class VNCPaste {
    constructor(config = {}) {
        this.config = {
            selector: '#noVNC_canvas',
            fallbackSelector: 'canvas',
            baseDelay: 80,
            specialDelay: 160,
            enableLogging: true,
            middleClickEnabled: true,
            ...config
        };
        this.canvas = null;
        this.isInitialized = false;
        const shiftPairs = {
            '~': '`', '!': '1', '@': '2', '#': '3', '$': '4',
            '%': '5', '^': '6', '&': '7', '*': '8', '(': '9',
            ')': '0', '_': '-', '+': '=', '{': '[', '}': ']',
            '|': '\\', ':': ';', '"': "'", '<': ',', '>': '.',
            '?': '/'
        };
        this.specialKeys = new Map(
            Object.entries(shiftPairs).map(([sym, base]) => [sym, { key: base, shiftKey: true }])
        );
    }
    log(...args) { if (this.config.enableLogging) console.log('[VNCPaste]', ...args); }
    error(...args) { console.error('[VNCPaste]', ...args); }
    findCanvas() {
        this.canvas = document.querySelector(this.config.selector) ||
                      document.querySelector(this.config.fallbackSelector);
        if (!this.canvas) throw new Error('Canvas not found');
        return this.canvas;
    }
    createKeyboardEvent(type, key, options = {}) {
        return new KeyboardEvent(type, {
            key,
            keyCode: key.charCodeAt(0),
            charCode: key.charCodeAt(0),
            which: key.charCodeAt(0),
            bubbles: true,
            ...options
        });
    }
    async sendKeyboardEvents(char) {
        const mapping = this.specialKeys.get(char);
        let keyInfo = mapping 
            ? mapping 
            : /[A-Z]/.test(char) ? { key: char, shiftKey: true } : { key: char, shiftKey: false };
        const delay = mapping ? this.config.specialDelay : this.config.baseDelay;
        for (const ev of ['keydown', 'keypress', 'keyup']) {
            await new Promise(res => {
                setTimeout(() => {
                    this.canvas.dispatchEvent(
                        this.createKeyboardEvent(ev, char, { shiftKey: keyInfo.shiftKey })
                    );
                    this.log(`发送 ${ev}: '${char}' (shift=${keyInfo.shiftKey})`);
                    res();
                }, 10);
            });
        }
        await new Promise(res => setTimeout(res, delay));
    }
    async sendString(text) {
        if (!this.canvas) return this.error('Canvas not initialized');
        this.canvas.focus();
        await new Promise(res => setTimeout(res, 200));
        for (let i = 0; i < text.length; i++) {
            try { await this.sendKeyboardEvents(text[i]); }
            catch (e) { this.error(`字符 '${text[i]}' 出错:`, e); }
        }
        this.log("发送完毕");
    }
    async showCustomInputBox() {
        return new Promise(resolve => {
            let overlay = document.createElement('div');
            Object.assign(overlay.style, {
                position: 'fixed', top: 0, left: 0, width: '100%', height: '100%',
                background: 'rgba(0,0,0,0.6)', display: 'flex',
                alignItems: 'center', justifyContent: 'center', zIndex: 9999
            });
            let box = document.createElement('div');
            Object.assign(box.style, {
                background: '#fff', padding: '20px', borderRadius: '8px',
                display: 'flex', flexDirection: 'column', minWidth: '300px'
            });
            let textarea = document.createElement('textarea');
            textarea.rows = 4; textarea.style.width = '100%';
            textarea.placeholder = '粘贴要发送的内容...';
            let btn = document.createElement('button');
            btn.textContent = '发送'; btn.style.marginTop = '10px';
            btn.onclick = () => { document.body.removeChild(overlay); resolve(textarea.value); };
            box.appendChild(textarea); box.appendChild(btn); overlay.appendChild(box);
            document.body.appendChild(overlay); textarea.focus();
        });
    }
    async handleMiddleClick(e) {
        if (e.button === 1 && this.config.middleClickEnabled) {
            e.preventDefault();
            this.canvas.focus();
            let text = await this.showCustomInputBox();
            if (text) await this.sendString(text);
        }
    }
    init() {
        if (this.isInitialized) return this.error('Already initialized');
        this.findCanvas();
        this.canvas.addEventListener('mouseup', this.handleMiddleClick.bind(this));
        this.canvas.addEventListener('contextmenu', e => e.preventDefault());
        window.sendString = this.sendString.bind(this);
        this.isInitialized = true;
        this.log('VNCPaste 中键触发版已初始化');
    }
    destroy() {
        if (!this.isInitialized) return;
        this.canvas.removeEventListener('mouseup', this.handleMiddleClick.bind(this));
        delete window.sendString;
        this.isInitialized = false;
        this.log('销毁完成');
    }
}
const vncPaste = new VNCPaste();
vncPaste.init();