from __future__ import annotations

import os
from pathlib import Path

from fastapi import FastAPI, Request
from fastapi.responses import FileResponse, JSONResponse

from . import auth, catalog, ledger, registry


def create_app() -> FastAPI:
    app = FastAPI(title="m2-market-web")
    app.include_router(auth.router, prefix="/api")
    app.include_router(catalog.router, prefix="/api")
    app.include_router(ledger.router, prefix="/api")
    app.include_router(registry.router, prefix="/api")

    @app.get("/health")
    def health() -> dict[str, str]:
        return {"status": "healthy"}

    # In the container the package is pip-installed (site-packages), so the
    # repo-relative parents[3] fallback misses — M2MW_STATIC_DIR wins.
    dist = Path(
        os.environ.get(
            "M2MW_STATIC_DIR",
            Path(__file__).resolve().parents[3] / "frontend" / "dist",
        )
    )

    @app.get("/{path:path}", include_in_schema=False)
    def static_or_spa(path: str, request: Request):
        if request.url.path.startswith("/api/"):
            return JSONResponse(status_code=404, content={"error": "not_found"})
        if not dist.exists():
            return JSONResponse(status_code=404, content={"error": "frontend_not_built"})
        requested = (dist / path).resolve()
        if requested.is_file() and dist.resolve() in requested.parents:
            return FileResponse(requested)
        index = dist / "index.html"
        if index.is_file():
            return FileResponse(index)
        return JSONResponse(status_code=404, content={"error": "frontend_not_built"})

    return app


app = create_app()