package handler

import (
	"net/http"

	"x-agents/server/internal/model"
	"x-agents/server/internal/service"

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

type ChatHandler struct {
	chatService *service.ChatService
}

func NewChatHandler(chatService *service.ChatService) *ChatHandler {
	return &ChatHandler{chatService: chatService}
}

// Chat 处理聊天请求
func (h *ChatHandler) Chat(c *gin.Context) {
	var req model.AgentRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	// 从上下文获取用户ID（由中间件设置）
	userID, exists := c.Get("user_id")
	if !exists {
		c.JSON(http.StatusUnauthorized, gin.H{"error": "unauthorized"})
		return
	}

	resp, err := h.chatService.Chat(c.Request.Context(), userID.(string), req)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, resp)
}

// ListAgents 获取 Agent 列表
func (h *ChatHandler) ListAgents(c *gin.Context) {
	userID, exists := c.Get("user_id")
	if !exists {
		c.JSON(http.StatusUnauthorized, gin.H{"error": "unauthorized"})
		return
	}

	agents, err := h.chatService.ListAgents(userID.(string))
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	if agents == nil {
		agents = []model.Agent{}
	}

	c.JSON(http.StatusOK, gin.H{"agents": agents})
}

// CreateAgent 创建 Agent
func (h *ChatHandler) CreateAgent(c *gin.Context) {
	userID, exists := c.Get("user_id")
	if !exists {
		c.JSON(http.StatusUnauthorized, gin.H{"error": "unauthorized"})
		return
	}

	var req struct {
		Name        string `json:"name" binding:"required"`
		Description string `json:"description"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	agent, err := h.chatService.CreateAgent(userID.(string), req.Name, req.Description)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusCreated, agent)
}