// lib/newappeal/loadNewAppealPage.js
import { getSession } from "next-auth/react";
import {
    getAppealsTypesForNewAppeal,
    getMandatoryFields,
    getPickLists
} from "../../actions/services/referenceDataService";
import { getProgressFromBlob } from "../../actions/services/documentService";
import { getPersonalAccount } from "../../actions/services/accountService";
import { consoleLogger, getIP } from "../../actions/core/logger";
import { readFormXml } from "../forms/readFormXml";
import { requireQueryParams } from "../routing/requireQueryParams";

/**
 * Loads everything needed for New Appeal SSR.
 * Returns { redirect } on auth/query issues, otherwise returns a data object.
 */
export async function loadNewAppealPage(ctx) {
    const { query, req } = ctx;

    // Preserve existing behaviour
    getIP(req);

    // Validate required params early (adjust keys if needed)
    const required = requireQueryParams(query, ["appealtypes", "apt", "id"]);
    if (!required.ok) {
        return { redirect: required.redirect };
    }

    const session = await getSession(ctx);
    if (!session) {
        consoleLogger({
            name: "NewAppealLoaderAuthGuard",
            reasonCode: "NO_SESSION",
            message: "loadNewAppealPage missing session; redirecting to signin"
        });
        return {
            redirect: {
                destination: "/auth/signin",
                permanent: false
            }
        };
    }

    if (!session?.user?.id || !session?.user?.email) {
        consoleLogger({
            name: "NewAppealLoaderAuthGuard",
            reasonCode: "NO_SESSION_USER",
            message:
                "loadNewAppealPage missing session user identity; redirecting to signin",
            hasSessionUserId: !!session?.user?.id,
            hasSessionUserEmail: !!session?.user?.email
        });
        return {
            redirect: {
                destination: "/auth/signin",
                permanent: false
            }
        };
    }

    const { cookies } = req;
    const loggedInUser = cookies?.pinsUser; // existing cookie usage
    const loggedInUserIdent = session.user.id;
    const loggedInUserEmail = session.user.email;

    if (!loggedInUser) {
        consoleLogger({
            name: "NewAppealLoaderAuthGuard",
            reasonCode: "NO_PINSUSER_COOKIE",
            message:
                "loadNewAppealPage missing pinsUser cookie identity; redirecting to signin"
        });
        return {
            redirect: {
                destination: "/auth/signin",
                permanent: false
            }
        };
    }

    let appealTypeData;
    let mandatoryFieldsData;
    let pickListData;
    let blobProgress;
    let accountDetails;

    try {
        [
            appealTypeData,
            mandatoryFieldsData,
            pickListData,
            blobProgress,
            accountDetails
        ] = await Promise.all([
            getAppealsTypesForNewAppeal(),
            getMandatoryFields(query.appealtypes),
            getPickLists(query.appealtypes),
            getProgressFromBlob(loggedInUserIdent, query.id),
            getPersonalAccount(loggedInUser)
        ]);
    } catch (_error) {
        consoleLogger({
            name: "NewAppealLoaderDependencyFailure",
            message:
                "loadNewAppealPage dependency fetch failed; redirecting to /myportal",
            appealType: query?.appealtypes,
            hasCaseId: !!query?.id,
            error: _error?.message
        });
        return {
            redirect: {
                destination: "/myportal",
                permanent: false
            }
        };
    }

    let xmlStr = "";
    try {
        xmlStr = readFormXml(query.appealtypes).xmlStr;
    } catch (_error) {
        consoleLogger({
            name: "NewAppealLoaderXmlReadFailure",
            message:
                "loadNewAppealPage XML read failed; redirecting to /myportal",
            appealType: query?.appealtypes,
            error: _error?.message
        });
        return {
            redirect: {
                destination: "/myportal",
                permanent: false
            }
        };
    }

    return {
        session,
        loggedInUser,
        loggedInUserIdent,
        loggedInUserEmail,
        appealTypeData,
        mandatoryFieldsData,
        pickListData,
        blobProgress,
        accountDetails,
        xmlStr
    };
}