import SwiftUI
import SFSafeSymbols

struct UploadSheet: View {

    @EnvironmentObject
    private var content: Content

    @EnvironmentObject
    private var upload: RemotePush

    @Environment(\.dismiss)
    private var dismiss

    @State
    private var output: [String] = ["Ready to upload"]

    private var uploadSymbol: SFSymbol {
        if upload.isTransmittingToRemote {
            return .squareAndArrowUpBadgeClock
        }
        if !upload.lastPushWasSuccessful {
            return .squareAndArrowUpTrianglebadgeExclamationmark
        }
        return .squareAndArrowUp
    }

    var header: String {
        let user = content.settings.general.remoteUserForUpload
        let port = content.settings.general.remotePortForUpload
        let url = content.settings.general.url.withHttpPrefixRemoved
        let path = content.settings.general.remotePathForUpload.withLeadingSlashRemoved
        return "\(user)@\(url):\(port)/\(path)"
    }

    var body: some View {
        VStack {
            HStack {
                Button("Upload", action: startUpload)
                    .disabled(upload.isTransmittingToRemote)
                Text(header)
                Spacer()
                Button("Close", action: { dismiss() })
            }
            ScrollView {
                Text(output.joined(separator: "\n"))
                    .font(.body.monospaced())
                    .foregroundStyle(.primary)
                    .frame(maxWidth: .infinity, alignment: .leading)
            }
        }
        .padding()
        .frame(minWidth: 500, idealWidth: 600)
    }

    private func startUpload() {
        guard let folder = content.storage.outputScope?.url.path() else {
            output = ["No output folder to start upload"]
            return
        }
        output = ["Starting upload..."]

        upload.transmitToRemote(
            settings: content.settings.general,
            outputFolder: folder) { newContent in
                DispatchQueue.main.async {
                    let newLines = newContent.components(separatedBy: "\n").suffix(4)
                    self.output = (self.output + newLines).suffix(4)
                }
            }
    }
}