import { readFileSync } from "node:fs";
import path from "node:path";
import { describe, expect, it } from "vitest";
import { DECK_IDS } from "../../lib/create/deckTypes";
import type { DeckId, RecommendedCard } from "../../lib/create/deckTypes";
import { deckData, recommendDeck } from "../../lib/create/deckRecommend";
import { variantsOf } from "../../lib/create/reviewProfiles";
import type { ReviewProfile } from "../../lib/create/reviewProfiles";
import { methodSlugFromTitle } from "../../lib/create/methodSlugFromTitle";
import { resolveMethodId } from "../../lib/create/idAliases";
import useCasesCompletedRules from "../../messages/en/pages/useCasesCompletedRules.json";

const ROOT = path.resolve(__dirname, "..", "..");

function readJson<T>(rel: string): T {
  return JSON.parse(readFileSync(path.join(ROOT, rel), "utf8")) as T;
}

const profiles = readJson<ReviewProfile[]>("data/create/profiles/real-group-profiles.json");
const founders = readJson<ReviewProfile[]>("data/create/profiles/one-member-founders.json");

function compact(card: RecommendedCard) {
  const reason =
    card.reason.kind === "added"
      ? `added:${card.reason.answer}`
      : card.reason.kind === "opened"
        ? `opened:${card.reason.answer}`
        : card.reason.answer
          ? `fit+${card.reason.answer}`
          : "fit";
  return {
    id: card.id,
    tag: card.tag,
    tier: card.tier,
    reason,
    ...(card.decidedBy ? { decidedBy: card.decidedBy } : {}),
    ...(card.alternative ? { alternative: card.alternative } : {}),
  };
}

function picksFor(set: ReviewProfile[]) {
  return set.flatMap(variantsOf).map((variant) => ({
    profile: variant.profile,
    variant: variant.variant,
    decks: Object.fromEntries(
      DECK_IDS.map((deck) => {
        const result = recommendDeck(deckData(deck), variant.answers);
        return [
          deck,
          {
            shown: result.shown.map(compact),
            waiting: result.waiting.map((card) => card.id),
          },
        ];
      }),
    ),
  }));
}

function rowOrderSentence(set: ReviewProfile[]): string {
  const base = set.flatMap(variantsOf).filter((variant) => variant.variant === "base");
  const totals = { only: 0, score: 0, otherKinds: 0, rowOrder: 0 };
  for (const deck of DECK_IDS) {
    const jobs = deckData(deck).engine.jobs.filter((job) => job.displayTier !== "none");
    for (const job of jobs) {
      for (const variant of base) {
        const winner = recommendDeck(deckData(deck), variant.answers).recommended.find(
          (card) => card.job === job.id && card.tier !== "answers",
        );
        if (winner?.decidedBy) totals[winner.decidedBy] += 1;
      }
    }
  }
  const picks = totals.only + totals.score + totals.otherKinds + totals.rowOrder;
  return `Of ${picks} picks for the 92 groups, row order settled ${totals.rowOrder}, other kinds ${totals.otherKinds} and fit ${totals.score}, and ${totals.only} had one eligible card.`;
}

const EXAMPLE_DECK_BY_CATEGORY: Record<string, DeckId> = {
  Membership: "membership",
  "Decision-Making": "decisionApproaches",
  "Decision-making": "decisionApproaches",
  "Conflict Management": "conflictManagement",
  Communication: "communication",
};

function chosenCards(documentKey: string): { total: number; ids: string[] } {
  const doc = (
    useCasesCompletedRules as Record<
      string,
      { document: { sections: { categoryName: string; entries: { title: string }[] }[] } }
    >
  )[documentKey];
  const live = new Map(
    DECK_IDS.map((deck) => [deck, new Set(Object.keys(deckData(deck).engine.cards))]),
  );
  let total = 0;
  const ids: string[] = [];
  for (const section of doc.document.sections) {
    const deck = EXAMPLE_DECK_BY_CATEGORY[section.categoryName];
    if (!deck) continue;
    for (const entry of section.entries) {
      total += 1;
      const slug = methodSlugFromTitle(entry.title);
      const resolved = resolveMethodId(deck, slug);
      if (resolved && live.get(resolved.deck)?.has(resolved.id)) ids.push(resolved.id);
    }
  }
  return { total, ids };
}

describe("real-group profiles", () => {
  it("matches the reviewed 2 Nov package run", () => {
    const expected = readJson<{ picks: unknown[] }>("tests/fixtures/profiles-picks.json");
    expect(picksFor([...profiles, ...founders])).toEqual(expected.picks);
  });

  it("reports how often row order settled a pick", () => {
    const summary = readFileSync(
      path.join(ROOT, "tests/fixtures/profiles-summary.md"),
      "utf8",
    );
    expect(summary).toContain(rowOrderSentence(profiles));
    expect(profiles).toHaveLength(92);
    expect(founders.length).toBeGreaterThan(0);
    expect(JSON.stringify(profiles)).not.toMatch(/[A-Z][a-z]+ [A-Z][a-z]+/);
    expect(JSON.stringify(founders)).not.toMatch(/[A-Z][a-z]+ [A-Z][a-z]+/);
  });

  it("counts how many example-rule cards the engine recommends", () => {
    const base = profiles.flatMap(variantsOf).filter((variant) => variant.variant === "base");
    const report: Record<string, { chosen: number; resolved: number; recommendedOnMost: number }> = {};
    for (const key of ["mutualAidColorado", "foodNotBombs", "boulderCountyStreetMedics"] as const) {
      const chosen = chosenCards(key);
      let best = 0;
      for (const variant of base) {
        const recommended = new Set<string>();
        for (const deck of DECK_IDS) {
          for (const card of recommendDeck(deckData(deck), variant.answers).recommended) {
            recommended.add(card.id);
          }
        }
        let hit = 0;
        for (const id of chosen.ids) if (recommended.has(id)) hit += 1;
        if (hit > best) best = hit;
      }
      report[key] = {
        chosen: chosen.total,
        resolved: chosen.ids.length,
        recommendedOnMost: best,
      };
    }
    // The team's own Rule is not in the repo, so this locks the three example
    // Rules. A change that moves a recommendation changes recommendedOnMost.
    expect(report).toEqual({
      mutualAidColorado: { chosen: 7, resolved: 6, recommendedOnMost: 4 },
      foodNotBombs: { chosen: 8, resolved: 8, recommendedOnMost: 5 },
      boulderCountyStreetMedics: { chosen: 9, resolved: 8, recommendedOnMost: 5 },
    });
  });
});