"""Event management endpoints"""

from fastapi import APIRouter, HTTPException, Query, Path
from typing import List, Optional, Dict
from datetime import datetime
import uuid

router = APIRouter()

# In-memory storage (replace with database)
events_db = {}
events_list = []

@router.get("/", response_model=List[Dict])
async def get_events(
    active_only: bool = Query(False, description="Return only active events"),
    limit: int = Query(10, ge=1, le=100, description="Number of events to return"),
    offset: int = Query(0, ge=0, description="Offset for pagination")
):
    """Get list of tsunami events"""
    events = [e for e in events_list if not active_only or e.get('active', False)]
    return events[offset:offset + limit]

@router.get("/active", response_model=List[Dict])
async def get_active_events():
    """Get currently active tsunami events"""
    return [e for e in events_list if e.get('active', False)]

@router.get("/{event_id}", response_model=Dict)
async def get_event(
    event_id: str = Path(..., description="Event ID")
):
    """Get event details by ID"""
    if event_id not in events_db:
        raise HTTPException(status_code=404, detail="Event not found")
    return events_db[event_id]

@router.post("/", response_model=Dict, status_code=201)
async def create_event(event_data: Dict):
    """Create new tsunami event"""
    event_id = str(uuid.uuid4())
    event = {
        "id": event_id,
        "created_at": datetime.utcnow().isoformat(),
        "updated_at": datetime.utcnow().isoformat(),
        "active": True,
        **event_data
    }
    events_db[event_id] = event
    events_list.append(event)
    return event

@router.put("/{event_id}", response_model=Dict)
async def update_event(
    event_id: str = Path(...),
    event_data: Dict = None
):
    """Update event details"""
    if event_id not in events_db:
        raise HTTPException(status_code=404, detail="Event not found")
    
    events_db[event_id].update(event_data)
    events_db[event_id]["updated_at"] = datetime.utcnow().isoformat()
    return events_db[event_id]

@router.delete("/{event_id}", status_code=204)
async def delete_event(
    event_id: str = Path(...)
):
    """Delete event"""
    if event_id not in events_db:
        raise HTTPException(status_code=404, detail="Event not found")
    
    del events_db[event_id]
    global events_list
    events_list = [e for e in events_list if e.get('id') != event_id]

@router.get("/{event_id}/chi", response_model=Dict)
async def get_event_chi(
    event_id: str = Path(...),
    window: Optional[int] = Query(None, description="Time window in minutes")
):
    """Get CHI time series for event"""
    if event_id not in events_db:
        raise HTTPException(status_code=404, detail="Event not found")
    
    # Placeholder for CHI data
    return {
        "event_id": event_id,
        "chi_series": [
            {"timestamp": "2026-02-17T10:00:00Z", "value": 0.21},
            {"timestamp": "2026-02-17T10:05:00Z", "value": 0.38},
            {"timestamp": "2026-02-17T10:10:00Z", "value": 0.54},
            {"timestamp": "2026-02-17T10:15:00Z", "value": 0.71},
            {"timestamp": "2026-02-17T10:20:00Z", "value": 0.82},
            {"timestamp": "2026-02-17T10:25:00Z", "value": 0.91},
        ]
    }

@router.get("/{event_id}/parameters", response_model=Dict)
async def get_event_parameters(
    event_id: str = Path(...),
    latest_only: bool = Query(True, description="Return only latest values")
):
    """Get seven parameters for event"""
    if event_id not in events_db:
        raise HTTPException(status_code=404, detail="Event not found")
    
    # Placeholder for parameter data
    return {
        "event_id": event_id,
        "timestamp": datetime.utcnow().isoformat(),
        "parameters": {
            "wcc": {"value": 1.31, "status": "MONITOR"},
            "kpr": {"value": 1.44, "status": "MONITOR"},
            "hfsi": {"value": 0.63, "status": "ALERT"},
            "becf": {"value": 4.80, "status": "ALERT"},
            "sdb": {"value": 1.20, "status": "MODERATE"},
            "sbsp": {"value": 0.67, "status": "ALERT"},
            "smvi": {"value": 0.29, "status": "MONITOR"}
        }
    }

@router.post("/{event_id}/simulate", response_model=Dict)
async def simulate_event(
    event_id: str = Path(...),
    duration: int = Query(3600, description="Simulation duration in seconds")
):
    """Run NSWE simulation for event"""
    if event_id not in events_db:
        raise HTTPException(status_code=404, detail="Event not found")
    
    return {
        "event_id": event_id,
        "simulation_id": str(uuid.uuid4()),
        "duration_seconds": duration,
        "status": "started",
        "estimated_completion": datetime.utcnow().isoformat()
    }