"""图片智能抠图/切分 — auto cutout / split image.

    tripocli img-split -a <asset_id> --wait -o ./cutout.png
    tripocli img-split (自动取最新一张参考图抠图)

实测流程（页面上剪刀图标抓到的请求）：
    POST /v2/studio/image/split
    {"asset_id": "...", "resource_key": "generate-image/..."}
      → {"task_id": "...", "asset_id": "..."}

轮询：
    POST /v2/studio/image/get_image_asset  {"asset_id": "..."}
      → status == "success", type == "split_image", output.data[0].url
"""

import os
import time

from ..errors import TripoAPIError, TripoTimeout
from .image_upscale import resolve_asset_and_key

NAME = "img-split"
HELP = "图片智能抠图/切分：主体背景去除与透明化（对应网页端剪刀按钮）"


def add_arguments(parser):
    parser.add_argument("-a", "--asset", help="图片资产 ID（默认自动取最近生成的一张）")
    parser.add_argument("--key", help="指定图片 resource_key（默认自动解析）")
    parser.add_argument("-w", "--wait", action="store_true", default=True, help="等待抠图完成（默认等待）")
    parser.add_argument("--no-wait", dest="wait", action="store_false", help="不等待，提交后直接退出")
    parser.add_argument("-o", "--output", help="抠图后的图片保存路径")
    parser.add_argument("--timeout", type=int, default=180, help="等待超时秒数（默认 180）")


def run(ctx):
    args = ctx.args
    asset_id, key = resolve_asset_and_key(ctx, args.asset, args.key)
    ctx.out.line(f"✂️ 提交智能抠图任务: asset={asset_id}")

    resp = ctx.client.get_data("POST", "/v2/studio/image/split", body={
        "asset_id": asset_id,
        "resource_key": key,
    }) or {}

    new_asset_id = resp.get("asset_id") or resp.get("task_id")
    if not new_asset_id:
        raise TripoAPIError(f"split 未返回 asset_id: {resp}")

    if not args.wait:
        ctx.out.data(resp, human=lambda: ctx.out.line(f"✅ 任务已提交，asset_id: {new_asset_id}"))
        return resp

    ctx.out.line(f"⏳ 等待智能抠图完成: {new_asset_id}")
    start = time.time()
    while time.time() - start < args.timeout:
        info = ctx.client.get_data("POST", "/v2/studio/image/get_image_asset", body={"asset_id": new_asset_id}) or {}
        status = info.get("status")
        if status == "success":
            ctx.out.line("🎉 智能抠图完成！")
            out_imgs = (info.get("output") or {}).get("data") or []
            url = out_imgs[0].get("url") if out_imgs else None
            if url:
                ctx.out.line(f"抠图结果地址: {url}")
                if args.output:
                    save_path = args.output
                    if os.path.isdir(save_path):
                        save_path = os.path.join(save_path, f"{new_asset_id}_cutout.webp")
                    ctx.client.download_file(url, save_path)
                    ctx.out.line(f"💾 已保存到: {save_path}")
            return info
        if status in ("failed", "expired"):
            raise TripoAPIError(f"智能抠图失败: status={status}")
        time.sleep(2)

    raise TripoTimeout(f"智能抠图超时（超过 {args.timeout} 秒）")