//
//  RootFeature.swift
//  Root
//

import Foundation
import Facts
import CatFactsKit
import ComposableArchitecture

/// Handles interaction logic for the root of the application. Doesn't otherwise do much itself but it does respond to
/// a `viewAppeared` action so that it can show how one might change the state that drives _another_ feature (in this
/// example, `FactsFeature`).
@Reducer
public struct RootFeature {
    @ObservableState
    public struct State {
        var facts: FactsFeature.State = .init(baseURL: URL(string: "https://invalid.barf")!)
        public var baseURL: URL?

        public init() { }
    }

    public enum Action {
        case viewAppeared
        case facts(FactsFeature.Action)
    }

    public init() { }
    
    public var body: some ReducerOf<Self> {
        // This fun DSL lets me provide a concrete Feature reducer when the Root feature is asked for a scoped store
        Scope(state: \.facts, action: \.facts) {
            FactsFeature()
        }
        // And then this is everything that's provided by the root.
        Reduce { state, action in
            switch action {
            case .viewAppeared:
                state.facts = .init(baseURL: URL(string: "https://meowfacts.herokuapp.com/")!)
                return .none
            case .facts:
                return .none
            }
        }
    }
}