api.py

import uvicorn
from fastapi import FastAPI

from common import (
    install_requests_cache,
    prepare,
    find_paths_for_fiat,
    prepare_conversion_paths,
)

app = FastAPI()
install_requests_cache()


@app.get("/")
async def root():
    return {"message": "Hello World"}


# TODO: rename max_length to 'hops'
@app.get("/best-rates/{currency_from}-{currency_to}")
async def best_path_cli(
    currency_from: str, currency_to: str, hops: int = 4, amount: float = 1
):
    """Return best conversion paths."""
    graph = prepare()
    hops = min(hops, 4)
    paths = find_paths_for_fiat(currency_from, currency_to, graph, hops)
    print(f"Found {len(paths)} paths to convert (Displaying top 10)")
    conversion_paths = prepare_conversion_paths(paths, amount)
    return conversion_paths[:10]


if __name__ == "__main__":
    uvicorn.run(app)