import { NotesApi } from "../api/notesApi.js";

export class AppendMenu {
    constructor(textArea, onContentChange) {
        this.textArea = textArea;
        this.onContentChange = onContentChange;
        this.container = null;
        this.button = null;
        this.submenu = null;
        this.isDisabled = true;
    }

    createMenuElements() {
        // Append submenu container
        this.container = document.createElement('div');
        this.container.className = 'notes-submenu-container';

        this.button = document.createElement('button');
        this.button.innerHTML = '<i class="pi pi-plus-circle"></i>';
        this.button.className = 'notes-btn';
        this.button.title = 'Append';
        this.button.onclick = () => this.toggleMenu();
        this.button.disabled = this.isDisabled;

        // Create submenu
        this.submenu = document.createElement('div');
        this.submenu.className = 'notes-submenu';
        this.submenu.style.display = 'none';

        // Create submenu items
        const rawOption = document.createElement('div');
        rawOption.className = 'notes-submenu-item';
        rawOption.textContent = 'Append list of LoRA filenames';
        rawOption.onclick = () => this.selectOption('raw');

        const tagOption = document.createElement('div');
        tagOption.className = 'notes-submenu-item';
        tagOption.textContent = "Append list of LoRAs in '<lora:name>' format";
        tagOption.onclick = () => this.selectOption('tag');

        const metaOption = document.createElement('div');
        metaOption.className = 'notes-submenu-item';
        metaOption.textContent = "Append list of LoRAs in '<lora:name>, metadata' format";
        metaOption.onclick = () => this.selectOption('meta');

        this.submenu.appendChild(rawOption);
        this.submenu.appendChild(tagOption);
        this.submenu.appendChild(metaOption);

        this.container.appendChild(this.button);
        this.container.appendChild(this.submenu);

        return this.container;
    }

    setDisabled(disabled) {
        this.isDisabled = disabled;
        if (this.button) {
            this.button.disabled = disabled;
        }
    }

    toggleMenu() {
        if (this.submenu.style.display === 'none') {
            this.submenu.style.display = 'block';
            // Add click listener to close menu when clicking outside
            document.addEventListener('click', this.closeMenuHandler);
        } else {
            this.submenu.style.display = 'none';
            document.removeEventListener('click', this.closeMenuHandler);
        }
    }

    closeMenuHandler = (event) => {
        if (!this.container.contains(event.target)) {
            this.submenu.style.display = 'none';
            document.removeEventListener('click', this.closeMenuHandler);
        }
    }

    selectOption(type) {
        this.submenu.style.display = 'none';
        document.removeEventListener('click', this.closeMenuHandler);

        this.appendLoras(type);
    }

    async appendLoras(formatType) {
        try {
            let formattedText;

            switch(formatType) {
                case 'raw':
                    formattedText = await this.formatLorasRaw();
                    break;
                case 'tag':
                    formattedText = await this.formatLorasTags();
                    break;
                case 'meta':
                    formattedText = await this.formatLorasWithMetadata();
                    break;
                default:
                    throw new Error(`Unknown format type: ${formatType}`);
            }

            this.insertTextIntoTextarea(formattedText);
        } catch (error) {
            console.error('Error appending LoRAs:', error);
            alert(`Failed to append LoRAs ${formatType === 'raw' ? 'list' : formatType === 'tag' ? 'tags' : 'with metadata'}`);
        }
    }

    async formatLorasRaw() {
        const loras = await NotesApi.getLoras();

        // Normalize backslashes to forward slashes
        const normalizedLoras = loras.map(lora => lora.replace(/\\/g, '/'));
        return normalizedLoras.join('\n');
    }

    async formatLorasTags() {
        const loras = await NotesApi.getLoras();

        // Format each LoRA as <lora:name>, stripping .safetensors extension and normalizing slashes
        const lorasTags = loras.map(lora => {
            const nameWithoutExt = lora.replace(/\.safetensors$/i, '');
            const normalizedPath = nameWithoutExt.replace(/\\/g, '/');
            return `<lora:${normalizedPath}>`;
        });
        return lorasTags.join('\n');
    }

    async formatLorasWithMetadata() {
        const loras = await NotesApi.getLorasWithMetadata();

        // Format each LoRA with metadata as <lora:name>, metadata
        const lorasWithMeta = loras.map(lora => {
            const nameWithoutExt = lora.name.replace(/\.safetensors$/i, '');
            const normalizedPath = nameWithoutExt.replace(/\\/g, '/');
            const baseTag = `<lora:${normalizedPath}>`;

            if (lora.metadata) {
                return `${baseTag}, ${lora.metadata}`;
            } else {
                return baseTag;
            }
        });
        return lorasWithMeta.join('\n');
    }

    insertTextIntoTextarea(text) {
        if (!this.textArea) return;

        // Add newline before appending if current content doesn't end with one
        const separator = this.textArea.value && !this.textArea.value.endsWith('\n') ? '\n' : '';
        const textToInsert = separator + text;

        // Focus textarea to ensure it's active
        this.textArea.focus();

        // Move cursor to end
        this.textArea.setSelectionRange(this.textArea.value.length, this.textArea.value.length);

        // Use document.execCommand to preserve undo history
        document.execCommand('insertText', false, textToInsert);

        // Trigger change handling
        if (this.onContentChange) {
            this.onContentChange();
        }
    }
}