element-x-ios/ElementX/Sources/Screens/FilePreviewScreen/View/TimelineMediaPreviewRedactConfirmationView.swift

//
// Copyright 2024 New Vector Ltd.
//
// SPDX-License-Identifier: AGPL-3.0-only
// Please see LICENSE in the repository root for full details.
//

import Compound
import SwiftUI

struct TimelineMediaPreviewRedactConfirmationView: View {
    @Environment(\.dismiss) private var dismiss
    
    @ObservedObject var context: TimelineMediaPreviewViewModel.Context
    
    var body: some View {
        ScrollView {
            VStack(spacing: 0) {
                header
                preview
                buttons
            }
        }
        .presentationDetents([.medium])
        .presentationDragIndicator(.visible)
        .padding(.top, 19) // For the drag indicator
        .presentationBackground(.compound.bgCanvasDefault)
        .preferredColorScheme(.dark)
    }
    
    private var header: some View {
        VStack(spacing: 16) {
            BigIcon(icon: \.delete, style: .alertSolid)
            
            VStack(spacing: 8) {
                Text(L10n.screenMediaDetailsRedactConfirmationTitle)
                    .font(.compound.headingMDBold)
                    .foregroundStyle(.compound.textPrimary)
                    .multilineTextAlignment(.center)
                
                Text(L10n.screenMediaDetailsRedactConfirmationMessage)
                    .font(.compound.bodyMD)
                    .foregroundStyle(.compound.textSecondary)
                    .multilineTextAlignment(.center)
            }
        }
        .padding(.top, 24)
        .padding(.bottom, 32)
        .padding(.horizontal, 24)
    }
    
    @ViewBuilder
    private var preview: some View {
        if let currentItem = context.viewState.currentItem {
            HStack(spacing: 12) {
                if let mediaSource = currentItem.thumbnailMediaSource {
                    Color.clear
                        .scaledFrame(size: 40)
                        .background {
                            LoadableImage(mediaSource: mediaSource,
                                          mediaType: .timelineItem(uniqueID: currentItem.id.uniqueID.id),
                                          blurhash: currentItem.blurhash,
                                          mediaProvider: context.mediaProvider) {
                                Color.compound.bgSubtleSecondary
                            }
                            .aspectRatio(contentMode: .fill)
                        }
                        .clipShape(RoundedRectangle(cornerRadius: 8))
                }
                
                VStack(alignment: .leading, spacing: 4) {
                    Text(currentItem.filename ?? "")
                        .font(.compound.bodyMD)
                        .foregroundStyle(.compound.textPrimary)
                    
                    if let contentType = currentItem.contentType {
                        Group {
                            if let fileSize = currentItem.fileSize {
                                Text(contentType) + Text(" – ") + Text(UInt(fileSize).formatted(.byteCount(style: .file)))
                            } else {
                                Text(contentType)
                            }
                        }
                        .font(.compound.bodySM)
                        .foregroundStyle(.compound.textSecondary)
                    }
                }
            }
            .frame(maxWidth: .infinity, alignment: .leading)
            .padding(.horizontal, 24)
            .padding(.bottom, 40)
        }
    }
    
    private var buttons: some View {
        VStack(spacing: 16) {
            Button(L10n.actionRemove, role: .destructive) {
                context.send(viewAction: .redact)
            }
            .buttonStyle(.compound(.primary))
            
            Button {
                dismiss()
            } label: {
                Text(L10n.actionCancel)
                    .padding(.vertical, 14)
            }
            .buttonStyle(.compound(.plain))
        }
        .padding(.bottom, 16)
        .padding(.horizontal, 16)
    }
}

// MARK: - Previews

import UniformTypeIdentifiers

struct TimelineMediaPreviewRedactConfirmationView_Previews: PreviewProvider, TestablePreview {
    static let viewModel = makeViewModel(contentType: .jpeg)
    
    static var previews: some View {
        TimelineMediaPreviewRedactConfirmationView(context: viewModel.context)
    }
    
    static func makeViewModel(contentType: UTType? = nil) -> TimelineMediaPreviewViewModel {
        let previewItems = [
            ImageRoomTimelineItem(id: .randomEvent,
                                  timestamp: .mock,
                                  isOutgoing: false,
                                  isEditable: true,
                                  canBeRepliedTo: true,
                                  isThreaded: false,
                                  sender: .init(id: "@alice:matrix.org",
                                                displayName: "Alice",
                                                avatarURL: .mockMXCUserAvatar),
                                  content: .init(filename: "Amazing Image.jpeg",
                                                 imageInfo: .mockImage,
                                                 thumbnailInfo: .mockThumbnail,
                                                 contentType: contentType))
        ]
        
        let viewModel = TimelineMediaPreviewViewModel(previewItems: previewItems,
                                                      mediaProvider: MediaProviderMock(configuration: .init()),
                                                      userIndicatorController: UserIndicatorControllerMock())
        viewModel.state.currentItem = viewModel.state.previewItems.first
        
        return viewModel
    }
}