PokeApi.ts

import { Effect, Schema } from "effect";
import { BuildPokeApiUrl } from "./BuildPokeApiUrl";
import { FetchError, JsonError } from "./errors";
import { PokemonCollection } from "./PokemonCollection";
import { Pokemon } from "./schemas";

export class PokeApi extends Effect.Service<PokeApi>()("PokeApi", {
  dependencies: [PokemonCollection.Default, BuildPokeApiUrl.Default],
  effect: Effect.gen(function* () {
    const pokemonCollection = yield* PokemonCollection;
    const buildPokeApiUrl = yield* BuildPokeApiUrl;

    return {
      getPokemon: Effect.gen(function* () {
        const requestUrl = buildPokeApiUrl({ name: pokemonCollection[0] });

        const response = yield* Effect.tryPromise({
          try: () => fetch(requestUrl),
          catch: () => new FetchError(),
        });

        if (!response.ok) {
          return yield* new FetchError();
        }

        const json = yield* Effect.tryPromise({
          try: () => response.json(),
          catch: () => new JsonError(),
        });

        return yield* Schema.decodeUnknown(Pokemon)(json);
      }),
    };
  }),
}) {}