Donut Chart

// Donut Chart · syxUI · https://syxui.dev/components/chart-donut
// Free in any project. Keep this line and credit syxUI where a person can read it.

import SwiftUI

extension View {
    func formaCard(_ pad: CGFloat = 18) -> some View {
        self.padding(pad)
            .background(Color(.systemBackground), in: RoundedRectangle(cornerRadius: 20, style: .continuous))
            .overlay(RoundedRectangle(cornerRadius: 20, style: .continuous).stroke(Color.primary.opacity(0.06), lineWidth: 1))
            .shadow(color: .black.opacity(0.05), radius: 14, x: 0, y: 6)
    }
}

struct CardHeader: View {
    let label: String; let value: String; var trend: String? = nil
    var body: some View {
        HStack(alignment: .firstTextBaseline) {
            VStack(alignment: .leading, spacing: 3) {
                Text(label).font(.system(size: 13, weight: .medium)).foregroundStyle(.secondary)
                Text(value).font(.system(size: 26, weight: .bold))
            }
            Spacer()
            if let trend {
                Text(trend).font(.system(size: 12, weight: .semibold))
                    .padding(.horizontal, 8).padding(.vertical, 3)
                    .background(Color.primary.opacity(0.06), in: Capsule())
            }
        }
    }
}
// 5. Donut chart
struct DonutChartCard: View {
    let segs: [Double] = [0.45, 0.28, 0.17, 0.10]
    var body: some View {
        HStack(spacing: 18) {
            ZStack {
                ForEach(segs.indices, id: \.self) { i in
                    let start = segs[0..<i].reduce(0, +)
                    Circle().trim(from: start, to: start + segs[i] - 0.006)
                        .stroke(Color.primary.opacity(1 - Double(i) * 0.24), style: .init(lineWidth: 16, lineCap: .butt))
                        .rotationEffect(.degrees(-90))
                }
                VStack(spacing: 0) { Text("$4.2k").font(.system(size: 17, weight: .bold)); Text("spent").font(.system(size: 10)).foregroundStyle(.secondary) }
            }
            .frame(width: 108, height: 108)
            VStack(alignment: .leading, spacing: 8) {
                ForEach(["Rent", "Food", "Travel", "Other"].indices, id: \.self) { i in
                    HStack(spacing: 8) {
                        Circle().fill(Color.primary.opacity(1 - Double(i) * 0.24)).frame(width: 8, height: 8)
                        Text(["Rent", "Food", "Travel", "Other"][i]).font(.system(size: 13)).foregroundStyle(.secondary)
                        Spacer()
                        Text("\(Int(segs[i] * 100))%").font(.system(size: 13, weight: .medium).monospacedDigit())
                    }
                }
            }
        }
        .formaCard()
    }
}