export class LocationsDataStore {
	constructor() {
		this.data = {};
		this.read();
	}

	read() {
		this.data = DataStore.get("locations") || {};
	}

	write() {
		DataStore.set("locations", this.data);
	}

	rememberAll(location_list) {
		for (let location of location_list) {
			this.data[location.id] = location;
		}

		this.write();
	}

	rememberAllIfNotExist(location_list) {
		for (let location of location_list) {
			if (!(location.id in this.data)) {
				this.data[location.id] = location;
			}
		}

		this.write();
	}
}

export class RecentLocationsDataStore {
	constructor() {
		this.data = [];
		this.read();
	}

	read() {
		this.data = DataStore.get("recent-locations") || [];
	}

	write() {
		DataStore.set("recent-locations", this.data);
	}

	remember(location_id) {
		this.data = this.data.filter((item) => {
			return item != location_id;
		});
		this.data.push(location_id);

		this.write();
	}
}

export class TrackedTripsDataStore {
	constructor() {
		this.data = [];
		this.read();
	}

	read() {
		this.data = DataStore.get("tracked-trips") || [];
	}

	write() {
		DataStore.set("tracked-trips", this.data);
	}

	remember(trip_id, origin_id, destination_id) {
		this.data.push({
			trip: trip_id,
			origin: origin_id,
			destination: destination_id,
		});

		this.write();
	}
}

export class TripsDataStore {
	constructor() {
		this.data = {};
		this.read();
	}

	read() {
		this.data = DataStore.get("trips") || {};
	}

	write() {
		DataStore.set("trips", this.data);
	}

	remember(trip) {
		this.rememberAll([trip]);
	}

	rememberAll(trip_list) {
		for (let trip of trip_list) {
			this.data[trip.id] = trip;
		}

		this.write();
	}
}

export class DataStore {
	static get(key) {
		return JSON.parse(window.localStorage.getItem(key));
	}

	static set(key, value) {
		window.localStorage.setItem(key, JSON.stringify(value));
	}

	constructor() {
		this.locations = new LocationsDataStore();
		this.recent_locations = new RecentLocationsDataStore();
		this.tracked_trips = new TrackedTripsDataStore();
		this.trips = new TripsDataStore();
	}
}