import slugify from "./slugify";

export default function uniqueByKey<T extends { [k: string]: any } = any>(
    arr: T[],
    key: keyof T | (keyof T)[]
) {
    let newArray = [] as T[];
    let uniqueValues = [] as string[];

    for (let i = 0; i < arr.length; i++) {
        const item = arr[i];

        let targetValue: string | undefined;

        if (Array.isArray(key)) {
            const targetVals: string[] = [];

            for (let k = 0; k < key.length; k++) {
                const ky = key[k];
                const targetValuek = slugify(String(item[ky]));
                targetVals.push(targetValuek);
            }
            targetValue = slugify(targetVals.join(","));
        } else {
            targetValue = slugify(String(item[key]));
        }

        if (!targetValue) continue;

        if (uniqueValues.includes(targetValue)) continue;
        newArray.push(item);
        uniqueValues.push(targetValue);
    }

    return newArray;
}