{% extends "base.html" %}

{% block title %}Server Settings - Email Server{% endblock %}

{% block extra_css %}
<style>
    .setting-section {
        border-left: 4px solid var(--bs-primary);
        padding-left: 1rem;
        margin-bottom: 2rem;
    }
    .setting-description {
        font-size: 0.875rem;
        color: var(--bs-secondary);
        margin-bottom: 0.5rem;
    }
    .card-header {
        cursor: pointer;
    }
    .card-header .bi-chevron-down {
        transition: transform 0.2s;
    }
    .card-header.collapsed .bi-chevron-down {
        transform: rotate(-90deg);
    }
</style>
{% endblock %}

{% block content %}
<div class="container-fluid">
    <div class="d-flex justify-content-between align-items-center mb-4">
        <h2>
            <i class="bi bi-sliders me-2"></i>
            Server Settings
        </h2>
        <div class="btn-group">
            <button type="button" class="btn btn-outline-danger me-2" onclick="restartSmtpServer()" id="restart-smtp-btn">
                <i class="bi bi-arrow-repeat me-2"></i>
                Restart SMTP Server
            </button>
            <button type="button" class="btn btn-outline-warning" onclick="resetToDefaults()">
                <i class="bi bi-arrow-clockwise me-2"></i>
                Reset to Defaults
            </button>
            <button type="button" class="btn btn-outline-info" onclick="exportSettings()">
                <i class="bi bi-download me-2"></i>
                Export Config
            </button>
        </div>
    </div>

    <form method="POST" action="{{ url_for('email.settings_update') }}" id="settingsForm">
        <!-- Add CSRF token if enabled -->
        {% if csrf_token %}
        <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
        {% endif %}
        <!-- Server Settings -->
        <div class="card mb-4">
            <div class="card-header" data-bs-toggle="collapse" data-bs-target="#serverSettings" aria-expanded="true">
                <h5 class="mb-0 d-flex justify-content-between align-items-center">
                    <span><i class="bi bi-server me-2"></i>Server Configuration</span>
                    <i class="bi bi-chevron-down"></i>
                </h5>
            </div>
            <div id="serverSettings" class="collapse show">
                <div class="card-body">
                    <div class="setting-section">
                        <div class="row">
                            <div class="col-md-6">
                                <div class="mb-3">
                                    <label class="form-label">SMTP Port</label>
                                    <div class="setting-description">Port for SMTP unencrypted connections (standard: 25)</div>
                                    <input type="number" 
                                           class="form-control" 
                                           name="Server.smtp_port" 
                                           value="{{ settings['Server']['smtp_port'] }}"
                                           min="1" max="65535">
                                </div>
                            </div>
                            <div class="col-md-6">
                                <div class="mb-3">
                                    <label class="form-label">SMTP STARTTLS Port</label>
                                    <div class="setting-description">Port for SMTP STARTTLS connections (standard: 587)</div>
                                    <input type="number" 
                                           class="form-control" 
                                           name="Server.smtp_tls_port" 
                                           value="{{ settings['Server']['smtp_tls_port'] }}"
                                           min="1" max="65535">
                                </div>
                            </div>
                        </div>
                        <div class="row">
                            <div class="col-md-6">
                                <div class="mb-3">
                                    <label class="form-label">Bind IP Address</label>
                                    <div class="setting-description">IP address to bind SMTP server only to (0.0.0.0 for all interfaces)</div>
                                    <input type="text" 
                                           class="form-control" 
                                           name="Server.bind_ip" 
                                           value="{{ settings['Server']['bind_ip'] }}"
                                           pattern="^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$">
                                </div>
                            </div>
                            <div class="col-md-6">
                                <div class="mb-3">
                                    <label class="form-label">Hostname</label>
                                    <div class="setting-description">Server hostname for HELO/EHLO commands</div>
                                    <input type="text" 
                                           class="form-control" 
                                           name="Server.hostname" 
                                           value="{{ settings['Server']['hostname'] }}">
                                </div>
                            </div>
                        </div>
                        <div class="row">
                            <div class="col-md-6">
                                <div class="mb-3">
                                    <label class="form-label">HELO Hostname</label>
                                    <div class="setting-description">Override HELO hostname for SMTP identification</div>
                                    <input type="text" 
                                           class="form-control" 
                                           name="Server.helo_hostname" 
                                           value="{{ settings['Server']['helo_hostname'] }}">
                                </div>
                            </div>
                            <div class="col-md-6">
                                <div class="mb-3">
                                    <label class="form-label">Server Banner</label>
                                    <div class="setting-description">Custom SMTP server banner (empty by default - hides SMTP version)</div>
                                    <input type="text" 
                                           class="form-control" 
                                           name="Server.server_banner" 
                                           value="{{ settings['Server']['server_banner'] }}">
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>

        <!-- Database Settings -->
        <div class="card mb-4">
            <div class="card-header collapsed" data-bs-toggle="collapse" data-bs-target="#databaseSettings" aria-expanded="false">
                <h5 class="mb-0 d-flex justify-content-between align-items-center">
                    <span><i class="bi bi-database me-2"></i>Database Configuration</span>
                    <i class="bi bi-chevron-down"></i>
                </h5>
            </div>
            <div id="databaseSettings" class="collapse">
                <div class="card-body">
                    <div class="setting-section">
                        <div class="mb-3">
                            <label class="form-label">Database URL</label>
                            <div class="setting-description">Database connection string</div>
                            <div class="input-group mb-2">
                                <input type="text" 
                                       class="form-control font-monospace" 
                                       name="Database.database_url" 
                                       id="databaseUrl"
                                       value="{{ settings['Database']['database_url'] }}">
                                <button class="btn btn-primary" type="button" onclick="testDatabaseConnection()">
                                    <i class="bi bi-check-circle me-1"></i>
                                    Test Connection
                                </button>
                            </div>
                            <div class="mt-3">
                                <label class="form-label">Example Connection Strings:</label>
                                <div class="list-group">
                                    <button type="button" class="list-group-item list-group-item-action" onclick="setDatabaseExample('sqlite')">
                                        <strong>SQLite:</strong> sqlite:///email_server/server_data/smtp_server.db
                                    </button>
                                    <button type="button" class="list-group-item list-group-item-action" onclick="setDatabaseExample('mysql')">
                                        <strong>MySQL:</strong> mysql://user:password@localhost:3306/dbname
                                    </button>
                                    <button type="button" class="list-group-item list-group-item-action" onclick="setDatabaseExample('postgresql')">
                                        <strong>PostgreSQL:</strong> postgresql://user:password@localhost:5432/dbname
                                    </button>
                                    <button type="button" class="list-group-item list-group-item-action" onclick="setDatabaseExample('mssql')">
                                        <strong>MSSQL:</strong> mssql+pyodbc://user:password@server:1433/dbname?driver=ODBC+Driver+17+for+SQL+Server
                                    </button>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>

        <!-- Logging Settings -->
        <div class="card mb-4">
            <div class="card-header collapsed" data-bs-toggle="collapse" data-bs-target="#loggingSettings" aria-expanded="false">
                <h5 class="mb-0 d-flex justify-content-between align-items-center">
                    <span><i class="bi bi-journal-text me-2"></i>Logging Configuration</span>
                    <i class="bi bi-chevron-down"></i>
                </h5>
            </div>
            <div id="loggingSettings" class="collapse">
                <div class="card-body">
                    <div class="setting-section">
                        <div class="row">
                            <div class="col-md-6">
                                <div class="mb-3">
                                    <label class="form-label">Log Level</label>
                                    <div class="setting-description">Minimum log level to record</div>
                                    <select class="form-select" name="Logging.log_level">
                                        <option value="DEBUG" {{ 'selected' if settings['Logging']['log_level'] == 'DEBUG' else '' }}>DEBUG</option>
                                        <option value="INFO" {{ 'selected' if settings['Logging']['log_level'] == 'INFO' else '' }}>INFO</option>
                                        <option value="WARNING" {{ 'selected' if settings['Logging']['log_level'] == 'WARNING' else '' }}>WARNING</option>
                                        <option value="ERROR" {{ 'selected' if settings['Logging']['log_level'] == 'ERROR' else '' }}>ERROR</option>
                                        <option value="CRITICAL" {{ 'selected' if settings['Logging']['log_level'] == 'CRITICAL' else '' }}>CRITICAL</option>
                                    </select>
                                </div>
                            </div>
                            <div class="col-md-6">
                                <div class="mb-3">
                                    <label class="form-label">Hide aiosmtpd INFO Messages</label>
                                    <div class="setting-description">Reduce verbose logging from aiosmtpd library</div>
                                    <select class="form-select" name="Logging.hide_info_aiosmtpd">
                                        <option value="true" {{ 'selected' if settings['Logging']['hide_info_aiosmtpd'] == 'true' else '' }}>Yes</option>
                                        <option value="false" {{ 'selected' if settings['Logging']['hide_info_aiosmtpd'] == 'false' else '' }}>No</option>
                                    </select>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>

        <!-- Relay Settings -->
        <div class="card mb-4">
            <div class="card-header collapsed" data-bs-toggle="collapse" data-bs-target="#relaySettings" aria-expanded="false">
                <h5 class="mb-0 d-flex justify-content-between align-items-center">
                    <span><i class="bi bi-arrow-repeat me-2"></i>Email Relay Configuration</span>
                    <i class="bi bi-chevron-down"></i>
                </h5>
            </div>
            <div id="relaySettings" class="collapse">
                <div class="card-body">
                    <div class="setting-section">
                        <div class="mb-3">
                            <label class="form-label">Relay Timeout (seconds)</label>
                            <div class="setting-description">Timeout for external SMTP connections when relaying emails</div>
                            <input type="number" 
                                   class="form-control" 
                                   name="Relay.relay_timeout" 
                                   value="{{ settings['Relay']['relay_timeout'] }}"
                                   min="5" max="300">
                        </div>
                    </div>
                </div>
            </div>
        </div>

        <!-- TLS Settings -->
        <div class="card mb-4">
            <div class="card-header collapsed" data-bs-toggle="collapse" data-bs-target="#tlsSettings" aria-expanded="false">
                <h5 class="mb-0 d-flex justify-content-between align-items-center">
                    <span><i class="bi bi-shield-lock me-2"></i>TLS/SSL Configuration</span>
                    <i class="bi bi-chevron-down"></i>
                </h5>
            </div>
            <div id="tlsSettings" class="collapse">
                <div class="card-body">
                    <div class="setting-section">
                        <div class="row">
                            <div class="col-md-6">
                                <div class="mb-3">
                                    <label class="form-label">TLS Certificate File</label>
                                    <div class="setting-description">Path to SSL certificate file (.crt or .pem)</div>
                                    <div class="input-group">
                                        <input type="text" 
                                               class="form-control font-monospace" 
                                               name="TLS.tls_cert_file" 
                                               value="{{ settings['TLS']['tls_cert_file'] }}">
                                        <input type="file" 
                                               class="d-none" 
                                               id="certFileUpload" 
                                               accept=".crt,.pem">
                                        <button class="btn btn-outline-secondary" 
                                                type="button"
                                                onclick="document.getElementById('certFileUpload').click()">
                                            <i class="bi bi-upload"></i>
                                        </button>
                                    </div>
                                </div>
                            </div>
                            <div class="col-md-6">
                                <div class="mb-3">
                                    <label class="form-label">TLS Private Key File</label>
                                    <div class="setting-description">Path to SSL private key file (.key or .pem)</div>
                                    <div class="input-group">
                                        <input type="text" 
                                               class="form-control font-monospace" 
                                               name="TLS.tls_key_file" 
                                               value="{{ settings['TLS']['tls_key_file'] }}">
                                        <input type="file" 
                                               class="d-none" 
                                               id="keyFileUpload" 
                                               accept=".key,.pem">
                                        <button class="btn btn-outline-secondary" 
                                                type="button"
                                                onclick="document.getElementById('keyFileUpload').click()">
                                            <i class="bi bi-upload"></i>
                                        </button>
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>

        <!-- DKIM Settings -->
        <div class="card mb-4">
            <div class="card-header collapsed" data-bs-toggle="collapse" data-bs-target="#dkimSettings" aria-expanded="false">
                <h5 class="mb-0 d-flex justify-content-between align-items-center">
                    <span><i class="bi bi-key me-2"></i>DKIM Configuration</span>
                    <i class="bi bi-chevron-down"></i>
                </h5>
            </div>
            <div id="dkimSettings" class="collapse">
                <div class="card-body">
                    <div class="setting-section">
                        <div class="mb-3">
                            <label class="form-label">DKIM Key Size</label>
                            <div class="setting-description">RSA key size for new DKIM keys (larger = more secure, slower)</div>
                            <select class="form-select" name="DKIM.dkim_key_size">
                                <option value="1024" {{ 'selected' if settings['DKIM']['dkim_key_size'] == '1024' else '' }}>1024 bits</option>
                                <option value="2048" {{ 'selected' if settings['DKIM']['dkim_key_size'] == '2048' else '' }}>2048 bits (Recommended)</option>
                                <option value="4096" {{ 'selected' if settings['DKIM']['dkim_key_size'] == '4096' else '' }}>4096 bits</option>
                            </select>
                        </div>
                        <div class="mb-3">
                            <label class="form-label">SPF Server IP</label>
                            <div class="setting-description">Public IP address of server for SPF records (used if auto-detection fails)</div>
                            <div class="input-group">
                                <input type="text" 
                                       class="form-control" 
                                       name="DKIM.spf_server_ip" 
                                       value="{{ settings['DKIM']['spf_server_ip'] }}"
                                       pattern="^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$">
                                <button class="btn btn-danger" type="button" onclick="getPublicIP()">
                                    <i class="bi bi-cloud-download me-1"></i>
                                    Get Public IP
                                </button>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>

        <!-- Save Button -->
        <div class="d-flex justify-content-between align-items-center">
            <div class="alert alert-warning d-flex align-items-center mb-0">
                <i class="bi bi-exclamation-triangle me-2"></i>
                <small>Server restart required after changing settings</small>
            </div>
            <button type="submit" class="btn btn-primary btn-lg">
                <i class="bi bi-save me-2"></i>
                Save Settings
            </button>
        </div>
    </form>
</div>

<!-- Reset Confirmation Modal -->
<div class="modal fade" id="resetModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">Reset Settings</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <p>Are you sure you want to reset all settings to their default values?</p>
                <p class="text-warning"><strong>Warning:</strong> This action cannot be undone.</p>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Cancel</button>
                <button type="button" class="btn btn-warning" onclick="confirmReset()">Reset Settings</button>
            </div>
        </div>
    </div>
</div>
{% endblock %}

{% block extra_js %}
<script>
    function resetToDefaults() {
        new bootstrap.Modal(document.getElementById('resetModal')).show();
    }
    
    function confirmReset() {
        // This would need to be implemented as a separate endpoint
        // For now, just redirect to a reset URL
        window.location.href = '{{ url_for("email.settings") }}?reset=true';
    }
    
    function exportSettings() {
        // Create a downloadable config file
        const settings = {};
        const formData = new FormData(document.querySelector('form'));
        
        for (let [key, value] of formData.entries()) {
            const [section, setting] = key.split('.');
            if (!settings[section]) {
                settings[section] = {};
            }
            settings[section][setting] = value;
        }
        
        const configText = generateConfigFile(settings);
        downloadFile('settings.ini', configText);
    }
    
    function generateConfigFile(settings) {
        let config = '';
        for (const [section, values] of Object.entries(settings)) {
            config += `[${section}]\n`;
            for (const [key, value] of Object.entries(values)) {
                config += `${key} = ${value}\n`;
            }
            config += '\n';
        }
        return config;
    }
    
    function downloadFile(filename, content) {
        const element = document.createElement('a');
        element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(content));
        element.setAttribute('download', filename);
        element.style.display = 'none';
        document.body.appendChild(element);
        element.click();
        document.body.removeChild(element);
    }
    
    // Form validation
    document.querySelector('form').addEventListener('submit', function(e) {
        // Basic validation
        const ports = ['Server.smtp_port', 'Server.smtp_tls_port'];
        for (const portField of ports) {
            const input = document.querySelector(`[name="${portField}"]`);
            const port = parseInt(input.value);
            if (port < 1 || port > 65535) {
                e.preventDefault();
                alert(`Invalid port number: ${port}. Must be between 1 and 65535.`);
                input.focus();
                return;
            }
        }
        
        // Check if ports are different
        const smtpPort = document.querySelector('[name="Server.smtp_port"]').value;
        const tlsPort = document.querySelector('[name="Server.smtp_tls_port"]').value;
        if (smtpPort === tlsPort) {
            e.preventDefault();
            alert('SMTP and TLS ports must be different.');
            return;
        }
    });

    function restartSmtpServer() {
        showConfirmation("Are you sure you want to restart the SMTP server?", "Restart SMTP Server", "Restart", "btn-danger").then(confirmed => {
            if (!confirmed) return;
            const btn = document.getElementById('restart-smtp-btn');
            btn.disabled = true;
            btn.innerHTML = '<span class="spinner-border spinner-border-sm"></span> Restarting...';
            fetch('/api/server/restart', {method: 'POST'})
                .then(response => response.json())
                .then(data => {
                    if (data.status === 'success') {
                        showToast(data.message || 'SMTP server restarted.', 'success');
                    } else {
                        showToast(data.message || 'Failed to restart SMTP server.', 'danger');
                    }
                })
                .catch(() => showToast('Failed to restart SMTP server.', 'danger'))
                .finally(() => {
                    btn.disabled = false;
                    btn.innerHTML = '<i class="bi bi-arrow-repeat me-2"></i> Restart SMTP Server';
                });
        });
    }

    // Handle certificate file uploads
    document.getElementById('certFileUpload').addEventListener('change', function(e) {
        const file = e.target.files[0];
        if (!file) return;
        
        const formData = new FormData();
        formData.append('cert_file', file);
        
        fetch('{{ url_for("email.upload_cert") }}', {
            method: 'POST',
            body: formData
        })
        .then(response => response.json())
        .then(data => {
            if (data.status === 'success') {
                document.querySelector('[name="TLS.tls_cert_file"]').value = data.filepath;
                showToast('Certificate file uploaded successfully', 'success');
            } else {
                showToast(data.message || 'Failed to upload certificate file', 'danger');
            }
        })
        .catch(() => showToast('Failed to upload certificate file', 'danger'));
    });

    document.getElementById('keyFileUpload').addEventListener('change', function(e) {
        const file = e.target.files[0];
        if (!file) return;
        
        const formData = new FormData();
        formData.append('key_file', file);
        
        fetch('{{ url_for("email.upload_key") }}', {
            method: 'POST',
            body: formData
        })
        .then(response => response.json())
        .then(data => {
            if (data.status === 'success') {
                document.querySelector('[name="TLS.tls_key_file"]').value = data.filepath;
                showToast('Key file uploaded successfully', 'success');
            } else {
                showToast(data.message || 'Failed to upload key file', 'danger');
            }
        })
        .catch(() => showToast('Failed to upload key file', 'danger'));
    });

    // Handle database examples
    function setDatabaseExample(type) {
        const urlInput = document.getElementById('databaseUrl');
        switch(type) {
            case 'sqlite':
                urlInput.value = 'sqlite:///email_server/server_data/smtp_server.db';
                break;
            case 'mysql':
                urlInput.value = 'mysql://user:password@localhost:3306/dbname';
                break;
            case 'postgresql':
                urlInput.value = 'postgresql://user:password@localhost:5432/dbname';
                break;
            case 'mssql':
                urlInput.value = 'mssql+pyodbc://user:password@server:1433/dbname?driver=ODBC+Driver+17+for+SQL+Server';
                break;
        }
    }

    // Test database connection
    function testDatabaseConnection() {
        const url = document.getElementById('databaseUrl').value;
        fetch('{{ url_for("email.test_database_connection_endpoint") }}', {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json',
                'Accept': 'application/json'
            },
            body: JSON.stringify({ url: url })
        })
        .then(response => response.json())
        .then(data => {
            showToast(data.message || (data.status === 'success' ? 'Database connection successful!' : 'Failed to connect to database'), 
                     data.status === 'success' ? 'success' : 'danger');
        })
        .catch(() => showToast('Failed to test database connection', 'danger'));
    }

    // Get public IP
    function getPublicIP() {
        fetch('{{ url_for("email.get_server_ip") }}')
        .then(response => response.json())
        .then(data => {
            if (data.ip) {
                document.querySelector('[name="DKIM.spf_server_ip"]').value = data.ip;
                showToast('Public IP fetched successfully', 'success');
            } else {
                showToast('Failed to fetch public IP', 'danger');
            }
        })
        .catch(() => showToast('Failed to fetch public IP', 'danger'));
    }

    // Handle form submission
    document.getElementById('settingsForm').addEventListener('submit', function(e) {
        // Handle empty server banner
        const serverBanner = document.querySelector('[name="Server.server_banner"]');
        if (serverBanner && !serverBanner.value.trim()) {
            serverBanner.value = '""';
        }

        // Log form data being submitted
        const formData = new FormData(this);
        console.log('Submitting settings with data:');
        for (let [key, value] of formData.entries()) {
            console.log(`${key}: ${value}`);
        }
    });
</script>
{% endblock %}