import matplotlib.pyplot as plt
import numpy as np

plt.xkcd(scale=0.7, length=60, randomness=2)

FIG_W = 8
FIG_H = 5

# ── Chart 1: Context cost vs examples ──
fig1, ax1 = plt.subplots(figsize=(FIG_W, FIG_H))

N = [1, 5, 15, 36]
raw = [100, 500, 1500, 3600]  # ~100 tokens/example
dervish = [40, 60, 60, 200]   # grammar grows only when diversity grows

x = np.arange(len(N))
w = 0.35

bars1 = ax1.bar(x - w/2, raw, w, label='Raw examples', color='#e74c3c', alpha=0.85)
bars2 = ax1.bar(x + w/2, dervish, w, label='Dervish grammar', color='#3498db', alpha=0.85)

ax1.set_xticks(x)
ax1.set_xticklabels([f'{n} examples' for n in N])
ax1.set_ylabel('Tokens needed in context')
ax1.set_title('Context cost: raw examples vs Dervish grammar')
ax1.legend(frameon=False)

for bar in bars1:
    ax1.text(bar.get_x() + bar.get_width()/2, bar.get_height() + 80,
             f'{int(bar.get_height())}', ha='center', va='bottom', fontsize=9)
for bar in bars2:
    ax1.text(bar.get_x() + bar.get_width()/2, bar.get_height() + 80,
             f'{int(bar.get_height())}', ha='center', va='bottom', fontsize=9)

ax1.set_ylim(0, 4500)
fig1.tight_layout()
fig1.savefig('chart_context_cost.png', dpi=200)
plt.close(fig1)

# ── Chart 2: Tokens — Without vs With Dervish (per dataset) ──
fig2, ax2 = plt.subplots(figsize=(FIG_W, FIG_H))

datasets = ['Ansible Galaxy\n(15 roles)', 'Helm\n(6 configs)', 'Go lint\n(6 jobs)']
without = [5000, 3000, 900]
with_derv = [60, 40, 30]
ratios = [f'{int(w/d)}×' for w, d in zip(without, with_derv)]

x2 = np.arange(len(datasets))
w2 = 0.3

bw = ax2.bar(x2 - w2/2, without, w2, label='Without Dervish', color='#e74c3c', alpha=0.85)
bd = ax2.bar(x2 + w2/2, with_derv, w2, label='With Dervish', color='#3498db', alpha=0.85)

ax2.set_xticks(x2)
ax2.set_xticklabels(datasets)
ax2.set_ylabel('Tokens')
ax2.set_title('Token savings per dataset')
ax2.legend(frameon=False)
ax2.set_yscale('log')
ax2.set_ylim(5, 30000)

# Label compression ratios
for i, (r, wbar, dbar) in enumerate(zip(ratios, bw, bd)):
    ax2.text(x2[i], without[i] * 1.3, r, ha='center', va='bottom', fontsize=11, fontweight='bold',
             bbox=dict(boxstyle='round,pad=0.2', facecolor='white', edgecolor='gray', alpha=0.8))

fig2.tight_layout()
fig2.savefig('chart_token_savings.png', dpi=200)
plt.close(fig2)

print("Charts saved: chart_context_cost.png, chart_token_savings.png")
