import pytest
import os
import io
import json
from werkzeug.datastructures import FileStorage

class TestDocuments:
    """Test document management functionality."""
    
    def setup_project(self, logged_in_client, app):
        """Helper to create a test project."""
        # Create a project
        logged_in_client.post('/projects/create', data={
            'codigo': 'TESTDOC',
            'descripcion': 'Proyecto para documentos',
            'cliente': 'Cliente Test',
            'esquema': 'TEST001',
            'destinacion': 'Pruebas',
            'notas': 'Proyecto para pruebas de documentos'
        }, follow_redirects=True)
        
        # Find the project ID
        with app.app_context():
            projects_dir = os.path.join(app.config['STORAGE_PATH'], 'projects')
            project_dirs = [d for d in os.listdir(projects_dir) if 'TESTDOC' in d]
            assert len(project_dirs) > 0
            
            project_dir = project_dirs[0]
            return project_dir.split('_')[0].replace('@', '')
    
    def test_upload_document(self, logged_in_client, app):
        """Test uploading a document to a project."""
        # Create a project and get its ID
        project_id = self.setup_project(logged_in_client, app)
        
        # Create a test file
        test_file = FileStorage(
            stream=io.BytesIO(b'This is a test document content.'),
            filename='test_document.txt',
            content_type='text/plain',
        )
        
        # Upload the document
        response = logged_in_client.post(
            f'/projects/{project_id}/documents/upload',
            data={
                'tipo_doc': 'Documento de Prueba',  # Match schema type from TEST001
                'descripcion': 'Documento de prueba para tests',
                'file': test_file
            },
            content_type='multipart/form-data',
            follow_redirects=True
        )
        
        assert response.status_code == 200
        
        # Verify document was created
        with app.app_context():
            project_path = None
            
            projects_dir = os.path.join(app.config['STORAGE_PATH'], 'projects')
            for dir_name in os.listdir(projects_dir):
                if dir_name.startswith(f'@{project_id}_'):
                    project_path = os.path.join(projects_dir, dir_name)
                    break
                    
            assert project_path is not None
            
            # Check for documents directory with content
            docs_path = os.path.join(project_path, 'documents')
            assert os.path.exists(docs_path)
            
            # Should have at least one document folder
            assert len(os.listdir(docs_path)) > 0
            
    def test_document_versions(self, logged_in_client, app):
        """Test document versioning functionality."""
        # Create a project and upload first version
        project_id = self.setup_project(logged_in_client, app)
        
        # Upload first version
        test_file1 = FileStorage(
            stream=io.BytesIO(b'Document content version 1'),
            filename='test_versioning.txt',
            content_type='text/plain',
        )
        
        logged_in_client.post(
            f'/projects/{project_id}/documents/upload',
            data={
                'tipo_doc': 'Documento de Prueba',
                'descripcion': 'Documento para pruebas de versiones',
                'file': test_file1
            },
            content_type='multipart/form-data',
            follow_redirects=True
        )
        
        # Find the document ID
        doc_id = None
        with app.app_context():
            projects_dir = os.path.join(app.config['STORAGE_PATH'], 'projects')
            for dir_name in os.listdir(projects_dir):
                if dir_name.startswith(f'@{project_id}_'):
                    project_path = os.path.join(projects_dir, dir_name)
                    docs_path = os.path.join(project_path, 'documents')
                    
                    # Get first document directory
                    doc_dirs = os.listdir(docs_path)
                    if doc_dirs:
                        doc_id = doc_dirs[0].split('_')[0].replace('@', '')
                        break
        
        assert doc_id is not None
        
        # Upload second version of the same document
        test_file2 = FileStorage(
            stream=io.BytesIO(b'Document content version 2 - UPDATED'),
            filename='test_versioning_v2.txt',
            content_type='text/plain',
        )
        
        response = logged_in_client.post(
            f'/projects/{project_id}/documents/{doc_id}/upload',
            data={
                'descripcion': 'Segunda versión del documento',
                'file': test_file2
            },
            content_type='multipart/form-data',
            follow_redirects=True
        )
        
        assert response.status_code == 200
        
        # Check for multiple versions in metadata
        with app.app_context():
            projects_dir = os.path.join(app.config['STORAGE_PATH'], 'projects')
            for dir_name in os.listdir(projects_dir):
                if dir_name.startswith(f'@{project_id}_'):
                    project_path = os.path.join(projects_dir, dir_name)
                    docs_path = os.path.join(project_path, 'documents')
                    
                    # Find document directory
                    for doc_dir in os.listdir(docs_path):
                        if doc_dir.startswith(f'@{doc_id}_'):
                            doc_path = os.path.join(docs_path, doc_dir)
                            meta_path = os.path.join(doc_path, 'meta.json')
                            
                            # Check metadata for versions
                            if os.path.exists(meta_path):
                                with open(meta_path, 'r') as f:
                                    metadata = json.load(f)
                                    assert 'versions' in metadata
                                    assert len(metadata['versions']) >= 2