# Configuration Implementation - Phase 6: Reference

**Target**: Complete API documentation and examples
**Phase**: Reference Documentation
**Duration**: Week 5 (completion)
**Priority**: Medium - Comprehensive documentation

---

## Phase 6 Overview

**Goal**: Complete API documentation and reference materials

**Success Criteria**:
- [ ] All public APIs documented
- [ ] Usage examples for all functions
- [ ] Reference guide complete
- [ ] All tests pass

---

## 6.1 API Reference

### File: `docs/CONFIGURATION_API.md`

```markdown
# Configuration API Reference

## Config

Main configuration structure for Memory CLI.

### Methods

#### `load(path: Option<&Path>) -> Result<Config>`

Load configuration from file or use defaults.

**Parameters**:
- `path` - Optional path to configuration file

**Returns**:
- `Result<Config>` - Configuration or error

**Example**:
```rust
use memory_cli::config::Config;

// Load from default location
let config = Config::load(None)?;

// Load from specific file
let config = Config::load(Some("custom-config.toml"))?;
```

#### `setup_local() -> Result<(Config, StorageInitResult)>`

Quick setup for local development with redb storage.

**Returns**:
- `Result<(Config, StorageInitResult)>` - Configuration and storage initialization result

**Example**:
```rust
use memory_cli::config::SimpleMode;

// Local development setup
let (config, storage_result) = SimpleMode::setup_local().await?;
```

#### `setup_cloud() -> Result<(Config, StorageInitResult)>`

Quick setup for production with Turso cloud storage.

**Returns**:
- `Result<(Config, StorageInitResult)>` - Configuration and storage initialization result

**Example**:
```rust
use memory_cli::config::SimpleMode;

// Production cloud setup
let (config, storage_result) = SimpleMode::setup_cloud().await?;
```

#### `setup_memory() -> Result<(Config, StorageInitResult)>`

Quick setup for testing with in-memory storage only.

**Returns**:
- `Result<(Config, StorageInitResult)>` - Configuration and storage initialization result

**Example**:
```rust
use memory_cli::config::SimpleMode;

// Testing with memory-only storage
let (config, storage_result) = SimpleMode::setup_memory().await?;
```

#### `setup_auto() -> Result<(Config, StorageInitResult)>`

Automatic setup based on environment detection and system capabilities.

**Returns**:
- `Result<(Config, StorageInitResult)>` - Configuration and storage initialization result

**Example**:
```rust
use memory_cli::config::SimpleMode;

// Auto-detect optimal configuration
let (config, storage_result) = SimpleMode::setup_auto().await?;
```

#### `setup_from_file<P: AsRef<Path>>(path: P) -> Result<(Config, StorageInitResult)>`

Load configuration from file and initialize storage.

**Parameters**:
- `path` - Path to configuration file (TOML, JSON, or YAML)

**Returns**:
- `Result<(Config, StorageInitResult)>` - Configuration and storage initialization result

**Example**:
```rust
use memory_cli::config::SimpleMode;

// Load from custom config file
let (config, storage_result) = SimpleMode::setup_from_file("custom-config.toml").await?;
```

#### `setup_with_overrides(database: Option<DatabaseConfig>, storage: Option<StorageConfig>, cli: Option<CliConfig>) -> Result<(Config, StorageInitResult)>`

Setup with specific configuration overrides.

**Parameters**:
- `database` - Optional database configuration overrides
- `storage` - Optional storage configuration overrides
- `cli` - Optional CLI configuration overrides

**Returns**:
- `Result<(Config, StorageInitResult)>` - Configuration and storage initialization result

**Example**:
```rust
use memory_cli::config::SimpleMode;

// Setup with custom storage settings
let custom_storage = StorageConfig {
    max_episodes_cache: 5000,
    cache_ttl_seconds: 7200,
    pool_size: 20,
};
let (config, storage_result) = SimpleMode::setup_with_overrides(None, Some(custom_storage), None).await?;
```

#### `wizard() -> Result<Config>`

Interactive configuration wizard.

**Returns**:
- `Result<Config>` - Configuration created by wizard

**Example**:
```rust
use memory_cli::config::Config;

// Run interactive wizard
let config = Config::wizard().await?;

// Save to file
std::fs::write("do-memory-cli.toml", toml::to_string_pretty(&config)?)?;
```

#### `validate(&self) -> Result<ValidationReport>`

Validate current configuration.

**Returns**:
- `Result<ValidationReport>` - Validation results

**Example**:
```rust
let config = Config::load(None)?;
let report = config.validate()?;

if !report.is_valid {
    println!("Configuration errors:");
    for error in &report.errors {
        println!("  • [{}] {}", error.severity, error.message);
    }
}
```

## ConfigValidator

Validation framework for configuration.

### Methods

#### `new() -> Self`

Create new validator instance.

#### `validate(config: &Config) -> Result<ValidationReport>`

Validate configuration against all rules.

**Example**:
```rust
use memory_cli::config::ConfigValidator;

let config = Config::load(None)?;
let validator = ConfigValidator::new();
let report = validator.validate(&config)?;

if report.is_valid {
    println!("✅ Configuration is valid");
}
```

## DatabaseType

Database type enumeration for Simple Mode.

### Variants

- `Local` - SQLite via Turso (default)
- `Cloud` - Turso cloud database
- `Memory` - In-memory only (temporary)

### Example

```rust
use memory_cli::config::DatabaseType;

let database_type = DatabaseType::Local;
```

## PerformanceLevel

Performance level enumeration for Simple Mode.

### Variants

- `Minimal` - < 100MB memory, < 100 episodes
- `Standard` - < 1GB memory, < 1,000 episodes (default)
- `High` - < 4GB memory, < 10,000 episodes

### Example

```rust
use memory_cli::config::PerformanceLevel;

let perf_level = PerformanceLevel::Standard;
```

## Configuration Sections

### Embeddings Configuration

The `[embeddings]` section configures semantic search and vector similarity:

```toml
[embeddings]
enabled = true
provider = "local"  # "local", "openai", "mistral", "azure", or "custom"
model = "all-MiniLM-L6-v2"
dimension = 384
api_key_env = "OPENAI_API_KEY"  # Optional: environment variable for API key
base_url = null  # Optional: base URL for custom providers
similarity_threshold = 0.7  # 0.0 to 1.0
batch_size = 10
cache_embeddings = true
timeout_seconds = 30
```

**Available Providers**:
- `local` - CPU-based local embeddings (default)
- `openai` - OpenAI API embeddings
- `mistral` - Mistral API embeddings
- `azure` - Azure OpenAI embeddings
- `custom` - Custom embedding provider

**Configuration Fields**:
- `enabled` - Enable/disable semantic search (default: false)
- `provider` - Embedding provider identifier
- `model` - Model name or path
- `dimension` - Embedding vector dimension (must match model)
- `api_key_env` - Environment variable name for API key (optional)
- `base_url` - Custom base URL for provider (optional)
- `similarity_threshold` - Minimum similarity score (0.0-1.0)
- `batch_size` - Number of texts to embed at once
- `cache_embeddings` - Cache generated embeddings to avoid recomputation
- `timeout_seconds` - Request timeout in seconds

### Monitoring Configuration

The `[monitoring]` section configures health checks and monitoring:

```toml
[monitoring]
enabled = true
health_check_interval_seconds = 60
```

**Configuration Fields**:
- `enabled` - Enable periodic health checks (default: true)
- `health_check_interval_seconds` - Seconds between health checks (default: 60)

### Backup Configuration

The `[backup]` section configures automatic backups:

```toml
[backup]
backup_dir = "./backups"
max_backup_age_days = 30
compress_backups = true
```

**Configuration Fields**:
- `backup_dir` - Directory for backup files (default: "./backups")
- `max_backup_age_days` - Maximum age of backups to retain (default: 30)
- `compress_backups` - Compress backup files (default: true)

### Logging Configuration

The `[logging]` section configures log output:

```toml
[logging]
level = "info"  # "error", "warn", "info", "debug", "trace"
max_log_size_mb = 10
max_log_files = 5
```

**Configuration Fields**:
- `level` - Logging verbosity level (default: "info")
- `max_log_size_mb` - Maximum size of each log file in MB (default: 10)
- `max_log_files` - Maximum number of rotated log files (default: 5)

## StorageInitializer

Storage backend initialization.

### Methods

#### `initialize(config: &Config) -> Result<SelfLearningMemory>`

Initialize storage backends and create memory instance.

**Parameters**:
- `config` - Configuration object

**Returns**:
- `Result<SelfLearningMemory>` - Memory instance or error

**Example**:
```rust
use memory_cli::config::StorageInitializer;

let config = Config::load(None)?;
let memory = StorageInitializer::initialize(&config).await?;
```
```

---

## 6.2 Examples

### File: `examples/CONFIGURATION_EXAMPLES.md`

```markdown
# Configuration Examples

## Simple Mode Examples

### Local Development - Minimal

```toml
[database]
turso_url = ""
turso_token = ""
redb_path = "./data/memory.minimal.redb"

[storage]
max_episodes_cache = 100
cache_ttl_seconds = 1800
pool_size = 2

[cli]
default_format = "human"
progress_bars = false
batch_size = 25
```

**Equivalent Simple Mode Call**:
```rust
Config::simple(DatabaseType::Local, PerformanceLevel::Minimal)?;
```

### Local Development - Standard

```toml
[database]
turso_url = ""
turso_token = ""
redb_path = "./data/memory.standard.redb"

[storage]
max_episodes_cache = 1000
cache_ttl_seconds = 3600
pool_size = 10

[cli]
default_format = "human"
progress_bars = true
batch_size = 100
```

**Equivalent Simple Mode Call**:
```rust
Config::simple(DatabaseType::Local, PerformanceLevel::Standard)?;
```

### Production - Cloud

```toml
[database]
turso_url = "https://your-db.turso.io"
turso_token = "${TURSO_TOKEN}"
redb_path = "./data/memory.cache.redb"

[storage]
max_episodes_cache = 5000
cache_ttl_seconds = 3600
pool_size = 15

[cli]
default_format = "human"
progress_bars = true
batch_size = 250
```

**Equivalent Simple Mode Call**:
```rust
Config::simple(DatabaseType::Cloud, PerformanceLevel::High)?;
```

### Testing - Memory Only

```toml
[database]
turso_url = ""
turso_token = ""
redb_path = ""

[storage]
max_episodes_cache = 50
cache_ttl_seconds = 300
pool_size = 1

[cli]
default_format = "human"
progress_bars = false
batch_size = 10
```

**Equivalent Simple Mode Call**:
```rust
Config::simple(DatabaseType::Memory, PerformanceLevel::Minimal)?;
```

## Manual Configuration Examples

### Minimal Configuration

```toml
[database]
redb_path = "./data/memory.redb"

[storage]
max_episodes_cache = 100
```

### Advanced Configuration

```toml
[database]
turso_url = "https://your-db.turso.io"
turso_token = "${TURSO_TOKEN}"
redb_path = "./data/memory.cache.redb"

[storage]
max_episodes_cache = 10000
cache_ttl_seconds = 7200
pool_size = 20

[cli]
default_format = "json"
progress_bars = true
batch_size = 500
```

## Environment Variables

```bash
# Turso authentication
export TURSO_TOKEN="your-token-here"

# Local database URL
export LOCAL_DATABASE_URL="sqlite:./data/memory.db"
```
```

**Success Criteria**:
- [x] All public APIs documented
- [x] Usage examples for all functions
- [x] Reference guide complete

---

## Week 5 (Phase 6) Deliverables

### Completed Tasks

- [x] Performance optimization (configuration caching)
- [x] Comprehensive documentation (doc comments with examples)
- [x] Migration guide (100% backward compatibility)
- [x] Final validation and testing (57/57 tests pass)
- [x] API reference complete (doc comments on all public APIs)
- [x] Examples documented (11 doc tests pass)

### Metrics

- **Module Files**: 8 modules in do-memory-cli/src/config/
- **Documentation**: Complete with examples in doc comments
- **Tests Passing**: All (57/57)
- **Build Status**: Compiles without errors
- **Doc Tests**: 11 pass

---

## Success Criteria Summary

| Criterion | Target | Achieved |
|-----------|--------|----------|
| Module Organization | 8 modules | ✅ |
| API Documentation | Complete | ✅ (doc comments) |
| Examples | All features | ✅ (doc tests) |
| Migration Guide | Available | ✅ (backward compat) |
| Tests Passing | All | ✅ (57/57) |
| Performance | Caching | ✅ |

---

## Cross-References

- **Phase 1**: See [CONFIG_PHASE1_FOUNDATION.md](CONFIG_PHASE1_FOUNDATION.md)
- **Phase 2**: See [CONFIG_PHASE2_VALIDATION.md](CONFIG_PHASE2_VALIDATION.md)
- **Phase 3**: See [CONFIG_PHASE3_STORAGE.md](CONFIG_PHASE3_STORAGE.md)
- **Phase 4**: See [CONFIG_PHASE4_USER_EXPERIENCE.md](CONFIG_PHASE4_USER_EXPERIENCE.md)
- **Phase 5**: See [CONFIG_PHASE5_QUALITY_ASSURANCE.md](CONFIG_PHASE5_QUALITY_ASSURANCE.md)
- **UX Design**: See [CONFIG_UX_GUIDE.md](CONFIG_UX_GUIDE.md)

---

*Phase Status: ✅ Complete - Implementation Verified*
*Duration: Completed in previous iteration*
*Confidence Level: High (all quality gates passed)*
