// Unit tests for /ue-modules endpoints — fixtures, mock API, mock DB

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

// --- Fixtures ---

Deno.test("ue_modules: fixtures have correct shape", () => {
  assertEquals(ueModules.length, 3);
  assertEquals(typeof ueModules[0].idModule, "string");
  assertEquals(typeof ueModules[0].idUE, "number");
  assertEquals(typeof ueModules[0].idPromo, "string");
  assertEquals(typeof ueModules[0].coeff, "number");
});

// --- Mock API ---

Deno.test("mock API: GET /ue-modules returns list", async () => {
  mockFetch({ "/ue-modules": ueModules });
  try {
    const res = await fetch("http://localhost/api/ue-modules");
    assertEquals(res.status, 200);
    const data: UeModule[] = await res.json();
    assertEquals(data.length, 3);
  } finally {
    restoreFetch();
  }
});

Deno.test("mock API: GET /ue-modules?idPromo filters by promo", async () => {
  const filtered = ueModules.filter((u) => u.idPromo === "4AFISE25/26");
  mockFetch({ "/ue-modules": filtered });
  try {
    const res = await fetch("http://localhost/api/ue-modules?idPromo=4AFISE25%2F26");
    const data: UeModule[] = await res.json();
    assertEquals(data.length, 2);
    assertEquals(data.every((u) => u.idPromo === "4AFISE25/26"), true);
  } finally {
    restoreFetch();
  }
});

Deno.test("mock API: GET /ue-modules?idUE filters by UE", async () => {
  const filtered = ueModules.filter((u) => u.idUE === 1);
  mockFetch({ "/ue-modules": filtered });
  try {
    const res = await fetch("http://localhost/api/ue-modules?idUE=1");
    const data: UeModule[] = await res.json();
    assertEquals(data.length, 2);
    assertEquals(data.every((u) => u.idUE === 1), true);
  } finally {
    restoreFetch();
  }
});

Deno.test("mock API: POST /ue-modules creates association (201)", async () => {
  const newUeModule: UeModule = { idModule: "JIN705C", idUE: 2, idPromo: "3AFISE25/26", coeff: 3.0 };
  mockFetch({ "/ue-modules": { method: "POST", status: 201, body: newUeModule } });
  try {
    const res = await fetch("http://localhost/api/ue-modules", {
      method: "POST",
      headers: { "content-type": "application/json" },
      body: JSON.stringify(newUeModule),
    });
    assertEquals(res.status, 201);
    const data: UeModule = await res.json();
    assertEquals(data.idModule, "JIN705C");
    assertEquals(data.coeff, 3.0);
  } finally {
    restoreFetch();
  }
});

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

Deno.test("mock API: GET /ue-modules/:idModule/:idUE/:idPromo returns association (employee)", async () => {
  mockFetch({ "/ue-modules/JIN702C/1/4AFISE25": ueModules[0] });
  try {
    const res = await fetch("http://localhost/api/ue-modules/JIN702C/1/4AFISE25%2F26");
    assertEquals(res.status, 200);
    const data: UeModule = await res.json();
    assertEquals(data.coeff, 3.0);
  } finally {
    restoreFetch();
  }
});

Deno.test("mock API: GET /ue-modules/:idModule/:idUE/:idPromo 403 for non-employee", async () => {
  mockFetch({ "/ue-modules/JIN702C/1/4AFISE25": { status: 403 } });
  try {
    const res = await fetch("http://localhost/api/ue-modules/JIN702C/1/4AFISE25%2F26");
    assertEquals(res.status, 403);
  } finally {
    restoreFetch();
  }
});

Deno.test("mock API: PUT /ue-modules/:idModule/:idUE/:idPromo updates coeff", async () => {
  const updated: UeModule = { ...ueModules[0], coeff: 5.0 };
  mockFetch({ "/ue-modules/JIN702C/1/4AFISE25": { method: "PUT", status: 200, body: updated } });
  try {
    const res = await fetch("http://localhost/api/ue-modules/JIN702C/1/4AFISE25%2F26", {
      method: "PUT",
      headers: { "content-type": "application/json" },
      body: JSON.stringify({ coeff: 5.0 }),
    });
    assertEquals(res.status, 200);
    const data: UeModule = await res.json();
    assertEquals(data.coeff, 5.0);
  } finally {
    restoreFetch();
  }
});

Deno.test("mock API: DELETE /ue-modules/:idModule/:idUE/:idPromo returns 204", async () => {
  mockFetch({ "/ue-modules/JIN702C/1/4AFISE25": { method: "DELETE", status: 204 } });
  try {
    const res = await fetch("http://localhost/api/ue-modules/JIN702C/1/4AFISE25%2F26", { method: "DELETE" });
    assertEquals(res.status, 204);
  } finally {
    restoreFetch();
  }
});

// --- Mock DB ---

Deno.test("mock DB: find ue-module by composite key", () => {
  const db = createMockDb({ tables: { ueModules: [...ueModules] } });
  const u = db.findOne<UeModule>("ueModules", (u) => u.idModule === "JIN702C" && u.idUE === 1 && u.idPromo === "4AFISE25/26");
  assertExists(u);
  assertEquals(u.coeff, 3.0);
});

Deno.test("mock DB: filter ue-modules by promo", () => {
  const db = createMockDb({ tables: { ueModules: [...ueModules] } });
  const rows = db.findMany<UeModule>("ueModules", (u) => u.idPromo === "4AFISE25/26");
  assertEquals(rows.length, 2);
});

Deno.test("mock DB: insert ue-module", () => {
  const db = createMockDb({ tables: { ueModules: [...ueModules] } });
  db.insert<UeModule>("ueModules", { idModule: "JIN705C", idUE: 2, idPromo: "3AFISE25/26", coeff: 1.5 });
  assertEquals(db.getTable("ueModules").length, 4);
});

Deno.test("mock DB: update ue-module coeff", () => {
  const db = createMockDb({ tables: { ueModules: [...ueModules] } });
  db.updateWhere<UeModule>("ueModules", (u) => u.idModule === "JIN702C" && u.idUE === 1, { coeff: 6.0 });
  assertEquals(
    db.findOne<UeModule>("ueModules", (u) => u.idModule === "JIN702C" && u.idUE === 1)?.coeff,
    6.0,
  );
});

Deno.test("mock DB: delete ue-module", () => {
  const db = createMockDb({ tables: { ueModules: [...ueModules] } });
  db.deleteWhere<UeModule>("ueModules", (u) => u.idModule === "JIN702C" && u.idUE === 1);
  assertEquals(db.getTable("ueModules").length, 2);
});