import argparse

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

from src.routes.projects import router as project_router
from src.routes.tags import router as tag_router
from src.routes.records import router as record_router


description = """
Welcome to the Juggl API.
    
This API allows you to retrieve your timetracking data.
"""

app = FastAPI(
    title="Juggl API",
    description=description,
    contact={  # Contact information. See  https://fastapi.tiangolo.com/tutorial/metadata/
        "name": "Juggl Management",
        "url": "https://juggl.giller.dev/contact",
        "email": "help@juggl.giller.dev",
    },
    docs_url="/"  # Documentation on start page
)
"""The main FastAPI instance"""

# Enable CORS to allow requests from other domains/origins.
# See https://en.wikipedia.org/wiki/Cross-origin_resource_sharing
app.add_middleware(
    CORSMiddleware,
    allow_origins=[
        # Allow **all** foreign requests to access this API.
        '*'
    ],
    allow_methods=["*"],
    allow_headers=["*"],
)

# Add subroutes
app.include_router(project_router)
app.include_router(tag_router)
app.include_router(record_router)


def main():
    args = parse_args()
    if args.dev:
        start_dev_server(args.port)
    else:
        start_production_server(args.port)


def parse_args() -> argparse.Namespace:
    """Parses command line arguments on application startup."""

    parser = argparse.ArgumentParser(
        description="Juggl Backend v2",
        formatter_class=argparse.ArgumentDefaultsHelpFormatter  # show default values
    )
    parser.add_argument("--dev", default=False, action=argparse.BooleanOptionalAction,
                        help="Start a dev server with auto-reloading")
    parser.add_argument("--port", type=int, default=8192, help="Port on which the API should run")
    return parser.parse_args()


def start_dev_server(port: int):
    """Starts a development server with auto-reloading on port."""

    # Host="0.0.0.0" makes the application accessible from other IPs. Necessary when running inside docker
    uvicorn.run("src.main:app", reload=True, port=port, host="0.0.0.0")


def start_production_server(port: int):
    """Starts a production, i.e. performance-optimized server on port."""

    # Host="0.0.0.0" makes the application accessible from other IPs. Necessary when running inside docker
    uvicorn.run("src.main:app", port=port, host="0.0.0.0")


if __name__ == "__main__":
    main()