# -*- coding: utf-8 -*-
"""Integration tests for EQuIS data operations.

Note: These tests require Oracle database credentials and network access.
Most tests use mocks to avoid requiring actual credentials.
"""

import tempfile
from pathlib import Path
from unittest.mock import patch, MagicMock
import pytest
import pandas as pd


# Check if warehouse module can be imported (requires data files)
try:
    from mpcaHydro import warehouse
    WAREHOUSE_AVAILABLE = True
except Exception:
    WAREHOUSE_AVAILABLE = False
    warehouse = None

requires_warehouse = pytest.mark.skipif(
    not WAREHOUSE_AVAILABLE,
    reason="Warehouse module not available (missing data files)"
)


class TestEquisConnectionMocked:
    """Tests for EQuIS connection with mocks."""

    def test_connect_function_exists(self):
        """Test that equis.connect function exists and is callable."""
        from mpcaHydro import equis
        
        assert callable(equis.connect)
        assert callable(equis.close_connection)

    def test_connect_accepts_connection_parameter(self):
        """Test that download accepts optional connection parameter."""
        import inspect
        from mpcaHydro import equis
        
        sig = inspect.signature(equis.download)
        assert 'connection' in sig.parameters

    def test_close_connection_accepts_connection_parameter(self):
        """Test that close_connection accepts optional connection parameter."""
        import inspect
        from mpcaHydro import equis
        
        sig = inspect.signature(equis.close_connection)
        assert 'connection' in sig.parameters


class TestEquisTransform:
    """Tests for EQuIS data transformation."""

    def test_transform_exists(self):
        """Test that equis.transform function exists."""
        from mpcaHydro import equis
        
        assert callable(equis.transform)

    def test_transform_with_mock_data(self):
        """Test EQuIS transform with mock data."""
        from mpcaHydro import equis
        from datetime import datetime
        
        # Create mock EQuIS data structure
        mock_data = pd.DataFrame({
            'SYS_LOC_CODE': ['S-001', 'S-001'],
            'CAS_RN': ['SOLIDS-TSS', 'SOLIDS-TSS'],
            'SAMPLE_DATE_TIME': [datetime(2020, 1, 1, 10, 0), datetime(2020, 1, 1, 11, 0)],
            'SAMPLE_DATE_TIMEZONE': ['CST', 'CST'],
            'RESULT_NUMERIC': [50.0, 55.0],
            'RESULT_UNIT': ['mg/L', 'mg/L'],
        })
        
        # Transform should handle this data
        try:
            result = equis.transform(mock_data)
            assert isinstance(result, pd.DataFrame)
        except Exception as e:
            # May fail due to missing columns in mock, which is expected
            pass

    def test_cas_rn_mapping(self):
        """Test that CAS_RN mapping dict is defined."""
        from mpcaHydro import equis
        
        assert hasattr(equis, 'CAS_RN_MAP')
        assert isinstance(equis.CAS_RN_MAP, dict)
        assert 'SOLIDS-TSS' in equis.CAS_RN_MAP
        assert equis.CAS_RN_MAP['SOLIDS-TSS'] == 'TSS'


class TestEquisDownloadPlaceholder:
    """Placeholder tests for EQuIS download (requires credentials)."""

    @pytest.mark.integration
    @pytest.mark.network
    @pytest.mark.skip(reason="Requires Oracle credentials")
    def test_download_equis_data(self):
        """Test downloading EQuIS data (requires Oracle credentials)."""
        from mpcaHydro import equis
        import os
        
        username = os.environ.get('ORACLE_USER')
        password = os.environ.get('ORACLE_PASSWORD')
        
        if not username or not password:
            pytest.skip("Oracle credentials not available")
        
        conn = equis.connect(user=username, password=password)
        
        station_ids = ['S-001234']  # Example station
        df = equis.download(station_ids, connection=conn)
        
        equis.close_connection(conn)
        
        assert isinstance(df, pd.DataFrame)


class TestEquisWithMockedDownload:
    """Tests for EQuIS operations using mocked Oracle connection."""

    @requires_warehouse
    def test_download_equis_data_mocked(self):
        """Test download_equis_data with mocked Oracle."""
        from mpcaHydro import data_manager_functions as dmf
        from mpcaHydro import warehouse
        from mpcaHydro import equis
        from datetime import datetime
        
        # Create mock EQuIS raw data
        mock_raw_data = pd.DataFrame({
            'LATITUDE': [44.5, 44.5],
            'LONGITUDE': [-93.2, -93.2],
            'WID_LIST': ['123', '123'],
            'SAMPLE_METHOD': ['G', 'G'],
            'SAMPLE_REMARK': [None, None],
            'SYS_LOC_CODE': ['S-001', 'S-001'],
            'CAS_RN': ['SOLIDS-TSS', '7723-14-0'],
            'SAMPLE_DATE_TIME': [datetime(2020, 1, 1, 10, 0), datetime(2020, 1, 1, 10, 0)],
            'SAMPLE_DATE_TIMEZONE': ['CST', 'CST'],
            'RESULT_NUMERIC': [50.0, 0.5],
            'RESULT_UNIT': ['mg/L', 'mg/L'],
        })
        
        with tempfile.TemporaryDirectory() as tmpdir:
            db_path = Path(tmpdir) / 'test.duckdb'
            warehouse.init_db(db_path.as_posix(), reset=True)
            
            with warehouse.connect(db_path.as_posix(), read_only=False) as con:
                # Load mock staging data
                warehouse.load_df_to_table(con, mock_raw_data, 'staging.equis')
                
                # Verify data was loaded
                count = con.execute("SELECT COUNT(*) FROM staging.equis").fetchone()[0]
                assert count == 2


if __name__ == '__main__':
    pytest.main([__file__, '-v'])
