// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.

import {IntlShape} from 'react-intl';
import {Alert} from 'react-native';

import {showPermalink} from '@actions/remote/permalink';
import {Client} from '@client/rest';
import DeepLinkTypes from '@constants/deep_linking';
import DatabaseManager from '@database/manager';
import IntegrationsManager from '@managers/integrations_manager';
import NetworkManager from '@managers/network_manager';
import {getChannelById} from '@queries/servers/channel';
import {getConfig, getCurrentTeamId} from '@queries/servers/system';
import {getTeammateNameDisplay, queryUsersByUsername} from '@queries/servers/user';
import {showModal} from '@screens/navigation';
import * as DraftUtils from '@utils/draft';
import {matchDeepLink, tryOpenURL} from '@utils/url';
import {displayUsername} from '@utils/user';

import {makeDirectChannel, switchToChannelById, switchToChannelByName} from './channel';

import type {DeepLinkChannel, DeepLinkPermalink, DeepLinkDM, DeepLinkGM, DeepLinkPlugin} from '@typings/launch';

export const executeCommand = async (serverUrl: string, intl: IntlShape, message: string, channelId: string, rootId?: string) => {
    const operator = DatabaseManager.serverDatabases[serverUrl]?.operator;
    if (!operator) {
        return {error: `${serverUrl} database not found`};
    }

    let client: Client;
    try {
        client = NetworkManager.getClient(serverUrl);
    } catch (error) {
        return {error: error as ClientErrorProps};
    }

    // const config = await queryConfig(operator.database)
    // if (config.FeatureFlagAppsEnabled) {
    //     const parser = new AppCommandParser(serverUrl, intl, channelId, rootId);
    //     if (parser.isAppCommand(msg)) {
    //         return executeAppCommand(serverUrl, intl, parser);
    //     }
    // }

    const channel = await getChannelById(operator.database, channelId);
    const teamId = channel?.teamId || (await getCurrentTeamId(operator.database));

    const args: CommandArgs = {
        channel_id: channelId,
        team_id: teamId,
        root_id: rootId,
        parent_id: rootId,
    };

    let msg = filterEmDashForCommand(message);

    let cmdLength = msg.indexOf(' ');
    if (cmdLength < 0) {
        cmdLength = msg.length;
    }

    const cmd = msg.substring(0, cmdLength).toLowerCase();
    msg = cmd + msg.substring(cmdLength);

    let data;
    try {
        data = await client.executeCommand(msg, args);
    } catch (error) {
        return {error: error as ClientErrorProps};
    }

    if (data?.trigger_id) { //eslint-disable-line camelcase
        IntegrationsManager.getManager(serverUrl)?.setTriggerId(data.trigger_id);
    }

    return {data};
};

// TODO https://mattermost.atlassian.net/browse/MM-41234
// const executeAppCommand = (serverUrl: string, intl: IntlShape, parser: any) => {
//     const {call, errorMessage} = await parser.composeCallFromCommand(msg);
//     const createErrorMessage = (errMessage: string) => {
//         return {error: {message: errMessage}};
//     };

//     if (!call) {
//         return createErrorMessage(errorMessage!);
//     }

//     const res = await dispatch(doAppCall(call, AppCallTypes.SUBMIT, intl));
//     if (res.error) {
//         const errorResponse = res.error as AppCallResponse;
//         return createErrorMessage(errorResponse.error || intl.formatMessage({
//             id: 'apps.error.unknown',
//             defaultMessage: 'Unknown error.',
//         }));
//     }
//     const callResp = res.data as AppCallResponse;
//     switch (callResp.type) {
//     case AppCallResponseTypes.OK:
//         if (callResp.markdown) {
//             dispatch(postEphemeralCallResponseForCommandArgs(callResp, callResp.markdown, args));
//         }
//         return {data: {}};
//     case AppCallResponseTypes.FORM:
//     case AppCallResponseTypes.NAVIGATE:
//         return {data: {}};
//     default:
//         return createErrorMessage(intl.formatMessage({
//             id: 'apps.error.responses.unknown_type',
//             defaultMessage: 'App response type not supported. Response type: {type}.',
//         }, {
//             type: callResp.type,
//         }));
//     }
// };

const filterEmDashForCommand = (command: string): string => {
    return command.replace(/\u2014/g, '--');
};

export const handleGotoLocation = async (serverUrl: string, intl: IntlShape, location: string) => {
    const operator = DatabaseManager.serverDatabases[serverUrl]?.operator;
    if (!operator) {
        return {error: `${serverUrl} database not found`};
    }
    const {database} = operator;

    const config = await getConfig(database);
    const match = matchDeepLink(location, serverUrl, config?.SiteURL);

    if (match) {
        switch (match.type) {
            case DeepLinkTypes.CHANNEL: {
                const data = match.data as DeepLinkChannel;
                switchToChannelByName(data.serverUrl, data.channelName, data.teamName, DraftUtils.errorBadChannel, intl);
                break;
            }
            case DeepLinkTypes.PERMALINK: {
                const data = match.data as DeepLinkPermalink;
                showPermalink(serverUrl, data.teamName, data.postId, intl);
                break;
            }
            case DeepLinkTypes.DMCHANNEL: {
                const data = match.data as DeepLinkDM;
                if (!data.userName) {
                    DraftUtils.errorUnkownUser(intl);
                    return {data: false};
                }

                if (data.serverUrl !== serverUrl) {
                    if (!database) {
                        return {error: `${serverUrl} database not found`};
                    }
                }
                const user = (await queryUsersByUsername(database, [data.userName]).fetch())[0];
                if (!user) {
                    DraftUtils.errorUnkownUser(intl);
                    return {data: false};
                }

                makeDirectChannel(data.serverUrl, user.id, displayUsername(user, intl.locale, await getTeammateNameDisplay(database)), true);
                break;
            }
            case DeepLinkTypes.GROUPCHANNEL: {
                const data = match.data as DeepLinkGM;
                if (!data.channelId) {
                    DraftUtils.errorBadChannel(intl);
                    return {data: false};
                }

                switchToChannelById(data.serverUrl, data.channelId);
                break;
            }
            case DeepLinkTypes.PLUGIN: {
                const data = match.data as DeepLinkPlugin;
                showModal('PluginInternal', data.id, {link: location});
                break;
            }
        }
    } else {
        const {formatMessage} = intl;
        const onError = () => Alert.alert(
            formatMessage({
                id: 'mobile.server_link.error.title',
                defaultMessage: 'Link Error',
            }),
            formatMessage({
                id: 'mobile.server_link.error.text',
                defaultMessage: 'The link could not be found on this server.',
            }),
        );

        tryOpenURL(location, onError);
    }
    return {data: true};
};

export const fetchCommands = async (serverUrl: string, teamId: string) => {
    let client: Client;
    try {
        client = NetworkManager.getClient(serverUrl);
    } catch (error) {
        return {error: error as ClientErrorProps};
    }
    try {
        return {commands: await client.getCommandsList(teamId)};
    } catch (error) {
        return {error: error as ClientErrorProps};
    }
};

export const fetchSuggestions = async (serverUrl: string, term: string, teamId: string, channelId: string, rootId?: string) => {
    let client: Client;
    try {
        client = NetworkManager.getClient(serverUrl);
    } catch (error) {
        return {error: error as ClientErrorProps};
    }

    try {
        return {suggestions: await client.getCommandAutocompleteSuggestionsList(term, teamId, channelId, rootId)};
    } catch (error) {
        return {error: error as ClientErrorProps};
    }
};