import SwiftUI

/// 编辑页共享样式：深色 Form 行背景 + 主文字色。
extension View {
    func txRow(_ p: TXPalette) -> some View {
        self.listRowBackground(p.surface).foregroundStyle(p.textPrimary)
    }
}

/// 深色主题的表单文本字段。
struct TXTextField: View {
    let title: String
    @Binding var text: String
    var placeholder: String = ""
    var keyboard: UIKeyboardType = .default
    var secure: Bool = false
    @EnvironmentObject var theme: TXThemeManager
    private var p: TXPalette { theme.palette }

    var body: some View {
        Group {
            if secure {
                SecureField(placeholder.isEmpty ? title : placeholder, text: $text)
            } else {
                TextField(placeholder.isEmpty ? title : placeholder, text: $text)
                    .keyboardType(keyboard)
                    .autocorrectionDisabled()
                    .textInputAutocapitalization(.never)
            }
        }
        .foregroundStyle(p.textPrimary)
        .txRow(p)
    }
}

/// 空状态占位（列表为空时）。
struct TXEmptyState: View {
    let icon: String
    let title: String
    let subtitle: String
    @EnvironmentObject var theme: TXThemeManager
    private var p: TXPalette { theme.palette }

    var body: some View {
        VStack(spacing: TX.Space.s) {
            Image(systemName: icon)
                .font(.system(size: 34, weight: .light))
                .foregroundStyle(p.textTertiary)
            Text(title).font(.system(size: 15)).foregroundStyle(p.textSecondary)
            Text(subtitle).font(.system(size: 13)).foregroundStyle(p.textTertiary)
                .multilineTextAlignment(.center)
        }
        .frame(maxWidth: .infinity)
        .padding(.vertical, 48)
    }
}