#!/usr/bin/env python3
"""bazaar.abaj.ai favicon — the curved gold diamond ✦ alone, transparent ground.

Replaces the orb as the site icon (the orb remains documented on the site's
Icons page as an experiment). Same curved-diamond path as the orb's centre.
"""

import matplotlib

matplotlib.use('Agg')
import matplotlib.pyplot as plt
from matplotlib.path import Path as MPath
from matplotlib.patches import PathPatch


def curved_diamond(cx, cy, r, waist=0.30):
    tips = [(cx, cy + r), (cx + r, cy), (cx, cy - r), (cx - r, cy)]
    verts, codes = [tips[0]], [MPath.MOVETO]
    for i in range(4):
        a, b = tips[i], tips[(i + 1) % 4]
        mx, my = (a[0] + b[0]) / 2, (a[1] + b[1]) / 2
        ctrl = (cx + (mx - cx) * waist, cy + (my - cy) * waist)
        verts += [ctrl, b]
        codes += [MPath.CURVE3, MPath.CURVE3]
    return MPath(verts, codes)


fig = plt.figure(figsize=(8.5, 8.5), dpi=72)
ax = fig.add_axes([0, 0, 1, 1])
ax.set_xlim(-1, 1)
ax.set_ylim(-1, 1)
ax.set_aspect('equal')
ax.axis('off')

# soft gold glow behind, then the diamond in the bazaar's gold
for r, alpha in [(0.98, 0.05), (0.92, 0.07)]:
    ax.add_patch(PathPatch(curved_diamond(0, 0, r), fc='#c9a227', ec='none', alpha=alpha))
ax.add_patch(
    PathPatch(curved_diamond(0, 0, 0.88), fc='#b8860b', ec='#8a6a08',
              lw=3.0, joinstyle='round')
)

fig.savefig('diamond.png', transparent=True, dpi=150)  # 1275px master
print('wrote diamond.png')