{% extends "layout.html" %}

{% block content %}
<div class="container">
    <div class="row justify-content-center">
        <div class="col-md-8">
            <div class="card shadow">
                <div class="card-header bg-dark text-white d-flex justify-content-between align-items-center">
                    <h5 class="mb-0">Application Settings</h5>
                    <span class="badge bg-primary">LLM Configuration</span>
                </div>
                <div class="card-body">
                    <form method="post">
                        <div class="mb-4">
                            <label for="llm_provider" class="form-label fw-bold">LLM Provider</label>
                            <select class="form-select form-select-lg" id="llm_provider" name="llm_provider">
                                <option value="openrouter" {% if settings.llm_provider == 'openrouter' %}selected{% endif %}>OpenRouter (Cloud)</option>
                                <option value="ollama" {% if settings.llm_provider == 'ollama' %}selected{% endif %}>Ollama (Local)</option>
                                <option value="lmstudio" {% if settings.llm_provider == 'lmstudio' %}selected{% endif %}>LMStudio (Local)</option>
                            </select>
                            <div class="form-text">Choose where your AI text generation requests are processed.</div>
                        </div>

                        <hr>

                        <!-- OpenRouter Settings -->
                        <div id="openrouter-settings" class="provider-settings" {% if settings.llm_provider != 'openrouter' %}style="display:none;"{% endif %}>
                            <h5 class="mb-3 text-primary">OpenRouter Configuration</h5>
                            <div class="mb-3">
                                <label for="api_key" class="form-label">API Key</label>
                                <div class="input-group">
                                    <input type="password" class="form-control" id="api_key" name="api_key" value="{{ settings.openrouter_api_key or '' }}">
                                    <button class="btn btn-outline-primary" type="button" id="connect-openrouter-btn">Load Models</button>
                                </div>
                                <div class="form-text">Get your key at <a href="https://openrouter.ai/" target="_blank">openrouter.ai</a></div>
                            </div>

                            <div class="mb-3">
                                <label for="model" class="form-label">Model Selection</label>
                                <select class="form-select" id="model" name="model">
                                    <option value="{{ settings.openrouter_model }}" selected>{{ settings.openrouter_model }}</option>
                                </select>
                            </div>
                        </div>

                        <!-- Local LLM Settings (Ollama/LMStudio) -->
                        <div id="local-settings" class="provider-settings" {% if settings.llm_provider == 'openrouter' %}style="display:none;"{% endif %}>
                            <h5 class="mb-3 text-primary">Local LLM Configuration</h5>
                            <div class="mb-3">
                                <label for="local_base_url" class="form-label">Base URL</label>
                                <div class="input-group">
                                    <input type="text" class="form-control" id="local_base_url" name="local_base_url" 
                                           placeholder="e.g. http://localhost:11434/v1"
                                           value="{{ settings.local_base_url or '' }}">
                                    <button class="btn btn-outline-primary" type="button" id="connect-local-btn">Load Models</button>
                                </div>
                                <div id="url-help" class="form-text">
                                    Ollama default: <code>http://localhost:11434/v1</code><br>
                                    LMStudio default: <code>http://localhost:1234/v1</code>
                                </div>
                            </div>

                            <div class="mb-3">
                                <label for="local_model" class="form-label">Model Selection</label>
                                <select class="form-select" id="local_model" name="local_model">
                                    {% if settings.local_model %}
                                    <option value="{{ settings.local_model }}" selected>{{ settings.local_model }}</option>
                                    {% else %}
                                    <option value="" selected disabled>Select a model...</option>
                                    {% endif %}
                                </select>
                                <div class="form-text">Ensure your local LLM server is running and API is enabled.</div>
                            </div>
                        </div>

                        <div class="d-grid mt-4">
                            <button type="submit" class="btn btn-primary btn-lg">Save All Settings</button>
                        </div>
                    </form>
                </div>
            </div>
        </div>
    </div>
</div>
{% endblock %}

{% block scripts %}
<script>
    document.addEventListener('DOMContentLoaded', () => {
        const providerSelect = document.getElementById('llm_provider');
        const openrouterSettings = document.getElementById('openrouter-settings');
        const localSettings = document.getElementById('local-settings');
        const localBaseUrlInput = document.getElementById('local_base_url');

        // Toggle visibility based on provider
        providerSelect.addEventListener('change', () => {
            if (providerSelect.value === 'openrouter') {
                openrouterSettings.style.display = 'block';
                localSettings.style.display = 'none';
            } else {
                openrouterSettings.style.display = 'none';
                localSettings.style.display = 'block';
                
                // Auto-fill default URLs if empty
                if (!localBaseUrlInput.value) {
                    if (providerSelect.value === 'ollama') {
                        localBaseUrlInput.value = 'http://localhost:11434/v1';
                    } else if (providerSelect.value === 'lmstudio') {
                        localBaseUrlInput.value = 'http://localhost:1234/v1';
                    }
                }
            }
        });

        // OpenRouter Model Loading
        const connectOpenRouterBtn = document.getElementById('connect-openrouter-btn');
        const apiKeyInput = document.getElementById('api_key');
        const modelSelect = document.getElementById('model');
        const currentModel = "{{ settings.openrouter_model }}";

        connectOpenRouterBtn.addEventListener('click', async () => {
            const apiKey = apiKeyInput.value;
            if (!apiKey) { alert('Please enter an API Key first.'); return; }

            connectOpenRouterBtn.disabled = true;
            connectOpenRouterBtn.textContent = 'Loading...';

            try {
                const formData = new FormData();
                formData.append('api_key', apiKey);
                const response = await fetch('/get_openrouter_models', { method: 'POST', body: formData });
                const data = await response.json();

                if (data.error) {
                    alert('Error: ' + data.error);
                } else {
                    modelSelect.innerHTML = '';
                    data.models.sort((a, b) => a.name.localeCompare(b.name)).forEach(model => {
                        const option = document.createElement('option');
                        option.value = model.id;
                        option.textContent = model.name;
                        if (model.id === currentModel) option.selected = true;
                        modelSelect.appendChild(option);
                    });
                    alert('OpenRouter models loaded successfully!');
                }
            } catch (err) {
                alert('Failed to connect to OpenRouter.');
            } finally {
                connectOpenRouterBtn.disabled = false;
                connectOpenRouterBtn.textContent = 'Load Models';
            }
        });

        // Local Model Loading
        const connectLocalBtn = document.getElementById('connect-local-btn');
        const localModelSelect = document.getElementById('local_model');
        const currentLocalModel = "{{ settings.local_model }}";

        connectLocalBtn.addEventListener('click', async () => {
            const baseUrl = localBaseUrlInput.value;
            if (!baseUrl) { alert('Please enter a Base URL first.'); return; }

            connectLocalBtn.disabled = true;
            connectLocalBtn.textContent = 'Loading...';

            try {
                const formData = new FormData();
                formData.append('base_url', baseUrl);
                const response = await fetch('/get_local_models', { method: 'POST', body: formData });
                const data = await response.json();

                if (data.error) {
                    alert('Error: ' + data.error);
                } else {
                    localModelSelect.innerHTML = '';
                    data.models.forEach(model => {
                        const option = document.createElement('option');
                        option.value = model.id;
                        option.textContent = model.name;
                        if (model.id === currentLocalModel) option.selected = true;
                        localModelSelect.appendChild(option);
                    });
                    if (data.models.length === 0) alert('No models found at this URL.');
                    else alert('Local models loaded successfully!');
                }
            } catch (err) {
                alert('Failed to connect to local LLM server. Make sure it is running and CORS is enabled if needed.');
            } finally {
                connectLocalBtn.disabled = false;
                connectLocalBtn.textContent = 'Load Models';
            }
        });
    });
</script>
{% endblock %}