import QtQuick 2.15
import QtQuick.Controls 2.15
import QtQuick.Layouts 1.15
import QtQml 2.15

import StatusQ.Components 0.1
import StatusQ.Controls 0.1
import StatusQ.Core 0.1
import StatusQ.Core.Backpressure 0.1
import StatusQ.Core.Theme 0.1
import StatusQ.Core.Utils 0.1

import utils 1.0
import shared 1.0
import shared.popups 1.0
import shared.status 1.0
import shared.controls 1.0
import shared.views.chat 1.0
import shared.popups.send 1.0
import SortFilterProxyModel 0.2

import AppLayouts.Communities.popups 1.0
import AppLayouts.Communities.panels 1.0
import AppLayouts.Profile.stores 1.0

import "../helpers"
import "../controls"
import "../popups"
import "../panels"
import "../../Wallet"
import "../stores"

Item {
    id: root

    // Important: we have parent module in this context only cause qml components
    // don't follow struct we have on the backend.
    property var parentModule

    property RootStore rootStore
    property CreateChatPropertiesStore createChatPropertiesStore
    property ContactsStore contactsStore
    property var emojiPopup
    property var stickersPopup

    property string activeChatId: parentModule && parentModule.activeItem.id
    property int chatsCount: parentModule && parentModule.model ? parentModule.model.count : 0
    property int activeChatType: parentModule && parentModule.activeItem.type
    property bool stickersLoaded: false
    property bool canPost: true
    property var viewAndPostHoldingsModel

    readonly property var contactDetails: rootStore ? rootStore.oneToOneChatContact : null
    readonly property bool isUserAdded: !!root.contactDetails && root.contactDetails.isContactRequestSent
    property bool amISectionAdmin: false

    signal openStickerPackPopup(string stickerPackId)

    // This function is called once `1:1` or `group` chat is created.
    function checkForCreateChatOptions(chatId) {
        if (root.createChatPropertiesStore.createChatStickerHashId !== ""
                && root.createChatPropertiesStore.createChatStickerPackId !== ""
                && root.createChatPropertiesStore.createChatStickerUrl !== "") {
            root.rootStore.sendSticker(
                        chatId,
                        root.createChatPropertiesStore.createChatStickerHashId,
                        "",
                        root.createChatPropertiesStore.createChatStickerPackId,
                        root.createChatPropertiesStore.createChatStickerUrl)
        } else if (root.createChatPropertiesStore.createChatInitMessage !== ""
                 || root.createChatPropertiesStore.createChatFileUrls.length > 0) {
            root.rootStore.sendMessage(
                        chatId, Qt.Key_Enter,
                        root.createChatPropertiesStore.createChatInitMessage,
                        "", root.createChatPropertiesStore.createChatFileUrls)
        }

        root.createChatPropertiesStore.resetProperties()
    }

    QtObject {
        id: d
        readonly property var activeChatContentModule: d.getChatContentModule(root.activeChatId)

        property bool sendingInProgress: !!d.activeChatContentModule? d.activeChatContentModule.inputAreaModule.sendingInProgress : false

        readonly property var urlsList: {
            if (!d.activeChatContentModule) {
                return
            }
            urlsModelChangeTracker.revision
            ModelUtils.modelToFlatArray(d.activeChatContentModule.inputAreaModule.urlsModel, "url")
        }

        readonly property ModelChangeTracker urlsModelChangeTracker: ModelChangeTracker {
            model: !!d.activeChatContentModule ? d.activeChatContentModule.inputAreaModule.urlsModel : null
        }

        readonly property UsersStore activeUsersStore: UsersStore {
            usersModule: !!d.activeChatContentModule ? d.activeChatContentModule.usersModule : null
        }

        readonly property MessageStore activeMessagesStore: MessageStore {
            messageModule: d.activeChatContentModule ? d.activeChatContentModule.messagesModule : null
            chatSectionModule: root.rootStore.chatCommunitySectionModule
        }

        readonly property string linkPreviewBeginAnchor: `<a style="text-decoration:none" href="#${Constants.appSection.profile}/${Constants.settingsSubsection.messaging}">`
        readonly property string linkPreviewEndAnchor: `</a>`

        readonly property string linkPreviewEnabledNotification: qsTr("Link previews will be shown for all sites. You can manage link previews in %1.", "Go to settings").arg(linkPreviewBeginAnchor + qsTr("Settings", "Go to settings page") + linkPreviewEndAnchor)
        readonly property string linkPreviewDisabledNotification: qsTr("Link previews will never be shown. You can manage link previews in %1.").arg(linkPreviewBeginAnchor + qsTr("Settings", "Go to settings page") + linkPreviewEndAnchor)
        readonly property string linkPreviewEnabledForMessageNotification: qsTr("Link previews will be shown for this message. You can manage link previews in %1.").arg(linkPreviewBeginAnchor + qsTr("Settings", "Go to settings page") + linkPreviewEndAnchor)

        function getChatContentModule(chatId) {
            root.parentModule.prepareChatContentModuleForChatId(chatId)
            return root.parentModule.getChatContentModule()
        }

        function showReplyArea(messageId) {
            const obj = d.activeMessagesStore.getMessageByIdAsJson(messageId)
            if (!obj)
                return
            chatInput.showReplyArea(messageId,
                                    obj.senderDisplayName,
                                    obj.messageText,
                                    obj.contentType,
                                    obj.messageImage,
                                    obj.albumMessageImages,
                                    obj.albumImagesCount,
                                    obj.sticker)
        }

        function restoreInputReply() {
            if (!d.activeChatContentModule) {
                return
            }
            const replyMessageId = d.activeChatContentModule.inputAreaModule.preservedProperties.replyMessageId
            if (replyMessageId)
                d.showReplyArea(replyMessageId)
            else
                chatInput.resetReplyArea()
        }

        function restoreInputAttachments() {
            if (!d.activeChatContentModule) {
                return
            }
            const filesJson = d.activeChatContentModule.inputAreaModule.preservedProperties.fileUrlsAndSourcesJson
            let filesList = []
            if (filesJson) {
                try {
                    filesList = JSON.parse(filesJson)
                } catch(e) {
                    console.error("failed to parse preserved fileUrlsAndSources")
                }
            }
            chatInput.resetImageArea()
            chatInput.validateImagesAndShowImageArea(filesList)
        }

        function restoreInputState(textInput) {

            if (!d.activeChatContentModule) {
                chatInput.clear()
                chatInput.resetReplyArea()
                chatInput.resetImageArea()
                return
            }

            // Restore message text
            chatInput.setText(textInput)

            d.restoreInputReply()
            d.restoreInputAttachments()
        }

        readonly property var updateLinkPreviews: {
            if (!d.activeChatContentModule) {
                return
            }
            return Backpressure.debounce(this, 250, () => {
                                             const messageText = root.rootStore.cleanMessageText(chatInput.textInput.text)
                                             d.activeChatContentModule.inputAreaModule.setText(messageText)
                                         })
        }

        onActiveChatContentModuleChanged: {
            if (!d.activeChatContentModule) {
                return
            }
            let preservedText = ""
            preservedText = d.activeChatContentModule.inputAreaModule.preservedProperties.text

            d.activeChatContentModule.inputAreaModule.clearLinkPreviewCache()
            // Call later to make sure activeUsersStore and activeMessagesStore bindings are updated
            Qt.callLater(d.restoreInputState, preservedText)
        }
    }

    EmptyChatPanel {
        anchors.fill: parent
        visible: root.activeChatId === "" || root.chatsCount == 0
        onShareChatKeyClicked: Global.openProfilePopup(userProfile.pubKey);
    }

    // This is kind of a solution for applying backend refactored changes with the minimal qml changes.
    // The best would be if we made qml to follow the struct we have on the backend side.

    ColumnLayout {
        anchors.fill: parent
        spacing: 0

        Item {
            Layout.fillWidth: true
            Layout.fillHeight: true

            Repeater {
                id: chatRepeater
                model: parentModule && parentModule.model

                Loader {
                    width: parent.width
                    height: parent.height
                    active: model.type !== Constants.chatType.category && model.type !== Constants.chatType.unknown
                    sourceComponent: ChatContentView {
                        width: parent.width
                        height: parent.height
                        visible: !root.rootStore.openCreateChat && model.active
                        chatId: model.itemId
                        chatType: model.type
                        chatMessagesLoader.active: model.loaderActive
                        rootStore: root.rootStore
                        contactsStore: root.contactsStore
                        emojiPopup: root.emojiPopup
                        stickersPopup: root.stickersPopup
                        stickersLoaded: root.stickersLoaded
                        isBlocked: model.blocked
                        onOpenStickerPackPopup: {
                            root.openStickerPackPopup(stickerPackId)
                        }
                        onShowReplyArea: (messageId) => {
                                            d.showReplyArea(messageId)
                                        }
                        onForceInputFocus: {
                            chatInput.forceInputActiveFocus()
                        }

                        Component.onCompleted: {
                            chatContentModule = d.getChatContentModule(model.itemId)
                            chatSectionModule = root.parentModule
                            root.checkForCreateChatOptions(model.itemId)
                        }
                    }
                }
            }
        }

        RowLayout {
            Layout.fillWidth: true
            Layout.margins: Style.current.smallPadding
            Layout.preferredHeight: chatInputItem.height

            Item {
                id: chatInputItem
                Layout.fillWidth: true
                Layout.preferredHeight: chatInput.height

                StatusChatInput {
                    id: chatInput
                    width: parent.width
                    visible: !!d.activeChatContentModule
                    
                    // When `enabled` is switched true->false, `textInput.text` is cleared before d.activeChatContentModule updates.
                    // We delay the binding so that the `inputAreaModule.preservedProperties.text` doesn't get overriden with empty value.
                    Binding on enabled {
                        delayed: true
                        value: !!d.activeChatContentModule
                                 && !d.activeChatContentModule.chatDetails.blocked
                                 && root.rootStore.sectionDetails.joined
                                 && !root.rootStore.sectionDetails.amIBanned
                                 && root.rootStore.isUserAllowedToSendMessage
                                 && !d.sendingInProgress
                    }

                    store: root.rootStore
                    usersStore: d.activeUsersStore
                    linkPreviewModel: !!d.activeChatContentModule ? d.activeChatContentModule.inputAreaModule.linkPreviewModel : null
                    urlsList: d.urlsList
                    askToEnableLinkPreview: {
                        if(!d.activeChatContentModule || !d.activeChatContentModule.inputAreaModule || !d.activeChatContentModule.inputAreaModule.preservedProperties)
                            return false

                        return d.activeChatContentModule.inputAreaModule.askToEnableLinkPreview
                    }
                    textInput.placeholderText: {
                        if (!channelPostRestrictions.visible) {
                            if (d.activeChatContentModule && d.activeChatContentModule.chatDetails.blocked)
                                return qsTr("This user has been blocked.")
                            if (!root.rootStore.sectionDetails.joined || root.rootStore.sectionDetails.amIBanned) {
                                return qsTr("You need to join this community to send messages")
                            }
                            if (!root.canPost) {
                                return qsTr("Sorry, you don't have permissions to post in this channel.")
                            }
                            if (d.sendingInProgress) {
                                return qsTr("Sending...")
                            }
                            return root.rootStore.chatInputPlaceHolderText
                        } else {
                            return "";
                        }
                    }

                    emojiPopup: root.emojiPopup
                    stickersPopup: root.stickersPopup
                    chatType: root.activeChatType

                    textInput.onTextChanged: {
                        if (!!d.activeChatContentModule && textInput.text !== d.activeChatContentModule.inputAreaModule.preservedProperties.text) {
                            d.activeChatContentModule.inputAreaModule.preservedProperties.text = textInput.text
                            d.updateLinkPreviews()
                        }
                    }

                    onReplyMessageIdChanged: {
                        if (!!d.activeChatContentModule)
                            d.activeChatContentModule.inputAreaModule.preservedProperties.replyMessageId = replyMessageId
                    }

                    onFileUrlsAndSourcesChanged: {
                        if (!!d.activeChatContentModule)
                            d.activeChatContentModule.inputAreaModule.preservedProperties.fileUrlsAndSourcesJson = JSON.stringify(chatInput.fileUrlsAndSources)
                    }

                    onStickerSelected: {
                        root.rootStore.sendSticker(d.activeChatContentModule.getMyChatId(),
                                                   hashId,
                                                   chatInput.isReply ? chatInput.replyMessageId : "",
                                                   packId,
                                                   url)
                    }

                    onSendMessage: {
                        if (!d.activeChatContentModule) {
                            console.debug("error on sending message - chat content module is not set")
                            return
                        }

                        if (root.rootStore.sendMessage(d.activeChatContentModule.getMyChatId(),
                                                    event,
                                                    chatInput.getTextWithPublicKeys(),
                                                    chatInput.isReply? chatInput.replyMessageId : "",
                                                    chatInput.fileUrlsAndSources
                                                    ))
                        {
                            Global.playSendMessageSound()

                            chatInput.setText("")
                            chatInput.textInput.textFormat = TextEdit.PlainText;
                            chatInput.textInput.textFormat = TextEdit.RichText;
                        }
                    }

                    onKeyUpPress: {
                        d.activeMessagesStore.setEditModeOnLastMessage(root.rootStore.userProfileInst.pubKey)
                    }
                    
                    onLinkPreviewReloaded: (link) => d.activeChatContentModule.inputAreaModule.reloadLinkPreview(link)
                    onEnableLinkPreview: () => {
                        d.activeChatContentModule.inputAreaModule.enableLinkPreview()
                        Global.displayToastMessage(d.linkPreviewEnabledNotification, "", "show", false, Constants.ephemeralNotificationType.success, "")
                    }
                    onDisableLinkPreview: () => {
                        d.activeChatContentModule.inputAreaModule.disableLinkPreview()
                        Global.displayToastMessage(d.linkPreviewDisabledNotification, "", "hide", false, Constants.ephemeralNotificationType.danger, "")
                    }
                    onEnableLinkPreviewForThisMessage: () => {
                        d.activeChatContentModule.inputAreaModule.setLinkPreviewEnabledForCurrentMessage(true)
                        Global.displayToastMessage(d.linkPreviewEnabledForMessageNotification, "", "show", false, Constants.ephemeralNotificationType.success, "")
                    }
                    onDismissLinkPreviewSettings: () => {
                        d.activeChatContentModule.inputAreaModule.setLinkPreviewEnabledForCurrentMessage(false)
                    }
                    onDismissLinkPreview: (index) => d.activeChatContentModule.inputAreaModule.removeLinkPreviewData(index)
                }

                ChatPermissionQualificationPanel {
                    id: channelPostRestrictions
                    width: chatInput.textInput.width
                    height: chatInput.textInput.height
                    anchors.left: parent.left
                    anchors.leftMargin: (2*Style.current.bigPadding)
                    visible: (!!root.viewAndPostHoldingsModel && (root.viewAndPostHoldingsModel.count > 0)
                              && !root.amISectionAdmin && !root.canPost)
                    assetsModel: root.rootStore.assetsModel
                    collectiblesModel: root.rootStore.collectiblesModel
                    holdingsModel: root.viewAndPostHoldingsModel
                }
            }

            StatusButton {
                Layout.fillHeight: true
                Layout.maximumHeight: chatInput.implicitHeight
                verticalPadding: 0
                visible: !!d.activeChatContentModule && d.activeChatContentModule.chatDetails.blocked
                text: qsTr("Unblock")
                type: StatusBaseButton.Type.Danger
                onClicked: {
                    if (!!d.activeChatContentModule)
                        d.activeChatContentModule.unblockChat()
                }
            }
        }
    }
}