// 乐彩百家乐悬浮按钮组件，负责拖动位置持久化和打开游戏面板。

const BACCARAT_FAB_STORAGE_KEY = "baccarat_fab_pos";

/**
 * 安全读取悬浮按钮上次保存的位置。
 *
 * @returns {{x?: number, y?: number}|null}
 */
function readSavedBaccaratFabPosition() {
    try {
        return JSON.parse(localStorage.getItem(BACCARAT_FAB_STORAGE_KEY) || "null");
    } catch (error) {
        return null;
    }
}

/**
 * 创建百家乐悬浮按钮 Alpine 组件。
 *
 * @returns {Record<string, any>}
 */
export function baccaratFab() {
    const saved = readSavedBaccaratFabPosition();

    return {
        visible: false,
        posX: saved?.x ?? 18,
        posY: saved?.y ?? 90,
        dragging: false,
        _startX: 0,
        _startY: 0,
        _origX: 0,
        _origY: 0,
        _moved: false,

        /**
         * 开始拖动悬浮按钮。
         *
         * @param {PointerEvent} event 指针事件
         * @returns {void}
         */
        startDrag(event) {
            this.dragging = true;
            this._moved = false;
            this._startX = event.clientX;
            this._startY = event.clientY;
            this._origX = this.posX;
            this._origY = this.posY;
            event.currentTarget.setPointerCapture?.(event.pointerId);
        },

        /**
         * 拖动过程中约束按钮不超出视口。
         *
         * @param {PointerEvent} event 指针事件
         * @returns {void}
         */
        onDrag(event) {
            if (!this.dragging) {
                return;
            }

            const dx = event.clientX - this._startX;
            const dy = event.clientY - this._startY;

            if (Math.abs(dx) > 3 || Math.abs(dy) > 3) {
                this._moved = true;
            }

            this.posX = Math.max(4, Math.min(window.innerWidth - 60, this._origX - dx));
            this.posY = Math.max(4, Math.min(window.innerHeight - 60, this._origY + dy));
        },

        /**
         * 结束拖动；没有移动时按点击处理并打开面板。
         *
         * @returns {void}
         */
        endDrag() {
            if (!this.dragging) {
                return;
            }

            this.dragging = false;
            localStorage.setItem(BACCARAT_FAB_STORAGE_KEY, JSON.stringify({
                x: this.posX,
                y: this.posY,
            }));

            if (!this._moved) {
                this.openPanel();
            }
        },

        /**
         * 打开百家乐面板，并恢复当前局倒计时。
         *
         * @returns {void}
         */
        openPanel() {
            const panel = document.getElementById("baccarat-panel");

            if (!panel || typeof window.Alpine?.$data !== "function") {
                return;
            }

            const panelState = window.Alpine.$data(panel);
            panelState.show = true;
            panelState.loadCurrentRound();

            // 重新打开面板时，如果仍在下注阶段，需要恢复本地倒计时。
            if (panelState.phase === "betting" && panelState.countdown > 0 && !panelState.countdownTimer) {
                panelState.startCountdown();
            }
        },
    };
}

/**
 * 挂载百家乐悬浮按钮全局组件名，兼容 Blade 的 x-data。
 *
 * @returns {void}
 */
export function bindBaccaratFabControls() {
    if (typeof window === "undefined") {
        return;
    }

    window.baccaratFab = baccaratFab;
}