// #113 - Unit tests for /modules endpoints

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

// --- Fixtures ---

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

// --- Mock API ---

Deno.test("mock API: GET /modules returns list", async () => {
  mockFetch({ "/modules": modules });
  try {
    const res = await fetch("http://localhost/api/modules");
    assertEquals(res.status, 200);
    const data: Module[] = await res.json();
    assertEquals(data.length, 3);
    assertExists(data.find((m) => m.id === "JIN702C"));
  } finally {
    restoreFetch();
  }
});

Deno.test("mock API: GET /modules/:id returns one module", async () => {
  mockFetch({ "/modules/JIN702C": modules[0] });
  try {
    const res = await fetch("http://localhost/api/modules/JIN702C");
    assertEquals(res.status, 200);
    const data: Module = await res.json();
    assertEquals(data.id, "JIN702C");
    assertEquals(data.nom, "Optimisation");
  } finally {
    restoreFetch();
  }
});

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

Deno.test("mock API: POST /modules creates module (201)", async () => {
  const newModule: Module = { id: "NEW101", nom: "Nouveau Module" };
  mockFetch({ "/modules": { method: "POST", status: 201, body: newModule } });
  try {
    const res = await fetch("http://localhost/api/modules", {
      method: "POST",
      headers: { "content-type": "application/json" },
      body: JSON.stringify(newModule),
    });
    assertEquals(res.status, 201);
    const data: Module = await res.json();
    assertEquals(data.id, "NEW101");
  } finally {
    restoreFetch();
  }
});

Deno.test("mock API: POST /modules 409 on duplicate id", async () => {
  mockFetch({
    "/modules": {
      method: "POST",
      status: 409,
      body: { error: "Un module avec cet identifiant existe déjà" },
    },
  });
  try {
    const res = await fetch("http://localhost/api/modules", {
      method: "POST",
      headers: { "content-type": "application/json" },
      body: JSON.stringify(modules[0]),
    });
    assertEquals(res.status, 409);
  } finally {
    restoreFetch();
  }
});

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

Deno.test("mock API: PUT /modules/:id updates nom", async () => {
  const updated: Module = { id: "JIN702C", nom: "Optimisation avancée" };
  mockFetch({
    "/modules/JIN702C": { method: "PUT", status: 200, body: updated },
  });
  try {
    const res = await fetch("http://localhost/api/modules/JIN702C", {
      method: "PUT",
      headers: { "content-type": "application/json" },
      body: JSON.stringify({ nom: "Optimisation avancée" }),
    });
    assertEquals(res.status, 200);
    const data: Module = await res.json();
    assertEquals(data.nom, "Optimisation avancée");
  } finally {
    restoreFetch();
  }
});

Deno.test("mock API: DELETE /modules/:id returns 204", async () => {
  mockFetch({ "/modules/JIN702C": { method: "DELETE", status: 204 } });
  try {
    const res = await fetch("http://localhost/api/modules/JIN702C", {
      method: "DELETE",
    });
    assertEquals(res.status, 204);
  } finally {
    restoreFetch();
  }
});

// --- Mock DB ---

Deno.test("mock DB: find module by id", () => {
  const db = createMockDb({ tables: { modules: [...modules] } });
  const m = db.findOne<Module>("modules", (m) => m.id === "JIN702C");
  assertExists(m);
  assertEquals(m.nom, "Optimisation");
});

Deno.test("mock DB: insert module", () => {
  const db = createMockDb({ tables: { modules: [...modules] } });
  db.insert<Module>("modules", { id: "NEW101", nom: "Nouveau" });
  assertEquals(db.getTable("modules").length, 4);
});

Deno.test("mock DB: update module nom", () => {
  const db = createMockDb({ tables: { modules: [...modules] } });
  db.updateWhere<Module>("modules", (m) => m.id === "JIN702C", {
    nom: "Updated",
  });
  assertEquals(
    db.findOne<Module>("modules", (m) => m.id === "JIN702C")?.nom,
    "Updated",
  );
});

Deno.test("mock DB: delete module", () => {
  const db = createMockDb({ tables: { modules: [...modules] } });
  db.deleteWhere<Module>("modules", (m) => m.id === "JIN702C");
  assertEquals(db.getTable("modules").length, 2);
});