import { describe, it, expect, beforeAll, afterAll } from 'vitest';
import { mkdtempSync, rmSync, existsSync } from 'node:fs';
import { join } from 'node:path';
import { tmpdir } from 'node:os';
import { type FastifyInstance } from 'fastify';
import { initDatabaseAsync, closeDatabase } from '../db/index';
import { runMigrations } from '../db/migrate';
import { buildServer } from '../server/index';
import { systemConfig } from '../db/schema/index';
import { eq } from 'drizzle-orm';
import { type LibSQLDatabase } from 'drizzle-orm/libsql';
import type * as schema from '../db/schema/index';

/**
 * Integration tests for format profile CRUD API endpoints.
 * Uses Fastify inject — no real HTTP ports.
 */

describe('Format Profile API', () => {
  let server: FastifyInstance;
  let db: LibSQLDatabase<typeof schema>;
  let apiKey: string;
  let tmpDir: string;

  beforeAll(async () => {
    tmpDir = mkdtempSync(join(tmpdir(), 'tubearr-fp-api-'));
    const dbPath = join(tmpDir, 'test.db');
    db = await initDatabaseAsync(dbPath);
    await runMigrations(dbPath);
    server = await buildServer({ db });
    await server.ready();

    // Read API key from database (generated by auth plugin)
    const rows = await db
      .select()
      .from(systemConfig)
      .where(eq(systemConfig.key, 'api_key'))
      .limit(1);
    apiKey = rows[0]?.value ?? '';
    expect(apiKey).toBeTruthy();
  });

  afterAll(async () => {
    await server.close();
    closeDatabase();
    try {
      if (tmpDir && existsSync(tmpDir)) {
        rmSync(tmpDir, { recursive: true, force: true });
      }
    } catch {
      // Temp dir cleanup is best-effort on Windows
    }
  });

  // ── Helpers ──

  function authed(opts: Record<string, unknown>) {
    return {
      ...opts,
      headers: { 'x-api-key': apiKey, ...(opts.headers as Record<string, string> | undefined) },
    };
  }

  // ── Auth gating ──

  describe('Authentication', () => {
    it('returns 401 when no API key is provided', async () => {
      const res = await server.inject({
        method: 'GET',
        url: '/api/v1/format-profile',
      });
      expect(res.statusCode).toBe(401);
    });
  });

  // ── CRUD lifecycle ──

  describe('CRUD lifecycle', () => {
    let profileId: number;

    it('POST creates a format profile', async () => {
      const res = await server.inject(
        authed({
          method: 'POST',
          url: '/api/v1/format-profile',
          payload: {
            name: 'HD Video',
            videoResolution: '1080p',
            audioCodec: 'aac',
            audioBitrate: '192k',
            containerFormat: 'mp4',
            isDefault: false,
          },
        })
      );

      expect(res.statusCode).toBe(201);
      const body = res.json();
      expect(body.name).toBe('HD Video');
      expect(body.videoResolution).toBe('1080p');
      expect(body.audioCodec).toBe('aac');
      expect(body.audioBitrate).toBe('192k');
      expect(body.containerFormat).toBe('mp4');
      expect(body.isDefault).toBe(false);
      expect(body.id).toBeDefined();
      profileId = body.id;
    });

    it('GET / lists all profiles', async () => {
      const res = await server.inject(
        authed({ method: 'GET', url: '/api/v1/format-profile' })
      );

      expect(res.statusCode).toBe(200);
      const body = res.json();
      expect(Array.isArray(body)).toBe(true);
      expect(body.length).toBeGreaterThanOrEqual(1);
      expect(body.some((p: { id: number }) => p.id === profileId)).toBe(true);
    });

    it('GET /:id returns a single profile', async () => {
      const res = await server.inject(
        authed({ method: 'GET', url: `/api/v1/format-profile/${profileId}` })
      );

      expect(res.statusCode).toBe(200);
      const body = res.json();
      expect(body.id).toBe(profileId);
      expect(body.name).toBe('HD Video');
    });

    it('PUT /:id updates profile fields', async () => {
      const res = await server.inject(
        authed({
          method: 'PUT',
          url: `/api/v1/format-profile/${profileId}`,
          payload: { name: 'Full HD', videoResolution: '1080p' },
        })
      );

      expect(res.statusCode).toBe(200);
      const body = res.json();
      expect(body.id).toBe(profileId);
      expect(body.name).toBe('Full HD');
    });

    it('DELETE /:id removes the profile', async () => {
      const res = await server.inject(
        authed({ method: 'DELETE', url: `/api/v1/format-profile/${profileId}` })
      );

      expect(res.statusCode).toBe(204);

      // Verify it's gone
      const getRes = await server.inject(
        authed({ method: 'GET', url: `/api/v1/format-profile/${profileId}` })
      );
      expect(getRes.statusCode).toBe(404);
    });
  });

  // ── 404 handling ──

  describe('Not found handling', () => {
    it('GET /:id returns 404 for non-existent profile', async () => {
      const res = await server.inject(
        authed({ method: 'GET', url: '/api/v1/format-profile/99999' })
      );
      expect(res.statusCode).toBe(404);
      expect(res.json().error).toBe('Not Found');
    });

    it('PUT /:id returns 404 for non-existent profile', async () => {
      const res = await server.inject(
        authed({
          method: 'PUT',
          url: '/api/v1/format-profile/99999',
          payload: { name: 'Nope' },
        })
      );
      expect(res.statusCode).toBe(404);
    });

    it('DELETE /:id returns 404 for non-existent profile', async () => {
      const res = await server.inject(
        authed({ method: 'DELETE', url: '/api/v1/format-profile/99999' })
      );
      expect(res.statusCode).toBe(404);
    });
  });

  // ── Validation errors ──

  describe('Validation', () => {
    it('POST rejects body missing required name', async () => {
      const res = await server.inject(
        authed({
          method: 'POST',
          url: '/api/v1/format-profile',
          payload: { videoResolution: '720p' },
        })
      );
      expect(res.statusCode).toBe(400);
    });

    it('POST rejects body with empty name', async () => {
      const res = await server.inject(
        authed({
          method: 'POST',
          url: '/api/v1/format-profile',
          payload: { name: '' },
        })
      );
      expect(res.statusCode).toBe(400);
    });

    it('GET /:id returns 400 for non-numeric ID', async () => {
      const res = await server.inject(
        authed({ method: 'GET', url: '/api/v1/format-profile/abc' })
      );
      expect(res.statusCode).toBe(400);
    });
  });

  // ── Default profile management ──

  describe('Default profile', () => {
    it('setting isDefault on one profile clears it from others', async () => {
      // Create first profile as default
      const res1 = await server.inject(
        authed({
          method: 'POST',
          url: '/api/v1/format-profile',
          payload: { name: 'Default A', isDefault: true },
        })
      );
      expect(res1.statusCode).toBe(201);
      const profileA = res1.json();
      expect(profileA.isDefault).toBe(true);

      // Create second profile as default — should clear the first
      const res2 = await server.inject(
        authed({
          method: 'POST',
          url: '/api/v1/format-profile',
          payload: { name: 'Default B', isDefault: true },
        })
      );
      expect(res2.statusCode).toBe(201);
      const profileB = res2.json();
      expect(profileB.isDefault).toBe(true);

      // Verify first profile is no longer default
      const resA = await server.inject(
        authed({ method: 'GET', url: `/api/v1/format-profile/${profileA.id}` })
      );
      expect(resA.json().isDefault).toBe(false);

      // Clean up — profileA is not default so it's deletable.
      // profileB is default and protected — leave it (shared test DB, no conflict).
      await server.inject(
        authed({ method: 'DELETE', url: `/api/v1/format-profile/${profileA.id}` })
      );
    });
  });

  // ── Default profile protection ──

  describe('Default profile protection', () => {
    it('DELETE default profile returns 403', async () => {
      const createRes = await server.inject(
        authed({
          method: 'POST',
          url: '/api/v1/format-profile',
          payload: { name: 'Protected Default', isDefault: true },
        })
      );
      expect(createRes.statusCode).toBe(201);
      const profile = createRes.json();

      const deleteRes = await server.inject(
        authed({ method: 'DELETE', url: `/api/v1/format-profile/${profile.id}` })
      );
      expect(deleteRes.statusCode).toBe(403);
      expect(deleteRes.json().message).toBe('Cannot delete the default format profile');

      // Profile remains in DB (default, protected) — no cleanup needed for test isolation
    });

    it('DELETE non-default profile still works', async () => {
      const createRes = await server.inject(
        authed({
          method: 'POST',
          url: '/api/v1/format-profile',
          payload: { name: 'Deletable Profile', isDefault: false },
        })
      );
      expect(createRes.statusCode).toBe(201);
      const profile = createRes.json();

      const deleteRes = await server.inject(
        authed({ method: 'DELETE', url: `/api/v1/format-profile/${profile.id}` })
      );
      expect(deleteRes.statusCode).toBe(204);
    });

    it('PUT default profile with isDefault: false returns 400', async () => {
      const createRes = await server.inject(
        authed({
          method: 'POST',
          url: '/api/v1/format-profile',
          payload: { name: 'Default No Unset', isDefault: true },
        })
      );
      expect(createRes.statusCode).toBe(201);
      const profile = createRes.json();

      const putRes = await server.inject(
        authed({
          method: 'PUT',
          url: `/api/v1/format-profile/${profile.id}`,
          payload: { isDefault: false },
        })
      );
      expect(putRes.statusCode).toBe(400);
      expect(putRes.json().message).toBe('Cannot unset isDefault on the default format profile');

      // Clean up — force unset via direct DB or just leave (fresh DB per suite)
      // We can't unset via API (that's what we're testing), so just leave it
    });

    it('PUT default profile with other fields works', async () => {
      const createRes = await server.inject(
        authed({
          method: 'POST',
          url: '/api/v1/format-profile',
          payload: { name: 'Renameable Default', isDefault: true },
        })
      );
      expect(createRes.statusCode).toBe(201);
      const profile = createRes.json();

      const putRes = await server.inject(
        authed({
          method: 'PUT',
          url: `/api/v1/format-profile/${profile.id}`,
          payload: { name: 'Renamed Default', videoResolution: '1080p' },
        })
      );
      expect(putRes.statusCode).toBe(200);
      const updated = putRes.json();
      expect(updated.name).toBe('Renamed Default');
      expect(updated.videoResolution).toBe('1080p');
      expect(updated.isDefault).toBe(true);
    });
  });
});