import os
import json
import pytest
from fastapi.testclient import TestClient
from unittest.mock import patch, MagicMock

from app.main import app
from app.core.vst_engine import HAS_PEDALBOARD, HAS_PYFLUIDSYNTH

client = TestClient(app)


def get_admin_token():
    resp = client.post("/api/v1/auth/login", json={"username": "admin", "password": "admin123"})
    if resp.status_code == 200:
        return resp.json()["access_token"]
    return None


class TestPluginAPI:
    def test_list_plugins_requires_auth(self):
        resp = client.get("/api/v1/plugins/available")
        assert resp.status_code in (401, 403)

    def test_list_plugins_authenticated(self):
        token = get_admin_token()
        if not token:
            pytest.skip("Cannot get admin token")
        resp = client.get("/api/v1/plugins/available", headers={"Authorization": f"Bearer {token}"})
        assert resp.status_code == 200
        data = resp.json()
        assert "vst_instruments" in data
        assert "soundfonts" in data

    def test_list_default_soundfonts(self):
        resp = client.get("/api/v1/plugins/default-soundfonts")
        assert resp.status_code == 200
        data = resp.json()
        assert isinstance(data, list)

    def test_render_project_invalid_json(self):
        token = get_admin_token()
        if not token:
            pytest.skip("Cannot get admin token")
        resp = client.post("/api/v1/plugins/render", headers={"Authorization": f"Bearer {token}"}, json={"project_json": {}})
        # Should fail because project is empty, but API should return 500 or error
        assert resp.status_code in (400, 422, 500)

    def test_upload_soundfont_requires_auth(self):
        resp = client.post("/api/v1/plugins/upload-soundfont")
        assert resp.status_code in (401, 403, 422)

    def test_upload_soundfont_invalid_magic(self):
        token = get_admin_token()
        if not token:
            pytest.skip("Cannot get admin token")
        # Upload a file with invalid magic bytes
        fake_content = b'XXXX\x00\x00\x00\x00YYYY' * 100
        resp = client.post(
            "/api/v1/plugins/upload-soundfont",
            headers={"Authorization": f"Bearer {token}"},
            files={"file": ("fake.sf2", fake_content, "application/octet-stream")}
        )
        assert resp.status_code == 400
        assert "Invalid SoundFont" in resp.json().get("detail", "")

    def test_upload_soundfont_valid_magic(self):
        token = get_admin_token()
        if not token:
            pytest.skip("Cannot get admin token")
        # Upload a file with valid RIFF + sfbk magic
        valid_content = b'RIFF\x00\x00\x00\x00sfbk' + b'\x00' * 200
        resp = client.post(
            "/api/v1/plugins/upload-soundfont",
            headers={"Authorization": f"Bearer {token}"},
            files={"file": ("test.sf2", valid_content, "application/octet-stream")}
        )
        # Should succeed (200) unless auth/permission issues
        if resp.status_code == 200:
            data = resp.json()
            assert "id" in data
            assert "size_bytes" in data
            assert data["size_bytes"] == len(valid_content)
        elif resp.status_code == 403:
            pytest.skip("Permission denied for admin user")