// Require utils
let base64 = require('plugins/wazuh/utils/base64.js');
import chrome from 'ui/chrome';

// Require App
let app = require('ui/modules').get('app/wazuh', []).controller('settingsController', function ($scope, $rootScope, $http, $routeParams, $route, $location, Notifier, testAPI, appState, genericReq, courier) {
    $rootScope.page = "settings";

    // Initialize
    const notify = new Notifier({ location: 'Settings' });
    let currentApiEntryIndex;
    $scope.formData = {
        user    : '',
        password: '',
        url     : ''
    };
    $scope.accept_ssl        = true;
    $scope.editConfiguration = true;
    $scope.menuNavItem       = 'settings';
    $scope.load              = true;
    $scope.extensions = {
        oscap: true,
        audit: true,
        pci:   true
    };
    $scope.addManagerContainer = false;
    $scope.submenuNavItem      = "api";
    $scope.showEditForm = {};
    $scope.formUpdate = {
        user    : null,
        password: null,
        url     : null,
        port    : null
    };

    const userRegEx  = new RegExp(/^[a-zA-Z0-9]{3,100}$/);
    const passRegEx  = new RegExp(/^.{3,100}$/);
    const urlRegEx   = new RegExp(/^https?:\/\/[a-zA-Z0-9]{1,300}$/);
    const urlRegExIP = new RegExp(/^https?:\/\/[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$/);
    const portRegEx  = new RegExp(/^[0-9]{2,5}$/);

    // Getting the index pattern list into the scope
    $scope.indexPatterns = $route.current.locals.ip

    if ($routeParams.tab){
        $scope.submenuNavItem = $routeParams.tab;
    }

    // Watch tab change
    $scope.$watch('submenuNavItem', () => {
        $location.search('tab', $scope.submenuNavItem);
    });

    // Remove API entry
    $scope.removeManager = (item) => {
        let index = $scope.apiEntries.indexOf(item);

        if (appState.getCurrentAPI() !== undefined && appState.getCurrentAPI() !== null) {
            if ($scope.apiEntries[index]._id === JSON.parse(appState.getCurrentAPI()).id) { // We are trying to remove the one selected as default
                notify.warning("Please remove another API.");
                return;
            }
        }

        genericReq.request('DELETE', `/api/wazuh-api/apiEntries/${$scope.apiEntries[index]._id}`)
        .then(() => {
            $scope.apiEntries.splice(index, 1);
            $rootScope.apiIsDown = null;            
        })
        .catch(() => {
            notify.error("Could not remove manager");
        });
    };

    // Get current API index
    $scope.getCurrentAPIIndex = () => {
        for(var i = 0; i < $scope.apiEntries.length; i += 1) {
            if($scope.apiEntries[i]._id === $scope.currentDefault) {
                currentApiEntryIndex = i;
            }
        }
    }

    // Set default API
    $scope.setDefault = (item) => {
        let index = $scope.apiEntries.indexOf(item);

        appState.setClusterInfo($scope.apiEntries[index]._source.cluster_info);

        if ($scope.apiEntries[index]._source.cluster_info.status == 'disabled')
            appState.setCurrentAPI(JSON.stringify({name: $scope.apiEntries[index]._source.cluster_info.manager, id: $scope.apiEntries[index]._id }));
        else
            appState.setCurrentAPI(JSON.stringify({name: $scope.apiEntries[index]._source.cluster_info.cluster, id: $scope.apiEntries[index]._id }));

        $scope.$emit('updateAPI', {});

        $scope.currentDefault = JSON.parse(appState.getCurrentAPI()).id;
        $scope.extensions = $scope.apiEntries[index]._source.extensions;

        notify.info(`API ${$scope.apiEntries[index]._source.cluster_info.manager} set as default`);

        $scope.getCurrentAPIIndex();

        $scope.extensions.oscap = $scope.apiEntries[index]._source.extensions.oscap;
        $scope.extensions.audit = $scope.apiEntries[index]._source.extensions.audit;
        $scope.extensions.pci = $scope.apiEntries[index]._source.extensions.pci;

        appState.setExtensions($scope.apiEntries[index]._source.extensions);

    };

    // Get settings function
    $scope.getSettings = () => {
        genericReq.request('GET', '/api/wazuh-api/apiEntries')
        .then((data) => {
            for(const entry of data.data) $scope.showEditForm[entry._id] = false;  
         
            $scope.apiEntries = data.data.length > 0 ? data.data : [];
            if (appState.getCurrentAPI() !== undefined && appState.getCurrentAPI() !== null)
                $scope.currentDefault = JSON.parse(appState.getCurrentAPI()).id;

            $scope.getCurrentAPIIndex();
            if(!currentApiEntryIndex) return;
            $scope.extensions.oscap = $scope.apiEntries[currentApiEntryIndex]._source.extensions.oscap;
            $scope.extensions.audit = $scope.apiEntries[currentApiEntryIndex]._source.extensions.audit;
            $scope.extensions.pci = $scope.apiEntries[currentApiEntryIndex]._source.extensions.pci;

            appState.setExtensions($scope.apiEntries[currentApiEntryIndex]._source.extensions);
        })
        .catch((error) => {
            notify.error("Error getting API entries " +error );
        });
    };

    const validator = formName => {
        // Validate user
        if(!userRegEx.test($scope[formName].user)){
            return 'Invalid user field';
        }

        // Validate password
        if(!passRegEx.test($scope[formName].password)){
            return 'Invalid password field';
        }

        // Validate url
        if(!urlRegEx.test($scope[formName].url) && !urlRegExIP.test($scope[formName].url)){
            return 'Invalid url field';
        }

        // Validate port
        const validatePort = parseInt($scope[formName].port);
        if(!portRegEx.test($scope[formName].port) || validatePort <= 0 || validatePort >= 99999) {
            return 'Invalid port field';
        }

        return false;
    }


    // Save settings function
    $scope.saveSettings = () => {
        const invalid = validator('formData');
        if(invalid) {
            $scope.messageError = invalid;
            return notify.error(invalid);
        }

        const tmpData = {
            user:         $scope.formData.user,
            password:     base64.encode($scope.formData.password),
            url:          $scope.formData.url,
            port:         $scope.formData.port,
            cluster_info: {},
            insecure:     'true',
            id:           (Array.isArray($scope.apiEntries)) ? $scope.apiEntries.length : 0,
            extensions:   { oscap: true, audit: true, pci: true }
        };

        testAPI.check(tmpData)
        .then((data) => {
            // API Check correct. Get Cluster info
            tmpData.cluster_info = data.data;

            // Insert new API entry
            genericReq.request('PUT', '/api/wazuh-api/settings', tmpData)
            .then((data) => {
                let newEntry = {
                    _id: data.data.response._id,
                    _source: {
                        cluster_info: tmpData.cluster_info,
                        active:       tmpData.active,
                        url:          tmpData.url,
                        api_user:     tmpData.user,
                        api_port:     tmpData.port,
                        extensions:   tmpData.extensions
                    }
                };
                $scope.apiEntries.push(newEntry);

                notify.info('Wazuh API successfully added');
                $scope.addManagerContainer = false;
                $scope.formData.user       = "";
                $scope.formData.password   = "";
                $scope.formData.url        = "";
                $scope.formData.port       = "";

                // Setting current API as default if no one is in the cookies
                if (!appState.getCurrentAPI()) { // No cookie

                    if ($scope.apiEntries[$scope.apiEntries.length - 1]._source.cluster_info.status === 'disabled')
                        appState.setCurrentAPI(JSON.stringify({name: $scope.apiEntries[$scope.apiEntries.length - 1]._source.cluster_info.manager, id: $scope.apiEntries[$scope.apiEntries.length - 1]._id }));
                    else
                        appState.setCurrentAPI(JSON.stringify({name: $scope.apiEntries[$scope.apiEntries.length - 1]._source.cluster_info.cluster, id: $scope.apiEntries[$scope.apiEntries.length - 1]._id }));

                    $scope.$emit('updateAPI', {});
                    $scope.currentDefault = JSON.parse(appState.getCurrentAPI()).id;
                }

                genericReq.request('GET', '/api/wazuh-api/fetchAgents')
                .then(() => {})
                .catch(() => {
                    notify.error("Error fetching agents");
                });

                $scope.getSettings();
            })
            .catch((error, status) => {
                if (status === '400') notify.error("Please, fill all the fields in order to connect with Wazuh RESTful API.");
                else notify.error("Some error ocurred, could not save data in elasticsearch.");
            });
        })
        .catch(error => printError(error));
    };

    $scope.isUpdating = () => {
        for(let key in $scope.showEditForm){
            if($scope.showEditForm[key]) return true;
        }
        return false;
    };

    // Update settings function
    $scope.updateSettings = item => {
        $scope.messageErrorUpdate = '';

        const invalid = validator('formUpdate');
        if(invalid) {
            $scope.messageErrorUpdate = invalid;
            return notify.error(invalid);
        }
        
        const index = $scope.apiEntries.indexOf(item);

        const tmpData = {
            user:         $scope.formUpdate.user,
            password:     base64.encode($scope.formUpdate.password),
            url:          $scope.formUpdate.url,
            port:         $scope.formUpdate.port,
            cluster_info: {},
            insecure:     'true',
            id:           $scope.apiEntries[index]._id,
            extensions:   $scope.apiEntries[index]._source.extensions
        };

        testAPI.check(tmpData)
        .then(data => {
            tmpData.cluster_info = data.data;
            return genericReq.request('PUT', '/api/wazuh-api/update-settings' , tmpData);
        })
        .then(() => {
            $scope.apiEntries[index]._source.cluster_info = tmpData.cluster_info;

            $rootScope.apiIsDown  = null;

            $scope.apiEntries[index]._source.cluster_info.cluster = tmpData.cluster_info.cluster;
            $scope.apiEntries[index]._source.cluster_info.manager = tmpData.cluster_info.manager;
            $scope.apiEntries[index]._source.url                  = tmpData.url;
            $scope.apiEntries[index]._source.api_port             = tmpData.port;
            $scope.apiEntries[index]._source.api_user             = tmpData.user;

            $scope.showEditForm[$scope.apiEntries[index]._id] = false;

            notify.info("Connection success");
        })
        .catch(error => printError(error,true));
    };

    // Check manager connectivity
    $scope.checkManager = item => {
        const index = $scope.apiEntries.indexOf(item);
        
        const tmpData = {
            user:         $scope.apiEntries[index]._source.api_user,
            password:     $scope.apiEntries[index]._source.api_password,
            url:          $scope.apiEntries[index]._source.url,
            port:         $scope.apiEntries[index]._source.api_port,
            cluster_info: {},
            insecure:     'true',
            id:           $scope.apiEntries[index]._id
        };

        testAPI
        .check(tmpData)
        .then(data => {
            tmpData.cluster_info = data.data;
            const tmpUrl       = `/api/wazuh-api/updateApiHostname/${$scope.apiEntries[index]._id}`;
            return genericReq.request('PUT', tmpUrl , { cluster_info: tmpData.cluster_info })
        })
        .then(() => {
            $scope.apiEntries[index]._source.cluster_info = tmpData.cluster_info;
            $rootScope.apiIsDown = null;
            notify.info("Connection success");
        })
        .catch(error => printError(error));
    };

    // Process form
    $scope.processForm = () => {
        $scope.messageError = "";
        $scope.saveSettings();
    };

    // Toggle extension
    $scope.toggleExtension = (extension, state) => {
        if (['oscap','audit','pci'].includes(extension)) {
            genericReq.request('PUT', `/api/wazuh-api/extension/toggle/${$scope.apiEntries[currentApiEntryIndex]._id}/${extension}/${state}`)
            .then(() => {})
            .catch(() => {
                notify.error("Invalid request when toggle extension state.");
            });

            appState.setExtensions($scope.apiEntries[currentApiEntryIndex]._source.extensions);
        }
    };

    $scope.changeIndexPattern = (newIndexPattern) => {
        genericReq.request('GET', `/api/wazuh-elastic/updatePattern/${newIndexPattern}`)
        .then((data) => {
            appState.setCurrentPattern(newIndexPattern);

            courier.indexPatterns.get(newIndexPattern)
            .then((data) => {
                let minimum = ["@timestamp", "full_log", "manager.name", "agent.id"];
                let minimumCount = 0;

                for (var i = 0; i < data.fields.length; i++) {
                    if (minimum.includes(data.fields[i].name)) {
                        minimumCount++;
                    }
                }

                if (minimumCount == minimum.length)
                    notify.info("Successfully changed the default index-pattern");
                else notify.warning("The index-pattern was changed, but it is NOT compatible with Wazuh alerts");

                $scope.selectedIndexPattern = newIndexPattern;
            });
        })
        .catch(() => {
            notify.error("Error while changing the default index-pattern");
        });
    };

    const printError = (error,updating) => {
        let text;
        switch (error.data) {
            case 'no_elasticsearch':
                text = 'Could not connect with elasticsearch in order to retrieve the credentials.';
                break;
            case 'no_credentials':
                text = 'Valid credentials not found in elasticsearch. It seems the credentials ' +
                       'were not saved.';
                break;
            case 'protocol_error':
                text = 'Invalid protocol in the API url. Please, specify <b>http://</b> or ' +
                       '<b>https://</b>.';
                break;
            case 'unauthorized':
                text = 'Credentials were found, but they are not valid.';
                break;
            case 'bad_url':
                text = 'The given URL does not contain a valid Wazuh RESTful API installation.';
                break;
            case 'self_signed':
                text = 'The request to Wazuh RESTful API was blocked, because it is using a ' +
                       'selfsigned SSL certificate. Please, enable <b>"Accept selfsigned SSL"</b> ' +
                       'option if you want to connect anyway.';
                break;
            case 'not_running':
                text = 'There are not services running in the given URL.';
                break;
            case 'request_timeout_checkstored':
                text = 'The request to /api/wazuh-api/checkStoredAPI took too long and was aborted.';
                break;
            case 'request_timeout_checkapi':
                text = 'The request to /api/wazuh-api/checkAPI took too long and was aborted.';
                break;
            case 'wrong_credentials':
                text = 'Wrong Wazuh API credentials, please check them and try again';
                break;
            case 'invalid_url':
                text = 'Wrong Wazuh API url, please check it and try again';
                break;
            case 'invalid_port':
                text = 'Wrong Wazuh API port, please check it and try again';
                break;
            case 'socket_hang_up':
                if(error.https){
                    text = 'Wrong Wazuh API protocol, please check try again with http instead https';
                } else {
                    text = 'Could not connect with Wazuh API, please check url and port and try again'
                }
                break;
            default:
                text = `Unexpected error. ${error.message || ''}`;
        }
        notify.error(text);
        if(!updating) $scope.messageError       = text;
        else          $scope.messageErrorUpdate = text;
    };

    $scope.getAppInfo = () => {
        genericReq.request('GET', '/api/wazuh-elastic/setup')
        .then((data) => {
            $scope.appInfo = {};
            $scope.appInfo["app-version"]      = data.data.data["app-version"];
            $scope.appInfo["installationDate"] = data.data.data["installationDate"];
            $scope.appInfo["revision"]         = data.data.data["revision"];
            $scope.appInfo["index-pattern"]    = data.data.data["index-pattern"];
            $scope.load = false;

            if (appState.getCurrentPattern() !== undefined && appState.getCurrentPattern() !== null) { // There's a pattern in the cookies
                $scope.selectedIndexPattern = appState.getCurrentPattern();
            } else { // There's no pattern in the cookies, pick the one in the settings
                $scope.selectedIndexPattern = data.data.data["index-pattern"];
            }
        })
        .catch(() => {
            notify.error("Error when loading Wazuh setup info");
        });
    };

    // Loading data
    $scope.getSettings();
    $scope.getAppInfo();

    
});