#!/usr/bin/env python3
"""
从「知你客服12号」复制为「知你客服13号」：

- **画布**：去除自环边、合并重复的 source→target 边；统一锚点 sourceHandle=right、targetHandle=left；
  按从「开始」出发的分层布局重排节点坐标，减少交叉与「绕圈」观感（不改变节点 id/业务配置）。
- **提示词**：在 12 号能力（http_request、file_read、file_write、system_info）基础上，增加工具调用纪律
  （避免同轮重复 file_write、勿刷屏 DSML）。

若已存在同名 Agent「知你客服13号」，则仅更新其 workflow + 描述（不新建）。

用法:
  cd backend && .\\venv\\Scripts\\python.exe scripts/create_zhini_kefu_13.py

环境变量: PLATFORM_BASE_URL, PLATFORM_USERNAME, PLATFORM_PASSWORD,
          SOURCE_AGENT_NAME（默认 知你客服12号）, TARGET_NAME（默认 知你客服13号）
"""
from __future__ import annotations

import copy
import json
import os
import sys
from collections import defaultdict
from typing import Any, Dict, List, Optional, Tuple

import requests

BASE = os.getenv("PLATFORM_BASE_URL", "http://127.0.0.1:8037").rstrip("/")
USER = os.getenv("PLATFORM_USERNAME", "admin")
PWD = os.getenv("PLATFORM_PASSWORD", "123456")
SOURCE_NAME = os.getenv("SOURCE_AGENT_NAME", "知你客服12号")
TARGET_NAME = os.getenv("TARGET_NAME", "知你客服13号")

TOOLS_V13 = ["http_request", "file_read", "file_write", "system_info"]

# 在 12 号提示词基础上追加（create_zhini_kefu_12 正文过长时由脚本从源 Agent 读取再拼接）
PROMPT_V13_EXTRA = """

【画布/执行说明（13 号）】
- 工作流连线已整理为从左到右主线，减少自环与重复边带来的误解；逻辑仍以引擎与节点配置为准。

【工具调用纪律（13 号）】
- 同一轮用户请求中，对 **file_write** 无特殊说明时不要重复调用多次；每个明确文件需求通常 **一次写入** 即可。
- 不要在回复正文中 **重复刷屏** DSML、`<｜DSML｜`、`invoke name=` 等标签行；工具返回后应用自然语言说明，并仍以 **单行 JSON** 收尾。
- 若上一轮已写入成功，除非用户要求修改或另存，不要再次写入相同路径。

【单行 JSON 与用户画像（与 12 号一致，勿留空）】
- 最后一行 JSON 的 user_profile 须与事实一致：用户已告知昵称时须包含 "name"（如「小七」）；**禁止**用空的 user_profile 覆盖会话记忆。
- 仅靠 file_write 写入本地文件**不能**替代上述 JSON 中的 user_profile；多轮称呼以 JSON + 会话记忆为准。
"""


def _sanitize_edges(edges: List[Dict[str, Any]]) -> List[Dict[str, Any]]:
    """去掉自环、按 (source,target) 去重，统一左右锚点。"""
    seen: set = set()
    out: List[Dict[str, Any]] = []
    for e in edges or []:
        s, t = e.get("source"), e.get("target")
        if not s or not t:
            continue
        if s == t:
            continue
        key = (s, t)
        if key in seen:
            continue
        seen.add(key)
        ne = dict(e)
        ne["sourceHandle"] = "right"
        ne["targetHandle"] = "left"
        if not ne.get("id"):
            ne["id"] = f"edge_{s}_{t}"
        out.append(ne)
    return out


def _find_start_node_ids(nodes: List[Dict[str, Any]]) -> List[str]:
    ids: List[str] = []
    for n in nodes or []:
        nid = n.get("id") or ""
        nt = (n.get("type") or (n.get("data") or {}).get("type") or "").lower()
        if nt == "start" or nid in ("start", "start-1") or str(nid).startswith("start-"):
            ids.append(nid)
    return ids


def _compute_ranks(
    nodes: List[Dict[str, Any]], edges: List[Dict[str, Any]]
) -> Dict[str, int]:
    node_ids = [n["id"] for n in nodes if n.get("id")]
    start_ids = _find_start_node_ids(nodes)
    incoming: Dict[str, int] = {nid: 0 for nid in node_ids}
    for e in edges:
        s, t = e.get("source"), e.get("target")
        if not s or not t or s == t:
            continue
        if t in incoming:
            incoming[t] += 1
    if not start_ids:
        start_ids = [nid for nid in node_ids if incoming.get(nid, 0) == 0] or ([node_ids[0]] if node_ids else [])

    rank: Dict[str, int] = {s: 0 for s in start_ids}
    nmax = max(len(nodes), 8)
    for _ in range(nmax + 5):
        updated = False
        for e in edges:
            s, t = e.get("source"), e.get("target")
            if not s or not t or s == t:
                continue
            if s not in rank:
                continue
            nv = rank[s] + 1
            if t not in rank or rank[t] < nv:
                rank[t] = nv
                updated = True
        if not updated:
            break
    max_r = max(rank.values(), default=0)
    for nid in node_ids:
        if nid not in rank:
            rank[nid] = max_r + 1
            max_r += 1
    return rank


def _apply_layered_positions(nodes: List[Dict[str, Any]], ranks: Dict[str, int]) -> None:
    layers: Dict[int, List[str]] = defaultdict(list)
    for nid, r in ranks.items():
        layers[r].append(nid)
    for r in layers:
        layers[r].sort()

    x0, y0 = 80.0, 140.0
    x_step = 300.0
    y_step = 110.0

    for r in sorted(layers.keys()):
        ids = layers[r]
        nlen = len(ids)
        y_base = y0 - (nlen - 1) * y_step / 2.0
        for j, nid in enumerate(ids):
            for node in nodes:
                if node.get("id") != nid:
                    continue
                pos = node.setdefault("position", {})
                pos["x"] = x0 + r * x_step
                pos["y"] = y_base + j * y_step
                break


def improve_workflow_layout_and_edges(wf: Dict[str, Any]) -> Tuple[int, int]:
    """
    返回 (去掉的自环条数, 去掉的重复边条数)。
    """
    nodes = wf.get("nodes") or []
    raw_edges = wf.get("edges") or []
    loops = sum(
        1
        for e in raw_edges
        if e.get("source") and e.get("target") and e.get("source") == e.get("target")
    )
    clean = _sanitize_edges(raw_edges)
    removed_dup = len(raw_edges) - len(clean) - loops

    wf["edges"] = clean

    ranks = _compute_ranks(nodes, clean)
    _apply_layered_positions(nodes, ranks)
    return loops, max(0, removed_dup)


def _patch_llm_unified(wf: dict, base_prompt: Optional[str] = None) -> None:
    for n in wf.get("nodes") or []:
        if n.get("id") != "llm-unified":
            continue
        d = n.setdefault("data", {})
        prompt = base_prompt if base_prompt else d.get("prompt") or ""
        if PROMPT_V13_EXTRA.strip() not in prompt:
            prompt = (prompt.rstrip() + "\n" + PROMPT_V13_EXTRA).strip()
        d["prompt"] = prompt
        d["enable_tools"] = True
        d["tools"] = list(TOOLS_V13)
        d["selected_tools"] = list(TOOLS_V13)
        return
    print("警告: 未找到节点 llm-unified", file=sys.stderr)


def _find_agent_id_by_name(h: Dict[str, str], name: str) -> Optional[str]:
    r = requests.get(f"{BASE}/api/v1/agents", params={"search": name, "limit": 50}, headers=h, timeout=30)
    if r.status_code != 200:
        return None
    for a in r.json() or []:
        if a.get("name") == name:
            return a.get("id")
    return None


def main() -> int:
    r = requests.post(
        f"{BASE}/api/v1/auth/login",
        data={"username": USER, "password": PWD},
        headers={"Content-Type": "application/x-www-form-urlencoded"},
        timeout=15,
    )
    if r.status_code != 200:
        print("登录失败:", r.status_code, r.text[:500], file=sys.stderr)
        return 1
    token = r.json().get("access_token")
    if not token:
        print("无 access_token", file=sys.stderr)
        return 1
    h = {"Authorization": f"Bearer {token}", "Content-Type": "application/json"}

    src_id = _find_agent_id_by_name(h, SOURCE_NAME)
    if not src_id:
        print(f"未找到源 Agent: {SOURCE_NAME}", file=sys.stderr)
        return 1

    existing_13 = _find_agent_id_by_name(h, TARGET_NAME)
    if existing_13:
        print("已存在", TARGET_NAME, "-> 仅更新工作流", existing_13)
        new_id = existing_13
        g = requests.get(f"{BASE}/api/v1/agents/{new_id}", headers=h, timeout=30)
        if g.status_code != 200:
            print("读取失败:", g.text, file=sys.stderr)
            return 1
        agent = g.json()
    else:
        dup = requests.post(
            f"{BASE}/api/v1/agents/{src_id}/duplicate",
            headers=h,
            json={"name": TARGET_NAME},
            timeout=60,
        )
        if dup.status_code != 201:
            print("复制失败:", dup.status_code, dup.text[:800], file=sys.stderr)
            return 1
        new_id = dup.json()["id"]
        agent = dup.json()
        print("已创建副本:", new_id, TARGET_NAME)

    wf = copy.deepcopy(agent["workflow_config"])
    loops, dup_edges = improve_workflow_layout_and_edges(wf)
    print(f"连线整理: 去掉自环 {loops} 条, 合并重复边 {dup_edges} 条")

    g2 = requests.get(f"{BASE}/api/v1/agents/{src_id}", headers=h, timeout=30)
    base_prompt = None
    if g2.status_code == 200:
        try:
            for n in g2.json().get("workflow_config", {}).get("nodes") or []:
                if n.get("id") == "llm-unified":
                    base_prompt = (n.get("data") or {}).get("prompt")
                    break
        except Exception:
            pass
    _patch_llm_unified(wf, base_prompt=base_prompt)

    desc = (
        "在知你客服12号基础上：整理工作流连线（去自环/重复边、分层布局、统一左右锚点），"
        "并强化工具调用纪律（避免同轮重复 file_write、勿刷屏 DSML）；"
        "工具仍为 http_request、file_read、file_write、system_info；输出单行 JSON。"
    )

    up = requests.put(
        f"{BASE}/api/v1/agents/{new_id}",
        headers=h,
        json={"description": desc, "workflow_config": wf},
        timeout=120,
    )
    if up.status_code != 200:
        print("更新失败:", up.status_code, up.text[:1200], file=sys.stderr)
        return 1
    print("已写入工具:", ", ".join(TOOLS_V13))
    print("Agent ID:", new_id)
    print(json.dumps({"id": new_id, "name": TARGET_NAME}, ensure_ascii=False))
    return 0


if __name__ == "__main__":
    raise SystemExit(main())