import QtQuick 2.15

import StatusQ 0.1
import StatusQ.Core.Theme 0.1
import StatusQ.Core.Utils 0.1

import AppLayouts.Wallet 1.0
import AppLayouts.Wallet.services.dapps 1.0
import AppLayouts.Wallet.services.dapps.types 1.0
import AppLayouts.Profile.stores 1.0
import shared.stores 1.0
import shared.popups.walletconnect 1.0

import SortFilterProxyModel 0.2
import utils 1.0

import "types"

QObject {
    id: root

    required property WalletConnectSDKBase wcSDK
    required property DAppsStore store
    required property WalletStore walletStore

    readonly property alias dappsModel: dappsProvider.dappsModel
    readonly property alias requestHandler: requestHandler

    readonly property var validAccounts: SortFilterProxyModel {
        sourceModel: root.walletStore ? root.walletStore.accounts : null
        filters: ValueFilter {
            roleName: "walletType"
            value: Constants.watchWalletType
            inverted: true
        }
        proxyRoles: [
            FastExpressionRole {
                name: "colorizedChainPrefixes"
                function getChainShortNames(chainIds) {
                    const chainShortNames = root.walletStore.getNetworkShortNames(chainIds)
                    return WalletUtils.colorizedChainPrefix(chainShortNames)
                }
                expression: getChainShortNames(model.preferredSharingChainIds)
                expectedRoles: ["preferredSharingChainIds"]
            }
        ]
    }
    readonly property var flatNetworks: root.walletStore ? root.walletStore.flatNetworks : null

    function pair(uri) {
        d.acceptedSessionProposal = null
        wcSDK.pair(uri)
    }

    function approvePairSession(sessionProposal, approvedChainIds, approvedAccount) {
        d.acceptedSessionProposal = sessionProposal
        let approvedNamespaces = JSON.parse(
            Helpers.buildSupportedNamespaces(approvedChainIds,
                                             [approvedAccount.address],
                                             SessionRequest.getSupportedMethods())
        )
        wcSDK.buildApprovedNamespaces(sessionProposal.params, approvedNamespaces)
    }

    function rejectPairSession(id) {
        wcSDK.rejectSession(id)
    }

    function disconnectDapp(sessionTopic) {
        wcSDK.disconnectSession(sessionTopic)
    }

    signal connectDApp(var dappChains, var sessionProposal, var approvedNamespaces)
    signal approveSessionResult(var session, var error)
    signal sessionRequest(SessionRequestResolved request)
    signal displayToastMessage(string message, bool error)

    readonly property Connections sdkConnections: Connections {
        target: wcSDK

        function onSessionProposal(sessionProposal) {
            d.currentSessionProposal = sessionProposal

            let supportedNamespacesStr = Helpers.buildSupportedNamespacesFromModels(
                root.flatNetworks, root.validAccounts, SessionRequest.getSupportedMethods())
            wcSDK.buildApprovedNamespaces(sessionProposal.params, JSON.parse(supportedNamespacesStr))
        }

        function onBuildApprovedNamespacesResult(approvedNamespaces, error) {
            if(error) {
                // TODO: error reporting
                return
            }

            if (d.acceptedSessionProposal) {
                wcSDK.approveSession(d.acceptedSessionProposal, approvedNamespaces)
            } else {
                let res = Helpers.extractChainsAndAccountsFromApprovedNamespaces(approvedNamespaces)

                root.connectDApp(res.chains, d.currentSessionProposal, approvedNamespaces)
            }
        }

        function onApproveSessionResult(session, err) {
            if (err) {
                // TODO #14676: handle the error
                console.error("Failed to approve session", err)
                return
            }

            // TODO #14754: implement custom dApp notification
            let app_url = d.currentSessionProposal ? d.currentSessionProposal.params.proposer.metadata.url : "-"
            root.displayToastMessage(qsTr("Connected to %1 via WalletConnect").arg(app_url), false)

            // Persist session
            if(!store.addWalletConnectSession(JSON.stringify(session))) {
                console.error("Failed to persist session")
            }

            // Notify client
            root.approveSessionResult(session, err)

            dappsProvider.updateDapps()
        }

        function onRejectSessionResult(err) {
            let app_url = d.currentSessionProposal ? d.currentSessionProposal.params.proposer.metadata.url : "-"
            if(err) {
                root.displayToastMessage(qsTr("Failed to reject connection request for %1").arg(app_url), true)
            } else {
                root.displayToastMessage(qsTr("Connection request for %1 was rejected").arg(app_url), false)
            }
        }

        function onSessionDelete(topic, err) {
            let app_url = d.currentSessionProposal ? d.currentSessionProposal.params.proposer.metadata.url : "-"
            if(err) {
                root.displayToastMessage(qsTr("Failed to disconnect from %1").arg(app_url), true)
            } else {
                root.displayToastMessage(qsTr("Disconnected from %1").arg(app_url), false)
            }
        }
    }

    QObject {
        id: d

        property var currentSessionProposal: null
        property var acceptedSessionProposal: null

        // TODO #14676: use it to check if already paired
        function getPairingTopicFromPairingUrl(url)
        {
            if (!url.startsWith("wc:"))
            {
                return null;
            }

            const atIndex = url.indexOf("@");
            if (atIndex < 0)
            {
                return null;
            }

            return url.slice(3, atIndex);
        }
    }

    Component.onCompleted: {
        dappsProvider.updateDapps()
    }

    DAppsRequestHandler {
        id: requestHandler

        sdk: root.wcSDK
        store: root.store
        walletStore: root.walletStore

        onSessionRequest: (request) => {
            root.sessionRequest(request)
        }
        onDisplayToastMessage: (message, error) => {
            root.displayToastMessage(message, error)
        }
    }

    DAppsListProvider {
        id: dappsProvider

        sdk: root.wcSDK
        store: root.store
    }
}