{
  "version": 3,
  "sources": ["../../../static-src/chess/ts/chess-bot.ts", "../../../static-src/chess/ts/chess-main.ts"],
  "sourcesContent": ["import type { Square } from \"chess.js\"\n\n/**\n * @link https://github.com/official-stockfish/Stockfish/wiki/UCI-&-Commands\n */\n\nconst BEST_MOVE_UCI_ANSWER_PATTERN = /^bestmove ([a-h][1-8])([a-h][1-8])/\nconst SCORE_UCI_ANSWER_PATTERN = / score (cp|mate) (-?\\d+)/\n\nconst wasmSupported =\n    typeof WebAssembly === \"object\" &&\n    WebAssembly.validate(Uint8Array.of(0x0, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00))\nlet botChessEngineWorker: Worker | null = null\n\ntype WorkerEvent = Event & { data: string }\n\nexport async function playFromFEN(\n    fen: string,\n    depth: number,\n    botAssetsDataHolderElementId: string,\n    engineWorker: Worker | null = null,\n): Promise<[Square, Square]> {\n    if (!engineWorker) {\n        if (!botChessEngineWorker) {\n            const chessBotDataHolder = getBotAssetsDataHolderElementFromId(botAssetsDataHolderElementId)\n            botChessEngineWorker = await getChessEngineWorker(chessBotDataHolder)\n        }\n        engineWorker = botChessEngineWorker\n    }\n\n    // Fo each move we reset the engine with `ucinewgame` and `isready` commands,\n    // hoping to avoid any state from previous moves to affect the next move's result:\n    // since we have a \"pre-calculated in the Django Admin\" solution machinery,\n    // we choose to prioritise determinism over performance.\n    // (we're talking about a few milliseconds here, not a few seconds)\n    engineWorker.postMessage(\"ucinewgame\")\n    engineWorker.postMessage(\"isready\")\n    let startTime = 0\n\n    return new Promise((resolve, reject) => {\n        function onChessEngineMessage(e: WorkerEvent) {\n            console.debug(\"onChessEngineMessage\", e.data)\n            if (e.data.startsWith(\"readyok\")) {\n                engineWorker!.postMessage(`position fen ${fen}`)\n                engineWorker!.postMessage(`go depth ${depth}`)\n                startTime = Date.now()\n                return\n            }\n\n            const bestMoveAnswerMatch = BEST_MOVE_UCI_ANSWER_PATTERN.exec(e.data)\n            if (!bestMoveAnswerMatch) {\n                return\n            }\n\n            engineWorker!.removeEventListener(\"message\", onChessEngineMessage)\n            console.log(\n                `FEN ${fen}:`,\n                \"bestMoveAnswerMatch: \",\n                [bestMoveAnswerMatch[1], bestMoveAnswerMatch[2]],\n                `(in ${Math.round(Date.now() - startTime)}ms, depth ${depth})`,\n            )\n            resolve([bestMoveAnswerMatch[1] as Square, bestMoveAnswerMatch[2] as Square])\n        }\n\n        engineWorker!.addEventListener(\"message\", onChessEngineMessage)\n    })\n}\n\n// TODO: merge this function with the previous `playFromFEN` one\nexport async function getScoreFromFEN(\n    fen: string,\n    depth: number,\n    botAssetsDataHolderElementId: string,\n    engineWorker: Worker | null = null,\n): Promise<[\"cp\" | \"mate\", number]> {\n    if (!engineWorker) {\n        if (!botChessEngineWorker) {\n            const chessBotDataHolder = getBotAssetsDataHolderElementFromId(botAssetsDataHolderElementId)\n            botChessEngineWorker = await getChessEngineWorker(chessBotDataHolder)\n        }\n        engineWorker = botChessEngineWorker\n    }\n\n    engineWorker.postMessage(\"ucinewgame\")\n    engineWorker.postMessage(\"isready\")\n    let startTime = 0\n\n    return new Promise((resolve, reject) => {\n        function onChessEngineMessage(e: WorkerEvent) {\n            console.debug(\"onChessEngineMessage\", e.data)\n            if (e.data.startsWith(\"readyok\")) {\n                engineWorker!.postMessage(`position fen ${fen}`)\n                engineWorker!.postMessage(`go depth ${depth}`)\n                startTime = Date.now()\n                return\n            }\n\n            const scoreAnswerMatch = SCORE_UCI_ANSWER_PATTERN.exec(e.data)\n            if (!scoreAnswerMatch) {\n                return\n            }\n            botChessEngineWorker!.removeEventListener(\"message\", onChessEngineMessage)\n            console.log(\n                `FEN ${fen}:`,\n                \"scoreAnswerMatch: \",\n                scoreAnswerMatch[1],\n                scoreAnswerMatch[2],\n                `(in ${Math.round(Date.now() - startTime!)}ms)`,\n            )\n            resolve([scoreAnswerMatch[1] as \"cp\" | \"mate\", parseInt(scoreAnswerMatch[2], 10)])\n        }\n\n        engineWorker!.addEventListener(\"message\", onChessEngineMessage)\n    })\n}\n\nexport async function getChessEngineWorker(botAssetsDataHolderElement: HTMLElement): Promise<Worker> {\n    const chessBotData = JSON.parse(botAssetsDataHolderElement.dataset.chessEngineUrls!)\n    const engineWorkerScript = chessBotData[\"wasm\"] && wasmSupported ? chessBotData[\"wasm\"] : chessBotData[\"js\"]\n    const engineWorker = new Worker(engineWorkerScript)\n\n    return new Promise((resolve, reject) => {\n        function onChessEngineMessage(e: WorkerEvent) {\n            console.log(e.data)\n            if (!e.data.startsWith(\"uciok\")) {\n                return\n            }\n            engineWorker!.removeEventListener(\"message\", onChessEngineMessage)\n            resolve(engineWorker!)\n        }\n        engineWorker.addEventListener(\"message\", onChessEngineMessage)\n        engineWorker.postMessage(\"uci\")\n    })\n}\n\nexport function resetChessEngineWorker(): void {\n    if (!botChessEngineWorker) {\n        return\n    }\n    console.log(\"terminating bot's chess engine Worker\")\n    botChessEngineWorker.terminate()\n    botChessEngineWorker = null\n}\n\nfunction getBotAssetsDataHolderElementFromId(botAssetsDataHolderElementId: string): HTMLElement {\n    // See the `chess_bot_data` Python function for how it's generated\n    const chessBotDataHolder = document.getElementById(botAssetsDataHolderElementId)\n    if (!chessBotDataHolder) {\n        throw `no #${botAssetsDataHolderElementId} element found to read bot assets data!`\n    }\n    return chessBotDataHolder\n}\n", "import { playFromFEN, getChessEngineWorker, getScoreFromFEN, resetChessEngineWorker } from \"./chess-bot\"\n\n// @ts-ignore\nwindow.cursorIsNotOnChessBoardInteractiveElement = cursorIsNotOnChessBoardInteractiveElement\n// @ts-ignore\nwindow.playBotMove = playBotMove\n// @ts-ignore\nwindow.computeScore = computeScore\n// @ts-ignore\nwindow.resetChessEngineWorker = resetChessEngineWorker\n// @ts-ignore\nwindow.closeSpeechBubble = closeSpeechBubble\n// @ts-ignore\nwindow.__admin__playFromFEN = playFromFEN\n// @ts-ignore\nwindow.__admin__getChessEngineWorker = getChessEngineWorker\n\nfunction cursorIsNotOnChessBoardInteractiveElement(boardId: string): boolean {\n    // Must return `true` only if the user hasn't clicked on one of the game clickable elements.\n    // @link https://htmx.org/attributes/hx-trigger/\n    // (see our \"chess_arena\" Python component to see it used)\n\n    const chessBoardContainer = document.getElementById(`chess-arena-${boardId}`)\n\n    if (chessBoardContainer === null) {\n        return false // not much we can do, as it seems that this chess board has mysteriously disappeared \uD83E\uDD37\n    }\n\n    const chessBoardState = (chessBoardContainer.querySelector(\"[data-board-state]\") as HTMLElement).dataset\n        .boardState as string\n\n    console.log(\"chessBoardState; \", chessBoardState)\n\n    if (chessBoardState === \"waiting_for_player_selection\") {\n        return false // there's no current selection, so we actually have nothing to do here\n    }\n    if (chessBoardState === \"waiting_for_bot_turn\") {\n        // As we're 100% server-side-rendered in this 1st version, de-selecting a piece\n        // triggers a HTMX refresh of the board, which may conflict with the wait for\n        // the bot's move.\n        // --> let's not allow de-selecting a piece when it's the bot's turn.\n        return false\n    }\n\n    if (chessBoardState.includes(\"game_over\")) {\n        return false // the UI stops being interactive when the game is over\n    }\n\n    const hoveredElements = Array.from(document.querySelectorAll(\":hover\"))\n\n    const gamePiecesElements = chessBoardContainer.querySelectorAll(`#chess-board-pieces-${boardId} [data-piece-role]`)\n    for (const pieceElement of gamePiecesElements) {\n        if (hoveredElements.includes(pieceElement)) {\n            return false // don't actually cancel the selection\n        }\n    }\n    const selectedPieceTargetsElements = chessBoardContainer.querySelectorAll(\n        `#chess-board-available-targets-${boardId} [data-square]`,\n    )\n    for (const targetElement of selectedPieceTargetsElements) {\n        if (hoveredElements.includes(targetElement)) {\n            return false // ditto\n        }\n    }\n\n    const restartDailyChallengeButtonElement = chessBoardContainer.querySelector(\n        `#chess-board-restart-daily-challenge-${boardId}`,\n    )\n    if (restartDailyChallengeButtonElement && hoveredElements.includes(restartDailyChallengeButtonElement)) {\n        return false // don't actually cancel the selection when clicking on the \"restart daily challenge\" button\n    }\n\n    const speechBubble = getSpeechBubble()\n    if (speechBubble && hoveredElements.includes(speechBubble)) {\n        return false // don't actually cancel the selection when closing the speech bubble\n    }\n\n    const modalContainer = document.getElementById(\"modal-container\")\n    if (modalContainer && hoveredElements.includes(modalContainer)) {\n        return false // don't actually cancel the selection when interacting with a modal\n    }\n\n    console.log(\"no interactive UI element clicked: we reset the board state\")\n    return true\n}\n\ntype BotMoveDescription = {\n    fen: string\n    htmxElementId: string\n    botAssetsDataHolderElementId: string\n    forcedMove: [string, string] | null\n    depth: number\n}\n\nfunction playBotMove({\n    fen,\n    htmxElementId,\n    botAssetsDataHolderElementId,\n    forcedMove,\n    depth,\n}: BotMoveDescription): void {\n    const htmxElement = document.getElementById(htmxElementId)\n    if (!htmxElement) {\n        throw `no #${botAssetsDataHolderElementId} element found to play bot's move!`\n    }\n\n    const doPlayBotMove = (from: string, to: string) => {\n        const targeUrlPattern = htmxElement.dataset.hxPost!\n        const targeUrl = targeUrlPattern.replace(\"<from>\", from).replace(\"<to>\", to)\n        htmxElement.dataset.hxPost = targeUrl\n        window.htmx.process(htmxElement)\n        window.htmx.trigger(htmxElement, \"playMove\", {})\n    }\n\n    if (forcedMove) {\n        doPlayBotMove(forcedMove[0], forcedMove[1])\n        return\n    }\n\n    playFromFEN(fen, depth, botAssetsDataHolderElementId).then((move) => {\n        console.log(`bot wants to move from ${move[0]} to ${move[1]}`)\n        doPlayBotMove(move[0], move[1])\n    })\n}\n\nfunction computeScore(fen: string, botAssetsDataHolderElementId: string): Promise<[\"cp\" | \"mate\", number]> {\n    return getScoreFromFEN(fen, 2, botAssetsDataHolderElementId).then(([type, score]) => {\n        console.log(`Chess engine says score is ${score} (type: ${type})`)\n        return [type, score]\n    })\n}\n\nfunction closeSpeechBubble(speechBubbleId?: string): void {\n    const speechBubble = getSpeechBubble(speechBubbleId)\n    if (speechBubble?.parentNode) {\n        speechBubble.remove()\n    }\n}\n\nfunction getSpeechBubble(speechBubbleId?: string): Element | null {\n    const speechBubble = document.querySelector(\"[data-speech-bubble]\")\n    if (speechBubbleId && speechBubble?.dataset.speechBubbleId !== speechBubbleId) {\n        return null // avoid closing a speech bubble that doesn't match the provided unique ID\n    }\n    return speechBubble\n}\n"],
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  "names": ["BEST_MOVE_UCI_ANSWER_PATTERN", "SCORE_UCI_ANSWER_PATTERN", "wasmSupported", "botChessEngineWorker", "playFromFEN", "fen", "depth", "botAssetsDataHolderElementId", "engineWorker", "chessBotDataHolder", "getBotAssetsDataHolderElementFromId", "getChessEngineWorker", "startTime", "resolve", "reject", "onChessEngineMessage", "e", "bestMoveAnswerMatch", "getScoreFromFEN", "scoreAnswerMatch", "botAssetsDataHolderElement", "chessBotData", "engineWorkerScript", "resetChessEngineWorker", "cursorIsNotOnChessBoardInteractiveElement", "playBotMove", "computeScore", "resetChessEngineWorker", "closeSpeechBubble", "playFromFEN", "getChessEngineWorker", "boardId", "chessBoardContainer", "chessBoardState", "hoveredElements", "gamePiecesElements", "pieceElement", "selectedPieceTargetsElements", "targetElement", "restartDailyChallengeButtonElement", "speechBubble", "getSpeechBubble", "modalContainer", "fen", "htmxElementId", "botAssetsDataHolderElementId", "forcedMove", "depth", "htmxElement", "doPlayBotMove", "from", "to", "targeUrl", "move", "getScoreFromFEN", "type", "score", "speechBubbleId"]
}