// (C) 2007-2019 GoodData Corporation
import { flatMap } from "lodash";
import { ensureItems } from "../helpers/objects";
import { ISchema } from "../model/Schema";
import { createProject } from "./ProjectBuilder";
import { createDateDataSet } from "./DateDataSetBuilder";
import { DateRange } from "../../utils/model/DateRange";

export type DateRangesMap = Map<string, DateRange>;

export function createDateRangesMap(schema: ISchema): DateRangesMap {
    const project = createProject(schema);
    const groups = ensureItems(schema.groups);
    const dateDataSets = flatMap(groups, group => ensureItems(group.dateDataSets));

    return dateDataSets.reduce((map, dateDataSetSchema) => {
        const dateDataSet = createDateDataSet(project, dateDataSetSchema);
        const { startDate, finalDate } = dateDataSetSchema;

        return map.set(dateDataSet.meta.identifier, new DateRange(startDate, finalDate));
    }, new Map<string, DateRange>());
}