import { defaultGame } from "../prefabs/game";
import { Game, SerializedGame, SerializedNodeBehaviour } from "../types";
import { Behaviour, behaviours, Converter } from "./functions";

export function serializeBehaviour(behaviour: Behaviour): SerializedNodeBehaviour {
    switch (behaviour.kind) {
        case 'converter': {
            const converter = behaviour as Converter;
            return {
                id: converter.id,
                kind: 'converter',
                inputs: {
                    pins: converter.inputs.pins.map((pin) => ({
                        ...pin,
                        rate: converter.inputRates[pin.resource] ?? 0,
                    })),
                },
                outputs: {
                    pins: converter.outputs.pins.map((pin) => ({
                        ...pin,
                        rate: converter.outputRates[pin.resource] ?? 0,
                    })),
                },
            };
        }
        default:
            throw new Error('Unknown behaviour');
    }
}

export function deserializeBehaviour(value: SerializedNodeBehaviour): Behaviour {
    switch (value.kind) {
        case 'converter':
            return new (behaviours.converter)(value);
        default:
            throw new Error('Unknown behaviour');
    }
}

export function serialize(game: Game): SerializedGame {
    return {
        time: game.time,
        nodes: game.nodes.map((node) => ({
            id: node.id,
            name: node.name,
            behaviour: serializeBehaviour(node.behaviour),
        })),
    };
}

export function deserialize(value: SerializedGame): Game {
    return new Game(value);
}

export function serializeToString(game: Game): string {
    return JSON.stringify(serialize(game));
}

export function deserializeFromString(value: string): Game {
    return deserialize(JSON.parse(value));
}

const KEY_GAME = 'incgane';

export function save(game: Game) {
    localStorage.setItem(KEY_GAME, serializeToString(game));
}

export function load(): Game {
    try {
        const raw = localStorage.getItem(KEY_GAME);
        if (raw)
            return deserializeFromString(raw);
    } catch (e) {
        console.warn('Не удалось прочитать игру из localStorage', e);
    }
    const fresh = deserialize(defaultGame());
    save(fresh);
    return fresh;
}