//! Command types for CMS domain operations.
//!
//! Following the `NewXxx` / `XxxPatch` pattern from clean architecture,
//! these types encapsulate the input data for create/update operations
//! on domain entities. They decouple presentation DTOs from the entity
//! mutation surface and provide a clear boundary for validation.

use std::collections::HashMap;

use super::settings::InternetMode;

// ---------------------------------------------------------------------------
// Settings
// ---------------------------------------------------------------------------

/// Partial update command for `Settings`.
///
/// Every field is `Option`al — only non-`None` fields are applied to the
/// existing settings instance. Use `apply_to()` to merge into a `Settings`
/// value.
#[derive(Debug, Clone, Default)]
pub struct SettingsPatch {
    /// Override the internet access mode.
    pub internet_mode: Option<String>,
    /// Override the active provider name.
    pub provider: Option<String>,
    /// Override the active model name.
    pub model: Option<String>,
    /// Replace the entire API-keys map.
    pub api_keys: Option<HashMap<String, String>>,
    /// Override the max tokens for completions.
    pub max_tokens: Option<Option<u32>>,
    /// Override the temperature for completions.
    pub temperature: Option<Option<f32>>,
    /// Override the review max lessons per run.
    pub review_max_lessons_per_run: Option<usize>,
    /// Override the adaptive review max skip count.
    pub adaptive_review_max_skip: Option<u32>,
    /// Override the verify shell command.
    pub verify_command: Option<Option<String>>,
    /// Override the verify timeout in milliseconds.
    pub verify_timeout_ms: Option<u64>,
    /// Override the max concurrency for workflow execution.
    pub workflow_max_concurrency: Option<usize>,
    /// Override the review-enabled flag.
    pub review_enabled: Option<bool>,
    /// Override the session-archive-enabled flag.
    pub session_archive_enabled: Option<bool>,
    /// Override the LSP auto-provision flag.
    pub lsp_auto_provision: Option<bool>,
    /// Override the list of LSP-managed languages.
    pub lsp_languages: Option<Vec<String>>,
    /// Override the hive-mind node timeout in milliseconds.
    pub hive_mind_node_timeout_ms: Option<u64>,
}

impl SettingsPatch {
    /// Merge this patch into `settings`, overwriting each non-`None` field.
    ///
    /// Flow: for each optional field, if `Some`, assign it to the target.
    ///
    /// ## Errors
    /// Returns `Err` with a message if `internet_mode` is set to an
    /// unrecognised value.
    pub fn apply_to(&self, settings: &mut super::settings::Settings) -> Result<(), String> {
        if let Some(ref val) = self.internet_mode {
            settings.internet_mode = match val.as_str() {
                "Off" => InternetMode::Off,
                "ReadOnly" => InternetMode::ReadOnly,
                "Full" => InternetMode::Full,
                _ => {
                    return Err(format!(
                        "invalid internet_mode '{val}'; expected Off, ReadOnly, or Full"
                    ))
                }
            };
        }
        if let Some(ref val) = self.provider {
            settings.provider = val.clone();
        }
        if let Some(ref val) = self.model {
            settings.model = val.clone();
        }
        if let Some(ref val) = self.api_keys {
            settings.api_keys = val.clone();
        }
        if let Some(val) = self.max_tokens {
            settings.max_tokens = val;
        }
        if let Some(val) = self.temperature {
            settings.temperature = val;
        }
        if let Some(val) = self.review_max_lessons_per_run {
            settings.review_max_lessons_per_run = val;
        }
        if let Some(val) = self.adaptive_review_max_skip {
            settings.adaptive_review_max_skip = val;
        }
        if let Some(ref val) = self.verify_command {
            settings.verify_command = val.clone();
        }
        if let Some(val) = self.verify_timeout_ms {
            settings.verify_timeout_ms = val;
        }
        if let Some(val) = self.workflow_max_concurrency {
            settings.workflow_max_concurrency = val;
        }
        if let Some(val) = self.review_enabled {
            settings.flags.review_enabled = val;
        }
        if let Some(val) = self.session_archive_enabled {
            settings.flags.session_archive_enabled = val;
        }
        if let Some(val) = self.lsp_auto_provision {
            settings.flags.lsp_auto_provision = val;
        }
        if let Some(ref val) = self.lsp_languages {
            settings.lsp_languages = val.clone();
        }
        if let Some(val) = self.hive_mind_node_timeout_ms {
            settings.hive_mind_node_timeout_ms = val;
        }
        Ok(())
    }
}

// ---------------------------------------------------------------------------
// Memory
// ---------------------------------------------------------------------------

/// Command to create a new memory entry.
///
/// All required fields are non-optional; optional fields use `Option`
/// and default to sensible values (empty or the service default).
#[derive(Debug, Clone)]
pub struct NewMemory {
    /// Unique name / slug for the memory.
    pub name: String,
    /// One-line summary of what the memory captures.
    pub description: String,
    /// The full memory content.
    pub content: String,
    /// Category kind (defaults to "reference" in the handler).
    pub kind: Option<String>,
    /// Outcome of the remembered action.
    pub outcome: Option<String>,
    /// Lifecycle stage (defaults to "new" in the handler).
    pub lifecycle: Option<String>,
    /// Scope context for the memory.
    pub scope: Option<String>,
    /// Code snippet captured before the action.
    pub before_snippet: Option<String>,
    /// Code snippet captured after the action.
    pub after_snippet: Option<String>,
    /// Source provenances (files, conversations, etc.).
    pub provenances: Option<Vec<String>>,
}