# Docker Compose Examples Analysis

This document analyzes various docker-compose.yml examples to identify patterns, edge cases, and implementation requirements for Stronghold.

## Common Patterns

### Basic Server Setup

**Pattern Elements**:
- Image: `itzg/minecraft-server`
- Required: `EULA=TRUE`
- Port mapping: `25565:25565`
- Volume: Persistent data storage
- Environment variables for configuration

### Modded Server Setup

**Pattern Elements**:
- `TYPE`: FORGE, FABRIC, or other mod loader
- `MODPACK` or `MODS`: Modpack/mod installation
- Additional memory allocation
- Mod volume mounts (`/mods`)
- Config volume mounts (`/config`)

### Plugin Server Setup

**Pattern Elements**:
- `TYPE`: PAPER, SPIGOT, BUKKIT
- Plugin volume mounts (`/plugins`)
- `PLUGINS` environment variable or volume

### Proxy Server Setup

**Pattern Elements**:
- Image: `itzg/mc-proxy`
- `PROXY_TYPE`: BUNGEE, VELOCITY, WATERFALL
- Backend server configuration
- Network linking

## Edge Cases to Handle

### 1. Multiple Mod Sources
```yaml
environment:
  COPY_MODS_SRC: /mods-common,/mods-local
volumes:
  - ../shared-mods:/mods-common:ro
  - ./local-mods:/mods-local:ro
```
**Stronghold needs**: UI to manage multiple mod source directories

### 2. Generic Pack with Custom Configuration
```yaml
environment:
  GENERIC_PACK: https://example.com/server-pack.zip
  GENERIC_PACKS_DISABLE_MODS: "conflicting-mod.jar"
  APPLY_EXTRA_FILES: "config/server.properties<https://example.com/custom.properties"
```
**Stronghold needs**: Support for generic packs and file patching

### 3. Environment Variable Substitution in Configs
```yaml
environment:
  REPLACE_ENV_SUFFIXES: "yml,yaml,properties,json"
  REPLACE_ENV_VARIABLES_EXCLUDES: "secrets.yml"
volumes:
  - ./config:/config
```
**Stronghold needs**: UI for managing env var substitution rules

### 4. Auto-removal of Mods/Plugins
```yaml
environment:
  REMOVE_OLD_MODS: "TRUE"
  REMOVE_OLD_MODS_INCLUDE: "*.jar"
  REMOVE_OLD_MODS_EXCLUDE: "core-mod.jar"
  REMOVE_OLD_MODS_DEPTH: 1
```
**Stronghold needs**: Options for mod/plugin cleanup behavior

### 5. Multiple Generic Packs with Prefix/Suffix
```yaml
environment:
  GENERIC_PACKS: configs-v9.0.1,mods-v4.3.6
  GENERIC_PACKS_PREFIX: "https://cdn.example.org/"
  GENERIC_PACKS_SUFFIX: ".zip"
```
**Stronghold needs**: Support for batch generic pack installation

### 6. Mod/Plugin URL Lists via File
```yaml
environment:
  MODS_FILE: /extras/mods.txt
volumes:
  - ./mods-list.txt:/extras/mods.txt:ro
```
**Stronghold needs**: File-based mod/plugin list management

### 7. Custom Copy Destinations
```yaml
environment:
  COPY_PLUGINS_SRC: /plugins-custom
  COPY_PLUGINS_DEST: /data/plugins
  COPY_MODS_SRC: /mods-custom
  COPY_MODS_DEST: /data/mods
  COPY_CONFIG_SRC: /config-custom
  COPY_CONFIG_DEST: /data/config
```
**Stronghold needs**: Advanced volume mount configuration options

### 8. Multi-Server Network with Proxy
**Complex Setup**:
- Multiple backend servers
- Proxy server
- Internal Docker network
- Port mapping coordination
- Service dependencies

**Stronghold needs**: Multi-container orchestration UI

### 9. Modpack Updates with Checksum Control
```yaml
environment:
  MODPACK: modrinth:abc123
  SKIP_GENERIC_PACK_CHECKSUM: "false"
  SKIP_GENERIC_PACK_UPDATE_CHECK: "false"
  FORCE_GENERIC_PACK_UPDATE: "true"
```
**Stronghold needs**: Modpack update management UI

### 10. Hybrid Server (Mods + Plugins)
```yaml
environment:
  TYPE: MAGMA  # or other hybrid type
  USES_PLUGINS: "true"
volumes:
  - ./mods:/mods
  - ./plugins:/plugins
```
**Stronghold needs**: Detection and configuration of hybrid server types

## Configuration Complexity Levels

### Level 1: Simple
- Basic vanilla server
- Minimal configuration
- Default settings

**Stronghold UI**: Simple wizard, minimal options

### Level 2: Standard
- Common server types (Paper, Forge, Fabric)
- Standard modpack installation
- Basic resource allocation

**Stronghold UI**: Guided setup with sensible defaults

### Level 3: Advanced
- Custom configurations
- Multiple mod sources
- Environment variable substitution
- Custom volumes

**Stronghold UI**: Advanced options panel, expert mode

### Level 4: Expert
- Edge cases
- Manual docker-compose editing
- Complex network setups
- Custom scripts

**Stronghold UI**: YAML editor with validation, export/import

## Stronghold Implementation Priorities

### Phase 1 (MVP)
- Level 1 configurations (simple servers)
- Basic modpack installation (MODPACK env var)
- Standard volume mounts

### Phase 2 (V1.0)
- Level 2 configurations
- Individual mod/plugin management
- Multiple mod sources
- Basic generic pack support

### Phase 3 (V1.5+)
- Level 3 configurations
- Advanced volume mount options
- Environment variable substitution UI
- Multi-server orchestration

### Phase 4 (Future)
- Level 4 expert mode
- YAML editor/validator
- Import existing docker-compose files
- Template marketplace

## Key Takeaways

1. **Most users need Level 1-2**: Focus UI on these first
2. **Edge cases are powerful**: Support them but don't make them required
3. **Flexibility is key**: Allow export to docker-compose.yml for advanced users
4. **Validate configurations**: Check for conflicts and errors before applying
5. **Presets help**: Provide templates for common scenarios
6. **Documentation**: Link to itzg docs for advanced features