// Unit tests for /enseignements 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 { enseignements } from "../helpers/fixtures.ts";

interface Enseignement {
  idProf: string;
  idModule: string;
  idPromo: string;
}

// --- Fixtures ---

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

// --- Mock API ---

Deno.test("mock API: POST /enseignements creates enseignement (201) as employee", async () => {
  const newEns: Enseignement = {
    idProf: "prof.dupont",
    idModule: "JIN702C",
    idPromo: "4AFISE25/26",
  };
  mockFetch({
    "/enseignements": { method: "POST", status: 201, body: newEns },
  });
  try {
    const res = await fetch("http://localhost/api/enseignements", {
      method: "POST",
      headers: { "content-type": "application/json" },
      body: JSON.stringify(newEns),
    });
    assertEquals(res.status, 201);
    const data: Enseignement = await res.json();
    assertEquals(data.idModule, "JIN702C");
  } finally {
    restoreFetch();
  }
});

Deno.test("mock API: POST /enseignements 403 for non-employee", async () => {
  mockFetch({ "/enseignements": { method: "POST", status: 403 } });
  try {
    const res = await fetch("http://localhost/api/enseignements", {
      method: "POST",
    });
    assertEquals(res.status, 403);
  } finally {
    restoreFetch();
  }
});

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

Deno.test("mock API: POST /enseignements 409 on duplicate", async () => {
  mockFetch({
    "/enseignements": {
      method: "POST",
      status: 409,
      body: { error: "Cet enseignement existe déjà." },
    },
  });
  try {
    const res = await fetch("http://localhost/api/enseignements", {
      method: "POST",
      headers: { "content-type": "application/json" },
      body: JSON.stringify({
        idProf: "prof.dupont",
        idModule: "JIN702C",
        idPromo: "4AFISE25/26",
      }),
    });
    assertEquals(res.status, 409);
    const data = await res.json();
    assertExists(data.error);
  } finally {
    restoreFetch();
  }
});

Deno.test("mock API: GET /enseignements/:idProf/:idModule/:idPromo returns enseignement (employee)", async () => {
  const ens: Enseignement = {
    idProf: "prof.dupont",
    idModule: "JIN702C",
    idPromo: "4AFISE25/26",
  };
  mockFetch({ "/enseignements/prof.dupont/JIN702C/4AFISE25": ens });
  try {
    const res = await fetch(
      "http://localhost/api/enseignements/prof.dupont/JIN702C/4AFISE25%2F26",
    );
    assertEquals(res.status, 200);
    const data: Enseignement = await res.json();
    assertEquals(data.idProf, "prof.dupont");
    assertEquals(data.idModule, "JIN702C");
  } finally {
    restoreFetch();
  }
});

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

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

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

Deno.test("mock API: DELETE /enseignements/:idProf/:idModule/:idPromo 403 for non-employee", async () => {
  mockFetch({
    "/enseignements/prof.dupont/JIN702C/4AFISE25": {
      method: "DELETE",
      status: 403,
    },
  });
  try {
    const res = await fetch(
      "http://localhost/api/enseignements/prof.dupont/JIN702C/4AFISE25%2F26",
      {
        method: "DELETE",
      },
    );
    assertEquals(res.status, 403);
  } finally {
    restoreFetch();
  }
});

// --- Mock DB ---

Deno.test("mock DB: find enseignement by composite key", () => {
  const data = [
    { idProf: "prof.dupont", idModule: "JIN702C", idPromo: "4AFISE25/26" },
    { idProf: "prof.moreau", idModule: "JIN703C", idPromo: "4AFISE25/26" },
  ];
  const db = createMockDb({ tables: { enseignements: data } });
  const e = db.findOne<Enseignement>(
    "enseignements",
    (e) => e.idProf === "prof.dupont" && e.idModule === "JIN702C",
  );
  assertExists(e);
  assertEquals(e.idPromo, "4AFISE25/26");
});

Deno.test("mock DB: insert enseignement", () => {
  const db = createMockDb({ tables: { enseignements: [] } });
  db.insert<Enseignement>("enseignements", {
    idProf: "prof.dupont",
    idModule: "JIN702C",
    idPromo: "4AFISE25/26",
  });
  assertEquals(db.getTable("enseignements").length, 1);
});

Deno.test("mock DB: delete enseignement", () => {
  const data = [
    { idProf: "prof.dupont", idModule: "JIN702C", idPromo: "4AFISE25/26" },
    { idProf: "prof.moreau", idModule: "JIN703C", idPromo: "4AFISE25/26" },
  ];
  const db = createMockDb({ tables: { enseignements: data } });
  db.deleteWhere<Enseignement>(
    "enseignements",
    (e) => e.idProf === "prof.dupont",
  );
  assertEquals(db.getTable("enseignements").length, 1);
});

Deno.test("mock DB: filter enseignements by idModule", () => {
  const data = [
    { idProf: "prof.dupont", idModule: "JIN702C", idPromo: "4AFISE25/26" },
    { idProf: "prof.dupont", idModule: "JIN702C", idPromo: "3AFISE25/26" },
    { idProf: "prof.moreau", idModule: "JIN703C", idPromo: "4AFISE25/26" },
  ];
  const db = createMockDb({ tables: { enseignements: data } });
  const rows = db.findMany<Enseignement>(
    "enseignements",
    (e) => e.idModule === "JIN702C",
  );
  assertEquals(rows.length, 2);
});