import { _decorator, Component, Node, Label, Sprite, RichText, tween, Vec3 } from 'cc';

const { ccclass, property } = _decorator;

@ccclass('DialogueBox')
export class DialogueBox extends Component {
    @property(Label)
    nameLabel: Label;

    @property(RichText)
    textRichText: RichText;

    @property(Sprite)
    nameBg: Sprite;

    @property(Node)
    continueIndicator: Node;

    private currentText: string = '';
    private currentSpeaker: string = '';
    private typingInterval: number = null;
    private onCompleteCallback: () => void = null;
    private typingSpeed: number = 30; // 毫秒每个字符

    onLoad() {
        this.nameBg = this.nameLabel.node.parent.getComponent(Sprite);
    }

    start() {
        // 默认隐藏
        this.node.active = false;
    }

    /**
     * 显示对话
     */
    show(speaker: string | undefined, text: string, onComplete?: () => void) {
        this.node.active = true;
        this.currentText = text;
        this.currentSpeaker = speaker || '';
        this.onCompleteCallback = onComplete || null;

        // 设置角色名
        if (this.currentSpeaker) {
            this.nameLabel.string = this.currentSpeaker;
            this.nameBg.node.active = true;
        } else {
            this.nameBg.node.active = false;
        }

        // 隐藏继续提示
        if (this.continueIndicator) {
            this.continueIndicator.active = false;
        }

        // 开始打字机效果
        this.typewriterEffect(text);
    }

    /**
     * 打字机效果
     */
    private typewriterEffect(text: string) {
        // 清除之前的定时器
        if (this.typingInterval) {
            clearInterval(this.typingInterval);
        }

        let index = 0;
        this.textRichText.string = '';

        this.typingInterval = window.setInterval(() => {
            if (index < text.length) {
                // 使用 RichText 来支持富文本
                this.textRichText.string = this.escapeXml(text.substring(0, index + 1));
                index++;
            } else {
                this.finishTyping();
            }
        }, this.typingSpeed);
    }

    /**
     * 完成打字（立即显示完整文本）
     */
    finishTyping() {
        if (this.typingInterval) {
            clearInterval(this.typingInterval);
            this.typingInterval = null;
        }

        this.textRichText.string = this.escapeXml(this.currentText);
        
        // 显示继续提示
        if (this.continueIndicator) {
            this.continueIndicator.active = true;
            this.playContinueIndicatorAnim();
        }

        // 回调
        if (this.onCompleteCallback) {
            this.onCompleteCallback();
        }
    }

    /**
     * 播放继续提示动画
     */
    private playContinueIndicatorAnim() {
        if (!this.continueIndicator) return;

        // 简单的上下浮动动画
        tween(this.continueIndicator)
            .repeatForever(
                tween()
                    .to(0.5, { position: new Vec3(0, 10, 0) })
                    .to(0.5, { position: new Vec3(0, 0, 0) })
            )
            .start();
    }

    /**
     * 隐藏对话框
     */
    hide() {
        this.node.active = false;
        if (this.typingInterval) {
            clearInterval(this.typingInterval);
            this.typingInterval = null;
        }
    }

    /**
     * 重置
     */
    reset() {
        this.nameLabel.string = '';
        this.textRichText.string = '';
        this.nameBg.node.active = false;
        if (this.continueIndicator) {
            this.continueIndicator.active = false;
        }
    }

    /**
     * 转义 XML 特殊字符（用于 RichText）
     */
    private escapeXml(text: string): string {
        return text
            .replace(/&/g, '&amp;')
            .replace(/</g, '&lt;')
            .replace(/>/g, '&gt;')
            .replace(/"/g, '&quot;')
            .replace(/'/g, '&apos;');
    }

    /**
     * 设置打字速度
     */
    setTypingSpeed(speed: number) {
        this.typingSpeed = speed;
    }

    /**
     * 获取当前说话者
     */
    getCurrentSpeaker(): string {
        return this.currentSpeaker;
    }

    /**
     * 获取当前文本
     */
    getCurrentText(): string {
        return this.currentText;
    }
}