import os
import csv
import sys
from pathlib import Path
sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
from gps import dms_to_decimal, extract_gps_simple, find_nearest_gps, load_gps_log

def test_dms_to_decimal():
    """Validates mathematical tuple translations natively scaling numeric ranges."""
    # Standard DMS tuple format mapping
    tup = ((34, 1), (3, 1), (8, 1))
    val_n = dms_to_decimal(tup, 'N')
    assert abs(val_n - 34.052222) < 0.0001, "Positive DMS conversion calculation failed natively."
    
    val_w = dms_to_decimal(tup, 'W')
    assert val_w < 0, "Negative directional scaling failed natively for longitude conversion."
    
    # Flat number failure mode test bridging mapping
    val_flat = dms_to_decimal(34.0522, 'N')
    assert val_flat == 34.0522, "Non-standard flat EXIF mapping conversion calculation failed natively."
    print("test_dms_to_decimal passed.")

def test_load_gps_log():
    """Verify loading constraints targeting dynamic IO boundaries via mock structural datasets."""
    export_path = Path("test_gps_log.csv")
    with export_path.open('w', newline='', encoding='utf-8') as f:
        writer = csv.DictWriter(f, fieldnames=['timestamp', 'latitude', 'longitude'])
        writer.writeheader()
        writer.writerow({'timestamp': '2026-04-05T12:00:00', 'latitude': '34.0', 'longitude': '-118.0'})
        writer.writerow({'timestamp': '2026-04-05T12:05:00', 'latitude': '34.1', 'longitude': '-118.1'})
        
    data = load_gps_log(export_path)
    assert len(data) == 2, "Array length generation bounding issue."
    assert data[0]['latitude'] == 34.0, "Parsing type casting boundary issue resolving floats physically."
    
    export_path.unlink()
    print("test_load_gps_log passed.")

def test_find_nearest_gps():
    """Assert minimum bridging bounding gap searches properly evaluate chronology distances natively."""
    mock_log = [
        {'timestamp': '2026-04-05T12:00:00', 'latitude': 34.0, 'longitude': -118.0},
        {'timestamp': '2026-04-05T12:05:00', 'latitude': 34.1, 'longitude': -118.1},
        {'timestamp': '2026-04-05T12:10:00', 'latitude': 34.2, 'longitude': -118.2}
    ]
    
    # Target precisely in between index 0 and 1, closer to 1
    target_ts = '2026-04-05T12:02:35'
    nearest = find_nearest_gps(target_ts, mock_log)
    
    assert nearest['latitude'] == 34.1, "Closest relative bounding gap calculation routing execution structurally failed natively."
    print("test_find_nearest_gps passed.")

if __name__ == "__main__":
    test_dms_to_decimal()
    test_load_gps_log()
    test_find_nearest_gps()
    print("ALL GPS TESTS PASSED")