import time
from fastapi import FastAPI, Request
from fastapi.middleware.cors import CORSMiddleware
from app.routers import apm, readiness, supply_chain, upload, dashboard
from app.routers.activity import router as activity_router
from app.database import init_db, log_activity

# ── Init DB on startup ──────────────────────────────────────────────
init_db()

app = FastAPI(
    title="EVolve Intelligence",
    description="AI platform for industrial EV asset performance and supply chain intelligence.",
    version="1.0.0"
)

import os
ALLOWED_ORIGINS = os.environ.get("ALLOWED_ORIGINS", "*").split(",")

app.add_middleware(
    CORSMiddleware,
    allow_origins=ALLOWED_ORIGINS,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# ── Request-level activity logging middleware ───────────────────────
# Logs every API call (except static/docs endpoints) to the DB
SKIP_LOG_PREFIXES = ("/docs", "/openapi", "/redoc", "/favicon")

@app.middleware("http")
async def activity_logging_middleware(request: Request, call_next):
    path = request.url.path
    method = request.method

    # Skip noisy internal endpoints
    if any(path.startswith(p) for p in SKIP_LOG_PREFIXES):
        return await call_next(request)

    start = time.time()
    response = await call_next(request)
    duration_ms = round((time.time() - start) * 1000)

    # Only log meaningful read/write calls, not health checks
    if path not in ("/", "/health"):
        action = f"{method} {path} — {response.status_code} ({duration_ms}ms)"
        log_activity(
            action=action,
            endpoint=path,
            method=method,
            status_code=response.status_code,
            details={"duration_ms": duration_ms}
        )

    return response

# ── Routers ─────────────────────────────────────────────────────────
app.include_router(apm.router)
app.include_router(readiness.router)
app.include_router(supply_chain.router)
app.include_router(upload.router)
app.include_router(dashboard.router)
app.include_router(activity_router)

@app.get("/")
def root():
    return {
        "service": "EVolve Intelligence",
        "modules": ["APM", "Fleet Readiness", "Supply Chain Risk"],
        "docs": "/docs"
    }

@app.get("/health")
def health():
    return {"status": "ok"}