swarm-engine-core 0.1.6

//! DefaultBatchManagerAgent - Core層のManagerAgent デフォルト実装
//!
//! LLM非依存の ManagerAgent 実装。TaskContext を使用して
//! BatchDecisionRequest を生成し、finalize で Guidance に変換する。
//!
//! # 設計
//!
//! ```text
//! Orchestrator
//!     │
//!     ├─ Analyzer.analyze(state) → TaskContext
//!     │
//!     ├─ DefaultBatchManagerAgent.prepare(context)
//!     │      └─ TaskContext → ContextStore → ResolvedContext → BatchDecisionRequest
//!     │
//!     ├─ BatchInvoker.invoke() → BatchInvokeResult（LLM層）
//!     │
//!     └─ DefaultBatchManagerAgent.finalize(context, responses)
//!            └─ DecisionResponse → Guidance 変換
//! ```
//!
//! LLM呼び出しは BatchInvoker（LLM層）が担当。
//! ManagerAgent 実装自体は LLM 非依存。

use std::collections::HashMap;
use std::sync::atomic::{AtomicU64, Ordering};

use crate::types::{Action, ActionParams, WorkerId};

use std::sync::Arc;

use super::batch::DecisionResponse;
use super::manager::{
    BatchDecisionRequest, ManagementDecision, ManagerAgent, ManagerId, WorkerDecisionRequest,
};
use super::worker::{FixedScopeStrategy, Guidance, ScopeStrategy, WorkerScope};
use crate::context::{
    ContextResolver, ContextStore, GlobalContext, ManagerContext, TaskContext,
    WorkerContext as WorkerCtx,
};

// ============================================================================
// DefaultBatchManagerAgent Config
// ============================================================================

/// DefaultBatchManagerAgent 設定
#[derive(Clone)]
pub struct DefaultManagerConfig {
    /// 処理間隔（Tick数）
    pub process_interval_ticks: u64,
    /// Escalation 発生時に即時処理するか
    pub immediate_on_escalation: bool,
    /// 信頼度閾値（これ以下は Continue）
    pub confidence_threshold: f64,
    /// Worker に渡す情報のスコープを決定する戦略
    pub scope_strategy: Arc<dyn ScopeStrategy>,
}

impl std::fmt::Debug for DefaultManagerConfig {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.debug_struct("DefaultManagerConfig")
            .field("process_interval_ticks", &self.process_interval_ticks)
            .field("immediate_on_escalation", &self.immediate_on_escalation)
            .field("confidence_threshold", &self.confidence_threshold)
            .field("scope_strategy", &"<dyn ScopeStrategy>")
            .finish()
    }
}

impl Default for DefaultManagerConfig {
    fn default() -> Self {
        Self {
            process_interval_ticks: 5,
            immediate_on_escalation: true,
            confidence_threshold: 0.3,
            scope_strategy: Arc::new(FixedScopeStrategy::minimal()),
        }
    }
}

// ============================================================================
// DefaultBatchManagerAgent
// ============================================================================

/// Core層の ManagerAgent デフォルト実装
///
/// # 特徴
///
/// - LLM非依存（LLM呼び出しは BatchInvoker が担当）
/// - TaskContext から BatchDecisionRequest を生成
/// - DecisionResponse を Guidance に変換
pub struct DefaultBatchManagerAgent {
    id: ManagerId,
    name: String,
    config: DefaultManagerConfig,
    last_process_tick: AtomicU64,
}

impl DefaultBatchManagerAgent {
    /// 新しい DefaultBatchManagerAgent を作成
    pub fn new(id: ManagerId) -> Self {
        Self {
            id,
            name: format!("DefaultManager_{}", id.0),
            config: DefaultManagerConfig::default(),
            last_process_tick: AtomicU64::new(0),
        }
    }

    /// 名前を指定
    pub fn with_name(mut self, name: impl Into<String>) -> Self {
        self.name = name.into();
        self
    }

    /// 設定を指定
    pub fn with_config(mut self, config: DefaultManagerConfig) -> Self {
        self.config = config;
        self
    }

    /// 処理間隔を設定
    pub fn with_interval(mut self, ticks: u64) -> Self {
        self.config.process_interval_ticks = ticks;
        self
    }

    // ========================================================================
    // Context Building
    // ========================================================================

    /// TaskContext から ContextStore を構築
    ///
    /// 全ての情報を構造化されたフォーマットに変換。
    /// Worker用のコンテキスト解決は ContextResolver が担当。
    fn build_context_store(&self, context: &TaskContext) -> ContextStore {
        let candidates = self.build_candidates(context);

        // Global context
        let mut global = GlobalContext::new(context.tick)
            .with_max_ticks(context.get_i64("max_ticks").unwrap_or(100) as u64)
            .with_progress(context.progress)
            .with_success_rate(context.success_rate);

        if let Some(task) = context.get_str("task") {
            global = global.with_task(task);
        }
        if let Some(hint) = context.get_str("hint") {
            global = global.with_hint(hint);
        }

        // Store を構築
        let mut store = ContextStore::new(context.tick);
        store.global = global;

        // Worker contexts
        for (&worker_id, summary) in &context.workers {
            let mut worker_ctx = WorkerCtx::new(worker_id)
                .with_failures(summary.consecutive_failures)
                .with_history_len(summary.history_len)
                .with_escalation(summary.has_escalation)
                .with_candidates(candidates.clone());

            if let Some(ref action) = summary.last_action {
                worker_ctx =
                    worker_ctx.with_last_action(action, summary.last_success.unwrap_or(false));
            }

            // last_output を metadata に追加
            if let Some(ref output) = summary.last_output {
                worker_ctx.metadata.insert(
                    "last_output".to_string(),
                    serde_json::Value::String(output.clone()),
                );
            }

            store.workers.insert(worker_id, worker_ctx);
        }

        // Manager context
        store.managers.insert(
            self.id,
            ManagerContext::new(self.id)
                .with_name(&self.name)
                .with_last_tick(self.last_process_tick.load(Ordering::Relaxed)),
        );

        // Escalations
        for (worker_id, escalation) in &context.escalations {
            store.escalations.push((*worker_id, escalation.clone()));
        }

        // Actions
        if let Some(ref actions) = context.available_actions {
            store.actions = Some(actions.clone());
        }

        // Metadata
        if let Some(task) = context.get_str("task") {
            store = store.insert("task", task);
        }
        if let Some(hint) = context.get_str("hint") {
            store = store.insert("hint", hint);
        }

        store
    }
    // ========================================================================
    // Internal Helpers
    // ========================================================================

    /// 処理が必要かどうかを判定
    fn should_process(&self, context: &TaskContext) -> bool {
        let tick = context.tick;
        let last_tick = self.last_process_tick.load(Ordering::Relaxed);

        // Escalation 即時処理
        if self.config.immediate_on_escalation && context.has_escalations() {
            return true;
        }

        // 間隔ベース処理
        tick >= last_tick + self.config.process_interval_ticks
    }

    /// Action 候補を取得（成功済みアクションを除外）
    fn build_candidates(&self, context: &TaskContext) -> Vec<String> {
        let all_actions = context
            .available_actions
            .as_ref()
            .map(|cfg| cfg.all_action_names())
            .unwrap_or_else(|| vec!["Continue".to_string()]);

        // excluded_actions からアクション名を抽出（"Grep(auth)" -> "Grep"）
        let excluded_names: std::collections::HashSet<String> = context
            .excluded_actions
            .iter()
            .filter_map(|s| s.split('(').next().map(|n| n.to_string()))
            .collect();

        // 成功済みアクションを候補から除外
        let filtered: Vec<String> = all_actions
            .into_iter()
            .filter(|name| !excluded_names.contains(name))
            .collect();

        // 全て除外された場合は Continue を返す
        if filtered.is_empty() {
            vec!["Continue".to_string()]
        } else {
            filtered
        }
    }

    /// DecisionResponse を Guidance に変換
    fn response_to_guidance(&self, response: &DecisionResponse) -> Guidance {
        // 信頼度が閾値以下の場合は Continue
        let action_name = if response.confidence < self.config.confidence_threshold {
            "Continue"
        } else {
            &response.tool
        };

        let action = Action {
            name: action_name.to_string(),
            params: ActionParams {
                target: if response.target.is_empty() {
                    None
                } else {
                    Some(response.target.clone())
                },
                args: response.args.clone(),
                data: Vec::new(),
            },
        };

        Guidance {
            actions: vec![action],
            content: response.reasoning.clone(),
            props: HashMap::new(),
            exploration_target: None,
            scope: WorkerScope::default(),
        }
    }

    /// デフォルトの Guidance を生成（Continue）
    fn default_guidance(&self) -> Guidance {
        Guidance {
            actions: vec![Action {
                name: "Continue".to_string(),
                params: ActionParams::default(),
            }],
            content: None,
            props: HashMap::new(),
            exploration_target: None,
            scope: WorkerScope::default(),
        }
    }
}

impl ManagerAgent for DefaultBatchManagerAgent {
    fn prepare(&self, context: &TaskContext) -> BatchDecisionRequest {
        // V2: v2_guidances がある場合は LLM 不要（Strategy が決定済み）
        if context.v2_guidances.is_some() {
            return BatchDecisionRequest {
                manager_id: self.id,
                requests: vec![],
            };
        }

        // 処理不要の場合は空のリクエストを返す
        if !self.should_process(context) {
            return BatchDecisionRequest {
                manager_id: self.id,
                requests: vec![],
            };
        }

        // ContextStore を構築（構造化データの唯一のソース）
        let store = self.build_context_store(context);

        // Worker IDリストを取得（完了済みWorkerを除外）
        let worker_ids: Vec<WorkerId> = context
            .worker_ids()
            .into_iter()
            .filter(|id| !context.done_workers.contains(id))
            .collect();

        // 全員完了済みなら空のリクエストを返す
        if worker_ids.is_empty() {
            return BatchDecisionRequest {
                manager_id: self.id,
                requests: vec![],
            };
        }

        // タスク目標を取得（query に入れる）
        let task_goal = context
            .get_str("task")
            .unwrap_or("Continue current work")
            .to_string();

        // 各 Worker への判断リクエストを生成
        let requests: Vec<WorkerDecisionRequest> = worker_ids
            .iter()
            .map(|&worker_id| {
                // ScopeStrategy を使って Scope を決定
                let scope = self
                    .config
                    .scope_strategy
                    .determine_scope(context, worker_id);

                // Scope に応じた ResolvedContext を取得
                // Note: candidates は build_candidates() で既に excluded_actions でフィルタ済み
                let mut resolved = ContextResolver::resolve_with_scope(&store, worker_id, &scope);

                // ManagerInstruction を構築
                let mut instruction = super::worker::ManagerInstruction::new();

                // 前回の Guidance があれば ManagerInstruction に埋め込む
                if let Some(prev_guidance) = context.previous_guidances.get(&worker_id) {
                    instruction = super::worker::ManagerInstruction::from_guidance(prev_guidance);
                }

                if instruction.has_content() {
                    resolved.manager_instruction = Some(instruction);
                }

                WorkerDecisionRequest {
                    worker_id,
                    query: task_goal.clone(),
                    context: resolved,
                    lora: None,
                }
            })
            .collect();

        BatchDecisionRequest {
            manager_id: self.id,
            requests,
        }
    }

    fn finalize(
        &self,
        context: &TaskContext,
        responses: Vec<(WorkerId, DecisionResponse)>,
    ) -> ManagementDecision {
        let tick = context.tick;

        // V2: v2_guidances がある場合はそのまま使用（LLM 不要）
        if let Some(ref v2_guidances) = context.v2_guidances {
            let worker_ids = context.worker_ids();
            let mut guidances = HashMap::new();

            for (i, worker_id) in worker_ids.iter().enumerate() {
                if context.done_workers.contains(worker_id) {
                    continue;
                }

                // V2 Guidance を取得（なければデフォルト）
                let mut guidance = v2_guidances
                    .get(i)
                    .cloned()
                    .unwrap_or_else(|| self.default_guidance());

                // ScopeStrategy で Scope を決定
                guidance.scope = self
                    .config
                    .scope_strategy
                    .determine_scope(context, *worker_id);

                guidances.insert(*worker_id, guidance);
            }

            return ManagementDecision {
                guidances,
                strategy_update: None,
                async_tasks: vec![],
            };
        }

        // レスポンスがない場合（処理スキップ）はデフォルト Continue
        if responses.is_empty() {
            let mut guidances = HashMap::new();
            for worker_id in context.worker_ids().iter() {
                let mut guidance = self.default_guidance();

                // ScopeStrategy を使って Scope を決定
                guidance.scope = self
                    .config
                    .scope_strategy
                    .determine_scope(context, *worker_id);

                guidances.insert(*worker_id, guidance);
            }

            return ManagementDecision {
                guidances,
                strategy_update: None,
                async_tasks: vec![],
            };
        }

        // 最後の処理 tick を更新
        self.last_process_tick.store(tick, Ordering::Relaxed);

        // DecisionResponse を Guidance に変換
        let mut guidances = HashMap::new();
        for (worker_id, response) in responses.iter() {
            let mut guidance = self.response_to_guidance(response);

            // ScopeStrategy を使って Scope を決定
            guidance.scope = self
                .config
                .scope_strategy
                .determine_scope(context, *worker_id);

            guidances.insert(*worker_id, guidance);
        }

        ManagementDecision {
            guidances,
            strategy_update: None,
            async_tasks: vec![],
        }
    }

    fn id(&self) -> ManagerId {
        self.id
    }

    fn name(&self) -> &str {
        &self.name
    }
}

// ============================================================================
// Builder
// ============================================================================

/// DefaultBatchManagerAgent Builder
pub struct DefaultBatchManagerAgentBuilder {
    id: ManagerId,
    name: Option<String>,
    config: DefaultManagerConfig,
}

impl DefaultBatchManagerAgentBuilder {
    pub fn new(id: ManagerId) -> Self {
        Self {
            id,
            name: None,
            config: DefaultManagerConfig::default(),
        }
    }

    pub fn name(mut self, name: impl Into<String>) -> Self {
        self.name = Some(name.into());
        self
    }

    pub fn config(mut self, config: DefaultManagerConfig) -> Self {
        self.config = config;
        self
    }

    pub fn interval(mut self, ticks: u64) -> Self {
        self.config.process_interval_ticks = ticks;
        self
    }

    pub fn immediate_on_escalation(mut self, enabled: bool) -> Self {
        self.config.immediate_on_escalation = enabled;
        self
    }

    pub fn confidence_threshold(mut self, threshold: f64) -> Self {
        self.config.confidence_threshold = threshold;
        self
    }

    pub fn build(self) -> DefaultBatchManagerAgent {
        let mut agent = DefaultBatchManagerAgent::new(self.id).with_config(self.config);

        if let Some(name) = self.name {
            agent = agent.with_name(name);
        }

        agent
    }
}

// ============================================================================
// Tests
// ============================================================================

#[cfg(test)]
mod tests {
    use super::*;
    use crate::context::WorkerSummary;

    fn sample_context() -> TaskContext {
        TaskContext::new(10)
            .with_worker(WorkerSummary::new(WorkerId(0)))
            .with_worker(WorkerSummary::new(WorkerId(1)).with_escalation(true))
            .with_success_rate(0.8)
            .with_progress(0.5)
    }

    #[test]
    fn test_default_manager_new() {
        let manager = DefaultBatchManagerAgent::new(ManagerId(0));
        assert_eq!(manager.id(), ManagerId(0));
        assert_eq!(manager.name(), "DefaultManager_0");
    }

    #[test]
    fn test_default_manager_with_name() {
        let manager = DefaultBatchManagerAgent::new(ManagerId(1)).with_name("TestManager");
        assert_eq!(manager.name(), "TestManager");
    }

    #[test]
    fn test_prepare_with_context() {
        let manager = DefaultBatchManagerAgent::new(ManagerId(0));
        let context = sample_context();
        let request = manager.prepare(&context);

        assert_eq!(request.manager_id, ManagerId(0));
        assert_eq!(request.requests.len(), 2); // 2 workers
    }

    #[test]
    fn test_finalize_empty_responses() {
        let manager = DefaultBatchManagerAgent::new(ManagerId(0));
        let context = sample_context();
        let decision = manager.finalize(&context, vec![]);

        // 空レスポンスの場合はデフォルト Continue
        assert_eq!(decision.guidances.len(), 2);
        for guidance in decision.guidances.values() {
            assert_eq!(guidance.actions.len(), 1);
            assert_eq!(guidance.actions[0].name, "Continue");
        }
    }

    #[test]
    fn test_response_to_guidance() {
        let manager = DefaultBatchManagerAgent::new(ManagerId(0));

        let response = DecisionResponse {
            tool: "Read".to_string(),
            target: "/path/to/file".to_string(),
            args: HashMap::new(),
            reasoning: Some("Need to read file".to_string()),
            confidence: 0.8,
            prompt: None,
            raw_response: None,
        };

        let guidance = manager.response_to_guidance(&response);
        assert_eq!(guidance.actions.len(), 1);
        assert_eq!(guidance.actions[0].name, "Read");
        assert_eq!(
            guidance.actions[0].params.target,
            Some("/path/to/file".to_string())
        );
    }

    #[test]
    fn test_low_confidence_falls_back_to_continue() {
        let manager = DefaultBatchManagerAgent::new(ManagerId(0));

        let response = DecisionResponse {
            tool: "Read".to_string(),
            target: "/path".to_string(),
            args: HashMap::new(),
            reasoning: None,
            confidence: 0.1, // 閾値(0.3)以下
            prompt: None,
            raw_response: None,
        };

        let guidance = manager.response_to_guidance(&response);
        assert_eq!(guidance.actions[0].name, "Continue");
    }

    #[test]
    fn test_builder() {
        let manager = DefaultBatchManagerAgentBuilder::new(ManagerId(2))
            .name("CustomManager")
            .interval(10)
            .confidence_threshold(0.5)
            .build();

        assert_eq!(manager.id(), ManagerId(2));
        assert_eq!(manager.name(), "CustomManager");
        assert_eq!(manager.config.process_interval_ticks, 10);
        assert!((manager.config.confidence_threshold - 0.5).abs() < 0.001);
    }
}