package handlers

import (
	"net/http"

	"ezops/internal/api/middleware"
	"ezops/internal/models"

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

// GetChatHistory 获取当前用户的对话历史（按时间正序，仅返回最近 100 条避免过大） // Logan.Li
// GET /api/v1/aiops/chat-history
func (h *LLMHandler) GetChatHistory(c *gin.Context) {
	uid := middleware.GetUserID(c)
	var rows []models.ChatHistory
	// 子查询取最近 100 条后再正序返回，保证前端渲染顺序正确 // Logan.Li
	h.db.Where("user_id = ?", uid).
		Order("id DESC").
		Limit(100).
		Find(&rows)
	// 反转为时间正序（最早在前）
	for i, j := 0, len(rows)-1; i < j; i, j = i+1, j-1 {
		rows[i], rows[j] = rows[j], rows[i]
	}
	c.JSON(http.StatusOK, models.Response{Code: 200, Data: gin.H{
		"list":  rows,
		"total": len(rows),
	}})
}

// ClearChatHistory 清空当前用户的对话历史 // Logan.Li
// DELETE /api/v1/aiops/chat-history
func (h *LLMHandler) ClearChatHistory(c *gin.Context) {
	uid := middleware.GetUserID(c)
	if err := h.db.Where("user_id = ?", uid).Delete(&models.ChatHistory{}).Error; err != nil {
		c.JSON(http.StatusInternalServerError, models.Response{Code: 500, Message: "清除失败: " + err.Error()})
		return
	}
	c.JSON(http.StatusOK, models.Response{Code: 200, Message: "对话历史已清空"})
}