//
//  MigrateContentView+Table.swift
//  Passepartout
//
//  Created by Davide De Rosa on 11/13/24.
//  Copyright (c) 2024 Davide De Rosa. All rights reserved.
//
//  https://github.com/passepartoutvpn
//
//  This file is part of Passepartout.
//
//  Passepartout is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  Passepartout is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with Passepartout.  If not, see <http://www.gnu.org/licenses/>.
//

import CommonLibrary
import SwiftUI

extension MigrateContentView {
    struct TableView: View {

        @EnvironmentObject
        private var theme: Theme

        let step: MigrateViewStep

        let profiles: [MigratableProfile]

        @Binding
        var statuses: [UUID: MigrationStatus]

        let onDelete: ([MigratableProfile]) -> Void

        let performButton: () -> PerformButton

        var body: some View {
            Form {
                Section {
                    Text(Strings.Views.Migrate.Sections.Main.header)
                }
                Section {
                    Table(profiles) {
                        TableColumn(Strings.Global.name) {
                            Text($0.name)
                                .foregroundStyle(statuses.style(for: $0.id))
                        }
                        TableColumn(Strings.Global.lastUpdate) {
                            Text($0.timestamp)
                                .foregroundStyle(statuses.style(for: $0.id))
                        }
                        TableColumn("") {
                            ControlView(
                                step: step,
                                isIncluded: isIncludedBinding(for: $0.id),
                                status: statuses[$0.id]
                            )
                            .environmentObject(theme) // TODO: #873, Table loses environment
                        }
                        .width(20)
                        TableColumn("") { profile in
                            Button {
                                onDelete([profile])
                            } label: {
                                ThemeImage(.editableSectionRemove)
                            }
                            .environmentObject(theme) // TODO: #873, Table loses environment
                        }
                        .width(20)
                    }
                }
                .disabled(!step.canSelect)
            }
            .themeForm()
            .toolbar {
                ToolbarItem(placement: .confirmationAction, content: performButton)
            }
        }
    }
}

private extension MigrateContentView.TableView {
    func isIncludedBinding(for profileId: UUID) -> Binding<Bool> {
        Binding {
            statuses[profileId] != .excluded
        } set: {
            if $0 {
                statuses.removeValue(forKey: profileId)
            } else {
                statuses[profileId] = .excluded
            }
        }
    }
}

private extension MigrateContentView.TableView {
    struct ControlView: View {
        let step: MigrateViewStep

        @Binding
        var isIncluded: Bool

        let status: MigrationStatus?

        var body: some View {
            switch step {
            case .initial, .fetching, .fetched:
                Toggle("", isOn: $isIncluded)
                    .labelsHidden()

            default:
                statusView
            }
        }

        @ViewBuilder
        var statusView: some View {
            switch status {
            case .excluded:
                Text("--")

            case .pending:
                ThemeImage(.progress)

            case .migrated, .imported:
                ThemeImage(.marked)

            case .failed:
                ThemeImage(.failure)

            case .none:
                EmptyView()
            }
        }
    }
}

private extension MigratableProfile {
    var timestamp: String {
        lastUpdate?.localizedDescription(style: .timestamp) ?? ""
    }
}