package handler

import (
	"context"
	"net/http"
	"time"

	"dbview/service/internal/common/response"
	"dbview/service/internal/modules/mcp_ai/api"
	"dbview/service/internal/modules/mcp_ai/service"

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

// Handler 提供 AI 聊天接口的 HTTP 处理器。
type Handler struct {
	svc *service.AIService
}

// NewHandler 创建 Handler。
func NewHandler(svc *service.AIService) *Handler {
	return &Handler{svc: svc}
}

// Chat 提供 POST /ai/chat 接口。
func (h *Handler) Chat(c *gin.Context) {
	var req api.ChatRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, response.Response{Code: 1, Msg: "参数错误", Error: err.Error()})
		return
	}

	ctx, cancel := context.WithTimeout(c.Request.Context(), 45*time.Second)
	defer cancel()

	text, err := h.svc.Chat(ctx, req.Prompt, req.System, req.Model)
	if err != nil {
		c.JSON(http.StatusInternalServerError, response.Response{Code: 2, Msg: "AI 调用失败", Error: err.Error()})
		return
	}

	c.JSON(http.StatusOK, response.Response{Code: 0, Msg: "ok", Data: api.ChatResponse{Text: text}})
}