import { createRoute } from "../../../modules/api-utils/createRoute";
import { opportunities } from "../../../managers/opportunities";
import { apiResponse } from "../../../modules/api-utils/apiResponse";
import { ContentfulStatusCode } from "hono/utils/http-status";
import { authMiddleware } from "../../middleware/authorization";
import { processObjectValuePerms } from "../../../modules/permission-utils/processObjectPermissions";
import GenericError from "../../../Errors/GenericError";
import { prisma } from "../../../constants";
import { computeSubResourceCacheTTL } from "../../../modules/algorithms/computeSubResourceCacheTTL";
import { computeProductsCacheTTL } from "../../../modules/algorithms/computeProductsCacheTTL";
import {
  getCachedSite,
  getCachedNotes,
  getCachedContacts,
  getCachedProducts,
  fetchAndCacheNotes,
  fetchAndCacheContacts,
  fetchAndCacheProducts,
  fetchAndCacheSite,
} from "../../../modules/cache/opportunityCache";
import { generatedQuotes } from "../../../managers/generatedQuotes";

/* GET /v1/sales/opportunities/:identifier?include=notes,contacts,products,quotes */
export default createRoute(
  "get",
  ["/opportunities/:identifier"],
  async (c) => {
    const identifier = c.req.param("identifier");
    const includeParam = c.req.query("include") ?? "";
    const includes = new Set(
      includeParam
        .split(",")
        .map((s) => s.trim().toLowerCase())
        .filter(Boolean),
    );

    // ── Quick DB lookup (≈3ms) to get cwOpportunityId for pre-warming ──
    const isNumeric = /^\d+$/.test(identifier);
    const dbRecord = await prisma.opportunity.findFirst({
      where: isNumeric
        ? { cwOpportunityId: Number(identifier) }
        : { id: identifier },
      select: {
        cwOpportunityId: true,
        companyCwId: true,
        siteCwId: true,
        closedFlag: true,
        closedDate: true,
        expectedCloseDate: true,
        cwLastUpdated: true,
        statusCwId: true,
      },
    });

    if (!dbRecord) {
      throw new GenericError({
        message: "Opportunity not found",
        name: "OpportunityNotFound",
        cause: `No opportunity exists with identifier '${identifier}'`,
        status: 404,
      });
    }

    // Compute TTLs from DB state
    const subTtl = computeSubResourceCacheTTL({
      closedFlag: dbRecord.closedFlag,
      closedDate: dbRecord.closedDate,
      expectedCloseDate: dbRecord.expectedCloseDate,
      lastUpdated: dbRecord.cwLastUpdated,
    });
    const prodTtl = computeProductsCacheTTL({
      closedFlag: dbRecord.closedFlag,
      closedDate: dbRecord.closedDate,
      expectedCloseDate: dbRecord.expectedCloseDate,
      lastUpdated: dbRecord.cwLastUpdated,
      statusCwId: dbRecord.statusCwId,
    });

    // ── Pre-warm sub-resources only on cache miss ───────────────────────
    // Check Redis first — if the background refresh has kept the keys warm,
    // skip the CW calls entirely. Only fetch-and-cache on a miss.
    const cwOppId = dbRecord.cwOpportunityId;
    const _ignoreErrors = (p: Promise<any>) => p.catch(() => {});

    const prewarmPromises: Promise<any>[] = [];
    if (dbRecord.companyCwId && dbRecord.siteCwId) {
      const compId = dbRecord.companyCwId,
        siteId = dbRecord.siteCwId;
      prewarmPromises.push(
        _ignoreErrors(
          getCachedSite(compId, siteId).then(
            (c) => c ?? fetchAndCacheSite(compId, siteId),
          ),
        ),
      );
    }
    if (includes.has("notes") && subTtl)
      prewarmPromises.push(
        _ignoreErrors(
          getCachedNotes(cwOppId).then(
            (c) => c ?? fetchAndCacheNotes(cwOppId, subTtl),
          ),
        ),
      );
    if (includes.has("contacts") && subTtl)
      prewarmPromises.push(
        _ignoreErrors(
          getCachedContacts(cwOppId).then(
            (c) => c ?? fetchAndCacheContacts(cwOppId, subTtl),
          ),
        ),
      );
    if (includes.has("products") && prodTtl)
      prewarmPromises.push(
        _ignoreErrors(
          getCachedProducts(cwOppId).then(
            (c) => c ?? fetchAndCacheProducts(cwOppId, prodTtl),
          ),
        ),
      );

    // fetchItem runs its own CW calls (opp, activities, company) —
    // these execute concurrently with the sub-resource pre-warming above.
    const [item] = await Promise.all([
      opportunities.fetchItem(identifier),
      ...prewarmPromises,
    ]);

    // Sub-resources now hit warm Redis cache (near-instant)
    const subResourcePromises: Record<string, Promise<any>> = {
      _site: item.fetchSite(),
    };
    if (includes.has("notes")) {
      subResourcePromises.notes = item.fetchNotes();
    }
    if (includes.has("contacts")) {
      subResourcePromises.contacts = item.fetchContacts();
    }
    if (includes.has("products")) {
      subResourcePromises.products = item
        .fetchProducts()
        .then((products) => products.map((p) => p.toJson()));
    }
    if (includes.has("quotes")) {
      subResourcePromises.quotes = generatedQuotes
        .fetchByOpportunity(item.id)
        .then((quotes) => quotes.map((q) => q.toJson()));
    }

    const keys = Object.keys(subResourcePromises);
    const results = await Promise.all(keys.map((k) => subResourcePromises[k]));

    // Apply toJson after site is hydrated (side-effect from fetchSite)
    const gatedData = await processObjectValuePerms(
      item.toJson(),
      "obj.opportunity",
      c.get("user"),
    );

    const originalOpportunityNoteText = (gatedData as any).notes;

    // Attach sub-resources (skip the internal _site key)
    keys.forEach((k, i) => {
      if (k !== "_site") {
        (gatedData as any)[k] = results[i];
      }
    });

    if (includes.has("notes")) {
      (gatedData as any).opportunityNoteText =
        typeof originalOpportunityNoteText === "string"
          ? originalOpportunityNoteText
          : null;
    }

    const response = apiResponse.successful(
      "Opportunity fetched successfully!",
      gatedData,
    );
    return c.json(response, response.status as ContentfulStatusCode);
  },
  authMiddleware({ permissions: ["sales.opportunity.fetch"] }),
);