package handler

import (
	"net/http"

	"x-agents/server/internal/service"

	"github.com/gin-gonic/gin"
)

// AgentHandler Agent 处理器
type AgentHandler struct {
	agentService *service.AgentService
}

// NewAgentHandler 创建 Agent 处理器
func NewAgentHandler(agentService *service.AgentService) *AgentHandler {
	return &AgentHandler{
		agentService: agentService,
	}
}

// ChatRequest 对话请求
type ChatRequest struct {
	AgentID   int    `json:"agent_id" binding:"required"`
	Message   string `json:"message" binding:"required"`
	SessionID string `json:"session_id"`
	ModelID   string `json:"model_id"`
	UseXBot   bool   `json:"use_xbot"`
}

// ChatResponse 对话响应
type ChatResponse struct {
	AgentID    int         `json:"agent_id"`
	Reply      string      `json:"reply"`
	ToolsUsed  []string    `json:"tools_used"`
	SessionID  string      `json:"session_id"`
	TokensUsed int         `json:"tokens_used"`
	DurationMs int         `json:"duration_ms"`
	Metadata   interface{} `json:"metadata"`
}


// CreateAgentResponse 创建智能体响应
type CreateAgentResponse struct {
	AgentID int    `json:"agent_id"`
	Name    string `json:"name"`
	Message string `json:"message"`
}

// ListAgentsResponse 获取智能体列表响应
type ListAgentsResponse struct {
	Agents []interface{} `json:"agents"`
}

// Chat 单智能体对话
// @Summary 单智能体对话
// @Tags 智能体管理
// @Accept json
// @Produce json
// @Param request body ChatRequest true "对话请求"
// @Success 200 {object} ChatResponse
// @Router /api/agent/chat [post]
func (h *AgentHandler) Chat(c *gin.Context) {
	var req ChatRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	// 获取用户 ID（从认证中间件获取）
	userID := 1 // TODO: 从 c.Get("user_id") 获取

	pythonReq := service.AgentChatRequest{
		AgentID:   req.AgentID,
		Message:   req.Message,
		UserID:    userID,
		SessionID: req.SessionID,
		ModelID:   req.ModelID,
		UseXBot:   req.UseXBot,
	}

	result, err := h.agentService.Chat(pythonReq)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	// 转换工具调用
	toolsUsed := make([]string, 0)
	for _, tool := range result.ToolCalls {
		if toolMap, ok := tool.(map[string]interface{}); ok {
			if skillID, ok := toolMap["skill_id"].(string); ok {
				toolsUsed = append(toolsUsed, skillID)
			}
		}
	}

	c.JSON(http.StatusOK, ChatResponse{
		AgentID:    result.AgentID,
		Reply:      result.Response,
		ToolsUsed:  toolsUsed,
		SessionID:  result.SessionID,
		TokensUsed: result.TokensUsed,
		DurationMs: result.DurationMs,
		Metadata:   nil,
	})
}

// ChatStream 单智能体对话（流式输出）
// @Summary 单智能体对话（流式输出）
// @Tags 智能体管理
// @Accept json
// @Produce text/event-stream
// @Param request body ChatRequest true "对话请求"
// @Router /api/agent/chat/stream [post]
func (h *AgentHandler) ChatStream(c *gin.Context) {
	var req ChatRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	// 获取用户 ID
	userID := 1 // TODO: 从 c.Get("user_id") 获取

	// 构建 SSE 流
	c.Header("Content-Type", "text/event-stream")
	c.Header("Cache-Control", "no-cache")
	c.Header("Connection", "keep-alive")
	c.Header("Access-Control-Allow-Origin", "*")

	// 调用 Python 服务的流式端点
	err := h.agentService.ChatStream(c, req.AgentID, req.Message, req.SessionID, req.ModelID, userID)
	if err != nil && !c.IsAborted() {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
	}
}

// TeamChatRequest 多智能体群聊请求
type TeamChatRequest struct {
	SupervisorAgentID int      `json:"supervisor_agent_id" binding:"required"`
	MemberAgentIDs   []int    `json:"member_agent_ids" binding:"required"`
	Message         string   `json:"message" binding:"required"`
	SessionID       string   `json:"session_id"`
	Strategy        string   `json:"strategy"`
}

// TeamChatResponse 多智能体群聊响应
type TeamChatResponse struct {
	SupervisorAgentID int         `json:"supervisor_agent_id"`
	Reply             string      `json:"reply"`
	SubtaskResults    interface{} `json:"subtask_results"`
	Strategy          string      `json:"strategy"`
	SessionID         string      `json:"session_id"`
	DurationMs        int         `json:"duration_ms"`
	Metadata          interface{} `json:"metadata"`
}

// TeamChat 多智能体群聊
// @Summary 多智能体群聊
// @Tags 智能体管理
// @Accept json
// @Produce json
// @Param request body TeamChatRequest true "群聊请求"
// @Success 200 {object} TeamChatResponse
// @Router /api/agent/team/chat [post]
func (h *AgentHandler) TeamChat(c *gin.Context) {
	var req TeamChatRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	// 获取用户 ID
	userID := 1 // TODO: 从 c.Get("user_id") 获取

	pythonReq := service.TeamChatRequest{
		SupervisorAgentID: req.SupervisorAgentID,
		MemberAgentIDs:    req.MemberAgentIDs,
		Message:          req.Message,
		UserID:            userID,
		SessionID:         req.SessionID,
		Strategy:          req.Strategy,
	}

	result, err := h.agentService.TeamChat(pythonReq)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, TeamChatResponse{
		SupervisorAgentID: result.SupervisorAgentID,
		Reply:             result.Response,
		SubtaskResults:    result.SubtaskResults,
		Strategy:          result.Strategy,
		SessionID:         result.SessionID,
		DurationMs:        result.DurationMs,
		Metadata:          nil,
	})
}

// CreateAgent 创建智能体
// @Summary 创建智能体
// @Tags 智能体管理
// @Accept json
// @Produce json
// @Param request body CreateAgentRequest true "创建智能体请求"
// @Success 200 {object} CreateAgentResponse
// @Router /api/agent/create [post]
func (h *AgentHandler) CreateAgent(c *gin.Context) {
	var req service.CreateAgentRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	// 获取用户 ID
	userID := 1 // TODO: 从 c.Get("user_id") 获取

	result, err := h.agentService.CreateAgent(req, userID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, result)
}

// ListAgents 获取智能体列表
// @Summary 获取智能体列表
// @Tags 智能体管理
// @Produce json
// @Success 200 {object} ListAgentsResponse
// @Router /api/agent/list [get]
func (h *AgentHandler) ListAgents(c *gin.Context) {
	result, err := h.agentService.ListAgents()
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, result)
}