const {
    getAvailableRepresentationTypes
} = require("../../../../lib/domain/representation-type-policy/getAvailableRepresentationTypes");

export const APPEAL_TYPES = {
    SIPS: 846040002,
    DNS: 846040011,
    HOUSEHOLDER: 846040004,
    ADVERT: 846040018,
    EXCLUDE_QUESTIONNAIRE_1: 846040019,
    EXCLUDE_QUESTIONNAIRE_2: 846040015,
    EXCLUDE_QUESTIONNAIRE_3: 846040016
};

export const SPECIALIST_PROCESS = {
    WRITTEN_REPS: 846040000,
    HEARING: 846040001
};

export const INVOLVEMENT_TYPES = {
    LPA: 846040012
};

export const REPRESENTATION_OPTIONS = {
    QUESTIONNAIRE: "Questionnaire",
    STATEMENT: "Statement",
    FINAL_COMMENTS: "Final comments",
    CONSULTATION_RESPONSE: "Consultation Response",
    LOCAL_IMPACT_REPORT: "Local Impact Report",
    MARINE_IMPACT_REPORT: "Marine Impact Report"
};

const isValidDate = (date) =>
    date instanceof Date && !Number.isNaN(date.getTime());

const toDateOrNull = (value) => {
    const date = new Date(value);
    return isValidDate(date) ? date : null;
};

const endOfDay = (date) => {
    if (!isValidDate(date)) return null;
    const next = new Date(date);
    next.setHours(23, 59, 59, 999);
    return next;
};

const isWithinWindow = (now, start, end) => {
    if (!isValidDate(now) || !isValidDate(start) || !isValidDate(end)) {
        return false;
    }
    return now >= start && now <= end;
};

const normalizeCapacity = (value) =>
    (value || "")
        .toString()
        .toLowerCase()
        .replace(/(\band|[\s\-\+\(\)\,\&])/g, "");

export const buildRepresentationContext = ({
    detailsObj = {},
    appealType,
    specialistProcess,
    involvementType,
    selectedCapacity,
    isCaseOwner,
    isNRW,
    now = new Date()
}) => {
    const isDNS = appealType === APPEAL_TYPES.DNS;

    const startDate = toDateOrNull(
        isDNS
            ? detailsObj.pinswg_applicationacceptedasvalid
            : detailsObj.pinswg_startdate || detailsObj.pinswg_startdates
    );

    const statementDueDate = endOfDay(
        toDateOrNull(
            isDNS
                ? detailsObj.pinswg_endofrepresentationperiod
                : detailsObj.pinswg_statementduedate ||
                      detailsObj.pinswg_statementsduedate
        )
    );

    const finalCommentsDueDate = endOfDay(
        toDateOrNull(
            isDNS
                ? detailsObj.pinswg_endofrepresentationperiod
                : detailsObj.pinswg_finalcommentsduedate
        )
    );

    const capacity = normalizeCapacity(selectedCapacity);
    const isLPA = involvementType === INVOLVEMENT_TYPES.LPA;

    return {
        appealType,
        specialistProcess,
        isDNS,
        isSIPS: appealType === APPEAL_TYPES.SIPS,
        isLPA,
        isNRW: !!isNRW,
        isCaseOwner: !!isCaseOwner,
        isSelectedAppellant: capacity === "appellant",
        isSelectedAgent: capacity === "agent",
        isSelectedInterestedParty: capacity === "interestedparty",
        now,
        startDate,
        statementDueDate,
        finalCommentsDueDate
    };
};

export const buildRepsArrFromContext = (ctx) => {
    return getAvailableRepresentationTypes(ctx);
};