import matplotlib.pyplot as plt
from matplotlib.patches import Patch
import numpy as np
from scipy.interpolate import make_interp_spline

# 1. OATP1B1 Inhibitor Facts
bin_centers = [0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 
               0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95, 1.0]

frequencies = [0.16, 0.61, 0.77, 0.85, 1.17, 1.70, 1.58, 1.94, 
               2.55, 3.76, 5.54, 6.80, 7.85, 11.57, 28.36, 24.80]

# 2. Smoothing
x_smooth = np.linspace(min(bin_centers), max(bin_centers), 300)
spl = make_interp_spline(bin_centers, frequencies, k=3)
y_smooth = spl(x_smooth)
y_smooth = [val if val > 0 else 0 for val in y_smooth] 

# 3. Colors
colors = []
for val in bin_centers:
    if val < 0.5:
        colors.append('lightgray')
    elif val < 0.8:
        colors.append('orange')
    else:
        colors.append('firebrick')

# 4. Create the chart
plt.figure(figsize=(7, 6))

# Bars
plt.bar(bin_centers, frequencies, width=0.04, color=colors, edgecolor='black', alpha=0.8, label='Data Frequency')

# 5. Tags and Titles
plt.xlabel('Probability of OATP1B1 Inhibition', fontsize=12)
plt.ylabel('% Frequency', fontsize=12)
plt.title('OATP1B1 Inhibition Potential (Hepatic Uptake Interaction)', fontsize=14)

# Axle settings
plt.xticks(np.arange(0.2, 1.05, 0.1))
plt.xlim(0.2, 1.05)
plt.ylim(0, 32)

# 6. Legend
legend_elements = [
    Patch(facecolor='lightgray', edgecolor='black', label='Low Inhibition Potential (< 0.5)'),
    Patch(facecolor='orange', edgecolor='black', label='Moderate Potential (0.5 - 0.8)'),
    Patch(facecolor='firebrick', edgecolor='black', label='High Inhibition Potential (> 0.8)'),
]

plt.legend(handles=legend_elements, loc='upper left', framealpha=0.95)

plt.grid(axis='y', linestyle='--', alpha=0.5)
plt.tight_layout()

plt.show()