package handler

import (
	"apskel-pos-be/internal/appcontext"
	"apskel-pos-be/internal/constants"
	"apskel-pos-be/internal/contract"
	"apskel-pos-be/internal/logger"
	"apskel-pos-be/internal/util"
	"apskel-pos-be/internal/validator"
	"strconv"

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

type TableHandler struct {
	tableService   TableService
	tableValidator *validator.TableValidator
}

func NewTableHandler(tableService TableService, tableValidator *validator.TableValidator) *TableHandler {
	return &TableHandler{
		tableService:   tableService,
		tableValidator: tableValidator,
	}
}

func (h *TableHandler) Create(c *gin.Context) {
	ctx := c.Request.Context()
	contextInfo := appcontext.FromGinContext(ctx)

	var req contract.CreateTableRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		logger.FromContext(ctx).WithError(err).Error("TableHandler::Create -> request binding failed")
		validationResponseError := contract.NewResponseError(constants.MissingFieldErrorCode, constants.RequestEntity, err.Error())
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "TableHandler::Create")
		return
	}

	if err := h.tableValidator.ValidateCreateTableRequest(req); err != nil {
		logger.FromContext(ctx).WithError(err).Error("TableHandler::Create -> validation failed")
		validationResponseError := contract.NewResponseError(constants.ValidationErrorCode, constants.RequestEntity, err.Error())
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "TableHandler::Create")
		return
	}

	response := h.tableService.CreateTable(ctx, contextInfo, &req)
	if response.HasErrors() {
		errorResp := response.GetErrors()[0]
		logger.FromContext(ctx).WithError(errorResp).Error("TableHandler::Create -> service failed")
	}

	util.HandleResponse(c.Writer, c.Request, response, "TableHandler::Create")
}

func (h *TableHandler) GetByID(c *gin.Context) {
	ctx := c.Request.Context()

	id := c.Param("id")
	tableID, err := uuid.Parse(id)
	if err != nil {
		logger.FromContext(ctx).WithError(err).Error("TableHandler::GetByID -> Invalid table ID")
		validationResponseError := contract.NewResponseError(constants.MalformedFieldErrorCode, constants.RequestEntity, "Invalid table ID")
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "TableHandler::GetByID")
		return
	}

	response := h.tableService.GetTableByID(ctx, tableID)
	if response.HasErrors() {
		errorResp := response.GetErrors()[0]
		logger.FromContext(ctx).WithError(errorResp).Error("TableHandler::GetByID -> service failed")
	}

	util.HandleResponse(c.Writer, c.Request, response, "TableHandler::GetByID")
}

func (h *TableHandler) Update(c *gin.Context) {
	ctx := c.Request.Context()

	id := c.Param("id")
	tableID, err := uuid.Parse(id)
	if err != nil {
		logger.FromContext(ctx).WithError(err).Error("TableHandler::Update -> Invalid table ID")
		validationResponseError := contract.NewResponseError(constants.MalformedFieldErrorCode, constants.RequestEntity, "Invalid table ID")
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "TableHandler::Update")
		return
	}

	var req contract.UpdateTableRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		logger.FromContext(ctx).WithError(err).Error("TableHandler::Update -> request binding failed")
		validationResponseError := contract.NewResponseError(constants.MissingFieldErrorCode, constants.RequestEntity, err.Error())
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "TableHandler::Update")
		return
	}

	if err := h.tableValidator.ValidateUpdateTableRequest(req); err != nil {
		logger.FromContext(ctx).WithError(err).Error("TableHandler::Update -> validation failed")
		validationResponseError := contract.NewResponseError(constants.ValidationErrorCode, constants.RequestEntity, err.Error())
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "TableHandler::Update")
		return
	}

	response := h.tableService.UpdateTable(ctx, tableID, &req)
	if response.HasErrors() {
		errorResp := response.GetErrors()[0]
		logger.FromContext(ctx).WithError(errorResp).Error("TableHandler::Update -> service failed")
	}

	util.HandleResponse(c.Writer, c.Request, response, "TableHandler::Update")
}

func (h *TableHandler) Delete(c *gin.Context) {
	ctx := c.Request.Context()

	id := c.Param("id")
	tableID, err := uuid.Parse(id)
	if err != nil {
		logger.FromContext(ctx).WithError(err).Error("TableHandler::Delete -> Invalid table ID")
		validationResponseError := contract.NewResponseError(constants.MalformedFieldErrorCode, constants.RequestEntity, "Invalid table ID")
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "TableHandler::Delete")
		return
	}

	response := h.tableService.DeleteTable(ctx, tableID)
	if response.HasErrors() {
		errorResp := response.GetErrors()[0]
		logger.FromContext(ctx).WithError(errorResp).Error("TableHandler::Delete -> service failed")
	}

	util.HandleResponse(c.Writer, c.Request, response, "TableHandler::Delete")
}

func (h *TableHandler) List(c *gin.Context) {
	ctx := c.Request.Context()
	contextInfo := appcontext.FromGinContext(ctx)

	query := contract.ListTablesQuery{
		OrganizationID: contextInfo.OrganizationID.String(),
		OutletID:       c.Query("outlet_id"),
		Status:         c.Query("status"),
		IsActive:       c.Query("is_active"),
		Search:         c.Query("search"),
		Page:           1,
		Limit:          100,
	}

	if pageStr := c.Query("page"); pageStr != "" {
		if page, err := strconv.Atoi(pageStr); err == nil && page > 0 {
			query.Page = page
		}
	}

	if limitStr := c.Query("limit"); limitStr != "" {
		if limit, err := strconv.Atoi(limitStr); err == nil && limit > 0 && limit <= 100 {
			query.Limit = limit
		}
	}

	if err := h.tableValidator.ValidateListTablesQuery(query); err != nil {
		logger.FromContext(ctx).WithError(err).Error("TableHandler::List -> validation failed")
		validationResponseError := contract.NewResponseError(constants.ValidationErrorCode, constants.RequestEntity, err.Error())
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "TableHandler::List")
		return
	}

	response := h.tableService.ListTables(ctx, &query)
	if response.HasErrors() {
		errorResp := response.GetErrors()[0]
		logger.FromContext(ctx).WithError(errorResp).Error("TableHandler::List -> service failed")
	}

	util.HandleResponse(c.Writer, c.Request, response, "TableHandler::List")
}

func (h *TableHandler) OccupyTable(c *gin.Context) {
	ctx := c.Request.Context()

	id := c.Param("id")
	tableID, err := uuid.Parse(id)
	if err != nil {
		logger.FromContext(ctx).WithError(err).Error("TableHandler::OccupyTable -> Invalid table ID")
		validationResponseError := contract.NewResponseError(constants.MalformedFieldErrorCode, constants.RequestEntity, "Invalid table ID")
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "TableHandler::OccupyTable")
		return
	}

	var req contract.OccupyTableRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		logger.FromContext(ctx).WithError(err).Error("TableHandler::OccupyTable -> request binding failed")
		validationResponseError := contract.NewResponseError(constants.MissingFieldErrorCode, constants.RequestEntity, err.Error())
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "TableHandler::OccupyTable")
		return
	}

	if err := h.tableValidator.ValidateOccupyTableRequest(req); err != nil {
		logger.FromContext(ctx).WithError(err).Error("TableHandler::OccupyTable -> validation failed")
		validationResponseError := contract.NewResponseError(constants.ValidationErrorCode, constants.RequestEntity, err.Error())
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "TableHandler::OccupyTable")
		return
	}

	response := h.tableService.OccupyTable(ctx, tableID, &req)
	if response.HasErrors() {
		errorResp := response.GetErrors()[0]
		logger.FromContext(ctx).WithError(errorResp).Error("TableHandler::OccupyTable -> service failed")
	}

	util.HandleResponse(c.Writer, c.Request, response, "TableHandler::OccupyTable")
}

func (h *TableHandler) ReleaseTable(c *gin.Context) {
	ctx := c.Request.Context()

	id := c.Param("id")
	tableID, err := uuid.Parse(id)
	if err != nil {
		logger.FromContext(ctx).WithError(err).Error("TableHandler::ReleaseTable -> Invalid table ID")
		validationResponseError := contract.NewResponseError(constants.MalformedFieldErrorCode, constants.RequestEntity, "Invalid table ID")
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "TableHandler::ReleaseTable")
		return
	}

	var req contract.ReleaseTableRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		logger.FromContext(ctx).WithError(err).Error("TableHandler::ReleaseTable -> request binding failed")
		validationResponseError := contract.NewResponseError(constants.MissingFieldErrorCode, constants.RequestEntity, err.Error())
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "TableHandler::ReleaseTable")
		return
	}

	if err := h.tableValidator.ValidateReleaseTableRequest(req); err != nil {
		logger.FromContext(ctx).WithError(err).Error("TableHandler::ReleaseTable -> validation failed")
		validationResponseError := contract.NewResponseError(constants.ValidationErrorCode, constants.RequestEntity, err.Error())
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "TableHandler::ReleaseTable")
		return
	}

	response := h.tableService.ReleaseTable(ctx, tableID, &req)
	if response.HasErrors() {
		errorResp := response.GetErrors()[0]
		logger.FromContext(ctx).WithError(errorResp).Error("TableHandler::ReleaseTable -> service failed")
	}

	util.HandleResponse(c.Writer, c.Request, response, "TableHandler::ReleaseTable")
}

func (h *TableHandler) GetAvailableTables(c *gin.Context) {
	ctx := c.Request.Context()

	outletIDStr := c.Param("outlet_id")
	outletID, err := uuid.Parse(outletIDStr)
	if err != nil {
		logger.FromContext(ctx).WithError(err).Error("TableHandler::GetAvailableTables -> Invalid outlet ID")
		validationResponseError := contract.NewResponseError(constants.MalformedFieldErrorCode, constants.RequestEntity, "Invalid outlet ID")
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "TableHandler::GetAvailableTables")
		return
	}

	response := h.tableService.GetAvailableTables(ctx, outletID)
	if response.HasErrors() {
		errorResp := response.GetErrors()[0]
		logger.FromContext(ctx).WithError(errorResp).Error("TableHandler::GetAvailableTables -> service failed")
	}

	util.HandleResponse(c.Writer, c.Request, response, "TableHandler::GetAvailableTables")
}

func (h *TableHandler) GetOccupiedTables(c *gin.Context) {
	ctx := c.Request.Context()

	outletIDStr := c.Param("outlet_id")
	outletID, err := uuid.Parse(outletIDStr)
	if err != nil {
		logger.FromContext(ctx).WithError(err).Error("TableHandler::GetOccupiedTables -> Invalid outlet ID")
		validationResponseError := contract.NewResponseError(constants.MalformedFieldErrorCode, constants.RequestEntity, "Invalid outlet ID")
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "TableHandler::GetOccupiedTables")
		return
	}

	response := h.tableService.GetOccupiedTables(ctx, outletID)
	if response.HasErrors() {
		errorResp := response.GetErrors()[0]
		logger.FromContext(ctx).WithError(errorResp).Error("TableHandler::GetOccupiedTables -> service failed")
	}

	util.HandleResponse(c.Writer, c.Request, response, "TableHandler::GetOccupiedTables")
}