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import { CatalogItemDto, PathDto } from '../../../swagger/data-contracts'
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import generateUuid from '../../../utils/id/uuidGenerator'
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import { MapPoint, MapPointType, PathVariant } from '../trackingToolUtils'
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/**
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 * Cartesian product of two arrays
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 * @param sets
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 * @returns
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 */
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const cartesianProduct = (sets: CatalogItemDto[][]): CatalogItemDto[][] =>
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    sets.reduce<CatalogItemDto[][]>(
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        (results, ids) =>
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            results
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                .map((result) => ids.map((id) => [...result, id]))
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                .reduce((nested, result) => [...nested, ...result]),
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        [[]]
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    )
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/**
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 * Builds a list of all possible path variants from pathDto
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 * @param pathDto
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 * @returns
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 */
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export const buildPathVariants = (pathDto: PathDto, mapPointType: MapPointType = MapPointType.LocalCatalog): PathVariant[] => {
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    if (!pathDto.foundCatalogItems) {
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        return []
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    }
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    return (
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        pathDto.foundCatalogItems.length === 1
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            ? pathDto.foundCatalogItems
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            : cartesianProduct(pathDto.foundCatalogItems)
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    ).map((variant, _) =>
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        variant.map(
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            (catalogItem, idx) => (
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                {
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                    id: '',
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                    idx,
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                    reactId: generateUuid(),
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                    addToPath: !!catalogItem.latitude && !!catalogItem.longitude,
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                    catalogItem,
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                    type: mapPointType,
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                } as MapPoint)
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        )
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    )
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}
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export default buildPathVariants
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