//
//  ContactManager.swift
//  Padel Tournament
//
//  Created by Razmig Sarkissian on 19/09/2023.
//

import Foundation
import SwiftUI
import MessageUI
import LeStorage

enum ContactManagerError: LocalizedError {
    case mailFailed
    case mailNotSent //no network no error
    case messageFailed
    case messageNotSent //no network no error
}

enum ContactType: Identifiable {
    case mail(date: Date?, recipients: [String]?, bccRecipients: [String]?, body: String?, subject: String?, tournamentBuild: TournamentBuild?)
    case message(date: Date?, recipients: [String]?, body: String?, tournamentBuild: TournamentBuild?)
    
    var id: Int {
        switch self {
        case .message: return 0
        case .mail: return 1
        }
    }
}

extension ContactType {
    static let defaultCustomMessage = "Il est conseillé de vous présenter 10 minutes avant de jouer.\nMerci de confirmer en répondant à ce message et de prévenir votre partenaire."
    static let defaultSignature = ""

    static func callingGroupStageCustomMessage(tournament: Tournament?, startDate: Date?, roundLabel: String) -> String {
        let tournamentCustomMessage = DataStore.shared.appSettings.callMessageBody ?? defaultCustomMessage
        let clubName = tournament?.clubName ?? ""

        var text = tournamentCustomMessage
        let date = startDate ?? tournament?.startDate ?? Date()

        if let tournament {
            text = text.replacingOccurrences(of: "#titre", with: tournament.tournamentTitle())
        }
        
        text = text.replacingOccurrences(of: "#club", with: clubName)
        text = text.replacingOccurrences(of: "#round", with: roundLabel)
        text = text.replacingOccurrences(of: "#jour", with: "\(date.formatted(Date.FormatStyle().weekday(.wide).day().month(.wide)))")
        text = text.replacingOccurrences(of: "#horaire", with: "\(date.formatted(Date.FormatStyle().hour().minute()))")
        
        let signature = DataStore.shared.appSettings.callMessageSignature ?? defaultSignature

        text = text.replacingOccurrences(of: "#signature", with: signature)
        return text
    }
    
    static func callingGroupStageMessage(tournament: Tournament?, startDate: Date?, roundLabel: String, matchFormat: MatchFormat?) -> String {
        
        let useFullCustomMessage = DataStore.shared.appSettings.callUseFullCustomMessage ?? false

        if useFullCustomMessage {
            return callingGroupStageCustomMessage(tournament: tournament, startDate: startDate, roundLabel: roundLabel)
        }

        let date = startDate ?? tournament?.startDate ?? Date()

        let clubName = tournament?.clubName ?? ""
        let message = DataStore.shared.appSettings.callMessageBody ?? defaultCustomMessage
        let signature = DataStore.shared.appSettings.callMessageSignature ?? defaultSignature

        let localizedCalled = "convoqué" + (tournament?.tournamentCategory == .women ? "e" : "") + "s"
        
        var formatMessage: String? {
            (DataStore.shared.appSettings.callDisplayFormat ?? false) ? matchFormat?.computedLongLabel.appending(".") : nil
        }
        
        var entryFeeMessage: String? {
            (DataStore.shared.appSettings.callDisplayEntryFee ?? false) ? tournament?.entryFeeMessage : nil
        }
        
        var computedMessage: String {
            [formatMessage, entryFeeMessage, message].compacted().map { $0.trimmed }.joined(separator: "\n")
        }

        if let tournament {
            return "Bonjour,\n\nVous êtes \(localizedCalled) pour jouer en  \(roundLabel.lowercased()) du \(tournament.tournamentTitle()) au \(clubName) le \(date.formatted(Date.FormatStyle().weekday(.wide).day().month(.wide))) à \(date.formatted(Date.FormatStyle().hour().minute())).\n\n" + computedMessage + "\n\n\(signature)"
        } else {
            return "Bonjour,\n\nVous êtes \(localizedCalled) \(roundLabel) au \(clubName) le \(date.formatted(Date.FormatStyle().weekday(.wide).day().month(.wide))) à \(date.formatted(Date.FormatStyle().hour().minute())).\n\nMerci de confirmer en répondant à ce message et de prévenir votre partenaire !\n\n\(signature)"
        }
    }
}


struct MessageComposeView: UIViewControllerRepresentable {
    typealias Completion = (_ result: MessageComposeResult) -> Void

    static var canSendText: Bool { MFMessageComposeViewController.canSendText() }
        
    let recipients: [String]?
    let body: String?
    let completion: Completion?
    
    func makeUIViewController(context: Context) -> UIViewController {
        guard Self.canSendText else {
            let errorView = ContentUnavailableView("Aucun compte de messagerie", systemImage: "xmark", description: Text("Aucun compte de messagerie n'est configuré sur cet appareil."))
            return UIHostingController(rootView: errorView)
        }
        
        let controller = MFMessageComposeViewController()
        controller.messageComposeDelegate = context.coordinator
        controller.recipients = recipients
        controller.body = body
        
        return controller
    }
    
    func updateUIViewController(_ uiViewController: UIViewController, context: Context) {}
    
    func makeCoordinator() -> Coordinator {
        Coordinator(completion: self.completion)
    }
    
    class Coordinator: NSObject, MFMessageComposeViewControllerDelegate {
        private let completion: Completion?

        public init(completion: Completion?) {
            self.completion = completion
        }
        
        public func messageComposeViewController(_ controller: MFMessageComposeViewController, didFinishWith result: MessageComposeResult) {
            controller.dismiss(animated: true, completion: {
                self.completion?(result)
            })
        }
    }
}

struct MailComposeView: UIViewControllerRepresentable {
    typealias Completion = (_ result: MFMailComposeResult) -> Void

    static var canSendMail: Bool {
        if let mailURL = URL(string: "mailto:?to=jap@padelclub.com") {
            let mailConfigured = UIApplication.shared.canOpenURL(mailURL)
            return mailConfigured && MFMailComposeViewController.canSendMail()
        } else {
            return MFMailComposeViewController.canSendMail()
        }
    }
        
    let recipients: [String]?
    let bccRecipients: [String]?
    let body: String?
    let subject: String?
    let completion: Completion?
    
    func makeUIViewController(context: Context) -> UIViewController {
        guard Self.canSendMail else {
            let errorView = ContentUnavailableView("Aucun compte mail", systemImage: "xmark", description: Text("Aucun compte mail n'est configuré sur cet appareil."))
            return UIHostingController(rootView: errorView)
        }
        
        let controller = MFMailComposeViewController()
        controller.mailComposeDelegate = context.coordinator
        controller.setToRecipients(recipients)
        controller.setBccRecipients(bccRecipients)
        if let body {
            controller.setMessageBody(body, isHTML: false)
        }
        if let subject {
            controller.setSubject(subject)
        }

        return controller
    }
    
    func updateUIViewController(_ uiViewController: UIViewController, context: Context) {}
    
    func makeCoordinator() -> Coordinator {
        Coordinator(completion: self.completion)
    }
    
    class Coordinator: NSObject, MFMailComposeViewControllerDelegate {
        private let completion: Completion?

        public init(completion: Completion?) {
            self.completion = completion
        }
        
        public func mailComposeController(_ controller: MFMailComposeViewController, didFinishWith result: MFMailComposeResult, error: Error?) {
            controller.dismiss(animated: true, completion: {
                self.completion?(result)
            })
        }
    }
}