"""Metrics route — /api/v1/metrics"""

from fastapi import APIRouter, Request

router = APIRouter(tags=["metrics"])


@router.get("/metrics")
async def get_metrics(request: Request):
    """Get application metrics"""
    app = request.app

    # Task metrics from TaskStore
    task_store = getattr(app.state, "task_store", None)
    task_metrics = {
        "total_tasks": 0,
        "completed_tasks": 0,
        "failed_tasks": 0,
        "pending_tasks": 0,
    }
    if task_store:
        try:
            all_tasks = task_store.list_tasks(limit=10000)
            task_metrics["total_tasks"] = len(all_tasks)
            task_metrics["completed_tasks"] = len(
                [t for t in all_tasks if t.status.value == "completed"]
            )
            task_metrics["failed_tasks"] = len(
                [t for t in all_tasks if t.status.value == "failed"]
            )
            task_metrics["pending_tasks"] = len(
                [t for t in all_tasks if t.status.value == "pending"]
            )
        except Exception:
            pass

    # Agent pool metrics
    agent_pool = getattr(app.state, "agent_pool", None)
    agent_metrics: dict = {
        "total_agents": 0,
        "agent_names": [],
    }
    if agent_pool:
        try:
            agents = agent_pool.list_agents()
            agent_metrics["total_agents"] = len(agents)
            agent_metrics["agent_names"] = [a.get("name", "") for a in agents]
        except Exception:
            pass

    # Skill registry metrics
    skill_registry = getattr(app.state, "skill_registry", None)
    skill_metrics: dict = {
        "total_skills": 0,
        "skill_names": [],
    }
    if skill_registry:
        try:
            skills = skill_registry.list_skills()
            skill_metrics["total_skills"] = len(skills)
            skill_metrics["skill_names"] = [s.name for s in skills]
        except Exception:
            pass

    return {
        "tasks": task_metrics,
        "agents": agent_metrics,
        "skills": skill_metrics,
        "version": "2.0.0",
    }