import { expect } from "chai";
import request from "supertest";
import { createApp } from "../src/app.js";
import { prisma } from "../src/db/prisma.js";
import { syncRecipeSources } from "../src/db/recipe-source-sync.js";
import { seedReferenceData, TECH_STEPS, UTENSILS } from "../src/db/reference-seed-data.js";
import type { RecipeSourceAdapter } from "../src/lib/recipe-sources/recipe-source-adapter.js";
import {
  clearRecipeSources,
  registerRecipeSource,
} from "../src/lib/recipe-sources/recipe-source-registry.js";
import { resetDatabase } from "../test-support/reset-db.js";

/** A minimal `RecipeSourceAdapter` — only `key`/`name`/`official`/`iconUrl` matter for `syncRecipeSources` fixtures here. */
function buildFakeAdapter(
  key: string,
  name: string,
  official: boolean,
  iconUrl: string | null = null,
): RecipeSourceAdapter {
  return {
    key,
    name,
    official,
    iconUrl,
    locale: "fr",
    async list() {
      return { items: [], nextCursor: null };
    },
    async fetchDetail() {
      throw new Error("not implemented");
    },
    parse() {
      throw new Error("not implemented");
    },
  };
}

describe("Reference data", () => {
  const app = createApp();

  beforeEach(async () => {
    await resetDatabase();
  });

  after(async () => {
    await prisma.$disconnect();
  });

  describe("GET /reference/diets", () => {
    it("returns the seeded regimes, no session required", async () => {
      const res = await request(app).get("/reference/diets");

      expect(res.status).to.equal(200);
      expect(res.body).to.have.length(5);
      expect(res.body.map((d: { key: string }) => d.key)).to.include("vegetarian");
      expect(res.body[0]).to.have.keys(["id", "key"]);
    });
  });

  describe("GET /reference/allergies", () => {
    it("returns the seeded allergens with their key resolved, no session required", async () => {
      const res = await request(app).get("/reference/allergies");

      expect(res.status).to.equal(200);
      expect(res.body).to.have.length(14);
      expect(res.body.map((a: { key: string }) => a.key)).to.include("peanuts");
      expect(res.body[0]).to.have.keys(["id", "key", "kind"]);
    });

    it("classifies Gluten and Sulfites as intolerances, the rest as allergies", async () => {
      const res = await request(app).get("/reference/allergies");

      const byKey = (key: string) => res.body.find((a: { key: string }) => a.key === key);
      expect(byKey("gluten").kind).to.equal("INTOLERANCE");
      expect(byKey("sulfites").kind).to.equal("INTOLERANCE");
      expect(byKey("peanuts").kind).to.equal("ALLERGY");
      expect(res.body.filter((a: { kind: string }) => a.kind === "INTOLERANCE")).to.have.length(2);
    });
  });

  describe("GET /reference/ingredients", () => {
    it("returns the seeded ingredients, no session required", async () => {
      const res = await request(app).get("/reference/ingredients");

      expect(res.status).to.equal(200);
      expect(res.body.length).to.be.greaterThan(0);
      expect(res.body.map((i: { key: string }) => i.key)).to.include("tomato");
      expect(res.body[0]).to.have.keys([
        "id",
        "key",
        "icon",
        "category",
        "subcategory",
        "reproducible",
        "allergens",
        "diets",
        "isPlaceholder",
        "displayName",
      ]);
    });

    it("resolves each ingredient's linked allergens, empty for one with none", async () => {
      const res = await request(app).get("/reference/ingredients");

      const byKey = (key: string) => res.body.find((i: { key: string }) => i.key === key);
      expect(byKey("egg").allergens.map((a: { key: string }) => a.key)).to.include("eggs");
      expect(byKey("tomato").allergens).to.deep.equal([]);
    });
  });

  describe("GET /reference/units", () => {
    it("returns the seeded units, no session required", async () => {
      const res = await request(app).get("/reference/units");

      expect(res.status).to.equal(200);
      expect(res.body).to.have.length(17);
      expect(res.body.map((u: { key: string }) => u.key)).to.include("gram");
      expect(res.body[0]).to.have.keys(["id", "key", "type", "toBaseFactor"]);
    });

    it("resolves MASS/VOLUME toBaseFactor against their type's base unit, COUNT units all at 1", async () => {
      const res = await request(app).get("/reference/units");

      const byKey = (key: string) => res.body.find((u: { key: string }) => u.key === key);
      expect(byKey("gram")).to.include({ type: "MASS", toBaseFactor: 1 });
      expect(byKey("kilogram")).to.include({ type: "MASS", toBaseFactor: 1000 });
      expect(byKey("liter")).to.include({ type: "VOLUME", toBaseFactor: 1000 });
      expect(byKey("piece")).to.include({ type: "COUNT", toBaseFactor: 1 });
      expect(byKey("pinch")).to.include({ type: "COUNT", toBaseFactor: 1 });
      expect(byKey("cup")).to.include({ type: "VOLUME", toBaseFactor: 236.5882 });
      expect(byKey("ounce")).to.include({ type: "MASS", toBaseFactor: 28.3495 });
      expect(byKey("pound")).to.include({ type: "MASS", toBaseFactor: 453.5924 });
    });
  });

  describe("GET /reference/tech-steps", () => {
    it("returns the seeded techniques, no session required", async () => {
      const res = await request(app).get("/reference/tech-steps");

      expect(res.status).to.equal(200);
      // `TECH_STEPS.length` (reference-seed-data.ts), not a hardcoded
      // number — this catalog has grown since (26 -> 74) and will again.
      expect(res.body).to.have.length(TECH_STEPS.length);
      expect(res.body.map((t: { key: string }) => t.key)).to.include("simmer");
      expect(res.body[0]).to.have.keys(["id", "key"]);
    });

    it("orders techniques alphabetically by key", async () => {
      const res = await request(app).get("/reference/tech-steps");

      const keys = res.body.map((t: { key: string }) => t.key);
      expect(keys).to.deep.equal([...keys].sort());
    });

    it("reseeding is idempotent — no duplicate techniques", async () => {
      // resetDatabase already seeded once in beforeEach; seed a second time
      // on top of that without truncating, the way a redeploy would.
      await seedReferenceData(prisma);

      const res = await request(app).get("/reference/tech-steps");
      expect(res.body).to.have.length(TECH_STEPS.length);
    });
  });

  describe("GET /reference/utensils", () => {
    it("returns the seeded utensils, no session required", async () => {
      const res = await request(app).get("/reference/utensils");

      expect(res.status).to.equal(200);
      expect(res.body).to.have.length(UTENSILS.length);
      expect(res.body.map((u: { key: string }) => u.key)).to.include("pan");
      expect(res.body[0]).to.have.keys(["id", "key"]);
    });

    it("orders utensils alphabetically by key", async () => {
      const res = await request(app).get("/reference/utensils");

      const keys = res.body.map((u: { key: string }) => u.key);
      expect(keys).to.deep.equal([...keys].sort());
    });

    it("reseeding is idempotent — no duplicate utensils", async () => {
      await seedReferenceData(prisma);

      const res = await request(app).get("/reference/utensils");
      expect(res.body).to.have.length(UTENSILS.length);
    });
  });

  describe("GET /reference/sources", () => {
    afterEach(() => {
      clearRecipeSources();
    });

    it("is empty until a concrete adapter is registered", async () => {
      const res = await request(app).get("/reference/sources");

      expect(res.status).to.equal(200);
      expect(res.body).to.deep.equal([]);
    });

    it("returns every synced adapter, official flag and icon included, no session required", async () => {
      registerRecipeSource(buildFakeAdapter("fakeSource", "Fake Source", false));
      registerRecipeSource(
        buildFakeAdapter(
          "officialSource",
          "Official Source",
          true,
          "https://example.test/icon.svg",
        ),
      );
      await syncRecipeSources(prisma);

      const res = await request(app).get("/reference/sources");

      expect(res.status).to.equal(200);
      expect(res.body).to.have.length(2);
      expect(res.body[0]).to.have.keys(["id", "key", "name", "official", "iconUrl"]);
      const byKey = (key: string) => res.body.find((s: { key: string }) => s.key === key);
      expect(byKey("fakeSource").official).to.equal(false);
      expect(byKey("fakeSource").iconUrl).to.equal(null);
      expect(byKey("officialSource").official).to.equal(true);
      expect(byKey("officialSource").iconUrl).to.equal("https://example.test/icon.svg");
    });

    it("orders sources alphabetically by name", async () => {
      registerRecipeSource(buildFakeAdapter("bSource", "Bravo", false));
      registerRecipeSource(buildFakeAdapter("aSource", "Alpha", false));
      await syncRecipeSources(prisma);

      const res = await request(app).get("/reference/sources");

      expect(res.body.map((s: { name: string }) => s.name)).to.deep.equal(["Alpha", "Bravo"]);
    });
  });
});
