import { app } from "/scripts/app.js";
import { NotesStore } from "./stores/NotesStore.js";
import { AppendMenu } from "./components/AppendMenu.js";
import { NotesApi } from "./api/notesApi.js";
import { isValidFilename } from "./utils/validation.js";

// Load CSS
const link = document.createElement('link');
link.rel = 'stylesheet';
link.href = '/extensions/comfyui-notes-sidebar/notes-sidebar.css';
document.head.appendChild(link);

class NotesSidebar {
    constructor() {
        this.store = new NotesStore();
        this.tabsContainer = null;
        this.contentArea = null;
        this.textArea = null;
        this.saveBtn = null;
        this.renameBtn = null;
        this.deleteBtn = null;
        this.appendMenu = null;
        this.searchInput = null;
        this.searchResults = null;
        this.isInitialized = false;
        this.sidebarElement = null;
        this.currentFontSize = app.extensionManager.setting.get('Notes Sidebar.Font Size') || 14;
        this.leftButtonContainer = null;

        // Listen to state changes
        this.store.addEventListener('stateChanged', (event) => {
            this.onStateChanged(event.detail);
        });
    }

    onStateChanged(changeDetails) {
        const { prevState, newState, updates } = changeDetails;

        // Update tabs if notes changed, active note changed, or unsaved changes changed
        if (updates.notes || updates.activeNote || updates.unsavedChanges) {
            this.renderTabs();
        }

        // Update textarea if active note changed or note content changed
        if (updates.activeNote || updates.noteContent) {
            this.updateTextArea();
            this.updateTextAreaState();
        }

        // Update button states if active note or unsaved changes changed
        if (updates.activeNote || updates.unsavedChanges) {
            this.updateButtonState();
        }

        // Update search results if active note changed and search is active
        if (updates.activeNote && this.searchInput && this.searchInput.value.trim()) {
            this.onSearchChange();
        }
    }

    get notes() { return this.store.state.notes; }
    get activeNote() { return this.store.state.activeNote; }
    get unsavedChanges() { return this.store.state.unsavedChanges; }
    get noteContent() { return this.store.state.noteContent; }
    get savedContent() { return this.store.state.savedContent; }

    updateTextArea() {
        if (!this.textArea) return;

        if (!this.activeNote) {
            this.textArea.value = '';
            return;
        }

        // Check if we have unsaved content for this note
        if (this.noteContent.has(this.activeNote)) {
            this.textArea.value = this.noteContent.get(this.activeNote);
        } else {
            this.textArea.value = '';
        }
    }

    updateTextAreaState() {
        if (!this.textArea) return;

        const hasActiveNote = !!this.activeNote;
        this.textArea.disabled = !hasActiveNote;
        this.textArea.placeholder = hasActiveNote
            ? 'Start typing your notes...'
            : 'Select a note to start editing...';
    }

    updateButtonState() {
        if (!this.saveBtn || !this.renameBtn || !this.deleteBtn || !this.appendMenu) return;

        const hasActiveNote = !!this.activeNote;
        const hasUnsavedChanges = hasActiveNote && this.unsavedChanges.get(this.activeNote);

        // Save button: enabled only when there's an active note AND unsaved changes
        this.saveBtn.disabled = !hasActiveNote || !hasUnsavedChanges;

        // Rename, delete, and append buttons: enabled only when there's an active note
        this.renameBtn.disabled = !hasActiveNote;
        this.deleteBtn.disabled = !hasActiveNote;
        this.appendMenu.setDisabled(!hasActiveNote);
    }

    async init() {
        await this.loadNotes();
    }

    async createSidebarContent(el) {
        // Ensure the parent element has proper height
        el.style.height = '100%';
        el.style.display = 'flex';
        el.style.flexDirection = 'column';

        // If already initialized, just update the existing content
        if (this.isInitialized && this.sidebarElement) {
            el.innerHTML = '';
            el.appendChild(this.sidebarElement);
            // Trigger reactive updates when reopening
            this.renderTabs();
            this.updateTextArea();
            this.updateTextAreaState();
            return;
        }

        // Create new sidebar content
        this.sidebarElement = document.createElement('div');
        this.sidebarElement.className = 'notes-sidebar';

        this.createTabsContainer(this.sidebarElement);
        this.createMenuContainer(this.sidebarElement);
        this.createSearchContainer(this.sidebarElement);
        this.createContentArea(this.sidebarElement);

        el.appendChild(this.sidebarElement);
        this.isInitialized = true;

        // Load notes after creating UI
        await this.loadNotes();

        // Ensure UI reflects the current state after initialization
        this.renderTabs();
        this.updateTextArea();
        this.updateTextAreaState();
        this.updateButtonState();
    }

    createTabsContainer(parent) {
        const tabsWrapper = document.createElement('div');
        tabsWrapper.className = 'notes-tabs-wrapper';

        // Left side: tabs container for + button and note tabs
        this.tabsContainer = document.createElement('div');
        this.tabsContainer.className = 'notes-tabs-container';

        const newNoteButtonGroup = document.createElement('div');
        newNoteButtonGroup.className = 'notes-button-group';

        const newTabBtn = document.createElement('button');
        newTabBtn.innerHTML = '<i class="pi pi-plus"></i>';
        newTabBtn.title = 'New Note';
        newTabBtn.className = 'notes-new-tab-btn';
        newTabBtn.onclick = () => this.createNewNote();

        newNoteButtonGroup.appendChild(newTabBtn);
        this.tabsContainer.appendChild(newNoteButtonGroup);

        const rightControls = document.createElement('div');
        rightControls.style.display = 'flex';
        rightControls.style.gap = '10px';

        const zoomButtonGroup = document.createElement('div');
        zoomButtonGroup.className = 'notes-button-group';

        const zoomOutBtn = document.createElement('button');
        zoomOutBtn.innerHTML = '<i class="pi pi-search-minus"></i>';
        zoomOutBtn.className = 'notes-btn';
        zoomOutBtn.title = 'Zoom Out';
        zoomOutBtn.onclick = () => this.zoomOut();

        const zoomInBtn = document.createElement('button');
        zoomInBtn.innerHTML = '<i class="pi pi-search-plus"></i>';
        zoomInBtn.className = 'notes-btn';
        zoomInBtn.title = 'Zoom In';
        zoomInBtn.onclick = () => this.zoomIn();

        zoomButtonGroup.appendChild(zoomOutBtn);
        zoomButtonGroup.appendChild(zoomInBtn);

        const refreshButtonGroup = document.createElement('div');
        refreshButtonGroup.className = 'notes-button-group';

        const refreshBtn = document.createElement('button');
        refreshBtn.innerHTML = '<i class="pi pi-refresh"></i>';
        refreshBtn.className = 'notes-btn refresh';
        refreshBtn.title = 'Refresh';
        refreshBtn.onclick = () => this.refreshNotes();

        refreshButtonGroup.appendChild(refreshBtn);

        rightControls.appendChild(zoomButtonGroup);
        rightControls.appendChild(refreshButtonGroup);

        tabsWrapper.appendChild(this.tabsContainer);
        tabsWrapper.appendChild(rightControls);
        parent.appendChild(tabsWrapper);
    }

    createMenuContainer(parent) {
        const buttonContainer = document.createElement('div');
        buttonContainer.className = 'notes-button-container';

        this.leftButtonContainer = document.createElement('div');
        this.leftButtonContainer.className = 'notes-button-group';

        const rightButtonContainer = document.createElement('div');
        rightButtonContainer.className = 'notes-button-group';

        this.saveBtn = document.createElement('button');
        this.saveBtn.innerHTML = '<i class="pi pi-save"></i>';
        this.saveBtn.className = 'notes-btn save';
        this.saveBtn.title = 'Save';
        this.saveBtn.onclick = () => this.saveActiveNote();
        this.saveBtn.disabled = true;

        this.renameBtn = document.createElement('button');
        this.renameBtn.innerHTML = '<i class="pi pi-file-edit"></i>';
        this.renameBtn.className = 'notes-btn rename';
        this.renameBtn.title = 'Rename';
        this.renameBtn.onclick = () => this.renameActiveNote();
        this.renameBtn.disabled = true;

        this.deleteBtn = document.createElement('button');
        this.deleteBtn.innerHTML = '<i class="pi pi-trash"></i>';
        this.deleteBtn.className = 'notes-btn delete';
        this.deleteBtn.title = 'Delete';
        this.deleteBtn.onclick = () => this.deleteActiveNote();
        this.deleteBtn.disabled = true;

        this.leftButtonContainer.appendChild(this.saveBtn);
        this.leftButtonContainer.appendChild(this.renameBtn);
        // Append menu will be added later after textarea is created
        rightButtonContainer.appendChild(this.deleteBtn);

        buttonContainer.appendChild(this.leftButtonContainer);
        buttonContainer.appendChild(rightButtonContainer);

        parent.appendChild(buttonContainer);
    }

    createSearchContainer(parent) {
        const searchContainer = document.createElement('div');
        searchContainer.className = 'notes-search-container';

        const inputWrapper = document.createElement('div');
        inputWrapper.className = 'notes-search-input-wrapper';

        this.searchInput = document.createElement('input');
        this.searchInput.type = 'text';
        this.searchInput.className = 'notes-search-input';
        this.searchInput.placeholder = 'Search lines...';
        this.searchInput.addEventListener('input', () => this.onSearchChange());

        const clearButton = document.createElement('button');
        clearButton.className = 'notes-search-clear';
        clearButton.innerHTML = '<i class="pi pi-times-circle"></i>';
        clearButton.title = 'Clear search';
        clearButton.addEventListener('click', () => this.clearSearch());

        this.searchResults = document.createElement('div');
        this.searchResults.className = 'notes-search-results';
        this.searchResults.style.display = 'none';

        inputWrapper.appendChild(this.searchInput);
        inputWrapper.appendChild(clearButton);
        searchContainer.appendChild(inputWrapper);
        searchContainer.appendChild(this.searchResults);
        parent.appendChild(searchContainer);
    }

    createContentArea(parent) {
        this.contentArea = document.createElement('div');
        this.contentArea.className = 'notes-content-area';

        this.textArea = document.createElement('textarea');
        this.textArea.className = 'notes-textarea';
        this.textArea.placeholder = 'Select a note to start editing...';

        // Apply saved font size
        this.updateFontSize();

        // Initialize as disabled (will be enabled reactively if there's an active note)
        this.textArea.disabled = true;

        // Add event listener to track changes
        this.textArea.addEventListener('input', () => this.onTextAreaChange());

        // Add keydown event listener for Ctrl+S shortcut
        this.textArea.addEventListener('keydown', (e) => this.onTextAreaKeyDown(e));

        // Initialize AppendMenu with textarea reference and change handler
        this.appendMenu = new AppendMenu(this.textArea, () => this.onTextAreaChange());

        // Add append menu to the left button container
        if (this.leftButtonContainer) {
            this.leftButtonContainer.appendChild(this.appendMenu.createMenuElements());
        }

        this.contentArea.appendChild(this.textArea);
        parent.appendChild(this.contentArea);
    }

    async loadNotes() {
        try {
            const notes = await NotesApi.getNotesList();

            this.store.setNotes(notes);

            if (notes.length > 0 && !this.activeNote) {
                this.store.setActiveNote(notes[0]);
            } else if (notes.length === 0) {
                // Ensure active note is cleared when no notes exist
                this.store.setActiveNote(null);
            }

            // Load content for active note after setting state
            if (this.activeNote) {
                await this.loadNoteContent(this.activeNote);
            }
        } catch (error) {
            console.error('Error loading notes:', error);
        }
    }

    renderTabs() {
        if (!this.tabsContainer) return;

        const existingTabs = this.tabsContainer.querySelectorAll('.note-tab');
        existingTabs.forEach(tab => tab.remove());

        this.notes.forEach(noteName => {
            const tab = document.createElement('button');
            const isUnsaved = this.unsavedChanges.get(noteName) || false;
            tab.textContent = (isUnsaved ? '* ' : '') + noteName;
            tab.className = `note-tab ${this.activeNote === noteName ? 'active' : ''}`;
            tab.title = noteName + (isUnsaved ? ' (unsaved)' : ''); // Full name in tooltip
            tab.onclick = () => this.selectNote(noteName);

            this.tabsContainer.appendChild(tab);
        });
    }

    async selectNote(noteName) {
        // Save current content before switching
        if (this.activeNote) {
            this.store.setNoteContent(this.activeNote, this.textArea.value);
        }

        this.store.setActiveNote(noteName);
        await this.loadNoteContent(noteName);
    }

    async loadNoteContent(noteName) {
        try {
            // Check if we have unsaved content for this note
            if (this.noteContent.has(noteName)) {
                // Content is already in state, updateTextArea will handle it
                return;
            } else {
                // Load from server
                const content = await NotesApi.getNoteContent(noteName);

                // Store both current and saved content
                this.store.setNoteContent(noteName, content);
                this.store.setSavedContent(noteName, content);
            }
        } catch (error) {
            console.error('Error loading note content:', error);
        }
    }

    async saveActiveNote() {
        try {
            const content = this.textArea.value;
            await NotesApi.saveNote(this.activeNote, content);

            console.log('Note saved successfully');
            // Mark as saved
            this.store.setSavedContent(this.activeNote, content);
            this.store.setNoteContent(this.activeNote, content);
            this.store.setUnsavedChanges(this.activeNote, false);
        } catch (error) {
            console.error('Error saving note:', error);
        }
    }

    async deleteActiveNote() {
        if (!confirm(`Are you sure you want to delete "${this.activeNote}"?`)) return;

        try {
            await NotesApi.deleteNote(this.activeNote);

            // Clean up tracking for deleted note
            const deletedNote = this.activeNote;

            // Clear active note first to ensure state change is triggered
            this.store.setActiveNote(null);
            this.store.deleteNoteFromState(deletedNote);

            // Refresh notes list (this will handle setting activeNote correctly)
            await this.refreshNotes();
        } catch (error) {
            console.error('Error deleting note:', error);
        }
    }

    async renameActiveNote() {
        let newName = prompt('Enter new note name:', this.activeNote);
        if (!newName) return;

        // Trim spaces
        newName = newName.trim();
        if (!newName || newName === this.activeNote) return;

        try {
            if (!isValidFilename(newName)) {
                alert('Invalid filename! Please avoid special characters like / \\ : * ? " < > |');
                return;
            }

            // Check if new name already exists
            if (this.notes.includes(newName)) {
                alert('A note with this name already exists!');
                return;
            }

            // Get current content
            const currentContent = this.textArea.value;

            // Create new note with the content
            await NotesApi.saveNote(newName, currentContent);

            // Delete old note
            await NotesApi.deleteNote(this.activeNote);

            // Update tracking maps through store
            const oldName = this.activeNote;
            this.store.renameNoteInState(oldName, newName);

            // Set saved content to what we just saved
            this.store.setSavedContent(newName, currentContent);
            this.store.setUnsavedChanges(newName, false);

            // Update active note and refresh
            this.store.setActiveNote(newName);
            await this.refreshNotes();
        } catch (error) {
            console.error('Error renaming note:', error);
        }
    }

    async createNewNote() {
        let noteName;

        // Keep asking for a name until user cancels or enters a valid unique name
        while (true) {
            noteName = prompt('Enter note name:');
            if (!noteName) return; // User cancelled

            // Trim spaces
            noteName = noteName.trim();

            // Validate filename safety
            if (!isValidFilename(noteName)) {
                alert('Invalid filename! Please avoid special characters like / \\ : * ? " < > |');
                continue; // Ask again
            }

            // Check if note name already exists
            if (this.notes.includes(noteName)) {
                alert('A note with this name already exists!');
                continue; // Ask again
            }

            break; // Valid unique name
        }

        try {
            await NotesApi.saveNote(noteName, '');

            await this.refreshNotes();
            this.store.setActiveNote(noteName);

            // Initialize tracking for new note
            this.store.setNoteContent(noteName, '');
            this.store.setSavedContent(noteName, '');
            this.store.setUnsavedChanges(noteName, false);
        } catch (error) {
            console.error('Error creating note:', error);
        }
    }

    async refreshNotes() {
        // Preserve current content before refreshing
        if (this.activeNote && this.textArea) {
            this.store.setNoteContent(this.activeNote, this.textArea.value);
        }

        await this.loadNotes();
    }

    onTextAreaChange() {
        const currentContent = this.textArea.value;
        const savedContent = this.savedContent.get(this.activeNote) || '';

        // Update current content
        this.store.setNoteContent(this.activeNote, currentContent);

        // Check if content has changed from saved version
        const hasUnsavedChanges = currentContent !== savedContent;
        this.store.setUnsavedChanges(this.activeNote, hasUnsavedChanges);

        // Update search results if search is active
        if (this.searchInput && this.searchInput.value.trim()) {
            this.onSearchChange();
        }
    }

    onTextAreaKeyDown(event) {
        // Handle Ctrl+S shortcut for saving notes
        if (event.ctrlKey && event.key === 's') {
            const saveShortcutSetting = app.extensionManager.setting.get('Notes Sidebar.Save Shortcut') || 'note_only';

            if (saveShortcutSetting === 'none') {
                // No shortcut behavior - let ComfyUI handle it normally
                return;
            }

            if (saveShortcutSetting === 'note_only') {
                // Prevent ComfyUI from seeing the event
                event.preventDefault();
                event.stopPropagation();
            } else if (saveShortcutSetting === 'both') {
                // Only prevent browser default, let ComfyUI handle it too
                event.preventDefault();
            }

            // Save note if there's an active note and unsaved changes
            if (this.activeNote && this.unsavedChanges.get(this.activeNote)) {
                this.saveActiveNote();
            }
        }
    }

    onSearchChange() {
        const searchText = this.searchInput.value.trim();

        if (!searchText) {
            // Hide search results when search is empty
            this.searchResults.style.display = 'none';
            return;
        }

        if (!this.activeNote || !this.textArea.value) {
            // No active note or content to search
            this.searchResults.style.display = 'none';
            return;
        }

        const content = this.textArea.value;
        const lines = content.split('\n');
        const matchingLines = [];

        lines.forEach((line, index) => {
            if (line.toLowerCase().includes(searchText.toLowerCase())) {
                matchingLines.push({
                    lineNumber: index + 1,
                    content: line
                });
            }
        });

        if (matchingLines.length === 0) {
            this.searchResults.innerHTML = '<div class="notes-search-no-results">No matching lines found</div>';
        } else {
            this.searchResults.innerHTML = matchingLines.map(line =>
                `<div class="notes-search-result" onclick="this.parentNode.parentNode.parentNode.querySelector('.notes-textarea').focus(); this.parentNode.parentNode.parentNode.querySelector('.notes-textarea').setSelectionRange(${this.getLineStartPosition(content, line.lineNumber - 1)}, ${this.getLineEndPosition(content, line.lineNumber - 1)});">
                    <span class="notes-search-line-number">${line.lineNumber}:</span>
                    <span class="notes-search-line-content">${this.highlightMatch(this.escapeHtml(line.content), searchText)}</span>
                </div>`
            ).join('');
        }

        this.searchResults.style.display = 'block';
    }

    clearSearch() {
        this.searchInput.value = '';
        this.searchResults.style.display = 'none';
        this.searchInput.focus();
    }

    getLineStartPosition(content, lineIndex) {
        const lines = content.split('\n');
        let position = 0;
        for (let i = 0; i < lineIndex; i++) {
            position += lines[i].length + 1; // +1 for newline character
        }
        return position;
    }

    getLineEndPosition(content, lineIndex) {
        const lines = content.split('\n');
        let position = 0;
        for (let i = 0; i <= lineIndex; i++) {
            position += lines[i].length;
            if (i < lineIndex) position += 1; // +1 for newline character
        }
        return position;
    }

    escapeHtml(text) {
        const div = document.createElement('div');
        div.textContent = text;
        return div.innerHTML;
    }

    highlightMatch(text, filterText) {
        const escapedFilter = filterText.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
        const regex = new RegExp(escapedFilter, 'gi');
        return text.replace(regex, function(match) {
            return `<mark>${match}</mark>`;
        });
    }

    zoomIn() {
        if (this.currentFontSize < 24) { // Max font size
            this.currentFontSize += 1;
            this.updateFontSize();
        }
    }

    zoomOut() {
        if (this.currentFontSize > 8) { // Min font size
            this.currentFontSize -= 1;
            this.updateFontSize();
        }
    }

    updateFontSize() {
        if (this.textArea) {
            this.textArea.style.fontSize = `${this.currentFontSize}px`;
        }
        // Save to settings
        app.extensionManager.setting.set('Notes Sidebar.Font Size', this.currentFontSize);
    }

}


const notesSidebar = new NotesSidebar();

app.registerExtension({
    name: "comfyui.notes.sidebar",
    settings: [
        {
            id: "Notes Sidebar.Save Shortcut",
            name: "Notes Save Shortcut",
            type: "combo",
            options: [
                { value: "none", text: "None (click save button)" },
                { value: "note_only", text: "Ctrl+S (note only, when focused)" },
                { value: "both", text: "Ctrl+S (note + workflow)" }
            ],
            defaultValue: "note_only"
        },
        {
            id: "Notes Sidebar.Font Size",
            name: "Notes Font Size",
            type: "slider",
            attrs: {
                min: 8,
                max: 24,
                step: 1
            },
            defaultValue: 14
        }
    ],
    async setup() {
        await notesSidebar.init();

        app.extensionManager.registerSidebarTab({
            id: "notes",
            icon: "pi pi-pen-to-square",
            title: "Notes",
            tooltip: "Notes",
            type: "custom",
            render: (el) => {
                notesSidebar.createSidebarContent(el);
            },
        });
    }
});