"""多视角图生 3D — multi-view to model.

    tripocli multiview --front f.png --left l.png --right r.png --back b.png --wait -o mv.glb

Verified against the live API: the ``image`` field must be a list of exactly four
audited image objects; fewer than four is rejected with "Invalid parameter(s)".
"""

from . import _common
from ..errors import TripoAPIError
from ..versions import SMART_MESH_DEFAULT

NAME = "multiview"
HELP = "多视角图片生成 3D 模型（前/左/右/后，必须 4 张）"

VIEWS = ("front", "left", "right", "back")


def add_arguments(parser):
    parser.add_argument("--front", required=True, help="前视图本地图片")
    parser.add_argument("--left", required=True, help="左视图本地图片")
    parser.add_argument("--right", required=True, help="右视图本地图片")
    parser.add_argument("--back", required=True, help="后视图本地图片")
    _common.add_generation_options(parser)
    _common.add_wait_options(parser, "生成完成后保存的 .glb 路径")


def run(ctx):
    args = ctx.args
    paths = [getattr(args, name) for name in VIEWS]

    # Multi-view is a smart-mesh workflow by default; keep the low-poly topology
    # unless the caller explicitly asked for something else.
    if not args.smart_mesh and not args.model:
        args.smart_mesh = True
    if not args.model:
        args.model = SMART_MESH_DEFAULT

    images = []
    for name, path in zip(VIEWS, paths):
        ctx.out.line(f"📤 上传 {name} 视图: {path}")
        images.append(ctx.client.upload_image(path))

    if len(images) != 4:
        raise TripoAPIError("多视角生成需要恰好 4 张图片 (--front/--left/--right/--back)")

    body = _common.generation_body(args)
    data = ctx.client.get_data(
        "POST", "/v2/studio/operation/multiview_to_model", body={"image": images, **body}
    )
    return _common.finish_single(ctx, data, output=args.output, wait=args.wait)