import SwiftUI

/// The web's /admin page: the server build, a way to the accounts, and
/// every worker queue's backlog in the web's order and words.
struct AdminView: View {

    @State private var model: AdminOverviewViewModel

    init(client: GitbayClient) {
        _model = State(initialValue: AdminOverviewViewModel(client: client))
    }

    var body: some View {
        List {
            if let overview = model.state.value {
                Section {
                    NavigationLink(value: RepoRoute.adminUsers) {
                        Label("Accounts", systemImage: "person.2")
                    }
                    .accessibilityIdentifier("admin-accounts")
                    NavigationLink(value: RepoRoute.adminRepos) {
                        Label("Repositories", systemImage: "books.vertical")
                    }
                    .accessibilityIdentifier("admin-repos")
                    NavigationLink(value: RepoRoute.adminOrgLimits) {
                        Label("Organization limits", systemImage: "building.2")
                    }
                    .accessibilityIdentifier("admin-org-limits")
                    NavigationLink(value: RepoRoute.adminStats) {
                        Label("Statistics", systemImage: "chart.bar")
                    }
                    .accessibilityIdentifier("admin-stats")
                    NavigationLink(value: RepoRoute.adminAudit) {
                        Label("Audit log", systemImage: "list.bullet.rectangle")
                    }
                    .accessibilityIdentifier("admin-audit")
                    NavigationLink(value: RepoRoute.adminRunners) {
                        Label("Runners", systemImage: "hammer")
                    }
                    .accessibilityIdentifier("admin-runners")
                    NavigationLink(value: RepoRoute.adminInbound) {
                        Label("Inbound mail", systemImage: "tray.and.arrow.down")
                    }
                    .accessibilityIdentifier("admin-inbound")
                } footer: {
                    if let commit = overview.commit {
                        Text("Server build \(commit).")
                    }
                }
                ForEach(overview.sections) { section in
                    Section {
                        if section.rows.isEmpty {
                            Text(section.empty)
                                .font(.gbSans(.subheadline))
                                .foregroundStyle(.secondary)
                        } else {
                            ForEach(section.rows) { line in
                                VStack(alignment: .leading, spacing: 2) {
                                    Text(line.title)
                                        .font(.gbSans(.subheadline).weight(.medium))
                                    Text(line.detail)
                                        .font(.gbSans(.caption))
                                        .foregroundStyle(.secondary)
                                }
                            }
                        }
                    } header: {
                        Text("\(section.heading) \(section.count)")
                    } footer: {
                        if let summary = section.summary {
                            Text(summary)
                        }
                    }
                }
            }
        }
        .overlay { LoadStateOverlay(state: model.state) }
        .navigationTitle("Admin")
        .navigationBarTitleDisplayMode(.inline)
        .task { await model.load() }
        .refreshable { await model.load() }
    }
}