"""
角色分配器 - AI 驱动的角色分配
分析任务描述，自动为 Agent 分配最适合的角色
"""

import asyncio
from typing import Dict, List, Optional
from dataclasses import dataclass
from enum import Enum

from .agent_registry import AgentRegistry, AgentInfo


class AgentRole(str, Enum):
    """Agent 角色枚举"""
    ARCHITECT = "architect"
    PRODUCT_MANAGER = "pm"
    DEVELOPER = "developer"
    QA = "qa"
    REVIEWER = "reviewer"


@dataclass
class RoleWeight:
    """角色权重配置"""
    role: str
    weight: float
    keywords: List[str]

    def matches(self, text: str) -> int:
        """计算匹配分数"""
        score = 0
        text_lower = text.lower()
        for keyword in self.keywords:
            if keyword.lower() in text_lower:
                score += 1
        return score


class RoleAllocator:
    """
    角色分配器

    分析任务描述，为 Agent 分配最适合的角色
    """

    # 角色权重配置（来自 design-spec.md）
    ROLE_WEIGHTS = {
        "pm": RoleWeight("pm", 1.5, ["需求", "产品", "规划", "用户", "功能", "priority", "requirement", "product"]),
        "architect": RoleWeight("architect", 1.5, ["架构", "设计", "方案", "技术", "系统", "design", "architecture"]),
        "developer": RoleWeight("developer", 1.0, ["开发", "实现", "编码", "代码", "function", "implement", "code"]),
        "reviewer": RoleWeight("reviewer", 1.3, ["审查", "review", "检查", "验证", "校对", "check"]),
        "qa": RoleWeight("qa", 1.2, ["测试", "test", "质量", "bug", "验证", "quality"]),
    }

    def __init__(self):
        pass

    def _analyze_task_roles(self, task: str) -> Dict[str, float]:
        """
        分析任务需要的角色及其权重

        Args:
            task: 任务描述

        Returns:
            角色权重字典
        """
        scores = {}
        for role_name, role_weight in self.ROLE_WEIGHTS.items():
            match_score = role_weight.matches(task)
            if match_score > 0:
                scores[role_name] = match_score * role_weight.weight
            else:
                # 即使没有匹配关键词，也给予基础权重
                scores[role_name] = 0.1 * role_weight.weight

        return scores

    async def allocate_roles(
        self,
        task: str,
        available_agents: List[str]
    ) -> Dict[str, str]:
        """
        为任务分配角色

        Args:
            task: 任务描述
            available_agents: 可用的 Agent ID 列表

        Returns:
            Agent ID -> 角色映射
        """
        # 获取所有 Agent 信息
        # 注意：在实际实现中，这会从 AgentRegistry 获取
        # 这里简化处理，假设已有 Agent 信息

        # 分析任务需要的角色
        role_scores = self._analyze_task_roles(task)

        # 按分数排序角色
        sorted_roles = sorted(role_scores.items(), key=lambda x: -x[1])

        # 简单分配：将可用 Agent 按顺序分配给角色
        allocation = {}
        for i, agent_id in enumerate(available_agents):
            if i < len(sorted_roles):
                allocation[agent_id] = sorted_roles[i][0]
            else:
                allocation[agent_id] = "developer"  # 默认角色

        return allocation

    def get_primary_role(self, task: str) -> str:
        """
        获取任务的主要角色

        Args:
            task: 任务描述

        Returns:
            主要角色名称
        """
        role_scores = self._analyze_task_roles(task)
        if not role_scores:
            return "developer"

        return max(role_scores.items(), key=lambda x: x[1])[0]

    async def suggest_agents_for_task(
        self,
        task: str,
        all_agents: List[AgentInfo],
        count: int = 3
    ) -> List[AgentInfo]:
        """
        为任务推荐合适的 Agent

        Args:
            task: 任务描述
            all_agents: 所有可用 Agent 列表
            count: 推荐数量

        Returns:
            推荐的 Agent 列表
        """
        primary_role = self.get_primary_role(task)

        # 按角色匹配度排序
        scored_agents = []
        for agent in all_agents:
            if agent.role == primary_role:
                scored_agents.append((agent, 10))  # 完全匹配高分
            elif agent.role in ["architect", "developer", "reviewer"]:
                scored_agents.append((agent, 5))  # 相关角色中分
            else:
                scored_agents.append((agent, 1))  # 其他角色低分

        # 按分数排序
        scored_agents.sort(key=lambda x: -x[1])

        return [agent for agent, _ in scored_agents[:count]]

    def explain_allocation(self, task: str, allocation: Dict[str, str]) -> str:
        """
        解释角色分配的原因

        Args:
            task: 任务描述
            allocation: 分配结果

        Returns:
            解释文本
        """
        role_scores = self._analyze_task_roles(task)
        primary = self.get_primary_role(task)

        lines = [f"任务分析: {task}", f"主要角色: {primary}"]
        lines.append("角色权重:")
        for role, score in sorted(role_scores.items(), key=lambda x: -x[1]):
            lines.append(f"  - {role}: {score:.2f}")
        lines.append("分配结果:")
        for agent_id, role in allocation.items():
            lines.append(f"  - {agent_id}: {role}")

        return "\n".join(lines)


# 全局单例
_allocator_instance: Optional[RoleAllocator] = None


def get_role_allocator() -> RoleAllocator:
    """获取角色分配器单例"""
    global _allocator_instance
    if _allocator_instance is None:
        _allocator_instance = RoleAllocator()
    return _allocator_instance