"""测试 BFL FLUX 异步生图 — 通过 Router POST /run_tool

官方流程：先 POST 提交任务拿到 id + polling_url，再轮询 polling_url 直至 Ready。
文档: https://docs.bfl.ai/quick_start/generating_images

用法：
    1. 配置 tools/local/flux/.env：BFL_API_KEY
    2. uv run python -m tool_agent
    3. uv run python tests/test_flux.py

模型切换：
    FLUX_TEST_MODEL=flux-2-max uv run python tests/test_flux.py
    （model 为路径段，如 flux-2-pro-preview、flux-2-pro、flux-dev 等，见官方 Available Endpoints）

环境变量：
    TOOL_AGENT_ROUTER_URL   默认 http://127.0.0.1:8001
    FLUX_SUBMIT_TOOL_ID     默认 flux_submit
    FLUX_QUERY_TOOL_ID      默认 flux_query
    FLUX_TEST_MODEL         默认 flux-2-pro-preview
    FLUX_TEST_PROMPT        覆盖默认短提示词
    FLUX_POLL_INTERVAL_S    默认 1.0
    FLUX_POLL_MAX_WAIT_S    默认 300
"""

from __future__ import annotations

import io
import os
import sys
import time
from typing import Any

if sys.platform == "win32":
    _out = sys.stdout
    if isinstance(_out, io.TextIOWrapper):
        _out.reconfigure(encoding="utf-8")

import httpx

ROUTER_URL = os.environ.get("TOOL_AGENT_ROUTER_URL", "http://127.0.0.1:8001")
SUBMIT_TOOL = os.environ.get("FLUX_SUBMIT_TOOL_ID", "flux_submit")
QUERY_TOOL = os.environ.get("FLUX_QUERY_TOOL_ID", "flux_query")
FLUX_MODEL = os.environ.get("FLUX_TEST_MODEL", "flux-2-pro-preview").strip()
TEST_PROMPT = os.environ.get(
    "FLUX_TEST_PROMPT",
    "A tiny red apple on white background, simple product photo, minimal",
)
POLL_INTERVAL_S = float(os.environ.get("FLUX_POLL_INTERVAL_S", "1.0"))
POLL_MAX_WAIT_S = float(os.environ.get("FLUX_POLL_MAX_WAIT_S", "300"))


def run_tool(tool_id: str, params: dict[str, Any], timeout: float = 120.0) -> dict[str, Any]:
    resp = httpx.post(
        f"{ROUTER_URL}/run_tool",
        json={"tool_id": tool_id, "params": params},
        timeout=timeout,
    )
    resp.raise_for_status()
    body = resp.json()
    if body.get("status") != "success":
        raise RuntimeError(body.get("error") or str(body))
    result = body.get("result")
    if isinstance(result, dict) and result.get("status") == "error":
        raise RuntimeError(result.get("error", str(result)))
    return result if isinstance(result, dict) else {}


def _poll_terminal_success(data: dict[str, Any]) -> bool:
    s = str(data.get("status") or "").strip()
    return s.lower() == "ready"


def _poll_terminal_failure(data: dict[str, Any]) -> bool:
    s = str(data.get("status") or "").strip().lower()
    return s in ("error", "failed")


def _sample_url(data: dict[str, Any]) -> str | None:
    r = data.get("result")
    if isinstance(r, dict):
        u = r.get("sample")
        if isinstance(u, str) and u.startswith("http"):
            return u
    return None


def main() -> None:
    print("=" * 50)
    print("测试 FLUX（BFL 异步 API + 模型可切换）")
    print("=" * 50)
    print(f"ROUTER_URL: {ROUTER_URL}")
    print(f"model:      {FLUX_MODEL}")

    try:
        r = httpx.get(f"{ROUTER_URL}/health", timeout=3)
        print(f"Router 状态: {r.json()}")
    except httpx.ConnectError:
        print(f"无法连接 Router ({ROUTER_URL})，请先: uv run python -m tool_agent")
        sys.exit(1)

    print("\n--- 校验工具已注册 ---")
    tr = httpx.get(f"{ROUTER_URL}/tools", timeout=30)
    tr.raise_for_status()
    tools = tr.json().get("tools", [])
    ids = {t["tool_id"] for t in tools}
    for tid in (SUBMIT_TOOL, QUERY_TOOL):
        if tid not in ids:
            print(f"错误: {tid!r} 不在 GET /tools 中。示例 id: {sorted(ids)[:20]}...")
            sys.exit(1)
        meta = next(t for t in tools if t["tool_id"] == tid)
        print(f"  {tid}: {meta.get('name', '')} (state={meta.get('state')})")

    props = (next(t for t in tools if t["tool_id"] == SUBMIT_TOOL).get("input_schema") or {}).get(
        "properties"
    ) or {}
    if "model" in props:
        print("  flux_submit input_schema 已声明 model")
    else:
        print("  提示: flux_submit 宜在注册表中声明 model 以便切换端点")

    print("\n--- flux_submit ---")
    submit_params: dict[str, Any] = {
        "model": FLUX_MODEL,
        "prompt": TEST_PROMPT,
        "width": 512,
        "height": 512,
    }
    try:
        sub = run_tool(SUBMIT_TOOL, submit_params, timeout=120.0)
    except (RuntimeError, httpx.HTTPError) as e:
        print(f"错误: {e}")
        sys.exit(1)

    print(f"提交返回 keys: {list(sub.keys())}")
    req_id = sub.get("id") or sub.get("request_id")
    poll_url = sub.get("polling_url")
    if not req_id or not poll_url:
        print(f"错误: 缺少 id 或 polling_url: {sub}")
        sys.exit(1)
    print(f"request id: {req_id}")
    print(f"polling_url: {poll_url[:80]}...")

    print("\n--- flux_query 轮询 ---")
    deadline = time.monotonic() + POLL_MAX_WAIT_S
    last: dict[str, Any] = {}

    while time.monotonic() < deadline:
        time.sleep(POLL_INTERVAL_S)
        try:
            last = run_tool(
                QUERY_TOOL,
                {"polling_url": str(poll_url), "request_id": str(req_id)},
                timeout=60.0,
            )
        except (RuntimeError, httpx.HTTPError) as e:
            print(f"轮询错误: {e}")
            sys.exit(1)

        st = last.get("status")
        print(f"  status: {st}")

        if _poll_terminal_failure(last):
            print(f"生成失败: {last}")
            sys.exit(1)
        if _poll_terminal_success(last):
            url = _sample_url(last)
            if url:
                print(f"\n图片 URL（signed，约 10 分钟内有效）: {url[:100]}...")
            print("\n测试通过!")
            return

    print(f"\n等待超时 ({POLL_MAX_WAIT_S}s)，最后一次: {last}")
    sys.exit(1)


if __name__ == "__main__":
    main()