// #109 - E2E tests for /students endpoints
// Appelle les handlers Fresh directement avec un vrai contexte + vraie DB

import { assertEquals, assertExists } from "@std/assert";
import {
  makeContextWithAffiliation,
  makeEmployeeContext,
  makeGetRequest,
  makeJsonRequest,
} from "../helpers/handler.ts";
import {
  seedPromotions,
  seedStudents,
  truncateAll,
} from "../helpers/db_integration.ts";
import { handler as studentsHandler } from "$apps/students/api/students.ts";
import { handler as studentHandler } from "$apps/students/api/students/[numEtud].ts";

// --- GET /students ---

Deno.test({
  name: "e2e students: GET /students returns all students as employee",
  async fn() {
    await truncateAll();
    await seedPromotions([{ id: "PEIP1-2024" }]);
    await seedStudents([
      { nom: "Dupont", prenom: "Jean", idPromo: "PEIP1-2024" },
      { nom: "Martin", prenom: "Alice", idPromo: "PEIP1-2024" },
    ]);

    const req = makeGetRequest("/students");
    const ctx = makeEmployeeContext();
    const res = await studentsHandler.GET!(req, ctx);

    assertEquals(res.status, 200);
    const body = await res.json();
    assertEquals(body.length, 2);
    assertExists(body.find((s: { nom: string }) => s.nom === "Dupont"));
  },
  sanitizeResources: false,
  sanitizeOps: false,
});

Deno.test({
  name: "e2e students: GET /students returns empty array for non-employee",
  async fn() {
    await truncateAll();
    await seedPromotions([{ id: "PEIP1-2024" }]);
    await seedStudents([
      { nom: "Dupont", prenom: "Jean", idPromo: "PEIP1-2024" },
    ]);

    const req = makeGetRequest("/students");
    const ctx = makeContextWithAffiliation("student");
    const res = await studentsHandler.GET!(req, ctx);

    assertEquals(res.status, 200);
    const body = await res.json();
    assertEquals(body.length, 0);
  },
  sanitizeResources: false,
  sanitizeOps: false,
});

Deno.test({
  name: "e2e students: GET /students?idPromo filters by promotion",
  async fn() {
    await truncateAll();
    await seedPromotions([{ id: "PEIP1-2024" }, { id: "PEIP2-2024" }]);
    await seedStudents([
      { nom: "Dupont", prenom: "Jean", idPromo: "PEIP1-2024" },
      { nom: "Martin", prenom: "Alice", idPromo: "PEIP1-2024" },
      { nom: "Durand", prenom: "Claire", idPromo: "PEIP2-2024" },
    ]);

    const req = makeGetRequest("/students", { idPromo: "PEIP1-2024" });
    const ctx = makeEmployeeContext();
    const res = await studentsHandler.GET!(req, ctx);

    assertEquals(res.status, 200);
    const body = await res.json();
    assertEquals(body.length, 2);
    assertEquals(body.every((s: { idPromo: string }) => s.idPromo === "PEIP1-2024"), true);
  },
  sanitizeResources: false,
  sanitizeOps: false,
});

// --- POST /students ---

Deno.test({
  name: "e2e students: POST /students creates a student (201)",
  async fn() {
    await truncateAll();
    await seedPromotions([{ id: "INFO3-2024" }]);

    const req = makeJsonRequest("/students", "POST", {
      nom: "Leroy",
      prenom: "Paul",
      idPromo: "INFO3-2024",
    });
    const ctx = makeEmployeeContext();
    const res = await studentsHandler.POST!(req, ctx);

    assertEquals(res.status, 201);
    const body = await res.json();
    assertExists(body.numEtud);
    assertEquals(body.nom, "Leroy");
    assertEquals(body.idPromo, "INFO3-2024");
  },
  sanitizeResources: false,
  sanitizeOps: false,
});

Deno.test({
  name: "e2e students: POST /students 403 for non-employee",
  async fn() {
    await truncateAll();

    const req = makeJsonRequest("/students", "POST", {
      nom: "Test",
      prenom: "User",
      idPromo: "PEIP1-2024",
    });
    const ctx = makeContextWithAffiliation("student");
    const res = await studentsHandler.POST!(req, ctx);

    assertEquals(res.status, 403);
  },
  sanitizeResources: false,
  sanitizeOps: false,
});

Deno.test({
  name: "e2e students: POST /students 400 when missing required fields",
  async fn() {
    await truncateAll();

    const req = makeJsonRequest("/students", "POST", { nom: "Leroy" });
    const ctx = makeEmployeeContext();
    const res = await studentsHandler.POST!(req, ctx);

    assertEquals(res.status, 400);
  },
  sanitizeResources: false,
  sanitizeOps: false,
});

// --- GET /students/:numEtud ---

Deno.test({
  name: "e2e students: GET /students/:numEtud returns student",
  async fn() {
    await truncateAll();
    await seedPromotions([{ id: "INFO3-2024" }]);
    const [s] = await seedStudents([
      { nom: "Bernard", prenom: "Lucie", idPromo: "INFO3-2024" },
    ]);

    const req = makeGetRequest(`/students/${s.numEtud}`);
    const ctx = makeEmployeeContext({ numEtud: String(s.numEtud) });
    const res = await studentHandler.GET!(req, ctx);

    assertEquals(res.status, 200);
    const body = await res.json();
    assertEquals(body.numEtud, s.numEtud);
    assertEquals(body.nom, "Bernard");
  },
  sanitizeResources: false,
  sanitizeOps: false,
});

Deno.test({
  name: "e2e students: GET /students/:numEtud 404 when not found",
  async fn() {
    await truncateAll();

    const req = makeGetRequest("/students/999999");
    const ctx = makeEmployeeContext({ numEtud: "999999" });
    const res = await studentHandler.GET!(req, ctx);

    assertEquals(res.status, 404);
  },
  sanitizeResources: false,
  sanitizeOps: false,
});

Deno.test({
  name: "e2e students: GET /students/:numEtud 403 for non-employee",
  async fn() {
    await truncateAll();

    const req = makeGetRequest("/students/12345");
    const ctx = makeContextWithAffiliation("student", { numEtud: "12345" });
    const res = await studentHandler.GET!(req, ctx);

    assertEquals(res.status, 403);
  },
  sanitizeResources: false,
  sanitizeOps: false,
});

// --- PUT /students/:numEtud ---

Deno.test({
  name: "e2e students: PUT /students/:numEtud updates student",
  async fn() {
    await truncateAll();
    await seedPromotions([{ id: "INFO3-2024" }, { id: "INFO4-2024" }]);
    const [s] = await seedStudents([
      { nom: "Petit", prenom: "Hugo", idPromo: "INFO3-2024" },
    ]);

    const req = makeJsonRequest(`/students/${s.numEtud}`, "PUT", {
      nom: "Grand",
      prenom: "Hugo",
      idPromo: "INFO4-2024",
    });
    const ctx = makeEmployeeContext({ numEtud: String(s.numEtud) });
    const res = await studentHandler.PUT!(req, ctx);

    assertEquals(res.status, 200);
    const body = await res.json();
    assertEquals(body.nom, "Grand");
    assertEquals(body.idPromo, "INFO4-2024");
  },
  sanitizeResources: false,
  sanitizeOps: false,
});

Deno.test({
  name: "e2e students: PUT /students/:numEtud 404 when not found",
  async fn() {
    await truncateAll();
    await seedPromotions([{ id: "INFO3-2024" }]);

    const req = makeJsonRequest("/students/999999", "PUT", {
      nom: "Ghost",
      prenom: "Ghost",
      idPromo: "INFO3-2024",
    });
    const ctx = makeEmployeeContext({ numEtud: "999999" });
    const res = await studentHandler.PUT!(req, ctx);

    assertEquals(res.status, 404);
  },
  sanitizeResources: false,
  sanitizeOps: false,
});

// --- DELETE /students/:numEtud ---

Deno.test({
  name: "e2e students: DELETE /students/:numEtud returns 204",
  async fn() {
    await truncateAll();
    await seedPromotions([{ id: "INFO3-2024" }]);
    const [s] = await seedStudents([
      { nom: "Thomas", prenom: "Eva", idPromo: "INFO3-2024" },
    ]);

    const req = makeGetRequest(`/students/${s.numEtud}`);
    const ctx = makeEmployeeContext({ numEtud: String(s.numEtud) });
    const res = await studentHandler.DELETE!(req, ctx);

    assertEquals(res.status, 204);
  },
  sanitizeResources: false,
  sanitizeOps: false,
});

Deno.test({
  name: "e2e students: DELETE /students/:numEtud 404 when not found",
  async fn() {
    await truncateAll();

    const req = makeGetRequest("/students/999999");
    const ctx = makeEmployeeContext({ numEtud: "999999" });
    const res = await studentHandler.DELETE!(req, ctx);

    assertEquals(res.status, 404);
  },
  sanitizeResources: false,
  sanitizeOps: false,
});