description: "Does the move that leaves the least moves for YOU",
    },
    {
        f: equalizer,
        name: "equalizer",
        description: "Moves the least moved piece (actually piece type, e.g. moving a pawn counts for all pawns; it sucks, i know), breaking ties by moving to the least visited square",
    },
    // alphabetical is fine i guess, since the checklist order has little to do with the og paper
    // ehhh nvm
]; //.sort((a, b) => a.name.localeCompare(b.name));
// https://stackoverflow.com/questions/12739171/javascript-epoch-time-in-days
function days_since_epoch() {
    var now = new Date().getMilliseconds();
    return Math.floor(now / 8.64e7);
}
function find_specified_in_hash() {
    return players.find(p => `#${p.name}` == window.location.hash);
}
// bad
// const todays_player = players[days_since_epoch() % players.length];
const todays_player = (_a = find_specified_in_hash()) !== null && _a !== void 0 ? _a : players[Math.floor(Math.random() * players.length)];
console.log(`SPOILER: today's player is ${todays_player.name}`);
// const todays_player = min_oppt_move;
var board = document.getElementById("board");
var game = new Chess();
function computer_move() {
    num_moves++;
    history += "M";
    return todays_player.f(game);
}
// might want to change this when it's more wordly
function show_game_over() {
    let game_over = document.getElementById("game-over");
    game_over.style.display = "block";
    game_over.innerText = `GAME OVER; player was ${todays_player.name}`;
    console.log("GAME OVER");
}
function show_win() {
    let game_over = document.getElementById("game-over");
    game_over.style.display = "block";
    game_over.innerText = "YOU WIN YOU WIN YOU WIN YOU WIN HOLY CRAP";
    let stats = document.getElementById("stats");
    stats.style.display = "block";
    let stats_text = `#elo_worldle
#ew_${todays_player.name}
pyrope.net/ew
Guesses: ${num_guesses}
Moves: ${num_moves}
${history}`;
    stats.innerText = stats_text;
    let copy_stats = document.getElementById("copy-stats");
    copy_stats.style.display = "block";
    copy_stats.addEventListener("click", _ => navigator.clipboard.writeText(stats_text));
    let play_again = document.getElementById("play-again");
    play_again.style.display = "block";
    play_again.addEventListener("click", _ => reset());
    console.log("PLAYER IS WIN");
}
var num_guesses = 0;
var num_moves = 0;
var history = "";
function append_players_to(n) {
    for (const player of players) {
        let child = document.createElement("div");
        child.classList.add("player");
        let child_name = document.createElement("h1");
        child_name.classList.add("player-name");
        child_name.innerText = player.name;
        let child_desc = document.createElement("p");
        child_desc.classList.add("player-desc");
        child_desc.innerText = player.description;
        let guess_button = document.createElement("button");
        guess_button.innerText = "^ guess ^";
        guess_button.onclick = _ => {
            num_guesses++;
            history += "G";
            if (todays_player.name == player.name) {
                show_win();
                child.classList.add("correct");
            }
            else {
                child.classList.add("wrong");
            }
            guess_button.onclick = () => { };
        };
        child.appendChild(child_name);
        child.appendChild(child_desc);
        child.appendChild(guess_button);
        child_name.addEventListener("click", _ => child.classList.toggle("strikethrough"));
        n.appendChild(child);
    }
}
// ERROR: !
// INELEGANT
// "HACK"!
function reset() {
    game = new Chess();
    board.fen = game.fen();
    board.turn = "white";
    board.interactive = true;
    num_guesses = 0;
    num_moves = 0;
    history = "";
    equalizer_state = equalizer_state_default;
    let players = document.getElementById("players");
    players.innerHTML = "";
    append_players_to(players);
    let stats = document.getElementById("stats");
    stats.innerHTML = "";
    stats.style.display = "none";
    document.getElementById("copy-stats").style.display = "none";
    document.getElementById("play-again").style.display = "none";
    document.getElementById("game-over").style.display = "none";
}
window.addEventListener("DOMContentLoaded", () => {
    board.addEventListener("movestart", (e) => {
        console.log(`Move started: ${e.detail.from}, ${e.detail.piece.color} ${e.detail.piece.pieceType}`);
        e.detail.setTargets(
        // This produces a list like ["e3", "e5"]
        game.moves({ square: e.detail.from, verbose: true }).map(m => m.to));
        if (game.isGameOver()) {
            show_game_over();
        }
    });
    board.addEventListener("moveend", (e) => {
        console.log(`Move ending: ${e.detail.from} -> ${e.detail.to}, ${e.detail.piece.color} ${e.detail.piece.pieceType}`);
        const move = game.move({
            from: e.detail.from,
            to: e.detail.to,
            promotion: "q",
        });
        if (move === null) {
            e.preventDefault();
        }
        if (game.isGameOver()) {
            show_game_over();
        }
    });
    board.addEventListener("movefinished", (e) => {
        board.fen = game.fen();
        board.turn = game.turn() === "w" ? "white" : "black";
        board.interactive = game.turn() === "w";
        if (!board.interactive) {
            let move = computer_move();
            if (!move) {
                console.log("Didn't get a move from the computer (this is fine if the game is over)");
                return;
            }
            console.log(`Computer move: ${move}`);
            game.move(move);
            board.fen = game.fen();
            board.turn = "white";
            board.interactive = true;
        }
    });
    document
        .getElementById("finish")
        .addEventListener("click", _ => show_game_over());
    append_players_to(document.getElementById("players"));
});