// Auteur : Simon-Pierre Boucher — contact@spboucher.ai
// Charge l'estimation complète d'une unité puis affiche EstimateView.
import SwiftUI

struct EstimateLoaderView: View {
    let searchResult: SearchResult
    @State private var data: UnitEstimate?
    @State private var errorMessage: String?

    var body: some View {
        Group {
            if let data {
                EstimateView(data: data)
            } else if let errorMessage {
                VStack(spacing: 14) {
                    Text("!").font(.vpDisplay(40)).foregroundStyle(Color.vpLime)
                    Text(errorMessage)
                        .font(.vpBody(15))
                        .foregroundStyle(Color.vpInk2)
                        .multilineTextAlignment(.center)
                    Button("Réessayer") {
                        self.errorMessage = nil
                        Task { await load() }
                    }
                    .buttonStyle(VPGhostButtonStyle())
                    .frame(width: 180)
                }
                .padding(24)
                .frame(maxWidth: .infinity, maxHeight: .infinity)
                .background(Color.vpPaper)
            } else {
                VStack(spacing: 14) {
                    ProgressView()
                        .controlSize(.large)
                    Text("Calcul de l'estimation…")
                        .font(.vpMono(11))
                        .tracking(1.2)
                        .foregroundStyle(Color.vpInk2)
                    Text("Comparables + modèle hédonique")
                        .font(.vpBody(13))
                        .foregroundStyle(Color.vpInk3)
                }
                .frame(maxWidth: .infinity, maxHeight: .infinity)
                .background(Color.vpPaper)
                .task { await load() }
            }
        }
        .navigationBarTitleDisplayMode(.inline)
    }

    private func load() async {
        do {
            data = try await VraiPrixAPI.shared.estimate(id: searchResult.id)
        } catch {
            errorMessage = error.localizedDescription
        }
    }
}