package v1

import (
	"net/http"

	"github.com/gin-gonic/gin"

	"github.com/gochat/gochat/internal/service"
	"github.com/gochat/gochat/pkg/response"
)

// CustomAttributeValueHandler handles setting/removing custom attribute values
// on conversations and contacts.
// Reference: Chatwoot app/controllers/api/v1/accounts/custom_attribute_definitions_controller.rb
type CustomAttributeValueHandler struct {
	svc *service.CustomAttributeValueService
}

// NewCustomAttributeValueHandler creates a new handler with service injection.
func NewCustomAttributeValueHandler(svc *service.CustomAttributeValueService) *CustomAttributeValueHandler {
	return &CustomAttributeValueHandler{svc: svc}
}

// SetConversationAttribute sets a custom attribute value on a conversation.
// POST /api/v1/accounts/:account_id/conversations/:conversation_id/custom_attributes
func (h *CustomAttributeValueHandler) SetConversationAttribute(c *gin.Context) {
	accountID, err := parseUintParam(c, "account_id")
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid account_id")
		return
	}

	conversationID, err := parseUintParam(c, "conversation_id")
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid conversation_id")
		return
	}

	var req service.SetAttributeValueRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, err.Error())
		return
	}

	conversation, svcErr := h.svc.SetConversationAttributeValue(c.Request.Context(), accountID, conversationID, &req)
	if svcErr != nil {
		handleServiceError(c, svcErr)
		return
	}

	response.OK(c, conversation)
}

// RemoveConversationAttribute removes a custom attribute from a conversation.
// DELETE /api/v1/accounts/:account_id/conversations/:conversation_id/custom_attributes/:attribute_name
func (h *CustomAttributeValueHandler) RemoveConversationAttribute(c *gin.Context) {
	accountID, err := parseUintParam(c, "account_id")
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid account_id")
		return
	}

	conversationID, err := parseUintParam(c, "conversation_id")
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid conversation_id")
		return
	}

	attributeName := c.Param("attribute_name")
	if attributeName == "" {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "attribute_name is required")
		return
	}

	conversation, svcErr := h.svc.RemoveConversationAttributeValue(c.Request.Context(), accountID, conversationID, attributeName)
	if svcErr != nil {
		handleServiceError(c, svcErr)
		return
	}

	response.OK(c, conversation)
}

// SetContactAttribute sets a custom attribute value on a contact.
// POST /api/v1/accounts/:account_id/contacts/:contact_id/custom_attributes
func (h *CustomAttributeValueHandler) SetContactAttribute(c *gin.Context) {
	accountID, err := parseUintParam(c, "account_id")
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid account_id")
		return
	}

	contactID, err := parseUintParam(c, "contact_id")
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid contact_id")
		return
	}

	var req service.SetAttributeValueRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, err.Error())
		return
	}

	contact, svcErr := h.svc.SetContactAttributeValue(c.Request.Context(), accountID, contactID, &req)
	if svcErr != nil {
		handleServiceError(c, svcErr)
		return
	}

	response.OK(c, contact)
}

// RemoveContactAttribute removes a custom attribute from a contact.
// DELETE /api/v1/accounts/:account_id/contacts/:contact_id/custom_attributes/:attribute_name
func (h *CustomAttributeValueHandler) RemoveContactAttribute(c *gin.Context) {
	accountID, err := parseUintParam(c, "account_id")
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid account_id")
		return
	}

	contactID, err := parseUintParam(c, "contact_id")
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid contact_id")
		return
	}

	attributeName := c.Param("attribute_name")
	if attributeName == "" {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "attribute_name is required")
		return
	}

	contact, svcErr := h.svc.RemoveContactAttributeValue(c.Request.Context(), accountID, contactID, attributeName)
	if svcErr != nil {
		handleServiceError(c, svcErr)
		return
	}

	response.OK(c, contact)
}