import ActivityKit
import Charts
import SwiftUI
import WidgetKit

struct LiveActivity: Widget {
    let dateFormatter: DateFormatter = {
        var f = DateFormatter()
        f.dateStyle = .none
        f.timeStyle = .short
        return f
    }()

    func changeLabel(context: ActivityViewContext<LiveActivityAttributes>) -> Text {
        if !context.isStale && !context.state.change.isEmpty {
            Text(context.state.change)
        } else {
            Text("--")
        }
    }

    func updatedLabel(context: ActivityViewContext<LiveActivityAttributes>) -> Text {
        Text("Updated: \(dateFormatter.string(from: context.state.date))")
    }

    func bgLabel(context: ActivityViewContext<LiveActivityAttributes>) -> Text {
        if context.isStale {
            Text("--")
        } else {
            Text(context.state.bg).fontWeight(.bold)
        }
    }

    @ViewBuilder func trend(context: ActivityViewContext<LiveActivityAttributes>) -> some View {
        if context.isStale {
            Text("--")
        } else {
            if let trendSystemImage = context.state.trendSystemImage {
                Image(systemName: trendSystemImage)
            }
        }
    }

    @ViewBuilder func bgAndTrend(context: ActivityViewContext<LiveActivityAttributes>) -> some View {
        if context.isStale {
            Text("--")
        } else {
            HStack {
                Text(context.state.bg).fontWeight(.bold)
                if let trendSystemImage = context.state.trendSystemImage {
                    Image(systemName: trendSystemImage)
                }
            }
        }
    }

    @ViewBuilder func bobble(context: ActivityViewContext<LiveActivityAttributes>) -> some View {
        @State var angularGradient = AngularGradient(colors: [
            Color(red: 0.7215686275, green: 0.3411764706, blue: 1),
            Color(red: 0.6235294118, green: 0.4235294118, blue: 0.9803921569),
            Color(red: 0.4862745098, green: 0.5450980392, blue: 0.9529411765),
            Color(red: 0.3411764706, green: 0.6666666667, blue: 0.9254901961),
            Color(red: 0.262745098, green: 0.7333333333, blue: 0.9137254902),
            Color(red: 0.7215686275, green: 0.3411764706, blue: 1)
        ], center: .center, startAngle: .degrees(270), endAngle: .degrees(-90))
        let triangleColor = Color(red: 0.262745098, green: 0.7333333333, blue: 0.9137254902)

        WidgetBobble(gradient: angularGradient, color: triangleColor)
            .rotationEffect(.degrees(context.state.rotationDegrees))
    }

    @ViewBuilder func chart(context: ActivityViewContext<LiveActivityAttributes>) -> some View {
        if context.isStale {
            Text("No data available")
        } else {
            Chart {
                ForEach(context.state.chart.indices, id: \.self) { index in
                    LineMark(
                        x: .value("Time", context.state.chartDate[index] ?? Date()),
                        y: .value("Value", context.state.chart[index])
                    ).foregroundStyle(Color.green.gradient).symbolSize(12)
                }
            }.chartPlotStyle { plotContent in
                plotContent.background(.cyan.opacity(0.1))
            }
            .chartYAxis {
                AxisMarks(position: .leading)
            }
        }
    }

    var body: some WidgetConfiguration {
        ActivityConfiguration(for: LiveActivityAttributes.self) { context in
            // Lock screen/banner UI goes here

            HStack(spacing: 2) {
                VStack {
                    chart(context: context).frame(width: UIScreen.main.bounds.width / 1.8)
                }.padding(.vertical, 5).padding(.horizontal, 15)
                Divider().foregroundStyle(Color.white)
                VStack {
                    ZStack {
                        bobble(context: context)
                            .scaleEffect(0.6)
                            .clipped()
                        VStack {
//                            bgAndTrend(context: context).imageScale(.small).font(.title2)
                            bgLabel(context: context).font(.title2).imageScale(.small)
                            changeLabel(context: context).font(.callout)
                        }
                    }.padding(.trailing, 10).padding(.top, 5)
                    updatedLabel(context: context).font(.caption).padding(.bottom).padding(.trailing, 5)
                }
            }
            .privacySensitive()
            .imageScale(.small)
            .padding(.all, 15)
            .background(Color.white.opacity(0.2))
            .foregroundColor(Color.white)
            .activityBackgroundTint(Color.black.opacity(0.7))
            .activitySystemActionForegroundColor(Color.black)

        } dynamicIsland: { context in
            DynamicIsland {
                // Expanded UI goes here.  Compose the expanded UI through
                // various regions, like leading/trailing/center/bottom
                DynamicIslandExpandedRegion(.leading) {
                    HStack(spacing: 3) {
                        bgAndTrend(context: context)
                    }.imageScale(.small).font(.title).padding(.leading, 5)
                }
                DynamicIslandExpandedRegion(.trailing) {
                    changeLabel(context: context).font(.title).padding(.trailing, 5)
                }
                DynamicIslandExpandedRegion(.bottom) {
                    chart(context: context)
                }
                DynamicIslandExpandedRegion(.center) {
                    updatedLabel(context: context).font(.caption).foregroundStyle(Color.secondary)
                }
            } compactLeading: {
                HStack(spacing: 1) {
                    bgAndTrend(context: context)
                }.bold().imageScale(.small).padding(.leading, 5)
            } compactTrailing: {
                changeLabel(context: context).padding(.trailing, 5)
            } minimal: {
                bgLabel(context: context).bold()
            }
            .widgetURL(URL(string: "freeaps-x://"))
            .keylineTint(Color.cyan.opacity(0.5))
        }
    }
}

// private extension LiveActivityAttributes {
//    static var preview: LiveActivityAttributes {
//        LiveActivityAttributes(startDate: Date())
//    }
// }
//
// private extension LiveActivityAttributes.ContentState {
//    static var test: LiveActivityAttributes.ContentState {
//        LiveActivityAttributes.ContentState(bg: "100", trendSystemImage: "arrow.right", change: "+2", date: Date())
//    }
// }
//
// #Preview("Notification", as: .content, using: LiveActivityAttributes.preview) {
//    LiveActivity()
// } contentStates: {
//    LiveActivityAttributes.ContentState.test
// }