"""@mention 解析工具模块。供所有 toolchain handler 复用。"""

import re
import logging
from typing import List, Set

from src.config.agents import AGENT_IDS

logger = logging.getLogger(__name__)

# Gitea API 基地址常量（避免硬编码）
GITEA_API_BASE = "http://192.168.2.154:3000/api/v1"
GITEA_WEB_BASE = "http://192.168.2.154:3000"

# Agent 别名映射
# 规则：
# 1. 中文名（如"张飞"）→ 完整 Agent ID
# 2. 英文短名（如"zhangfei"）→ 完整 Agent ID
# 3. 前缀模糊匹配需唯一匹配（见 extract_mentions 假设 A2）
AGENT_ALIAS: dict[str, str] = {
    # 中文名
    "张飞": "zhangfei-dev",
    "关羽": "guanyu-dev",
    "赵云": "zhaoyun-data",
    "姜维": "jiangwei-infra",
    "司马懿": "simayi-challenger",
    "庞统": "pangtong-fujunshi",
    # 字+号（常见写法）
    "翼德": "zhangfei-dev",
    "云长": "guanyu-dev",
    "子龙": "zhaoyun-data",
    "伯约": "jiangwei-infra",
    "仲达": "simayi-challenger",
    "士元": "pangtong-fujunshi",
    # 英文短名
    "zhangfei": "zhangfei-dev",
    "guanyu": "guanyu-dev",
    "zhaoyun": "zhaoyun-data",
    "jiangwei": "jiangwei-infra",
    "simayi": "simayi-challenger",
    "pangtong": "pangtong-fujunshi",
}

# 正则：匹配 @后面跟着的合法 Agent 名（英文字母/中文/数字/连字符）
_MENTION_PATTERN = re.compile(r"@([a-zA-Z\u4e00-\u9fa5][a-zA-Z0-9\u4e00-\u9fff-]*)")


def extract_mentions(body: str, sender: str) -> list[str]:
    """从文本中提取 @mention 的 Agent ID 列表。

    Args:
        body: 评论文本
        sender: 评论者 Gitea 用户名（用于排除自己 @自己）

    Returns:
        去重后的 Agent ID 列表

    匹配优先级：精确 > 别名 > 前缀模糊（需唯一匹配，多候选则跳过）
    """
    candidates = _MENTION_PATTERN.findall(body)
    result: Set[str] = set()

    for c in candidates:
        # 1. 精确匹配（@zhangfei-dev）
        if c in AGENT_IDS:
            result.add(c)
        # 2. 别名匹配（@张飞、@zhangfei）
        elif c in AGENT_ALIAS:
            result.add(AGENT_ALIAS[c])
        else:
            # 3. 前缀模糊匹配（@zhangf → zhangfei-dev）
            #    假设 A2：多个候选时不匹配，只 log warning
            matches = [aid for aid in AGENT_IDS if aid.startswith(c)]
            if len(matches) == 1:
                result.add(matches[0])
            elif len(matches) > 1:
                logger.warning(
                    "Prefix '%s' matched %d agents (%s), skipping ambiguous mention",
                    c, len(matches), matches)

    # 排除自己 @自己（假设 A1：Gitea login = Agent ID）
    result.discard(sender)
    return list(result)


def should_suppress_mention(
    mentioned_agent: str,
    auto_notify_targets: List[str],
) -> bool:
    """判断 @mention 通知是否应被抑制（因为自动流转已通知同一人）。

    Args:
        mentioned_agent: 被 @的 Agent ID
        auto_notify_targets: 本次事件自动流转已通知的目标列表

    Returns:
        True 表示应抑制（不发 @mention Mail）
    """
    return mentioned_agent in auto_notify_targets


def infer_intent(body: str) -> str:
    """从 @mention 内容推断意图。

    Returns:
        "help" | "notify" | "collaborate" | "assign"
    """
    # 分配子任务关键词
    assign_keywords = ["交给", "分配", "负责", "认领", "做一下", "帮忙做", "implement"]
    if any(kw in body for kw in assign_keywords):
        return "assign"

    # 求助关键词（注意："帮忙"已由 assign_keywords 的"帮忙做"覆盖，"请帮忙"由 collab_keywords 覆盖）
    help_keywords = ["怎么", "如何", "？", "?", "什么", "哪个", "能否"]
    if any(kw in body for kw in help_keywords):
        return "help"

    # 协作请求关键词
    collab_keywords = ["请帮忙", "请协助", "请澄清", "请review", "请审查", "评估"]
    if any(kw in body for kw in collab_keywords):
        return "collaborate"

    # 默认为通知关注
    return "notify"


def _build_response_guidance(
    intent: str,
    gitea_api: str,
    repo: str,
    issue_number: int,
    commenter: str,
) -> str:
    """根据意图类型生成响应指引文本。"""
    if intent == "help":
        return (
            f"这是一条求助，请到 Gitea 评论回复：\n"
            f"1. 获取评论上下文（上方 API）\n"
            f"2. 组织回答\n"
            f"3. 在 Gitea 评论回复: POST {gitea_api}/repos/{repo}/issues/{issue_number}/comments\n"
            f'   Body: {{"body": "你的回答内容"}}'
        )
    elif intent == "notify":
        return (
            f"这是一条通知，请查看并知晓。如有意见，可到 Gitea 评论：\n"
            f"- 查看 Issue/PR 详情（上方 API）\n"
            f"- 如有意见，评论回复: POST {gitea_api}/repos/{repo}/issues/{issue_number}/comments"
        )
    elif intent == "collaborate":
        return (
            f"这是一条协作请求，请评估后回复（评论或 Mail）：\n"
            f"1. 获取详情（上方 API）\n"
            f"2. 评估可行性\n"
            f"3a. 评论回复: POST {gitea_api}/repos/{repo}/issues/{issue_number}/comments\n"
            f'    Body: {{"body": "你的回复"}}\n'
            f"3b. 或通过 Mail 回复评论者: {commenter}"
        )
    elif intent == "assign":
        return (
            f"这是一条任务分配，请认领并执行：\n"
            f"1. 获取 Issue 详情（上方 API）\n"
            f"2. 评估可行性\n"
            f"3. 认领 Issue: POST {gitea_api}/repos/{repo}/issues/{issue_number}/assignees\n"
            f'   Body: {{"assignees": ["{{your_agent_id}}"]}}\n'
            f"4. 执行任务\n"
            f"5. 完成后更新 Issue 状态: PATCH {gitea_api}/repos/{repo}/issues/{issue_number}\n"
            f'   Body: {{"state": "closed"}}'
        )
    return "请查看详情（上方 API）并按需回复。"