import { assertEquals, assertExists } from "@std/assert";
import {
  seedPromotions,
  seedStudents,
  testDb,
  truncateAll,
} from "../helpers/db_integration.ts";
import { students } from "$root/databases/schema.ts";
import { eq } from "npm:drizzle-orm@0.45.2";

Deno.test({
  name: "integration: GET /students - returns all students",
  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" },
      { nom: "Durand", prenom: "Claire", idPromo: "PEIP1-2024" },
    ]);

    const rows = await testDb.select().from(students);
    assertEquals(rows.length, 3);
  },
  sanitizeResources: false,
  sanitizeOps: false,
});

Deno.test({
  name: "integration: 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 rows = await testDb
      .select()
      .from(students)
      .where(eq(students.idPromo, "PEIP1-2024"));

    assertEquals(rows.length, 2);
  },
  sanitizeResources: false,
  sanitizeOps: false,
});

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

    const [created] = await testDb
      .insert(students)
      .values({ nom: "Leroy", prenom: "Paul", idPromo: "INFO3-2024" })
      .returning();

    assertExists(created);
    assertExists(created.numEtud);
    assertEquals(created.nom, "Leroy");
    assertEquals(created.prenom, "Paul");
    assertEquals(created.idPromo, "INFO3-2024");
  },
  sanitizeResources: false,
  sanitizeOps: false,
});

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

    const row = await testDb
      .select()
      .from(students)
      .where(eq(students.numEtud, student.numEtud))
      .then((r) => r[0] ?? null);

    assertExists(row);
    assertEquals(row.nom, "Bernard");
  },
  sanitizeResources: false,
  sanitizeOps: false,
});

Deno.test({
  name: "integration: GET /students/:numEtud - returns null when not found",
  async fn() {
    await truncateAll();

    const row = await testDb
      .select()
      .from(students)
      .where(eq(students.numEtud, 999999))
      .then((r) => r[0] ?? null);

    assertEquals(row, null);
  },
  sanitizeResources: false,
  sanitizeOps: false,
});

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

    const [updated] = await testDb
      .update(students)
      .set({ nom: "Grand", prenom: "Hugo", idPromo: "INFO4-2024" })
      .where(eq(students.numEtud, student.numEtud))
      .returning();

    assertExists(updated);
    assertEquals(updated.nom, "Grand");
    assertEquals(updated.idPromo, "INFO4-2024");
  },
  sanitizeResources: false,
  sanitizeOps: false,
});

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

    const [deleted] = await testDb
      .delete(students)
      .where(eq(students.numEtud, student.numEtud))
      .returning();

    assertExists(deleted);

    const row = await testDb
      .select()
      .from(students)
      .where(eq(students.numEtud, student.numEtud))
      .then((r) => r[0] ?? null);

    assertEquals(row, null);
  },
  sanitizeResources: false,
  sanitizeOps: false,
});