package handler

import (
	"net/http"
	"strconv"

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

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

// MemoryHandler 记忆处理器
type MemoryHandler struct {
	memoryService *service.MemoryService
}

// NewMemoryHandler 创建记忆处理器
func NewMemoryHandler(memoryService *service.MemoryService) *MemoryHandler {
	return &MemoryHandler{
		memoryService: memoryService,
	}
}

// CreateMemoryRequest 创建记忆请求
type CreateMemoryRequest struct {
	AgentID    string `json:"agent_id" binding:"required"`
	UserID     string `json:"user_id"`
	Content    string `json:"content" binding:"required"`
	MemoryType string `json:"memory_type"`
	Category   string `json:"category"`
	Tags       string `json:"tags"`
	Keywords   string `json:"keywords"`
	Importance int    `json:"importance"`
	IsPinned   bool   `json:"is_pinned"`
}

// SearchMemoryRequest 搜索记忆请求
type SearchMemoryRequest struct {
	AgentID    string `json:"agent_id" binding:"required"`
	UserID     string `json:"user_id"`
	Keyword    string `json:"keyword"`
	Tags       string `json:"tags"`
	Category   string `json:"category"`
	MemoryType string `json:"memory_type"`
	MinScore   int    `json:"min_score"`
	Limit      int    `json:"limit"`
	Offset     int    `json:"offset"`
}

// UpdateMemoryRequest 更新记忆请求
type UpdateMemoryRequest struct {
	Content    string `json:"content"`
	MemoryType string `json:"memory_type"`
	Category   string `json:"category"`
	Tags       string `json:"tags"`
	Keywords   string `json:"keywords"`
	Importance int    `json:"importance"`
	IsPinned   *bool  `json:"is_pinned"`
}

// CreateMemory 创建记忆
func (h *MemoryHandler) CreateMemory(c *gin.Context) {
	var req CreateMemoryRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	// 设置默认值
	memoryType := req.MemoryType
	if memoryType == "" {
		memoryType = "conversation"
	}
	importance := req.Importance
	if importance == 0 {
		importance = 5
	}

	memory, err := h.memoryService.CreateMemory(req.AgentID, req.UserID, req.Content, memoryType, req.Category, req.Tags, req.Keywords, importance, req.IsPinned)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, memory)
}

// GetMemories 获取记忆列表
func (h *MemoryHandler) GetMemories(c *gin.Context) {
	agentID := c.Param("id")
	userID := c.Query("user_id")
	category := c.Query("category")
	memoryType := c.Query("memory_type")
	limitStr := c.DefaultQuery("limit", "10")
	offsetStr := c.DefaultQuery("offset", "0")

	limit, err := strconv.Atoi(limitStr)
	if err != nil {
		limit = 10
	}
	offset, err := strconv.Atoi(offsetStr)
	if err != nil {
		offset = 0
	}

	memories, total, err := h.memoryService.GetMemories(agentID, userID, category, memoryType, limit, offset)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{"list": memories, "total": total})
}

// SearchMemories 搜索记忆
func (h *MemoryHandler) SearchMemories(c *gin.Context) {
	var req SearchMemoryRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	// 设置默认值
	limit := req.Limit
	if limit == 0 {
		limit = 10
	}
	offset := req.Offset
	if offset < 0 {
		offset = 0
	}

	memories, total, err := h.memoryService.SearchMemories(req.AgentID, req.UserID, req.Keyword, req.Tags, req.Category, req.MemoryType, req.MinScore, limit, offset)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{"list": memories, "total": total})
}

// GetMemory 获取单个记忆详情
func (h *MemoryHandler) GetMemory(c *gin.Context) {
	memoryID := c.Param("memory_id")

	memory, err := h.memoryService.GetMemoryByID(memoryID)
	if err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "Memory not found"})
		return
	}

	c.JSON(http.StatusOK, memory)
}

// UpdateMemory 更新记忆
func (h *MemoryHandler) UpdateMemory(c *gin.Context) {
	memoryID := c.Param("memory_id")

	var req UpdateMemoryRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	memory, err := h.memoryService.UpdateMemory(memoryID, req.Content, req.MemoryType, req.Category, req.Tags, req.Keywords, req.Importance, req.IsPinned)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, memory)
}

// DeleteMemory 删除记忆
func (h *MemoryHandler) DeleteMemory(c *gin.Context) {
	memoryID := c.Param("memory_id")

	err := h.memoryService.DeleteMemory(memoryID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "Memory deleted successfully"})
}

// ExportMemories 导出记忆
func (h *MemoryHandler) ExportMemories(c *gin.Context) {
	agentID := c.Param("id")
	userID := c.Query("user_id")
	format := c.DefaultQuery("format", "json")

	exportData, err := h.memoryService.ExportMemories(agentID, userID, format)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"format": format,
		"data":   exportData,
	})
}

// ImportMemories 导入记忆
type ImportMemoryRequest struct {
	AgentID   string              `json:"agent_id" binding:"required"`
	UserID    string              `json:"user_id"`
	Memories  []model.ImportItem  `json:"memories" binding:"required"`
}

func (h *MemoryHandler) ImportMemories(c *gin.Context) {
	var req ImportMemoryRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	count, err := h.memoryService.ImportMemories(req.AgentID, req.UserID, req.Memories)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

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

// GetMemoryCategories 获取记忆分类列表
func (h *MemoryHandler) GetMemoryCategories(c *gin.Context) {
	agentID := c.Param("id")
	userID := c.Query("user_id")

	categories, err := h.memoryService.GetMemoryCategories(agentID, userID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

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

// GetMemoryTags 获取记忆标签列表
func (h *MemoryHandler) GetMemoryTags(c *gin.Context) {
	agentID := c.Param("id")
	userID := c.Query("user_id")

	tags, err := h.memoryService.GetMemoryTags(agentID, userID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

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