//
//  SidebarHelpSectionView.swift
//  USB Meter
//

import SwiftUI

struct SidebarHelpSectionView<BluetoothHelpDestination: View, DeviceHelpDestination: View>: View {
    let activeReason: SidebarHelpReason?
    let isExpanded: Bool
    let bluetoothStatusTint: Color
    let bluetoothStatusText: String
    let cloudSyncHelpTitle: String
    let cloudSyncHelpMessage: String
    let onToggle: () -> Void
    let onOpenSettings: () -> Void
    let bluetoothHelpDestination: BluetoothHelpDestination
    let deviceHelpDestination: DeviceHelpDestination

    init(
        activeReason: SidebarHelpReason?,
        isExpanded: Bool,
        bluetoothStatusTint: Color,
        bluetoothStatusText: String,
        cloudSyncHelpTitle: String,
        cloudSyncHelpMessage: String,
        onToggle: @escaping () -> Void,
        onOpenSettings: @escaping () -> Void,
        @ViewBuilder bluetoothHelpDestination: () -> BluetoothHelpDestination,
        @ViewBuilder deviceHelpDestination: () -> DeviceHelpDestination
    ) {
        self.activeReason = activeReason
        self.isExpanded = isExpanded
        self.bluetoothStatusTint = bluetoothStatusTint
        self.bluetoothStatusText = bluetoothStatusText
        self.cloudSyncHelpTitle = cloudSyncHelpTitle
        self.cloudSyncHelpMessage = cloudSyncHelpMessage
        self.onToggle = onToggle
        self.onOpenSettings = onOpenSettings
        self.bluetoothHelpDestination = bluetoothHelpDestination()
        self.deviceHelpDestination = deviceHelpDestination()
    }

    var body: some View {
        Section(header: Text("Help & Troubleshooting").font(.headline)) {
            Button(action: onToggle) {
                HStack(spacing: 14) {
                    Image(systemName: sectionSymbol)
                        .font(.system(size: 18, weight: .semibold))
                        .foregroundColor(sectionTint)
                        .frame(width: 42, height: 42)
                        .background(Circle().fill(sectionTint.opacity(0.18)))

                    Text("Help")
                        .font(.headline)

                    Spacer()

                    if let activeReason {
                        Text(activeReason.badgeTitle)
                            .font(.caption2.weight(.bold))
                            .foregroundColor(activeReason.tint)
                            .padding(.horizontal, 10)
                            .padding(.vertical, 6)
                            .background(
                                Capsule(style: .continuous)
                                    .fill(activeReason.tint.opacity(0.12))
                            )
                            .overlay(
                                Capsule(style: .continuous)
                                    .stroke(activeReason.tint.opacity(0.22), lineWidth: 1)
                            )
                    }

                    Image(systemName: isExpanded ? "chevron.up" : "chevron.down")
                        .font(.footnote.weight(.bold))
                        .foregroundColor(.secondary)
                }
                .padding(14)
                .meterCard(tint: sectionTint, fillOpacity: 0.16, strokeOpacity: 0.22, cornerRadius: 18)
            }
            .buttonStyle(.plain)

            if isExpanded {
                if let activeReason {
                    SidebarHelpNoticeCardView(
                        reason: activeReason,
                        cloudSyncHelpTitle: cloudSyncHelpTitle,
                        cloudSyncHelpMessage: cloudSyncHelpMessage
                    )
                }

                SidebarBluetoothStatusCardView(
                    tint: bluetoothStatusTint,
                    statusText: bluetoothStatusText
                )

                if activeReason == .cloudSyncUnavailable {
                    Button(action: onOpenSettings) {
                        SidebarLinkCardView(
                            title: "Open Settings",
                            subtitle: "Check Apple ID, iCloud Drive, and any restrictions affecting Cloud sync.",
                            symbol: "gearshape.fill",
                            tint: .indigo
                        )
                    }
                    .buttonStyle(.plain)
                }

                NavigationLink(destination: bluetoothHelpDestination) {
                    SidebarLinkCardView(
                        title: "Bluetooth",
                        subtitle: "Permissions, adapter state, and connection tips.",
                        symbol: "bolt.horizontal.circle.fill",
                        tint: bluetoothStatusTint
                    )
                }
                .buttonStyle(.plain)

                NavigationLink(destination: deviceHelpDestination) {
                    SidebarLinkCardView(
                        title: "Device",
                        subtitle: "Quick checks when a meter is not responding as expected.",
                        symbol: "questionmark.circle.fill",
                        tint: .orange
                    )
                }
                .buttonStyle(.plain)
            }
        }
        .animation(.easeInOut(duration: 0.22), value: isExpanded)
    }

    private var sectionTint: Color {
        activeReason?.tint ?? .secondary
    }

    private var sectionSymbol: String {
        activeReason?.symbol ?? "questionmark.circle.fill"
    }
}