import {
    makeAutoObservable,
    runInAction,
} from "mobx";
import Dashboard from "./types/dashboard";
import Widget from "./types/widget";
import { dashboardService, metricService } from "App/services";
import { toast } from "react-toastify";
import Period, {
    LAST_24_HOURS,
    LAST_7_DAYS,
} from "Types/app/period";
import { getChartFormatter } from "Types/dashboard/helper";
import Filter from "./types/filter";
import Funnel from "./types/funnel";
import Session from "./types/session";
import Error from "./types/error";
import { FilterKey } from "Types/filter/filterType";

export default class DashboardStore {
    siteId: any = null;
    dashboards: Dashboard[] = [];
    selectedDashboard: Dashboard | null = null;
    dashboardInstance: Dashboard = new Dashboard();
    selectedWidgets: Widget[] = [];
    currentWidget: Widget = new Widget();
    widgetCategories: any[] = [];
    widgets: Widget[] = [];
    period: Record<string, any> = Period({ rangeName: LAST_24_HOURS });
    drillDownFilter: Filter = new Filter();
    drillDownPeriod: Record<string, any> = Period({ rangeName: LAST_7_DAYS });
    startTimestamp: number = 0;
    endTimestamp: number = 0;
    pendingRequests: number = 0;

    // Metrics
    metricsPage: number = 1;
    metricsPageSize: number = 10;
    metricsSearch: string = "";

    // Loading states
    isLoading: boolean = true;
    isSaving: boolean = false;
    isDeleting: boolean = false;
    loadingTemplates: boolean = false
    fetchingDashboard: boolean = false;
    sessionsLoading: boolean = false;
    showAlertModal: boolean = false;

    // Pagination
    page: number = 1
    pageSize: number = 10
    dashboardsSearch: string = ''
    sort: any = { by: 'desc'}

    constructor() {
        makeAutoObservable(this);

        this.drillDownPeriod = Period({ rangeName: LAST_7_DAYS });
        const timeStamps = this.drillDownPeriod.toTimestamps();
        this.drillDownFilter.updateKey(
            "startTimestamp",
            timeStamps.startTimestamp
        );
        this.drillDownFilter.updateKey("endTimestamp", timeStamps.endTimestamp);
    }

    get sortedDashboards() {
        const sortOrder = this.sort.by
        return [...this.dashboards].sort((a, b) => sortOrder === 'desc' ? b.createdAt - a.createdAt : a.createdAt - b.createdAt)
    }

    toggleAllSelectedWidgets(isSelected: boolean) {
        if (isSelected) {
            const allWidgets = this.widgetCategories.reduce((acc, cat) => {
                return acc.concat(cat.widgets);
            }, []);

            this.selectedWidgets = allWidgets;
        } else {
            this.selectedWidgets = [];
        }
    }

    selectWidgetsByCategory(category: string) {
        const selectedWidgetIds = this.selectedWidgets.map(
            (widget: any) => widget.metricId
        );
        const widgets = this.widgetCategories
            .find((cat) => cat.name === category)
            ?.widgets.filter(
                (widget: any) => !selectedWidgetIds.includes(widget.metricId)
            );
        this.selectedWidgets = this.selectedWidgets.concat(widgets) || [];
    }

    removeSelectedWidgetByCategory = (category: any) => {
        const categoryWidgetIds = category.widgets.map((w: Widget) => w.metricId);
        this.selectedWidgets = this.selectedWidgets.filter(
            (widget: any) => !categoryWidgetIds.includes(widget.metricId)
        );
    };

    toggleWidgetSelection = (widget: any) => {
        const selectedWidgetIds = this.selectedWidgets.map(
            (widget: any) => widget.metricId
        );
        if (selectedWidgetIds.includes(widget.metricId)) {
            this.selectedWidgets = this.selectedWidgets.filter(
                (w: any) => w.metricId !== widget.metricId
            );
        } else {
            this.selectedWidgets.push(widget);
        }
    };

    findByIds(ids: string[]) {
        return this.dashboards.filter((d) => ids.includes(d.dashboardId));
    }

    initDashboard(dashboard?: Dashboard) {
        this.dashboardInstance = dashboard
            ? new Dashboard().fromJson(dashboard)
            : new Dashboard();
        this.selectedWidgets = [];
    }

    updateKey(key: string, value: any) {
        // @ts-ignore
        this[key] = value;
    }

    resetCurrentWidget() {
        this.currentWidget = new Widget();
    }

    editWidget(widget: any) {
        this.currentWidget.update(widget);
    }

    fetchList(): Promise<any> {
        this.isLoading = true;

        return dashboardService
            .getDashboards()
            .then((list: any) => {
                runInAction(() => {
                    this.dashboards = list.map((d: Record<string, any>) =>
                        new Dashboard().fromJson(d)
                    );
                });
            })
            .finally(() => {
                runInAction(() => {
                    this.isLoading = false;
                });
            });
    }

    fetch(dashboardId: string): Promise<any> {
        this.setFetchingDashboard(true);
        return dashboardService
            .getDashboard(dashboardId)
            .then((response) => {
                this.selectedDashboard?.update({
                    widgets: new Dashboard().fromJson(response).widgets,
                });
            })
            .finally(() => {
                this.setFetchingDashboard(false);
            });
    }

    setFetchingDashboard(value: boolean) {
        this.fetchingDashboard = value;
    }

    save(dashboard: Dashboard): Promise<any> {
        this.isSaving = true;
        const isCreating = !dashboard.dashboardId;

        dashboard.metrics = this.selectedWidgets.map((w) => w.metricId);

        return new Promise((resolve, reject) => {
            dashboardService
                .saveDashboard(dashboard)
                .then((_dashboard) => {
                    runInAction(() => {
                        if (isCreating) {
                            toast.success("Dashboard created successfully");
                            this.addDashboard(
                                new Dashboard().fromJson(_dashboard)
                            );
                        } else {
                            toast.success("Dashboard successfully updated ");
                            this.updateDashboard(
                                new Dashboard().fromJson(_dashboard)
                            );
                        }
                        resolve(_dashboard);
                    });
                })
                .catch((error) => {
                    toast.error("Error saving dashboard");
                    reject();
                })
                .finally(() => {
                    runInAction(() => {
                        this.isSaving = false;
                    });
                });
        });
    }

    saveMetric(metric: Widget, dashboardId: string): Promise<any> {
        const isCreating = !metric.widgetId;
        return dashboardService
            .saveMetric(metric, dashboardId)
            .then((metric) => {
                runInAction(() => {
                    if (isCreating) {
                        this.selectedDashboard?.widgets.push(metric);
                    } else {
                        this.selectedDashboard?.widgets.map((w) => {
                            if (w.widgetId === metric.widgetId) {
                                w.update(metric);
                            }
                        });
                    }
                });
            });
    }

    deleteDashboard(dashboard: Dashboard): Promise<any> {
        this.isDeleting = true;
        return dashboardService
            .deleteDashboard(dashboard.dashboardId)
            .then(() => {
                toast.success("Dashboard deleted successfully");
                runInAction(() => {
                    this.removeDashboard(dashboard);
                });
            })
            .catch(() => {
                toast.error("Dashboard could not be deleted");
            })
            .finally(() => {
                runInAction(() => {
                    this.isDeleting = false;
                });
            });
    }

    toJson() {
        return {
            dashboards: this.dashboards.map((d) => d.toJson()),
        };
    }

    fromJson(json: any) {
        runInAction(() => {
            this.dashboards = json.dashboards.map((d: Record<string, any>) =>
                new Dashboard().fromJson(d)
            );
        });
        return this;
    }

    addDashboard(dashboard: Dashboard) {
        this.dashboards.push(new Dashboard().fromJson(dashboard));
    }

    removeDashboard(dashboard: Dashboard) {
        this.dashboards = this.dashboards.filter(
            (d) => d.dashboardId !== dashboard.dashboardId
        );
    }

    getDashboard(dashboardId: string|number): Dashboard | null {
        return (
            this.dashboards.find((d) => d.dashboardId == dashboardId) || null
        );
    }

    getDashboardByIndex(index: number) {
        return this.dashboards[index];
    }

    getDashboardCount() {
        return this.dashboards.length;
    }

    updateDashboard(dashboard: Dashboard) {
        const index = this.dashboards.findIndex(
            (d) => d.dashboardId === dashboard.dashboardId
        );
        if (index >= 0) {
            this.dashboards[index] = dashboard;
            if (this.selectedDashboard?.dashboardId === dashboard.dashboardId) {
                this.selectDashboardById(dashboard.dashboardId);
            }
        }
    }

    selectDashboardById = (dashboardId: any) => {
        this.selectedDashboard =
            this.dashboards.find((d) => d.dashboardId == dashboardId) ||
            new Dashboard();
    };

    getDashboardById = (dashboardId: string) => {
        const dashboard = this.dashboards.find((d) => d.dashboardId == dashboardId)

        if (dashboard) {
            this.selectedDashboard = dashboard
            return true;
        } else {
            this.selectedDashboard = null
            return false;
        }
    }

    setSiteId = (siteId: any) => {
        this.siteId = siteId;
    };

    fetchTemplates(hardRefresh: boolean): Promise<any> {
        this.loadingTemplates = true
        return new Promise((resolve, reject) => {
            if (this.widgetCategories.length > 0 && !hardRefresh) {
                resolve(this.widgetCategories);
            } else {
                metricService
                    .getTemplates()
                    .then((response) => {
                        const categories: any[] = [];
                        response.forEach((category: any) => {
                            const widgets: any[] = [];
                            category.widgets
                                .forEach((widget: any) => {
                                    const w = new Widget().fromJson(widget);
                                    widgets.push(w);
                                });
                            const c: any = {};
                            c.widgets = widgets;
                            c.name = category.category;
                            c.description = category.description;
                            categories.push(c);
                        });
                        this.widgetCategories = categories;
                        resolve(this.widgetCategories);
                    })
                    .catch((error) => {
                        reject(error);
                    }).finally(() => {
                        this.loadingTemplates = false
                    });
            }
        });
    }

    deleteDashboardWidget(dashboardId: string, widgetId: string) {
        this.isDeleting = true;
        return dashboardService
            .deleteWidget(dashboardId, widgetId)
            .then(() => {
                toast.success("Dashboard updated successfully");
                runInAction(() => {
                    this.selectedDashboard?.removeWidget(widgetId);
                });
            })
            .finally(() => {
                this.isDeleting = false;
            });
    }

    addWidgetToDashboard(dashboard: Dashboard, metricIds: any): Promise<any> {
        this.isSaving = true;
        return dashboardService
            .addWidget(dashboard, metricIds)
            .then((response) => {
                toast.success("Metric added to dashboard.");
            })
            .catch(() => {
                toast.error("Metric could not be added.");
            })
            .finally(() => {
                this.isSaving = false;
            });
    }

    setPeriod(period: any) {
        this.period = Period({
            start: period.start,
            end: period.end,
            rangeName: period.rangeName,
        });
    }

    setDrillDownPeriod(period: any) {
        this.drillDownPeriod = Period({
            start: period.start,
            end: period.end,
            rangeName: period.rangeName,
        });
    }

    fetchMetricChartData(
        metric: Widget,
        data: any,
        isWidget: boolean = false,
        period: Record<string, any>
    ): Promise<any> {
        period = period.toTimestamps();
        const params = { ...period, ...data, key: metric.predefinedKey };


        if (metric.page && metric.limit) {
            params["page"] = metric.page;
            params["limit"] = metric.limit;
        }

        return new Promise((resolve, reject) => {
            this.pendingRequests += 1
            return metricService
                .getMetricChartData(metric, params, isWidget)
                .then((data: any) => {
                    if (
                        metric.metricType === "predefined" &&
                        metric.viewType === "overview"
                    ) {
                        const _data = {
                            ...data,
                            chart: getChartFormatter(period)(data.chart),
                        };
                        metric.setData(_data);
                        resolve(_data);
                    } else if (metric.metricType === "funnel") {
                        const _data = { ...data };
                        _data.funnel = new Funnel().fromJSON(data);
                        metric.setData(_data);
                        resolve(_data);
                    } else {
                        const _data = {
                            ...data,
                        };

                        // TODO refactor to widget class
                        if (metric.metricOf === FilterKey.SESSIONS) {
                            _data["sessions"] = data.sessions.map((s: any) =>
                                new Session().fromJson(s)
                            );
                        } else if (metric.metricOf === FilterKey.ERRORS) {
                            _data["errors"] = data.errors.map((s: any) =>
                                new Error().fromJSON(s)
                            );
                        } else {
                            if (data.hasOwnProperty("chart")) {
                                _data["chart"] = getChartFormatter(period)(
                                    data.chart
                                );
                                _data["namesMap"] = data.chart
                                    .map((i: any) => Object.keys(i))
                                    .flat()
                                    .filter(
                                        (i: any) => i !== "time" && i !== "timestamp"
                                    )
                                    .reduce((unique: any, item: any) => {
                                        if (!unique.includes(item)) {
                                            unique.push(item);
                                        }
                                        return unique;
                                    }, []);
                            } else {
                                _data["chart"] = getChartFormatter(period)(
                                    Array.isArray(data) ? data : []
                                );
                                _data["namesMap"] = Array.isArray(data)
                                    ? data
                                          .map((i) => Object.keys(i))
                                          .flat()
                                          .filter(
                                              (i) =>
                                                  i !== "time" &&
                                                  i !== "timestamp"
                                          )
                                          .reduce((unique: any, item: any) => {
                                              if (!unique.includes(item)) {
                                                  unique.push(item);
                                              }
                                              return unique;
                                          }, [])
                                    : [];
                            }
                        }
                        metric.setData(_data);
                        resolve(_data);
                    }
                })
                .catch((err: any) => {
                    reject(err);
                }).finally(() => {
                    setTimeout(() => {
                        this.pendingRequests = this.pendingRequests - 1
                    }, 100)
                });
        });
    }
}