import Foundation
import UIKit
import SwiftSignalKit
import AsyncDisplayKit
import Display
import Postbox
import TelegramCore
import TelegramPresentationData
import AccountContext
import ComponentFlow
import MultilineTextComponent
import BalancedTextComponent
import AlertComponent
import AlertInputFieldComponent

public func businessLinkNameAlertController(
    context: AccountContext,
    updatedPresentationData: (initial: PresentationData, signal: Signal<PresentationData, NoError>)? = nil,
    value: String?,
    apply: @escaping (String?) -> Void
) -> ViewController {
    let presentationData = context.sharedContext.currentPresentationData.with { $0 }
    let strings = presentationData.strings

    let inputState = AlertInputFieldComponent.ExternalState()

    var content: [AnyComponentWithIdentity<AlertComponentEnvironment>] = []
    content.append(AnyComponentWithIdentity(
        id: "title",
        component: AnyComponent(
            AlertTitleComponent(title: strings.Business_Links_LinkNameTitle)
        )
    ))
    content.append(AnyComponentWithIdentity(
        id: "text",
        component: AnyComponent(
            AlertTextComponent(content: .plain(strings.Business_Links_LinkNameText))
        )
    ))

    var applyImpl: (() -> Void)?
    content.append(AnyComponentWithIdentity(
        id: "input",
        component: AnyComponent(
            AlertInputFieldComponent(
                context: context,
                initialValue: value,
                placeholder: strings.Business_Links_LinkNameInputPlaceholder,
                characterLimit: 32,
                hasClearButton: false,
                isInitiallyFocused: true,
                externalState: inputState,
                returnKeyAction: {
                    applyImpl?()
                }
            )
        )
    ))

    var effectiveUpdatedPresentationData: (PresentationData, Signal<PresentationData, NoError>)
    if let updatedPresentationData {
        effectiveUpdatedPresentationData = updatedPresentationData
    } else {
        effectiveUpdatedPresentationData = (presentationData, context.sharedContext.presentationData)
    }

    let alertController = AlertScreen(
        configuration: AlertScreen.Configuration(allowInputInset: true),
        content: content,
        actions: [
            .init(title: strings.Common_Cancel),
            .init(title: strings.Common_Done, type: .default, action: {
                applyImpl?()
            })
        ],
        updatedPresentationData: effectiveUpdatedPresentationData
    )
    applyImpl = {
        apply(inputState.value)
    }
    return alertController
}