import SwiftUI
import VoiceCatCore

/// A single user row with its admin context menu and the sheets those actions present.
/// Self-contained (owns its own sheet state) so it can be reused both by the iPad
/// `UserListView` middle column and by the iPhone `ChannelDetailView` drill-down.
struct UserRow: View {
    let user: User
    @Bindable var session: SessionState

    @State private var activeSheet: ActiveSheet?

    private enum ActiveSheet: Identifiable {
        case tuning, ban, move, permissions
        var id: Int { hashValue }
    }

    var body: some View {
        UserRowView(user: user, isSelf: user.id == session.selfUserId)
            .contextMenu { contextMenu }
            // The context menu is long-press only, which VoiceOver doesn't surface — mirror the
            // same buttons as accessibility actions so VoiceOver users can reach per-user tuning
            // (and the admin actions) via the actions rotor on the focused row.
            .accessibilityActions { contextMenu }
            .sheet(item: $activeSheet) { sheet in
                switch sheet {
                case .tuning:      PerUserTuningView(user: user, session: session)
                case .ban:         BanUserView(user: user, session: session)
                case .move:        MoveUserView(user: user, session: session)
                case .permissions: PermissionsView(user: user, session: session)
                }
            }
    }

    @ViewBuilder
    private var contextMenu: some View {
        if user.id != session.selfUserId {
            Button {
                activeSheet = .tuning
            } label: {
                Label("Volume / NR", systemImage: "speaker.wave.2")
            }
            if session.permissions.canKick || session.permissions.isAdmin {
                Divider()
                Button {
                    session.kickUser(user.id, reason: "")
                } label: {
                    Label("Kick", systemImage: "person.fill.xmark")
                }
                if session.permissions.canBan || session.permissions.isAdmin {
                    Button(role: .destructive) {
                        activeSheet = .ban
                    } label: {
                        Label("Ban…", systemImage: "nosign")
                    }
                }
            }
            if session.permissions.canMoveUsers || session.permissions.isAdmin {
                Button {
                    activeSheet = .move
                } label: {
                    Label("Move to channel…", systemImage: "arrow.right.circle")
                }
            }
            if session.permissions.isAdmin {
                Divider()
                let muted = user.serverMuted
                Button {
                    session.setServerMute(user.id, muted: !muted, deafened: user.serverDeafened)
                } label: {
                    Label(muted ? "Unmute" : "Server Mute", systemImage: muted ? "mic" : "mic.slash")
                }
                Button {
                    activeSheet = .permissions
                } label: {
                    Label("Permissions…", systemImage: "lock.shield")
                }
            }
        }
    }
}

private struct UserRowView: View {
    let user: User
    let isSelf: Bool

    var body: some View {
        HStack(spacing: 10) {
            Image(systemName: user.selfMicMuted || user.serverMuted ? "mic.slash.fill" : "mic.fill")
                .foregroundStyle(user.selfMicMuted || user.serverMuted ? .red : .green)
                .imageScale(.small)
                .accessibilityHidden(true)
            VStack(alignment: .leading, spacing: 1) {
                HStack(spacing: 4) {
                    Text(user.nickname)
                        .fontWeight(isSelf ? .semibold : .regular)
                    if isSelf {
                        Text("(you)")
                            .font(.caption2)
                            .foregroundStyle(.secondary)
                    }
                    if user.isGuest {
                        Text("guest")
                            .font(.caption2)
                            .foregroundStyle(.secondary)
                    }
                }
                if user.serverMuted || user.serverDeafened {
                    Text(user.serverDeafened ? "server deafened" : "server muted")
                        .font(.caption2)
                        .foregroundStyle(.orange)
                }
            }
            Spacer()
            if user.selfDeafened {
                Image(systemName: "headphones.slash")
                    .imageScale(.small)
                    .foregroundStyle(.secondary)
                    .accessibilityHidden(true)
            }
        }
        .accessibilityElement(children: .combine)
        .accessibilityLabel("\(user.nickname)\(isSelf ? ", you" : "")\(user.isGuest ? ", guest" : "")\(user.selfMicMuted ? ", muted" : "")\(user.serverMuted ? ", server muted" : "")")
    }
}