package handlers

import (
	"log"
	"net/http"
	"strconv"

	"github.com/gin-gonic/gin"

	"kenaito-notebook-server/services"
)

type NoteHandler struct {
	db *services.Database
}

func NewNoteHandler(db *services.Database) *NoteHandler {
	return &NoteHandler{db: db}
}

func (h *NoteHandler) GetNoteTree(c *gin.Context) {
	userID := c.GetInt64("userID")
	result, err := h.db.GetNoteTree(userID)
	if err != nil {
		log.Printf("[API] GetNoteTree error: %v", err)
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, result)
}

func (h *NoteHandler) GetNote(c *gin.Context) {
	id, err := strconv.ParseInt(c.Param("id"), 10, 64)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid id"})
		return
	}

	note, err := h.db.GetNote(id)
	if err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, note)
}

func (h *NoteHandler) CreateNote(c *gin.Context) {
	userID := c.GetInt64("userID")

	var req struct {
		ParentID int64  `json:"parentId"`
		Title    string `json:"title"`
		IsFolder bool   `json:"isFolder"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	note, err := h.db.CreateNote(userID, req.ParentID, req.Title, req.IsFolder)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusCreated, note)
}

func (h *NoteHandler) UpdateNote(c *gin.Context) {
	id, err := strconv.ParseInt(c.Param("id"), 10, 64)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid id"})
		return
	}

	var req struct {
		Title   string `json:"title"`
		Content string `json:"content"`
		Tag     string `json:"tag"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	if err := h.db.UpdateNote(id, req.Title, req.Content, req.Tag); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"message": "updated"})
}

func (h *NoteHandler) DeleteNote(c *gin.Context) {
	id, err := strconv.ParseInt(c.Param("id"), 10, 64)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid id"})
		return
	}

	if err := h.db.DeleteNote(id); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"message": "deleted"})
}

func (h *NoteHandler) SearchNotes(c *gin.Context) {
	userID := c.GetInt64("userID")

	keyword := c.Query("q")
	if keyword == "" {
		c.JSON(http.StatusBadRequest, gin.H{"error": "keyword is required"})
		return
	}

	notes, err := h.db.SearchNotes(userID, keyword)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, notes)
}

func (h *NoteHandler) GetTrashNotes(c *gin.Context) {
	userID := c.GetInt64("userID")

	notes, err := h.db.GetTrashNotes(userID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, notes)
}

func (h *NoteHandler) RestoreNote(c *gin.Context) {
	id, err := strconv.ParseInt(c.Param("id"), 10, 64)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid id"})
		return
	}

	if err := h.db.RestoreNote(id); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"message": "restored"})
}

func (h *NoteHandler) PermanentDeleteNote(c *gin.Context) {
	id, err := strconv.ParseInt(c.Param("id"), 10, 64)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid id"})
		return
	}

	if err := h.db.PermanentDeleteNote(id); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"message": "permanently deleted"})
}

func (h *NoteHandler) EmptyTrash(c *gin.Context) {
	userID := c.GetInt64("userID")

	if err := h.db.EmptyTrash(userID); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"message": "trash emptied"})
}