from fastapi.testclient import TestClient
from fastapi import BackgroundTasks
import pytest
from unittest.mock import Mock, patch
import asyncio
import os
from main import app
from services.file import FileService
from services.task import TaskService

client = TestClient(app)

# Constants for reused values
TEST_FILE_PATH = os.path.join(os.getcwd(), "tests/test_files", "manabox_test_file.csv")
DEFAULT_METADATA = {
    "source": "manabox",
    "type": "scan_export_rare"
}

def get_file_size_kb(file_path):
    """Helper to consistently calculate file size in KB"""
    with open(file_path, "rb") as f:
        return round(len(f.read()) / 1024, 2)

@pytest.mark.asyncio
async def test_create_manabox_file():
    """Test creating a new manabox file"""
    # Open file within the test scope
    with open(TEST_FILE_PATH, "rb") as test_file:
        files = {"file": test_file}
        
        # Make request
        response = client.post("/api/files", data=DEFAULT_METADATA, files=files)
        
        # Check response
        assert response.status_code == 201
        assert response.json()["success"] == True
        
        file_data = response.json()["files"][0]
        assert file_data["source"] == DEFAULT_METADATA["source"]
        assert file_data["type"] == DEFAULT_METADATA["type"]
        assert file_data["status"] == "pending"
        assert file_data["service"] == None
        assert file_data["filename"] == "manabox_test_file.csv"
        assert file_data["filesize_kb"] == get_file_size_kb(TEST_FILE_PATH)
        assert file_data["id"] is not None

        # Execute background tasks if they were added
        background_tasks = BackgroundTasks()
        for task in background_tasks.tasks:
            await task()

def test_get_file():
    """Test retrieving a specific file"""
    # Create a file first
    with open(TEST_FILE_PATH, "rb") as test_file:
        files = {"file": test_file}
        create_response = client.post("/api/files", data=DEFAULT_METADATA, files=files)
        file_id = create_response.json()["files"][0]["id"]
    
    # Get the file
    response = client.get(f"/api/files/{file_id}")
    
    # Check response
    assert response.status_code == 200
    assert response.json()["success"] == True
    
    file_data = response.json()["files"][0]
    assert file_data["source"] == DEFAULT_METADATA["source"]
    assert file_data["type"] == DEFAULT_METADATA["type"]
    assert file_data["status"] == "completed"
    assert file_data["service"] == None
    assert file_data["filename"] == "manabox_test_file.csv"
    assert file_data["filesize_kb"] == get_file_size_kb(TEST_FILE_PATH)
    assert file_data["id"] == file_id

def test_delete_file():
    """Test file deletion"""
    # Create a file first
    with open(TEST_FILE_PATH, "rb") as test_file:
        files = {"file": test_file}
        create_response = client.post("/api/files", data=DEFAULT_METADATA, files=files)
        file_id = create_response.json()["files"][0]["id"]
    
    # Delete the file
    response = client.delete(f"/api/files/{file_id}")
    
    # Check response
    assert response.status_code == 200
    assert response.json()["success"] == True
    
    file_data = response.json()["files"][0]
    assert file_data["source"] == DEFAULT_METADATA["source"]
    assert file_data["type"] == DEFAULT_METADATA["type"]
    assert file_data["status"] == "deleted"
    assert file_data["service"] == None
    assert file_data["filename"] == "manabox_test_file.csv"
    assert file_data["filesize_kb"] == get_file_size_kb(TEST_FILE_PATH)
    assert file_data["id"] == file_id

def test_get_prepared_files():
    """Test retrieving files filtered by status"""
    # Create a test file first
    with open(TEST_FILE_PATH, "rb") as test_file:
        files = {"file": test_file}
        create_response = client.post("/api/files", data=DEFAULT_METADATA, files=files)
        file_id = create_response.json()["files"][0]["id"]
    
    # Get prepared files
    response = client.get("/api/files?status=completed")
    
    # Check response
    assert response.status_code == 200
    assert response.json()["success"] == True
    
    # get file from id
    file_data = [file for file in response.json()["files"] if file["id"] == file_id][0]
    assert file_data["source"] == DEFAULT_METADATA["source"]
    assert file_data["type"] == DEFAULT_METADATA["type"]
    assert file_data["status"] == "completed"
    assert file_data["service"] == None
    assert file_data["filename"] == "manabox_test_file.csv"
    assert file_data["filesize_kb"] == get_file_size_kb(TEST_FILE_PATH)