package handler

import (
	"net/http"

	"github.com/gin-gonic/gin"
	"github.com/muyuqingfeng/iloom/shared/pkg/response"
	ws "github.com/muyuqingfeng/iloom/shared/pkg/websocket"
	"github.com/muyuqingfeng/iloom/textile-service/internal/service"
)

type YarnHandler struct {
	svc   *service.YarnService
	wsHub *ws.Hub
}

type CreateYarnStockRequest struct {
	Name     string  `json:"name" binding:"required"`
	Spec     string  `json:"spec"`
	Quantity float64 `json:"quantity"`
	Unit     string  `json:"unit"`
	MinStock float64 `json:"min_stock"`
}

type UpdateYarnStockRequest struct {
	Name     string  `json:"name"`
	Spec     string  `json:"spec"`
	Unit     string  `json:"unit"`
	MinStock float64 `json:"min_stock"`
}

type YarnRecordRequest struct {
	RecordType string  `json:"record_type" binding:"required,oneof=in out"`
	Quantity   float64 `json:"quantity" binding:"required,gt=0"`
	Unit       string  `json:"unit"`
	BatchNo    string  `json:"batch_no"`
	PlanID     string  `json:"plan_id"`
	Notes      string  `json:"notes"`
}

func NewYarnHandler(svc *service.YarnService, wsHub *ws.Hub) *YarnHandler {
	return &YarnHandler{svc: svc, wsHub: wsHub}
}

func (h *YarnHandler) List(c *gin.Context) {
	companyID := c.GetHeader("X-Company-ID")
	if companyID == "" {
		response.BadRequest(c, "missing X-Company-ID header")
		return
	}

	stocks, err := h.svc.List(c.Request.Context(), companyID)
	if err != nil {
		response.InternalError(c, err.Error())
		return
	}

	response.OK(c, stocks)
}

func (h *YarnHandler) Create(c *gin.Context) {
	companyID := c.GetHeader("X-Company-ID")
	if companyID == "" {
		response.BadRequest(c, "missing X-Company-ID header")
		return
	}

	var req CreateYarnStockRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.BadRequest(c, err.Error())
		return
	}

	stock, err := h.svc.Create(c.Request.Context(), companyID, service.CreateYarnStockRequest{
		Name:     req.Name,
		Spec:     req.Spec,
		Quantity: req.Quantity,
		Unit:     req.Unit,
		MinStock: req.MinStock,
	})
	if err != nil {
		response.InternalError(c, err.Error())
		return
	}

	h.wsHub.BroadcastToCompany(companyID, &ws.Event{
		Table:  "yarn_stock",
		Action: "INSERT",
	})

	c.JSON(http.StatusCreated, response.Response{
		Code:    0,
		Message: "success",
		Data:    stock,
	})
}

func (h *YarnHandler) Update(c *gin.Context) {
	companyID := c.GetHeader("X-Company-ID")
	if companyID == "" {
		response.BadRequest(c, "missing X-Company-ID header")
		return
	}

	id := c.Param("id")

	var req UpdateYarnStockRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.BadRequest(c, err.Error())
		return
	}

	if err := h.svc.Update(c.Request.Context(), id, companyID, service.UpdateYarnStockRequest{
		Name:     req.Name,
		Spec:     req.Spec,
		Unit:     req.Unit,
		MinStock: req.MinStock,
	}); err != nil {
		response.InternalError(c, err.Error())
		return
	}

	h.wsHub.BroadcastToCompany(companyID, &ws.Event{
		Table:  "yarn_stock",
		Action: "UPDATE",
	})

	response.OK(c, gin.H{"message": "updated"})
}

func (h *YarnHandler) AddRecord(c *gin.Context) {
	companyID := c.GetHeader("X-Company-ID")
	userID := c.GetHeader("X-User-ID")
	if companyID == "" || userID == "" {
		response.BadRequest(c, "missing required headers")
		return
	}

	yarnStockID := c.Param("id")

	var req YarnRecordRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.BadRequest(c, err.Error())
		return
	}

	if err := h.svc.AddRecord(c.Request.Context(), yarnStockID, companyID, userID, service.YarnRecordRequest{
		RecordType: req.RecordType,
		Quantity:   req.Quantity,
		Unit:       req.Unit,
		BatchNo:    req.BatchNo,
		PlanID:     req.PlanID,
		Notes:      req.Notes,
	}); err != nil {
		response.InternalError(c, err.Error())
		return
	}

	h.wsHub.BroadcastToCompany(companyID, &ws.Event{
		Table:  "yarn_stock_records",
		Action: "INSERT",
	})

	response.OK(c, gin.H{"message": "record added"})
}