OpenStats/Packages/OpenStatsKit/Sources/OpenStatsUI/Popover/PopoverRootView.swift

import AppKit
import Metrics
import SwiftUI

/// 点击菜单栏单个指标弹出的窄详情。区块可在设置中逐个隐藏
struct PopoverRootView: View {
    let item: MenuBarItem
    @Environment(AppModel.self) private var model
    @Environment(\.isSnapshot) private var isSnapshot

    var body: some View {
        VStack(spacing: 0) {
            PopoverHeader(item: item)
                .padding(.horizontal, DS.Space.s3)
                .padding(.vertical, DS.Space.s2)

            PageScroll {
                switch item {
                case .cpu: CPUPopover()
                case .memory: MemoryPopover()
                case .network: NetworkPopover()
                case .gpu: GPUPopover()
                case .temperature, .fan: ThermalPopover(item: item)
                }
            }
            .frame(maxWidth: .infinity, maxHeight: isSnapshot ? nil : .infinity, alignment: .top)
        }
        .frame(width: DS.Size.popoverWidth)
        .frame(maxHeight: isSnapshot ? nil : .infinity, alignment: .top)
        .fixedSize(horizontal: false, vertical: isSnapshot)
        .background(DS.Palette.background, in: RoundedRectangle(cornerRadius: DS.Radius.xl))
        .overlay {
            RoundedRectangle(cornerRadius: DS.Radius.xl).strokeBorder(DS.Palette.border, lineWidth: DS.Size.stroke)
        }
    }
}

private struct PopoverHeader: View {
    let item: MenuBarItem
    @Environment(AppModel.self) private var model

    var body: some View {
        HStack(spacing: DS.Space.s2) {
            Image(systemName: item.symbol)
                .font(.system(size: DS.TextSize.sm.rawValue, weight: .semibold))
                .foregroundStyle(DS.Palette.textSecondary)
                .frame(width: DS.Size.iconStandalone)
            Text(item.popoverTitle)
                .dsFont(.base, weight: .semibold)
                .foregroundStyle(DS.Palette.textPrimary)
            Spacer(minLength: DS.Space.s2)
            if item == .memory { PurgeMemoryButton() }
            IconButton(systemName: "macwindow", help: "打开 OpenStats 主窗口") { model.openMainWindow(nil) }
            IconButton(systemName: "gearshape", help: "设置") { model.openSettings() }
        }
    }
}

// MARK: - 共用组件

/// 弹窗里的一个区块：小标题 + 内容
struct SectionCard<Trailing: View, Content: View>: View {
    let title: String
    @ViewBuilder var trailing: Trailing
    @ViewBuilder var content: Content

    var body: some View {
        Card(padding: DS.Space.s3, spacing: DS.Space.s2) {
            HStack(spacing: DS.Space.s2) {
                Text(title)
                    .dsFont(.xs, weight: .semibold)
                    .foregroundStyle(DS.Palette.textSecondary)
                Spacer(minLength: DS.Space.s2)
                trailing
                    .dsFont(.xs)
                    .foregroundStyle(DS.Palette.textTertiary)
                    .lineLimit(1)
            }
            content
        }
    }
}

extension SectionCard where Trailing == EmptyView {
    init(title: String, @ViewBuilder content: () -> Content) {
        self.init(title: title, trailing: { EmptyView() }, content: content)
    }
}

/// 左侧标签、右侧数值的一行
struct InfoRow<Value: View>: View {
    let label: String
    @ViewBuilder var value: Value

    var body: some View {
        HStack(alignment: .firstTextBaseline, spacing: DS.Space.s3) {
            Text(label)
                .dsFont(.xs)
                .foregroundStyle(DS.Palette.textSecondary)
                .fixedSize()
            Spacer(minLength: 0)
            value
                .dsFont(.xs, weight: .medium)
                .foregroundStyle(DS.Palette.textPrimary)
                .monospacedDigit()
                .multilineTextAlignment(.trailing)
        }
    }
}

extension InfoRow where Value == Text {
    init(label: String, text: String) {
        self.label = label
        self.value = Text(verbatim: text)
    }
}

/// 点击拷贝的数值（IP、MAC 地址）
struct CopyableText: View {
    let text: String
    @State private var copied = false
    @State private var hovering = false

    var body: some View {
        Button {
            NSPasteboard.general.clearContents()
            NSPasteboard.general.setString(text, forType: .string)
            copied = true
            Task {
                try? await Task.sleep(for: .seconds(1.2))
                copied = false
            }
        } label: {
            Text(verbatim: copied ? "已拷贝" : text)
                .foregroundStyle(copied ? DS.Palette.success : hovering ? DS.Palette.primary : DS.Palette.textPrimary)
                .lineLimit(1)
                .truncationMode(.middle)
                .contentShape(Rectangle())
        }
        .buttonStyle(.plain)
        .onHover { hovering = $0 }
        .help("点击拷贝")
        .disabled(text == "—")
    }
}

/// 区块标题栏里的小图标按钮
struct MiniIconButton: View {
    let systemName: String
    let help: String
    let action: () -> Void
    @State private var hovering = false

    var body: some View {
        Button(action: action) {
            Image(systemName: systemName)
                .font(.system(size: DS.TextSize.xs.rawValue, weight: .semibold))
                .foregroundStyle(hovering ? DS.Palette.textPrimary : DS.Palette.textSecondary)
                .frame(width: DS.Size.segmentHeight, height: DS.Size.segmentHeight)
                .background(hovering ? DS.Palette.surfaceHover : .clear, in: RoundedRectangle(cornerRadius: DS.Radius.sm))
                .contentShape(Rectangle())
        }
        .buttonStyle(.plain)
        .onHover { hovering = $0 }
        .help(help)
        .accessibilityLabel(help)
    }
}

/// 弹窗顶部的大号数值
struct HeroValue: View {
    let value: String
    var unit: String?
    var size: DS.TextSize = .xl

    var body: some View {
        HStack(alignment: .firstTextBaseline, spacing: DS.Space.s1 / 2) {
            Text(verbatim: value)
                .dsFont(size, weight: .semibold)
                .monospacedDigit()
                .foregroundStyle(DS.Palette.textPrimary)
            if let unit {
                Text(verbatim: unit).dsFont(.xs, weight: .medium).foregroundStyle(DS.Palette.textSecondary)
            }
        }
        .lineLimit(1)
    }
}

/// 固定行数的进程列表，数据不足时用占位行，弹窗高度保持不变
struct ProcessList<Row: View>: View {
    let count: Int
    var rowCount = 5
    var emptyText = "正在统计…"
    @ViewBuilder var row: (Int) -> Row

    var body: some View {
        if count == 0 {
            Text(emptyText)
                .dsFont(.xs)
                .foregroundStyle(DS.Palette.textTertiary)
                .frame(maxWidth: .infinity, alignment: .leading)
                .frame(height: Self.rowHeight)
            ForEach(1..<rowCount, id: \.self) { _ in
                Color.clear.frame(height: Self.rowHeight)
            }
        } else {
            ForEach(0..<min(count, rowCount), id: \.self) { index in
                row(index).frame(height: Self.rowHeight)
            }
            ForEach(0..<max(0, rowCount - count), id: \.self) { _ in
                Color.clear.frame(height: Self.rowHeight)
            }
        }
    }

    static var rowHeight: CGFloat { DS.Size.iconInline + DS.Space.s1 }
}

struct ProcessNameLabel: View {
    let icon: Image
    let name: String

    var body: some View {
        HStack(spacing: DS.Space.s2) {
            icon.resizable().frame(width: DS.Size.iconInline, height: DS.Size.iconInline)
            Text(verbatim: name)
                .dsFont(.xs, weight: .medium)
                .foregroundStyle(DS.Palette.textPrimary)
                .lineLimit(1)
            Spacer(minLength: DS.Space.s2)
        }
    }
}