// (C) 2007-2019 GoodData Corporation
import { has, flatMap } from "lodash";
import { ISchemaAttributeFilter } from "../model/SchemaAttributeFilter";
import { ISchemaDateFilter } from "../model/SchemaDateFilter";
import { getProjectId } from "../../model/Project";
import { IAttributeFilter, IDateFilter, IFilterContext } from "../../model/FilterContext";
import { webalize } from "../../utils/string";
import { objectUri } from "../../route/routes";
import { ISchema } from "../model/Schema";
import { createProject } from "./ProjectBuilder";

function getAttributeFilter(filter: ISchemaAttributeFilter): IAttributeFilter {
    return { ...filter };
}

function getDateFilter(filter: ISchemaDateFilter): IDateFilter {
    return { ...filter };
}

export type Filter = ISchemaAttributeFilter | ISchemaDateFilter;

function getFilters(filters: Filter[]): Filter[] {
    return filters.map(filter => {
        if (has(filter, "attributeFilter")) {
            return getAttributeFilter(filter as ISchemaAttributeFilter);
        }

        return getDateFilter(filter as ISchemaDateFilter);
    });
}

export function createFilterContexts(schema: ISchema): IFilterContext[] {
    const project = createProject(schema);
    const filterContexts = flatMap(
        schema.analyticalDashboards || [],
        analyticalDashboard => analyticalDashboard.filterContext || [],
    );

    return filterContexts.map(filterContext => {
        const identifier = webalize(filterContext.title);
        return {
            meta: {
                identifier,
                title: filterContext.title,
                uri: objectUri(getProjectId(project), identifier),
                category: "filterContext",
            },
            content: {
                filters: getFilters(filterContext.filters),
            },
        };
    });
}