import unittest
import tempfile
import os
from PIL import Image

from map_manager.services import OpenStreetMapService
from map_manager.tile_manager import MapTileManager


class TestTileManagerCacheBehavior(unittest.TestCase):
    def test_cache_hit_and_placeholder(self):
        service = OpenStreetMapService()
        with tempfile.TemporaryDirectory() as td:
            mgr = MapTileManager(service, cache_root_directory=td, enable_online_tile_fetching=False, tile_pixel_size=64)
            # Create a cached tile file
            p = mgr._get_tile_cache_file_path(5, 10, 12)
            p.parent.mkdir(parents=True, exist_ok=True)
            img = Image.new("RGB", (64, 64), (255, 0, 0))
            img.save(p)

            # Now get_tile_image should load from cache
            loaded = mgr.get_tile_image(5, 10, 12)
            self.assertIsNotNone(loaded)
            self.assertEqual(loaded.size, (64, 64))

            # For a missing tile (cache miss) and online disabled, should return a placeholder image
            missing = mgr.get_tile_image(6, 11, 13)
            self.assertIsNotNone(missing)
            # Placeholder should have expected tile size
            self.assertEqual(missing.size, (64, 64))


if __name__ == '__main__':
    unittest.main()