#!/usr/bin/env python3
"""Verify header visibility across all themes."""
# ruff: noqa: E402

import sys
import tkinter as tk
from pathlib import Path

# Ensure the 'src' directory is on sys.path so 'thechart' package is importable
SRC_DIR = Path(__file__).resolve().parent.parent / "src"
if str(SRC_DIR) not in sys.path:
    sys.path.insert(0, str(SRC_DIR))

from thechart.core.constants import LOG_LEVEL
from thechart.core.logger import init_logger
from thechart.ui import ThemeManager

logger = init_logger(__name__, testing_mode=(LOG_LEVEL == "DEBUG"))


def verify_all_themes():
    """Verify header visibility for all themes."""
    print("=== HEADER VISIBILITY VERIFICATION ===\n")

    root = tk.Tk()
    root.withdraw()  # Hide window

    theme_manager = ThemeManager(root, logger)
    available_themes = theme_manager.get_available_themes()

    print(f"Testing {len(available_themes)} themes...")
    print("-" * 50)

    for theme in available_themes:
        print(f"\n🎨 {theme.upper()} THEME")

        # Apply theme
        success = theme_manager.apply_theme(theme)
        if not success:
            print("❌ Failed to apply theme")
            continue

        # Get colors
        colors = theme_manager.get_theme_colors()
        header_colors = theme_manager._get_contrasting_colors(colors)

        # Calculate contrast ratio
        def get_luminance(color_str):
            """Calculate relative luminance."""
            if not color_str or not color_str.startswith("#"):
                return 0.5
            try:
                rgb = tuple(int(color_str[i : i + 2], 16) for i in (1, 3, 5))
                return (0.299 * rgb[0] + 0.587 * rgb[1] + 0.114 * rgb[2]) / 255
            except (ValueError, IndexError):
                return 0.5

        bg_lum = get_luminance(header_colors["header_bg"])
        fg_lum = get_luminance(header_colors["header_fg"])
        lighter = max(bg_lum, fg_lum)
        darker = min(bg_lum, fg_lum)
        contrast_ratio = (lighter + 0.05) / (darker + 0.05)

        if contrast_ratio >= 4.5:
            status = "✅ EXCELLENT"
        elif contrast_ratio >= 3.0:
            status = "✅ GOOD"
        elif contrast_ratio >= 2.0:
            status = "⚠️  FAIR"
        else:
            status = "❌ POOR"

        print(f"   Header: {header_colors['header_bg']} / {header_colors['header_fg']}")
        print(f"   Contrast: {contrast_ratio:.2f}:1 {status}")

    print("\n" + "=" * 50)
    print("✅ Header visibility verification complete!")
    print("All themes should now have readable table headers.")

    root.destroy()


if __name__ == "__main__":
    verify_all_themes()