/// Safe, deterministic automation for simple fixes
pub struct ConservativeAutomator {
    /// Only transformations with 100% success rate
    safe_transforms: Vec<SafeTransform>,

    /// Git integration for safety
    git: GitSafetyNet,

    /// Rollback capability
    rollback: RollbackManager,

    /// Configuration
    config: AutomatorConfig,
}

/// A safe, deterministic transformation
#[derive(Debug, Clone)]
pub struct SafeTransform {
    /// Transform identifier
    pub id: String,

    /// Transform name
    pub name: String,

    /// Violation types this transform handles
    pub handles: Vec<ViolationType>,

    /// Success rate (must be 1.0 for safe transforms)
    pub success_rate: f64,

    /// Transform function
    pub transform: TransformFn,
}

/// Transform function type
pub type TransformFn = fn(&Violation) -> Result<Fix>;

/// A fix to be applied
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Fix {
    /// File to fix
    pub file: PathBuf,

    /// Fix type
    pub fix_type: FixType,

    /// The actual change
    pub change: Change,

    /// Verification command
    pub verify_command: Option<String>,

    /// Branch name for the fix
    pub branch_name: String,
}

/// Types of fixes
#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
pub enum FixType {
    DeadCodeRemoval,
    UnusedImportRemoval,
    Formatting,
    SimpleRefactor,
    DocumentationFix,
}

/// The actual change to apply
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Change {
    /// Original content
    pub before: String,

    /// Fixed content
    pub after: String,

    /// Line range affected
    pub line_range: (usize, usize),
}

/// Git safety net for automated changes
pub struct GitSafetyNet {
    /// Working directory
    work_dir: PathBuf,

    /// Current branch
    original_branch: Option<String>,
}

/// Rollback manager for undoing changes
pub struct RollbackManager {
    /// Rollback points
    rollback_points: Vec<RollbackPoint>,

    /// Maximum rollback history
    max_history: usize,
}

/// A rollback point
#[derive(Debug, Clone)]
struct RollbackPoint {
    /// Timestamp
    timestamp: std::time::SystemTime,

    /// Branch name
    branch: String,

    /// Commit hash
    commit: String,

    /// Files changed
    files: Vec<PathBuf>,
}

/// Automator configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct AutomatorConfig {
    /// Enable automation
    pub enabled: bool,

    /// Require human review
    pub require_review: bool,

    /// Only apply safe transforms
    pub safe_only: bool,

    /// Create branches for fixes
    pub create_branches: bool,

    /// Auto-commit fixes
    pub auto_commit: bool,

    /// Maximum files per batch
    pub max_batch_size: usize,
}

impl Default for AutomatorConfig {
    fn default() -> Self {
        Self {
            enabled: false,
            require_review: true,
            safe_only: true,
            create_branches: false, // DISABLED: per CLAUDE.md zero-branching policy
            auto_commit: false,
            max_batch_size: 10,
        }
    }
}

/// Result of automation
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct AutomationResult {
    /// Fixes applied successfully
    pub successful: Vec<AppliedFix>,

    /// Fixes that failed
    pub failed: Vec<FailedFix>,

    /// Fixes requiring review
    pub pending_review: Vec<Fix>,

    /// Branch created (if any)
    pub branch_name: Option<String>,
}

/// Successfully applied fix
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct AppliedFix {
    pub fix: Fix,
    pub verification_passed: bool,
    pub commit_hash: Option<String>,
}

/// Failed fix
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct FailedFix {
    pub fix: Fix,
    pub error: String,
    pub can_retry: bool,
}
