# Summary: Multi-Database Configuration with Presets

## ✅ Feature Implemented!

**Yes!** The `database.xml` configuration file now includes **preset configurations** for both SQLite and PostgreSQL, making it easy to switch between database providers.

## 🎯 What Was Added

### 1. Preset Configurations in database.xml

The configuration file now includes a `<PresetConfigurations>` section with example configurations for:

- **SQLite** (default) - Single-file database
- **PostgreSQL-Local** - PostgreSQL on localhost

### 2. New Configuration Classes

**PresetDatabaseConfiguration.cs** - Stores template database configurations

```csharp
public class PresetDatabaseConfiguration
{
    public string? DatabaseType { get; set; }
    public CustomDatabaseOptions? CustomProviderOptions { get; set; }
    public DatabaseLockingBehaviorTypes LockingBehavior { get; set; }
    public string? Description { get; set; }
}
```

**Updated DatabaseConfigurationOptions.cs** - Added PresetConfigurations property

```csharp
public Dictionary<string, PresetDatabaseConfiguration>? PresetConfigurations { get; set; }
```

## 📄 Configuration File Structure

The `database.xml` file now looks like this:

```xml
<DatabaseConfigurationOptions>
  
  <!-- ACTIVE CONFIGURATION -->
  <DatabaseType>Jellyfin-SQLite</DatabaseType>
  <LockingBehavior>NoLock</LockingBehavior>
  
  <!-- POSTGRESQL OPTIONS (when needed) -->
  <CustomProviderOptions>
    <!-- PostgreSQL settings -->
  </CustomProviderOptions>
  
  <!-- PRESET CONFIGURATIONS (Templates) -->
  <PresetConfigurations>
    <PresetConfiguration>
      <key>SQLite</key>
      <value>
        <DatabaseType>Jellyfin-SQLite</DatabaseType>
        <Description>Default SQLite database</Description>
      </value>
    </PresetConfiguration>
    
    <PresetConfiguration>
      <key>PostgreSQL-Local</key>
      <value>
        <DatabaseType>Jellyfin-PostgreSQL</DatabaseType>
        <Description>PostgreSQL on localhost</Description>
      </value>
    </PresetConfiguration>
  </PresetConfigurations>
  
</DatabaseConfigurationOptions>
```

## 🔄 How to Switch Databases

### Step 1: Stop Jellyfin
```bash
sudo systemctl stop jellyfin
```

### Step 2: Edit database.xml

**To use SQLite:**
```xml
<DatabaseType>Jellyfin-SQLite</DatabaseType>
<!-- Remove or comment out CustomProviderOptions -->
```

**To use PostgreSQL:**
```xml
<DatabaseType>Jellyfin-PostgreSQL</DatabaseType>
<CustomProviderOptions>
  <PluginName>Jellyfin.Database.Providers.Postgres</PluginName>
  <PluginAssembly>Jellyfin.Database.Providers.Postgres.dll</PluginAssembly>
  <ConnectionString></ConnectionString>
  <Options>
    <CustomDatabaseOption>
      <Key>host</Key>
      <Value>localhost</Value>
    </CustomDatabaseOption>
    <CustomDatabaseOption>
      <Key>database</Key>
      <Value>jellyfin</Value>
    </CustomDatabaseOption>
    <CustomDatabaseOption>
      <Key>username</Key>
      <Value>jellyfin</Value>
    </CustomDatabaseOption>
    <CustomDatabaseOption>
      <Key>password</Key>
      <Value>your_password</Value>
    </CustomDatabaseOption>
  </Options>
</CustomProviderOptions>
```

### Step 3: Start Jellyfin
```bash
sudo systemctl start jellyfin
```

## 📍 Configuration File Location

- **Linux**: `/etc/jellyfin/database.xml` or `~/.config/jellyfin/database.xml`
- **Windows**: `%ProgramData%\Jellyfin\config\database.xml`
- **Docker**: `/config/database.xml` (in your config volume)

## 💡 Key Benefits

1. **✅ No need to remember syntax** - Examples are right in the file
2. **✅ Quick reference** - See all available options at a glance
3. **✅ Easy switching** - Just change one line and add credentials
4. **✅ Self-documenting** - Descriptions explain what each preset does
5. **✅ No separate documentation needed** - Everything in one place

## 🗂️ Files Modified

### Created:
1. **src/Jellyfin.Database/Jellyfin.Database.Implementations/DbConfiguration/PresetDatabaseConfiguration.cs**
   - New class to store preset configurations

2. **database.xml.example**
   - Complete example configuration file with comments

3. **DATABASE_CONFIGURATION_GUIDE.md**
   - Comprehensive guide for database configuration

### Modified:
1. **src/Jellyfin.Database/Jellyfin.Database.Implementations/DbConfiguration/DatabaseConfigurationOptions.cs**
   - Added PresetConfigurations property

2. **Jellyfin.Server.Implementations/Extensions/ServiceCollectionExtensions.cs**
   - Added default preset creation on first startup

## 📋 Example Presets Included

### SQLite Preset
```xml
<PresetConfiguration>
  <key>SQLite</key>
  <value>
    <DatabaseType>Jellyfin-SQLite</DatabaseType>
    <LockingBehavior>NoLock</LockingBehavior>
    <Description>Default SQLite database configuration. Database stored in data directory.</Description>
  </value>
</PresetConfiguration>
```

### PostgreSQL Preset
```xml
<PresetConfiguration>
  <key>PostgreSQL-Local</key>
  <value>
    <DatabaseType>Jellyfin-PostgreSQL</DatabaseType>
    <LockingBehavior>NoLock</LockingBehavior>
    <Description>PostgreSQL database on localhost. Update Options with your database credentials.</Description>
  </value>
</PresetConfiguration>
```

## 🚀 Usage Workflow

1. **First Startup**: database.xml is created with SQLite active and presets included
2. **View Presets**: Open database.xml to see available configurations
3. **Switch Database**: 
   - Change `<DatabaseType>` to desired provider
   - Add/update `<CustomProviderOptions>` if using PostgreSQL
   - Restart Jellyfin
4. **Done**: Jellyfin now uses the new database

## 🎨 Advanced Customization

You can add your own presets to the configuration file:

```xml
<PresetConfiguration>
  <key>PostgreSQL-Production</key>
  <value>
    <DatabaseType>Jellyfin-PostgreSQL</DatabaseType>
    <LockingBehavior>Optimistic</LockingBehavior>
    <Description>PostgreSQL production server with optimistic locking</Description>
  </value>
</PresetConfiguration>
```

## ⚠️ Important Notes

1. **Presets are templates only** - They don't activate automatically
2. **Copy settings to active configuration** to use them
3. **Stop Jellyfin before editing** database.xml
4. **Protect the file** - It may contain passwords
5. **Backup before changing** database types

## 🔒 Security

```bash
# Protect database.xml
chmod 600 /etc/jellyfin/database.xml
chown jellyfin:jellyfin /etc/jellyfin/database.xml
```

## 🏗️ Build Status

✅ **Build Successful**  
✅ **No Breaking Changes**  
✅ **Backward Compatible**  
✅ **Comprehensive Documentation**  

## 📚 Documentation

Created comprehensive guides:
1. **DATABASE_CONFIGURATION_GUIDE.md** - Complete configuration reference
2. **database.xml.example** - Annotated example file
3. **This summary** - Quick reference

---

**Your database.xml file now includes preset configurations for easy switching between SQLite and PostgreSQL!** 🎉

Just edit one line (`<DatabaseType>`) and optionally add PostgreSQL credentials to switch databases. No need to remember complex configuration syntax - it's all right there in the file!
