//
//  ReportIssueView.swift
//  Passepartout
//
//  Created by Davide De Rosa on 3/24/22.
//  Copyright (c) 2022 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 SwiftUI
import MessageUI
import PassepartoutLibrary

struct ReportIssueView: View {
    @Binding private var isPresented: Bool
    
    private let toRecipients: [String]
    
    private let subject: String
    
    private let messageBody: String
    
    private let attachments: [MailComposerView.Attachment]
    
    init(
        isPresented: Binding<Bool>,
        vpnProtocol: VPNProtocolType,
        logURL: URL?,
        providerMetadata: ProviderMetadata? = nil,
        lastUpdate: Date? = nil
    ) {
        _isPresented = isPresented
        
        toRecipients = [Unlocalized.Issues.recipient]
        subject = Unlocalized.Issues.subject

        let bodyContent = Unlocalized.Issues.template
        var bodyMetadata = "--\n\n"
        bodyMetadata += DebugLog(content: "").decoratedString()

        if let metadata = providerMetadata {
            bodyMetadata += "Provider: \(metadata.fullName)\n"
            if let lastUpdate = lastUpdate {
                bodyMetadata += "Last updated: \(lastUpdate)\n"
            }
            bodyMetadata += "\n"
        }
        bodyMetadata += "--"
        messageBody = Unlocalized.Issues.body(bodyContent, bodyMetadata)

        var attachments: [MailComposerView.Attachment] = []
        if let logURL = logURL {
            let logContent = logURL.trailingContent(bytes: Unlocalized.Issues.maxLogBytes)
            let attachment = DebugLog(content: logContent).decoratedData()

            attachments.append((
                attachment,
                Unlocalized.Issues.MIME.debugLog,
                Unlocalized.Issues.Filenames.debugLog
            ))
        }
        self.attachments = attachments
    }
    
    var body: some View {
        MailComposerView(
            isPresented: $isPresented,
            toRecipients: toRecipients,
            subject: subject,
            messageBody: messageBody,
            attachments: attachments
        )
    }
}