// FuelBoardLiveActivity.swift — Live Activity shared model.
//
// Compiled into BOTH the app target (to start/update/end the activity) and
// the widget extension (to render it). ActivityKit is iOS-only, so this file
// is deliberately NOT symlinked into FuelBoardTests/Sources — the SPM test
// target runs on macOS where ActivityKit does not exist.
//
// The activity mirrors the app's TOP badge: the cheapest station selling the
// app's selected fuel within the app's chosen distance radius. Tapping the
// activity opens Apple Maps driving directions to that station (maps://).

import ActivityKit
import Foundation

/// Attributes are fixed at request time. Here they pin the FUEL being
/// tracked; everything that can change while driving (station, price,
/// distance) lives in ContentState so updates don't need a new activity.
struct FuelBoardLiveActivityAttributes: ActivityAttributes {
    var fuel: FuelType

    public struct ContentState: Codable, Hashable {
        var stationID: String
        var stationName: String
        var brand: String
        /// Price in pence per litre (same unit as `FuelStation.prices`).
        var pricePence: Double
        var distanceKM: Double
        var lat: Double
        var lng: Double
        var updatedAt: Date
    }
}