// #110 - Unit tests for /promotions endpoints

import { assertEquals, assertExists } from "@std/assert";
import { mockFetch, restoreFetch } from "../helpers/api_mock.ts";
import { createMockDb } from "../helpers/db_mock.ts";
import { type Promotion, promotions } from "../helpers/fixtures.ts";

// --- Fixtures ---

Deno.test("promotions: fixtures have correct shape", () => {
  assertEquals(promotions.length, 3);
  assertEquals(typeof promotions[0].idPromo, "string");
  assertEquals(typeof promotions[0].annee, "string");
});

// --- Mock API ---

Deno.test("mock API: GET /promotions returns list", async () => {
  mockFetch({ "/promotions": promotions });
  try {
    const res = await fetch("http://localhost/api/promotions");
    assertEquals(res.status, 200);
    const data: Promotion[] = await res.json();
    assertEquals(data.length, 3);
    assertExists(data.find((p) => p.idPromo === "4AFISE25/26"));
  } finally {
    restoreFetch();
  }
});

Deno.test("mock API: GET /promotions/:id returns one", async () => {
  mockFetch({ "/promotions/4AFISE25%2F26": promotions[0] });
  try {
    const res = await fetch("http://localhost/api/promotions/4AFISE25%2F26");
    assertEquals(res.status, 200);
    const data: Promotion = await res.json();
    assertEquals(data.idPromo, "4AFISE25/26");
  } finally {
    restoreFetch();
  }
});

Deno.test("mock API: GET /promotions/:id 404 when not found", async () => {
  mockFetch({
    "/promotions/UNKNOWN": {
      status: 404,
      body: { error: "Ressource introuvable" },
    },
  });
  try {
    const res = await fetch("http://localhost/api/promotions/UNKNOWN");
    assertEquals(res.status, 404);
  } finally {
    restoreFetch();
  }
});

Deno.test("mock API: POST /promotions creates promotion (201)", async () => {
  const newPromo: Promotion = { idPromo: "NEW2025", annee: "2025" };
  mockFetch({ "/promotions": { method: "POST", status: 201, body: newPromo } });
  try {
    const res = await fetch("http://localhost/api/promotions", {
      method: "POST",
      headers: { "content-type": "application/json" },
      body: JSON.stringify({ idPromo: "NEW2025", annee: "2025" }),
    });
    assertEquals(res.status, 201);
    const data: Promotion = await res.json();
    assertEquals(data.idPromo, "NEW2025");
  } finally {
    restoreFetch();
  }
});

Deno.test("mock API: POST /promotions 400 on missing fields", async () => {
  mockFetch({ "/promotions": { method: "POST", status: 400 } });
  try {
    const res = await fetch("http://localhost/api/promotions", {
      method: "POST",
      headers: { "content-type": "application/json" },
      body: JSON.stringify({ idPromo: "NEW2025" }),
    });
    assertEquals(res.status, 400);
  } finally {
    restoreFetch();
  }
});

Deno.test("mock API: PUT /promotions/:id updates promotion", async () => {
  const updated = { idPromo: "4AFISE25/26", annee: "2026" };
  mockFetch({
    "/promotions/4AFISE25%2F26": { method: "PUT", status: 200, body: updated },
  });
  try {
    const res = await fetch("http://localhost/api/promotions/4AFISE25%2F26", {
      method: "PUT",
      headers: { "content-type": "application/json" },
      body: JSON.stringify({ annee: "2026" }),
    });
    assertEquals(res.status, 200);
    const data: Promotion = await res.json();
    assertEquals(data.annee, "2026");
  } finally {
    restoreFetch();
  }
});

Deno.test("mock API: DELETE /promotions/:id returns 204", async () => {
  mockFetch({ "/promotions/4AFISE25%2F26": { method: "DELETE", status: 204 } });
  try {
    const res = await fetch("http://localhost/api/promotions/4AFISE25%2F26", {
      method: "DELETE",
    });
    assertEquals(res.status, 204);
  } finally {
    restoreFetch();
  }
});

// --- Mock DB ---

Deno.test("mock DB: find promotion by idPromo", () => {
  const db = createMockDb({ tables: { promotions: [...promotions] } });
  const p = db.findOne<Promotion>(
    "promotions",
    (r) => r.idPromo === "4AFISE25/26",
  );
  assertExists(p);
  assertEquals(p.annee, "2025");
});

Deno.test("mock DB: insert promotion", () => {
  const db = createMockDb({ tables: { promotions: [...promotions] } });
  db.insert<Promotion>("promotions", { idPromo: "NEW2025", annee: "2025" });
  assertEquals(db.getTable("promotions").length, 4);
});

Deno.test("mock DB: update promotion annee", () => {
  const db = createMockDb({ tables: { promotions: [...promotions] } });
  db.updateWhere<Promotion>(
    "promotions",
    (p) => p.idPromo === "4AFISE25/26",
    { annee: "2026" },
  );
  assertEquals(
    db.findOne<Promotion>("promotions", (p) => p.idPromo === "4AFISE25/26")
      ?.annee,
    "2026",
  );
});

Deno.test("mock DB: delete promotion", () => {
  const db = createMockDb({ tables: { promotions: [...promotions] } });
  const count = db.deleteWhere<Promotion>(
    "promotions",
    (p) => p.idPromo === "4AFISE25/26",
  );
  assertEquals(count, 1);
  assertEquals(db.getTable("promotions").length, 2);
});