"""Chrysopedia API — Knowledge extraction and retrieval system.

Entry point for the FastAPI application. Configures middleware,
structured logging, and mounts versioned API routers.
"""

import logging
import sys
from contextlib import asynccontextmanager

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware

from config import get_settings
from routers import admin, auth, chat, consent, creator_chapters, creator_dashboard, creator_highlights, creators, health, highlights, ingest, pipeline, reports, search, stats, techniques, topics, videos


def _setup_logging() -> None:
    """Configure structured logging to stdout."""
    settings = get_settings()
    level = getattr(logging, settings.app_log_level.upper(), logging.INFO)

    handler = logging.StreamHandler(sys.stdout)
    handler.setFormatter(
        logging.Formatter(
            fmt="%(asctime)s | %(levelname)-8s | %(name)s | %(message)s",
            datefmt="%Y-%m-%dT%H:%M:%S",
        )
    )

    root = logging.getLogger()
    root.setLevel(level)
    # Avoid duplicate handlers on reload
    root.handlers.clear()
    root.addHandler(handler)

    # Quiet noisy libraries
    logging.getLogger("uvicorn.access").setLevel(logging.WARNING)
    logging.getLogger("sqlalchemy.engine").setLevel(logging.WARNING)


@asynccontextmanager
async def lifespan(app: FastAPI):  # noqa: ARG001
    """Application lifespan: setup on startup, teardown on shutdown."""
    _setup_logging()
    logger = logging.getLogger("chrysopedia")
    settings = get_settings()
    logger.info(
        "Chrysopedia API starting (env=%s, log_level=%s)",
        settings.app_env,
        settings.app_log_level,
    )
    yield
    logger.info("Chrysopedia API shutting down")


app = FastAPI(
    title="Chrysopedia API",
    description="Knowledge extraction and retrieval for music production content",
    version="0.1.0",
    lifespan=lifespan,
)

# ── Middleware ────────────────────────────────────────────────────────────────

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

# ── Routers ──────────────────────────────────────────────────────────────────

# Root-level health (no prefix)
app.include_router(health.router)

# Versioned API
app.include_router(admin.router, prefix="/api/v1")
app.include_router(auth.router, prefix="/api/v1")
app.include_router(chat.router, prefix="/api/v1")
app.include_router(consent.router, prefix="/api/v1")
app.include_router(creator_dashboard.router, prefix="/api/v1")
app.include_router(creator_chapters.router, prefix="/api/v1")
app.include_router(creator_highlights.router, prefix="/api/v1")
app.include_router(creators.router, prefix="/api/v1")
app.include_router(highlights.router, prefix="/api/v1")
app.include_router(ingest.router, prefix="/api/v1")
app.include_router(pipeline.router, prefix="/api/v1")
app.include_router(reports.router, prefix="/api/v1")
app.include_router(search.router, prefix="/api/v1")
app.include_router(stats.router, prefix="/api/v1")
app.include_router(techniques.router, prefix="/api/v1")
app.include_router(topics.router, prefix="/api/v1")
app.include_router(videos.router, prefix="/api/v1")


@app.get("/api/v1/health")
async def api_health():
    """Lightweight version-prefixed health endpoint (no DB check)."""
    return {"status": "ok", "version": "0.1.0"}