"""单独渲染项目节点的两条自回边，便于核对 包含/续签自 关系。"""

from __future__ import annotations

import matplotlib

matplotlib.use("Agg")
import matplotlib.pyplot as plt


OUT = r"E:\CODE\knowledge_agent\meta_graph_project_self_loops.png"


def main() -> None:
    fig, ax = plt.subplots(figsize=(7, 5))
    ax.scatter([0], [0], s=3600, c="#4C9F70", edgecolors="white", linewidths=2)
    ax.text(0, 0, "项目", ha="center", va="center", color="white", fontsize=14,
            family="Microsoft YaHei")

    items = [
        ("包含\n(层级序号 父→子)", "#2E75B6", 0.55, 0.38),
        ("续签自\n(续签前项目编号)", "#C55A11", -0.55, -0.38),
    ]
    for label, color, rad, dy in items:
        ax.annotate(
            "",
            xy=(0.16, dy),
            xytext=(-0.16, dy),
            arrowprops=dict(
                arrowstyle="-|>",
                color=color,
                lw=3,
                connectionstyle=f"arc3,rad={rad}",
                mutation_scale=22,
            ),
        )
        ax.text(0, dy + (0.58 if dy > 0 else -0.58), label, ha="center", va="center",
                fontsize=10, family="Microsoft YaHei", color=color)

    ax.set_xlim(-1.6, 1.6)
    ax.set_ylim(-1.6, 1.6)
    ax.set_aspect("equal")
    ax.axis("off")
    ax.set_title("项目自回边：包含 / 续签自", family="Microsoft YaHei", fontsize=15)
    fig.tight_layout()
    fig.savefig(OUT, dpi=150, bbox_inches="tight")
    print(OUT)


if __name__ == "__main__":
    main()