"""GET /api/dimensions.dspy — 获取维度树及权重"""
import json
from songrate.scenes import get_scene_config, SCENES, DIMENSIONS

scene = params_kw.get('scene', 'pop')
if scene not in SCENES:
    return json.dumps({"error": f"未知场景: {scene}", "available_scenes": list(SCENES.keys())}, ensure_ascii=False)

config = get_scene_config(scene)
weights = config["weights"]

# 构建维度树
tree = []
for dim_key, dim_info in DIMENSIONS.items():
    weight = weights.get(dim_key, 0)
    tree.append({
        "key": dim_key,
        "name": dim_info["name"],
        "weight": weight,
        "enabled": weight > 0,
        "sub_dimensions": dim_info["sub_dimensions"]
    })

# 按权重排序
tree.sort(key=lambda d: d["weight"], reverse=True)

return json.dumps({
    "scene": scene,
    "scene_name": config["name"],
    "dimensions": tree,
    "total_weight": round(sum(weights.values()), 2)
}, ensure_ascii=False)