// Auteur : Simon-Pierre Boucher — contact@spboucher.ai
// StatusView.swift — l'état des 13 plateformes Groupe-KA : pastille vert/rouge
// (HEAD sur https://www.<domaine>/), latence, ouverture du site, actualisation
// toutes les 5 minutes (pouls partagé) ou manuelle.
import SwiftUI

struct StatusView: View {
    @EnvironmentObject private var pulse: EcosystemPulse
    @Environment(\.colorScheme) private var scheme

    var body: some View {
        ScrollView {
            VStack(alignment: .leading, spacing: 14) {
                header
                summary
                LazyVStack(spacing: 9) {
                    ForEach(pulse.health) { s in
                        row(s)
                    }
                }
                Text("Vérification : requête HEAD sur https://<domaine>/ — vert si le serveur répond (200–399, ou 405 quand HEAD est refusé). Actualisé automatiquement toutes les 5 minutes.")
                    .font(.caption2).foregroundStyle(.tertiary)
            }
            .padding(18)
            .frame(maxWidth: 720)
            .frame(maxWidth: .infinity)
        }
        .background(KATheme.paper(scheme))
    }

    private var header: some View {
        HStack(alignment: .firstTextBaseline) {
            Text("Statut des plateformes").font(.title2.weight(.bold))
            Spacer()
            if let d = pulse.lastRefresh {
                Text("Actualisé \(d.formatted(.relative(presentation: .named, unitsStyle: .narrow)))")
                    .font(.caption).foregroundStyle(.secondary)
            }
            Button {
                Task { await pulse.refresh() }
            } label: {
                if pulse.refreshing {
                    ProgressView().controlSize(.small)
                } else {
                    Label("Actualiser", systemImage: "arrow.clockwise").font(.caption)
                }
            }
            .disabled(pulse.refreshing)
        }
    }

    private var summary: some View {
        HStack(spacing: 12) {
            let up = pulse.servicesUp
            let total = pulse.health.count
            KAStatusDot(up: up == total ? true : (up == 0 ? false : nil))
            Text(up == total
                 ? "Les \(total) services sont en ligne."
                 : "\(up) service\(up > 1 ? "s" : "") en ligne sur \(total).")
                .font(.subheadline.weight(.semibold))
            Spacer()
            Link("Page de statut officielle", destination: Ecosystem.statusURL)
                .font(.caption.weight(.semibold))
                .foregroundStyle(KATheme.green)
        }
        .padding(13)
        .frame(maxWidth: .infinity, alignment: .leading)
        .kaCard(accent: pulse.servicesUp == pulse.health.count ? KATheme.green : .orange)
    }

    private func row(_ s: ServiceHealth) -> some View {
        HStack(spacing: 11) {
            KAStatusDot(up: s.up)
            VStack(alignment: .leading, spacing: 2) {
                Text(s.name).font(.subheadline.weight(.bold))
                Text(s.id).font(.system(.caption2, design: .monospaced)).foregroundStyle(.secondary)
            }
            Spacer()
            if let ms = s.latencyMs, s.up != nil {
                Text("\(ms) ms")
                    .font(.system(.caption, design: .monospaced).weight(.bold))
                    .foregroundStyle(ms < 500 ? KATheme.green : .orange)
                    .padding(.horizontal, 8).padding(.vertical, 3)
                    .background((ms < 500 ? KATheme.green : Color.orange).opacity(0.12), in: Capsule())
            } else if s.up == nil {
                Text("vérification…").font(.caption2).foregroundStyle(.tertiary)
            }
            Link(destination: URL(string: "https://\(s.id)/")!) {
                Image(systemName: "arrow.up.right.square")
            }
            .foregroundStyle(.secondary)
            .help("Ouvrir https://\(s.id)/")
        }
        .padding(.horizontal, 14).padding(.vertical, 10)
        .frame(maxWidth: .infinity, alignment: .leading)
        .kaCard(accent: s.up == false ? .red : nil)
    }
}