FromTodayPopupView.swift

// Kevin Li - 6:18 PM - 6/25/20

import SwiftUI

struct FromTodayPopupView: View {

    @ObservedObject var state: FromTodayPopupState

    var body: some View {
        fromTodayPopupView
            .scaleEffect(state.showFromTodayPopup ? 1 : 0)
            .opacity(state.showFromTodayPopup ? 1 : 0)
    }

    private var fromTodayPopupView: some View {
        let weeksToToday = state.weeksFromCurrentMonthToToday

        let unitsFromToday: String
        if weeksToToday < 8 {
            unitsFromToday = "\(weeksToToday) \(weeksToToday != 1 ? "WEEKS" : "WEEK")"
        } else {
            unitsFromToday = "\(weeksToToday/4) MONTHS"
        }

        return VStack {
            unitsFromTodayText(unitsFromToday)
            unitsDescriptionText
        }
        .transition(.identity)
        .id("FromTodayPopup\(weeksToToday)")
    }

    private func unitsFromTodayText(_ text: String) -> some View {
        Text(text)
            .font(.headline)
            .fontWeight(.semibold)
            .tracking(2.5)
    }

    private var unitsDescriptionText: some View {
        Text("AGO")
            .font(.system(size: 10))
    }

}