//! Integration tests for NigigMapView internal logic
//!
//! These tests verify the internal state management and logic of NigigMapView
//! without requiring a full Makepad UI runtime. They complement the UI tests
//! in ui.rs by testing the widget's core functionality at a lower level.

use nigig_map::*;
use nigig_map::geometry::TileKey;
use nigig_map::style::CompiledMapTheme;
use nigig_map::overlay::{MapMarker, MapRouteOverlay, MapPuck};
use std::collections::HashMap;

// ============================================================================
// WIDGET INITIALIZATION TESTS
// ============================================================================

#[test]
fn test_nigig_map_view_default_state() {
    // Test that a newly created NigigMapView has correct default state
    // Note: We can't actually create a NigigMapView without a Makepad runtime,
    // but we can test the default values of its components
    
    let theme = CompiledMapTheme::default();
    assert_eq!(theme.background, [0.0, 0.0, 0.0, 1.0]);
}

#[test]
fn test_theme_compilation() {
    // Test that themes compile correctly
    let light_theme = nigig_map::style::default_light_theme();
    let dark_theme = nigig_map::style::default_dark_theme();
    
    // Light theme should have lighter background
    assert!(light_theme.background[0] > 0.5);
    assert!(light_theme.background[1] > 0.5);
    assert!(light_theme.background[2] > 0.5);
    
    // Dark theme should have darker background
    assert!(dark_theme.background[0] < 0.3);
    assert!(dark_theme.background[1] < 0.3);
    assert!(dark_theme.background[2] < 0.3);
}

// ============================================================================
// TILE SCHEDULING TESTS
// ============================================================================

#[test]
fn test_tile_key_generation() {
    // Test that tile keys are generated correctly for different zoom levels
    let key_z0 = TileKey { z: 0, x: 0, y: 0 };
    assert_eq!(key_z0.z, 0);
    assert_eq!(key_z0.x, 0);
    assert_eq!(key_z0.y, 0);
    
    let key_z14 = TileKey { z: 14, x: 8192, y: 8192 };
    assert_eq!(key_z14.z, 14);
    assert_eq!(key_z14.x, 8192);
    assert_eq!(key_z14.y, 8192);
}

#[test]
fn test_tile_key_equality() {
    let key1 = TileKey { z: 14, x: 100, y: 200 };
    let key2 = TileKey { z: 14, x: 100, y: 200 };
    let key3 = TileKey { z: 14, x: 100, y: 201 };
    
    assert_eq!(key1, key2);
    assert_ne!(key1, key3);
}

#[test]
fn test_tile_key_hash() {
    use std::collections::HashSet;
    
    let mut set = HashSet::new();
    set.insert(TileKey { z: 14, x: 100, y: 200 });
    set.insert(TileKey { z: 14, x: 100, y: 200 }); // Duplicate
    set.insert(TileKey { z: 14, x: 101, y: 200 });
    
    assert_eq!(set.len(), 2);
}

// ============================================================================
// OVERLAY STATE MANAGEMENT TESTS
// ============================================================================

#[test]
fn test_marker_creation() {
    let marker = MapMarker::new(1, 4.9041, 52.3676, [1.0, 0.0, 0.0, 1.0]);
    assert_eq!(marker.id, 1);
    assert!((marker.lon - 4.9041).abs() < 0.0001);
    assert!((marker.lat - 52.3676).abs() < 0.0001);
    assert_eq!(marker.color, [1.0, 0.0, 0.0, 1.0]);
}

#[test]
fn test_marker_position_normalization() {
    // Test that marker positions are normalized to [0, 1] range
    let marker = MapMarker::new(1, 0.0, 0.0, [1.0, 1.0, 1.0, 1.0]);
    assert!(marker.pos_norm[0] >= 0.0 && marker.pos_norm[0] <= 1.0);
    assert!(marker.pos_norm[1] >= 0.0 && marker.pos_norm[1] <= 1.0);
}

#[test]
fn test_route_overlay_creation() {
    let route = MapRouteOverlay::new(vec![
        [4.9041, 52.3676],
        [4.9050, 52.3680],
        [4.9060, 52.3685],
    ]);
    
    assert_eq!(route.points.len(), 3);
    assert!((route.points[0][0] - 4.9041).abs() < 0.0001);
    assert!((route.points[2][1] - 52.3685).abs() < 0.0001);
}

#[test]
fn test_route_overlay_empty() {
    let route = MapRouteOverlay::new(vec![]);
    assert_eq!(route.points.len(), 0);
}

#[test]
fn test_puck_creation() {
    let puck = MapPuck::new(4.9041, 52.3676, 45.0, 10.0);
    assert!((puck.lon - 4.9041).abs() < 0.0001);
    assert!((puck.lat - 52.3676).abs() < 0.0001);
    assert!((puck.heading - 45.0).abs() < 0.0001);
    assert!((puck.accuracy - 10.0).abs() < 0.0001);
}

#[test]
fn test_puck_position_normalization() {
    let puck = MapPuck::new(0.0, 0.0, 0.0, 5.0);
    assert!(puck.pos_norm[0] >= 0.0 && puck.pos_norm[0] <= 1.0);
    assert!(puck.pos_norm[1] >= 0.0 && puck.pos_norm[1] <= 1.0);
}

// ============================================================================
// VIEWPORT CALCULATION TESTS
// ============================================================================

#[test]
fn test_viewport_zoom_limits() {
    // Test that zoom levels are clamped to valid range
    let min_zoom = 0.0;
    let max_zoom = 22.0;
    
    // Zoom below minimum should be clamped
    let zoom = (-1.0_f64).max(min_zoom).min(max_zoom);
    assert_eq!(zoom, min_zoom);
    
    // Zoom above maximum should be clamped
    let zoom = (25.0_f64).max(min_zoom).min(max_zoom);
    assert_eq!(zoom, max_zoom);
    
    // Zoom within range should be unchanged
    let zoom = (14.0_f64).max(min_zoom).min(max_zoom);
    assert_eq!(zoom, 14.0);
}

#[test]
fn test_viewport_center_normalization() {
    // Test that viewport center is normalized to [0, 1] range
    let center_x = 0.5;
    let center_y = 0.5;
    
    assert!(center_x >= 0.0 && center_x <= 1.0);
    assert!(center_y >= 0.0 && center_y <= 1.0);
}

#[test]
fn test_viewport_wrap_around() {
    // Test that viewport wraps around at edges
    let mut center_x = 1.5;
    center_x = center_x.fract();
    assert!(center_x >= 0.0 && center_x < 1.0);
    
    let mut center_x = -0.5;
    center_x = center_x.fract();
    if center_x < 0.0 {
        center_x += 1.0;
    }
    assert!(center_x >= 0.0 && center_x < 1.0);
}

// ============================================================================
// THEME SWITCHING TESTS
// ============================================================================

#[test]
fn test_theme_switching() {
    let light = nigig_map::style::default_light_theme();
    let dark = nigig_map::style::default_dark_theme();
    
    // Verify themes are different
    assert_ne!(light.background, dark.background);
    assert_ne!(light.water_fill, dark.water_fill);
    assert_ne!(light.land_fill, dark.land_fill);
}

#[test]
fn test_theme_road_styles() {
    let theme = nigig_map::style::default_light_theme();
    
    // Verify road styles exist for common road types
    assert!(theme.road_styles.contains_key("motorway"));
    assert!(theme.road_styles.contains_key("primary"));
    assert!(theme.road_styles.contains_key("secondary"));
    assert!(theme.road_styles.contains_key("tertiary"));
    assert!(theme.road_styles.contains_key("residential"));
}

#[test]
fn test_theme_poi_styles() {
    let theme = nigig_map::style::default_light_theme();
    
    // Verify POI styles exist for common categories
    assert!(theme.poi_styles.contains_key("amenity"));
    assert!(theme.poi_styles.contains_key("shop"));
    assert!(theme.poi_styles.contains_key("tourism"));
}

// ============================================================================
// TILE CACHE TESTS
// ============================================================================

#[test]
fn test_tile_cache_capacity() {
    // Test that tile cache has reasonable capacity
    let capacity = 1000;
    assert!(capacity > 0);
    assert!(capacity < 10000); // Shouldn't be too large
}

#[test]
fn test_tile_cache_eviction() {
    // Test that oldest tiles are evicted when cache is full
    use std::collections::VecDeque;
    
    let mut cache = VecDeque::new();
    let capacity = 3;
    
    cache.push_back(TileKey { z: 14, x: 1, y: 1 });
    cache.push_back(TileKey { z: 14, x: 2, y: 2 });
    cache.push_back(TileKey { z: 14, x: 3, y: 3 });
    
    // Add one more, should evict oldest
    if cache.len() >= capacity {
        cache.pop_front();
    }
    cache.push_back(TileKey { z: 14, x: 4, y: 4 });
    
    assert_eq!(cache.len(), capacity);
    assert_eq!(cache[0], TileKey { z: 14, x: 2, y: 2 }); // Oldest should be evicted
}

// ============================================================================
// EVENT HANDLING LOGIC TESTS
// ============================================================================

#[test]
fn test_zoom_delta_calculation() {
    // Test that zoom delta is calculated correctly from scroll
    let scroll_y = 120.0;
    let zoom_sensitivity = 0.01;
    let zoom_delta = scroll_y * zoom_sensitivity;
    
    assert!((zoom_delta - 1.2).abs() < 0.0001);
}

#[test]
fn test_pan_delta_calculation() {
    // Test that pan delta is calculated correctly from drag
    let drag_x = 100.0;
    let drag_y = 50.0;
    let pan_sensitivity = 0.001;
    
    let pan_delta_x = drag_x * pan_sensitivity;
    let pan_delta_y = drag_y * pan_sensitivity;
    
    assert!((pan_delta_x - 0.1).abs() < 0.0001);
    assert!((pan_delta_y - 0.05).abs() < 0.0001);
}

#[test]
fn test_pinch_zoom_calculation() {
    // Test that pinch zoom is calculated correctly from two-finger gesture
    let initial_distance = 100.0;
    let current_distance = 150.0;
    let zoom_factor = current_distance / initial_distance;
    
    assert!((zoom_factor - 1.5).abs() < 0.0001);
}

// ============================================================================
// COORDINATE CONVERSION TESTS
// ============================================================================

#[test]
fn test_lon_lat_to_tile_coords() {
    use nigig_map::geometry::lon_lat_to_tile_coords;
    
    // Test Amsterdam coordinates at zoom 14
    let (x, y) = lon_lat_to_tile_coords(4.9041, 52.3676, 14);
    
    // Should be around tile (8192, 5376) at zoom 14
    assert!(x > 8000 && x < 9000);
    assert!(y > 5000 && y < 6000);
}

#[test]
fn test_tile_coords_to_lon_lat() {
    use nigig_map::geometry::tile_coords_to_lon_lat;
    
    // Test reverse conversion
    let (lon, lat) = tile_coords_to_lon_lat(8192, 5376, 14);
    
    // Should be close to Amsterdam
    assert!((lon - 4.9).abs() < 0.5);
    assert!((lat - 52.3).abs() < 0.5);
}

#[test]
fn test_coordinate_roundtrip() {
    use nigig_map::geometry::{lon_lat_to_tile_coords, tile_coords_to_lon_lat};
    
    let original_lon = 4.9041;
    let original_lat = 52.3676;
    let zoom = 14;
    
    let (x, y) = lon_lat_to_tile_coords(original_lon, original_lat, zoom);
    let (lon, lat) = tile_coords_to_lon_lat(x as u32, y as u32, zoom);
    
    // Should be close to original (within tile precision)
    assert!((lon - original_lon).abs() < 0.1);
    assert!((lat - original_lat).abs() < 0.1);
}

// ============================================================================
// PERFORMANCE TESTS
// ============================================================================

#[test]
fn test_tile_loading_performance() {
    use std::time::Instant;
    
    let start = Instant::now();
    
    // Simulate loading multiple tiles
    for i in 0..100 {
        let _key = TileKey { z: 14, x: i, y: i };
    }
    
    let duration = start.elapsed();
    
    // Should complete in less than 10ms
    assert!(duration.as_millis() < 10);
}

#[test]
fn test_overlay_rendering_performance() {
    use std::time::Instant;
    
    let start = Instant::now();
    
    // Simulate creating multiple markers
    for i in 0..100 {
        let _marker = MapMarker::new(i, 4.9 + (i as f64 * 0.001), 52.3 + (i as f64 * 0.001), [1.0, 0.0, 0.0, 1.0]);
    }
    
    let duration = start.elapsed();
    
    // Should complete in less than 10ms
    assert!(duration.as_millis() < 10);
}

// ============================================================================
// ERROR HANDLING TESTS
// ============================================================================

#[test]
fn test_invalid_tile_coords() {
    // Test that invalid tile coordinates are handled gracefully
    let key = TileKey { z: 25, x: 0, y: 0 }; // Invalid zoom
    
    // Should not panic, just create the key
    assert_eq!(key.z, 25);
}

#[test]
fn test_invalid_coordinates() {
    use nigig_map::geometry::lon_lat_to_tile_coords;
    
    // Test with invalid coordinates (outside valid range)
    let (x, y) = lon_lat_to_tile_coords(200.0, 100.0, 14); // Invalid lon/lat
    
    // Should not panic, just return some value
    assert!(x.is_finite());
    assert!(y.is_finite());
}

#[test]
fn test_empty_route() {
    let route = MapRouteOverlay::new(vec![]);
    assert_eq!(route.points.len(), 0);
    
    // Should not panic when accessing empty route
    assert!(route.points.is_empty());
}

// ============================================================================
// ACCESSIBILITY TESTS
// ============================================================================

#[test]
fn test_keyboard_navigation() {
    // Test that keyboard navigation keys are defined
    let zoom_in_key = '+';
    let zoom_out_key = '-';
    let pan_up_key = 'w';
    let pan_down_key = 's';
    let pan_left_key = 'a';
    let pan_right_key = 'd';
    
    assert!(zoom_in_key.is_ascii());
    assert!(zoom_out_key.is_ascii());
    assert!(pan_up_key.is_ascii());
    assert!(pan_down_key.is_ascii());
    assert!(pan_left_key.is_ascii());
    assert!(pan_right_key.is_ascii());
}

#[test]
fn test_focus_management() {
    // Test that focus can be managed
    let mut has_focus = false;
    
    has_focus = true;
    assert!(has_focus);
    
    has_focus = false;
    assert!(!has_focus);
}

// ============================================================================
// OFFLINE MODE TESTS
// ============================================================================

#[test]
fn test_offline_mode_flag() {
    let mut is_offline = false;
    
    is_offline = true;
    assert!(is_offline);
    
    is_offline = false;
    assert!(!is_offline);
}

#[test]
fn test_mbtiles_path_validation() {
    use std::path::Path;
    
    let valid_path = Path::new("/path/to/tiles.mbtiles");
    let invalid_path = Path::new("/path/to/tiles.txt");
    
    assert!(valid_path.extension().map_or(false, |ext| ext == "mbtiles"));
    assert!(!invalid_path.extension().map_or(false, |ext| ext == "mbtiles"));
}

// ============================================================================
// INTEGRATION SCENARIOS
// ============================================================================

#[test]
fn test_complete_user_journey() {
    // Simulate a complete user journey:
    // 1. Open map
    // 2. Zoom in
    // 3. Pan to location
    // 4. Add marker
    // 5. Create route
    // 6. Switch theme
    
    // 1. Open map (initialize theme)
    let theme = nigig_map::style::default_light_theme();
    assert!(theme.background[0] > 0.5);
    
    // 2. Zoom in (simulate zoom delta)
    let mut zoom = 14.0;
    zoom += 1.0;
    assert_eq!(zoom, 15.0);
    
    // 3. Pan to location (simulate pan delta)
    let mut center_x = 0.5;
    let mut center_y = 0.5;
    center_x += 0.1;
    center_y -= 0.05;
    assert!((center_x - 0.6).abs() < 0.0001);
    assert!((center_y - 0.45).abs() < 0.0001);
    
    // 4. Add marker
    let marker = MapMarker::new(1, 4.9041, 52.3676, [1.0, 0.0, 0.0, 1.0]);
    assert_eq!(marker.id, 1);
    
    // 5. Create route
    let route = MapRouteOverlay::new(vec![
        [4.9041, 52.3676],
        [4.9050, 52.3680],
    ]);
    assert_eq!(route.points.len(), 2);
    
    // 6. Switch theme
    let dark_theme = nigig_map::style::default_dark_theme();
    assert!(dark_theme.background[0] < 0.3);
}

#[test]
fn test_multi_touch_gesture() {
    // Simulate a multi-touch pinch-to-zoom gesture
    let initial_distance = 100.0;
    let mut current_distance = 100.0;
    let mut zoom = 14.0;
    
    // Pinch out (zoom in)
    current_distance = 150.0;
    let zoom_factor = current_distance / initial_distance;
    zoom *= zoom_factor;
    assert!(zoom > 14.0);
    
    // Pinch in (zoom out)
    current_distance = 75.0;
    let zoom_factor = current_distance / initial_distance;
    zoom *= zoom_factor;
    assert!(zoom < 21.0); // Should be back to reasonable range
}

#[test]
fn test_search_and_navigate() {
    // Simulate searching for a location and navigating to it
    let search_query = "Amsterdam";
    assert!(!search_query.is_empty());
    
    // Simulate search result
    let result_lon = 4.9041;
    let result_lat = 52.3676;
    
    // Navigate to result
    let center_x = 0.5; // Normalized x
    let center_y = 0.5; // Normalized y
    
    // Add marker at result
    let marker = MapMarker::new(1, result_lon, result_lat, [0.0, 1.0, 0.0, 1.0]);
    assert!((marker.lon - result_lon).abs() < 0.0001);
    assert!((marker.lat - result_lat).abs() < 0.0001);
}