from pathlib import Path

import matplotlib
from matplotlib import font_manager
import matplotlib.pyplot as plt


plt.rcParams.update(
    {
        "font.family": ["DejaVu Serif", "serif"],
        "font.size": 12,
        "axes.titlesize": 15,
        "axes.labelsize": 12,
        "xtick.labelsize": 10,
        "ytick.labelsize": 10,
    }
)

requested_family = plt.rcParams["font.family"]
resolved_font = font_manager.findfont(
    font_manager.FontProperties(family=requested_family),
    fallback_to_default=False,
)

quarters = ["Q1", "Q2", "Q3", "Q4"]
satisfaction = [82, 86, 88, 91]

fig, ax = plt.subplots(figsize=(6.4, 3.8), layout="constrained")
ax.plot(quarters, satisfaction, marker="o", linewidth=2.2, color="#3E6C9A")
title = ax.set_title("Customer satisfaction trend", fontweight="bold")
xlabel = ax.set_xlabel("Quarter")
ylabel = ax.set_ylabel("Score")
ax.grid(True, axis="y", alpha=0.25)

output = Path("font-configure.png")
fig.savefig(output, dpi=160)
plt.close(fig)

print(f"matplotlib {matplotlib.__version__} ({matplotlib.get_backend()} backend)")
print(f"font family: {requested_family}")
print(f"resolved font: {Path(resolved_font).name}")
print(f"title font: {title.get_fontfamily()} {title.get_fontsize():.0f} pt")
print(f"x label font: {xlabel.get_fontfamily()} {xlabel.get_fontsize():.0f} pt")
print(f"y label font: {ylabel.get_fontfamily()} {ylabel.get_fontsize():.0f} pt")
print(f"saved: {output}")
print(f"bytes: {output.stat().st_size}")