// LLM Prompts Plugin for SnappyMail
// Provides UI and API interaction for AI-driven email writing prompts

(function () {
    'use strict';

    // Initialize plugin when DOM is ready
    document.addEventListener('DOMContentLoaded', function () {
        if (typeof rl !== 'undefined') {
            rl.addSettingsViewModel(
                'LLMPromptsSettings',
                'LLMPromptsSettings',
                'LLM Prompts',
                'Settings for AI-driven email writing prompts powered by Grok 3',
                true
            );

            // Add UI for Smart Prompts in compose window
            rl.addHook('view-model', function (vm) {
                if (vm.viewModelName === 'ComposeViewModel') {
                    initComposeUI(vm);
                }
            });
        }
    });

    function initComposeUI(composeVM) {
        // Add Smart Prompts button or sidebar to compose window
        const toolbar = document.querySelector('.compose-toolbar');
        if (toolbar) {
            const smartPromptsButton = document.createElement('button');
            smartPromptsButton.className = 'button smart-prompts';
            smartPromptsButton.innerHTML = 'Smart Prompts';
            smartPromptsButton.onclick = function () {
                toggleSmartPromptsSidebar(composeVM);
            };
            toolbar.appendChild(smartPromptsButton);
        }
    }

    function toggleSmartPromptsSidebar(composeVM) {
        // Toggle visibility of prompts sidebar
        let sidebar = document.querySelector('.smart-prompts-sidebar');
        if (!sidebar) {
            sidebar = document.createElement('div');
            sidebar.className = 'smart-prompts-sidebar';
            sidebar.innerHTML = getPromptsHTML();
            document.querySelector('.compose-box').appendChild(sidebar);

            // Add event listeners for prompt selection
            setupPrompts(sidebar, composeVM);
        } else {
            sidebar.style.display = sidebar.style.display === 'none' ? 'block' : 'none';
        }
    }

    function getPromptsHTML() {
        // HTML for prompt categories and suggestions
        return `
            <h3>Smart Prompts (Grok 3)</h3>
            <div class="prompt-category">
                <h4>Professional</h4>
                <ul>
                    <li data-prompt="Write a concise follow-up email to a client">Follow-up Email</li>
                    <li data-prompt="Draft a professional proposal email">Proposal Email</li>
                </ul>
            </div>
            <div class="prompt-category">
                <h4>Creative</h4>
                <ul>
                    <li data-prompt="Compose a friendly invitation for a team event">Team Event Invite</li>
                </ul>
            </div>
            <div class="prompt-category">
                <h4>Assistance</h4>
                <ul>
                    <li data-prompt="Rephrase this email to sound more polite">Make Polite</li>
                </ul>
            </div>
            <div class="prompt-category">
                <h4>Quick Replies</h4>
                <ul>
                    <li data-prompt="Generate a thank-you response for a received email">Thank You Reply</li>
                </ul>
            </div>
            <div class="context-input">
                <textarea placeholder="Add context or modify prompt..." rows="3"></textarea>
                <button onclick="generateDraft(this)">Generate Draft</button>
            </div>
        `;
    }

    function setupPrompts(sidebar, composeVM) {
        const prompts = sidebar.querySelectorAll('.prompt-category li');
        prompts.forEach(prompt => {
            prompt.onclick = function () {
                const promptText = this.getAttribute('data-prompt');
                sidebar.querySelector('.context-input textarea').value = promptText;
                // Highlight selected prompt
                prompts.forEach(p => p.classList.remove('selected'));
                this.classList.add('selected');
            };
        });
    }

    function generateDraft(button) {
        const sidebar = button.closest('.smart-prompts-sidebar');
        const prompt = sidebar.querySelector('.context-input textarea').value;
        const subject = document.querySelector('.compose-subject input').value;
        const body = document.querySelector('.compose-body .editor').innerText;

        // Make API call to Grok 3 or configured LLM
        fetchLLMDraft(prompt, subject, body).then(draft => {
            if (draft) {
                // Insert draft into compose body
                const editor = document.querySelector('.compose-body .editor');
                editor.innerHTML = draft.replace(/\n/g, '<br>');
            }
        }).catch(error => {
            console.error('Error generating draft:', error);
            alert('Failed to generate draft. Please check settings.');
        });
    }

    async function fetchLLMDraft(prompt, subject, body) {
        // This would make an API call to the backend which handles Grok 3 API interaction
        // For now, simulate an API call
        const response = await fetch('/?/Api/LLMPrompts/GenerateDraft', {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({
                prompt: prompt,
                subject: subject,
                body: body,
                enableContextAnalysis: rl.settingsGet('LLMPromptsSettings.enable_context_analysis')
            })
        });

        if (!response.ok) {
            throw new Error('Network response was not ok');
        }

        const data = await response.json();
        return data.result;
    }
})();