import { Todo } from "@todo-tests/common/data"
import { Array, Context, Effect, Option, Ref, SubscriptionRef } from "effect"


export class TodoRepository extends Context.Tag("TodoRepository")<TodoRepository, Ref.Ref<Todo[]>>() {}

export class TodoRepositoryService {
    constructor(
        readonly ref: SubscriptionRef.SubscriptionRef<(Todo & { id: Option.Some<string> })[]>
    ) {}

    get(id: string) {
        return this.ref.get.pipe(
            Effect.map(Array.findFirst(todo => todo.id.value === id))
        )
    }
    getIndex(id: string) {
        return this.ref.get.pipe(
            Effect.map(Array.findFirstIndex(todo => todo.id.value === id))
        )
    }

    add(todo: Todo & { id: Option.None<string> }) {
        return Ref.update(this.ref, todos =>
            Array.append(todos, new Todo({
                ...todo,
                id: Option.some(""),
            }))
        )
    }

    update(todo: Todo & { id: Option.Some<string> }) {
        return Effect.gen(this, function*() {
            const index = yield* yield* this.getIndex(todo.id.value)
            yield* Ref.update(this.ref, Array.replace(index, todo))
        })
    }
}


export const createDefaultTodos = TodoRepository.pipe(Effect.flatMap(repo =>
    Ref.update(repo, todos =>
        Array.appendAll(todos, [
            new Todo({
                id: Option.some("1"),
                title: "A test todo",
                content: "Lorem ipsum",
                due: Option.none(),
                completed: false,
                createdAt: new Date(),
                updatedAt: new Date(),
            })
        ])
    )
))