from fastapi import APIRouter, Depends
from .auth_guard import require_role, AuthRole
from pydantic import BaseModel
from typing import List, Dict, Optional, Any
import time

router = APIRouter(prefix="/api/marketplace", tags=["marketplace"], dependencies=[Depends(require_role(AuthRole.MACHINE))])

class WorkerCapability(BaseModel):
    id: str
    name: str
    version: str = "1.0.0"
    description: Optional[str] = None
    status: str = "online"
    last_seen: int = 0
    # SLA & Metrics
    cost: float = 0.0          # Costo per operazione o unitario
    latency: float = 0.0       # Latenza media in ms
    region: str = "global"     # Regione geografica
    gpu: bool = False          # Disponibilità GPU
    priority: int = 10         # Priorità (più basso = più prioritario)
    # Lista di capacità supportate (es. ["browser", "shell", "vision"])
    capabilities: List[str] = []
    metadata: Dict[str, Any] = {}

WORKERS_REGISTRY: Dict[str, WorkerCapability] = {}

@router.get("/workers", response_model=List[WorkerCapability])
async def list_workers():
    return list(WORKERS_REGISTRY.values())

@router.post("/register")
async def register_worker(worker: WorkerCapability):
    worker.last_seen = int(time.time())
    WORKERS_REGISTRY[worker.id] = worker
    return {"status": "registered", "id": worker.id, "capabilities": worker.capabilities}

@router.get("/capabilities")
async def get_all_capabilities():
    """Ritorna l'elenco consolidato delle capacità disponibili da tutti i worker attivi."""
    caps = {}
    now = int(time.time())
    for w in WORKERS_REGISTRY.values():
        if now - w.last_seen < 300: # Worker attivo negli ultimi 5 minuti
            for cap in w.capabilities:
                if cap not in caps:
                    caps[cap] = []
                caps[cap].append({
                    "worker_id": w.id,
                    "version": w.version,
                    "cost": w.cost,
                    "latency": w.latency,
                    "region": w.region
                })
    return caps

@router.post("/resolve")
async def resolve_capability(capability: str, constraints: Optional[Dict[str, Any]] = None):
    """
    ARCH-E3.2: Capability Resolver
    Endpoint per risolvere una capability in un Worker specifico.
    """
    from .resolver import resolver, ResolverConstraints
    c = ResolverConstraints(**constraints) if constraints else None
    worker = await resolver.resolve(capability, c)
    if not worker:
        return {"status": "error", "message": f"No worker found for capability: {capability}"}
    return {"status": "resolved", "worker": worker}