//
//  HistoryView.swift
//  Prisme
//
//  Author: Simon-Pierre Boucher <contact@spboucher.ai>
//

import SwiftUI

/// Semantic history browser: recent visits by day, natural language search
/// on top ("le site avec la recette de ramen vu au printemps").
struct HistoryView: View {
    let history: HistoryStore
    let containers: IdentityContainerStore
    let onOpen: (PageVisit) -> Void

    @Environment(\.dismiss) private var dismiss
    @State private var query = ""

    private var results: [PageVisit] {
        query.trimmingCharacters(in: .whitespaces).count >= 2
            ? history.search(query)
            : history.recent
    }

    var body: some View {
        NavigationStack {
            Group {
                if results.isEmpty {
                    ContentUnavailableView {
                        Label(
                            query.isEmpty ? "Encore rien à retrouver" : "Rien trouvé",
                            systemImage: "clock.arrow.circlepath"
                        )
                    } description: {
                        Text(query.isEmpty
                            ? "Les pages visitées seront retrouvables ici, en langage naturel. Tout reste sur l'appareil."
                            : "Aucune page visitée ne correspond à « \(query) ».")
                    }
                } else {
                    visitList
                }
            }
            .navigationTitle("Historique")
            .navigationBarTitleDisplayMode(.inline)
            .searchable(
                text: $query,
                placement: .navigationBarDrawer(displayMode: .always),
                prompt: "Rechercher une page visitée…"
            )
            .toolbar {
                ToolbarItem(placement: .cancellationAction) {
                    Button("Fermer") { dismiss() }
                }
            }
        }
    }

    private var visitList: some View {
        List(results, id: \.urlString) { visit in
            Button {
                onOpen(visit)
                dismiss()
            } label: {
                HStack(alignment: .top, spacing: Spacing.m) {
                    Circle()
                        .fill(color(for: visit))
                        .frame(width: 8, height: 8)
                        .padding(.top, 6)
                    VStack(alignment: .leading, spacing: 2) {
                        Text(visit.title)
                            .foregroundStyle(.primary)
                            .lineLimit(2)
                        HStack(spacing: Spacing.xs) {
                            Text(visit.host)
                            Text("·")
                            Text(visit.visitedAt, style: .relative)
                        }
                        .font(.caption)
                        .foregroundStyle(.secondary)
                        if !visit.gist.isEmpty {
                            Text(visit.gist)
                                .font(.caption)
                                .foregroundStyle(.tertiary)
                                .lineLimit(2)
                        }
                    }
                }
            }
            .accessibilityIdentifier("history.row")
        }
        .listStyle(.plain)
    }

    private func color(for visit: PageVisit) -> Color {
        containers.container(for: visit.containerID)?.color.color ?? .secondary
    }
}