// The Swift Programming Language
// https://docs.swift.org/swift-book

import Adwaita
import CMath

@main
struct PMCalc: App {
    let app = AdwaitaApp(id: "me.thealgorithm476.PMCalc.PMCalc")
    @State
    var vm = ViewModel()

    var scene: Scene {
        Window(id: "main") { window in
            VStack(spacing: 8) {
                Text(vm.display)
                    .selectable(false)
                    .title2()
                    .halign(.end)
                VStack(spacing: 8) {
                    HStack(spacing: 8) {
                        Button("AC") {
                            vm.clear()
                        }
                            .keyboardShortcut("c", app: app)
                            .hexpand()
                            .destructive()
                        Button("^") {
                            vm.operation(.pow)
                        }
                            .hexpand()
                        Button("%") {}
                            .keyboardShortcut("percent", app: app)
                            .hexpand()
                        Button("/") {
                            vm.operation(.div)
                        }
                            .keyboardShortcut("slash", app: app)
                            .hexpand()
                    }
                    .vexpand()
                    HStack(spacing: 8) {
                        Button("7") {
                            vm.addNumber(7)
                        }
                            .keyboardShortcut("7", app: app)
                            .hexpand()
                        Button("8") {
                            vm.addNumber(8)
                        }
                            .keyboardShortcut("8", app: app)
                            .hexpand()
                        Button("9") {
                            vm.addNumber(9)
                        }
                            .keyboardShortcut("9", app: app)
                            .hexpand()
                        Button("*") {
                            vm.operation(.mul)
                        }
                            .keyboardShortcut("asterisk", app: app)
                            .hexpand()
                    }
                    .vexpand()
                    HStack(spacing: 8) {
                        Button("4") {
                            vm.addNumber(4)
                        }
                            .keyboardShortcut("4", app: app)
                            .hexpand()
                        Button("5") {
                            vm.addNumber(5)
                        }
                            .keyboardShortcut("5", app: app)
                            .hexpand()
                        Button("6") {
                            vm.addNumber(6)
                        }
                            .keyboardShortcut("6", app: app)
                            .hexpand()
                        Button("-") {
                            vm.operation(.sub)
                        }
                            .keyboardShortcut("minus", app: app)
                            .hexpand()
                    }
                    .vexpand()
                    HStack(spacing: 8) {
                        Button("1") {
                            vm.addNumber(1)
                        }
                            .keyboardShortcut("1", app: app)
                            .hexpand()
                        Button("2") {
                            vm.addNumber(2)
                        }
                            .keyboardShortcut("2", app: app)
                            .hexpand()
                        Button("3") {
                            vm.addNumber(3)
                        }
                            .keyboardShortcut("3", app: app)
                            .hexpand()
                        Button("+") {
                            vm.operation(.add)
                        }
                            .keyboardShortcut("plus", app: app)
                            .hexpand()
                    }
                    .vexpand()
                    HStack(spacing: 8) {
                        Button("0") {
                            vm.addNumber(0)
                        }
                            .keyboardShortcut("0", app: app)
                            .hexpand()
                        Button("sq") {
                            vm.operation(.sqrt)
                        }
                            .hexpand()
                        Button(",") {
                            vm.addComma()
                        }
                            .keyboardShortcut("comma", app: app)
                            .hexpand()
                        Button("=") {
                            vm.calculate()
                        }
                            .keyboardShortcut("equal", app: app)
                            .hexpand()
                    }
                    .vexpand()
                }
            }
            .padding()
            .topToolbar {
                ToolbarView(app: app, window: window)
            }
        }
    }

}