package handler

import (
	"apskel-pos-be/internal/contract"
	"apskel-pos-be/internal/service"
	"net/http"
	"strconv"

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

type TableHandler struct {
	tableService *service.TableService
}

func NewTableHandler(tableService *service.TableService) *TableHandler {
	return &TableHandler{
		tableService: tableService,
	}
}

// CreateTable godoc
// @Summary Create a new table
// @Description Create a new table for the organization
// @Tags tables
// @Accept json
// @Produce json
// @Param table body contract.CreateTableRequest true "Table data"
// @Success 201 {object} contract.TableResponse
// @Failure 400 {object} contract.ResponseError
// @Failure 401 {object} contract.ResponseError
// @Failure 500 {object} contract.ResponseError
// @Router /tables [post]
func (h *TableHandler) Create(c *gin.Context) {
	var req contract.CreateTableRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, contract.ResponseError{
			Error:   "Invalid request body",
			Message: err.Error(),
		})
		return
	}

	organizationID := c.GetString("organization_id")
	orgID, err := uuid.Parse(organizationID)
	if err != nil {
		c.JSON(http.StatusBadRequest, contract.ResponseError{
			Error:   "Invalid organization ID",
			Message: err.Error(),
		})
		return
	}

	response, err := h.tableService.Create(c.Request.Context(), req, orgID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, contract.ResponseError{
			Error:   "Failed to create table",
			Message: err.Error(),
		})
		return
	}

	c.JSON(http.StatusCreated, response)
}

// GetTable godoc
// @Summary Get table by ID
// @Description Get table details by ID
// @Tags tables
// @Produce json
// @Param id path string true "Table ID"
// @Success 200 {object} contract.TableResponse
// @Failure 400 {object} contract.ResponseError
// @Failure 404 {object} contract.ResponseError
// @Failure 500 {object} contract.ResponseError
// @Router /tables/{id} [get]
func (h *TableHandler) GetByID(c *gin.Context) {
	id := c.Param("id")
	tableID, err := uuid.Parse(id)
	if err != nil {
		c.JSON(http.StatusBadRequest, contract.ResponseError{
			Error:   "Invalid table ID",
			Message: err.Error(),
		})
		return
	}

	response, err := h.tableService.GetByID(c.Request.Context(), tableID)
	if err != nil {
		c.JSON(http.StatusNotFound, contract.ResponseError{
			Error:   "Table not found",
			Message: err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, response)
}

// UpdateTable godoc
// @Summary Update table
// @Description Update table details
// @Tags tables
// @Accept json
// @Produce json
// @Param id path string true "Table ID"
// @Param table body contract.UpdateTableRequest true "Table update data"
// @Success 200 {object} contract.TableResponse
// @Failure 400 {object} contract.ResponseError
// @Failure 404 {object} contract.ResponseError
// @Failure 500 {object} contract.ResponseError
// @Router /tables/{id} [put]
func (h *TableHandler) Update(c *gin.Context) {
	id := c.Param("id")
	tableID, err := uuid.Parse(id)
	if err != nil {
		c.JSON(http.StatusBadRequest, contract.ResponseError{
			Error:   "Invalid table ID",
			Message: err.Error(),
		})
		return
	}

	var req contract.UpdateTableRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, contract.ResponseError{
			Error:   "Invalid request body",
			Message: err.Error(),
		})
		return
	}

	response, err := h.tableService.Update(c.Request.Context(), tableID, req)
	if err != nil {
		c.JSON(http.StatusInternalServerError, contract.ResponseError{
			Error:   "Failed to update table",
			Message: err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, response)
}

// DeleteTable godoc
// @Summary Delete table
// @Description Delete table by ID
// @Tags tables
// @Produce json
// @Param id path string true "Table ID"
// @Success 204 "No Content"
// @Failure 400 {object} contract.ResponseError
// @Failure 404 {object} contract.ResponseError
// @Failure 500 {object} contract.ResponseError
// @Router /tables/{id} [delete]
func (h *TableHandler) Delete(c *gin.Context) {
	id := c.Param("id")
	tableID, err := uuid.Parse(id)
	if err != nil {
		c.JSON(http.StatusBadRequest, contract.ResponseError{
			Error:   "Invalid table ID",
			Message: err.Error(),
		})
		return
	}

	err = h.tableService.Delete(c.Request.Context(), tableID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, contract.ResponseError{
			Error:   "Failed to delete table",
			Message: err.Error(),
		})
		return
	}

	c.Status(http.StatusNoContent)
}

// ListTables godoc
// @Summary List tables
// @Description Get paginated list of tables
// @Tags tables
// @Produce json
// @Param organization_id query string false "Organization ID"
// @Param outlet_id query string false "Outlet ID"
// @Param status query string false "Table status"
// @Param is_active query string false "Is active"
// @Param search query string false "Search term"
// @Param page query int false "Page number" default(1)
// @Param limit query int false "Page size" default(10)
// @Success 200 {object} contract.ListTablesResponse
// @Failure 400 {object} contract.ResponseError
// @Failure 500 {object} contract.ResponseError
// @Router /tables [get]
func (h *TableHandler) List(c *gin.Context) {
	query := contract.ListTablesQuery{
		OrganizationID: c.Query("organization_id"),
		OutletID:       c.Query("outlet_id"),
		Status:         c.Query("status"),
		IsActive:       c.Query("is_active"),
		Search:         c.Query("search"),
		Page:           1,
		Limit:          10,
	}

	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
		}
	}

	response, err := h.tableService.List(c.Request.Context(), query)
	if err != nil {
		c.JSON(http.StatusInternalServerError, contract.ResponseError{
			Error:   "Failed to list tables",
			Message: err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, response)
}

// OccupyTable godoc
// @Summary Occupy table
// @Description Occupy a table with an order
// @Tags tables
// @Accept json
// @Produce json
// @Param id path string true "Table ID"
// @Param request body contract.OccupyTableRequest true "Occupy table data"
// @Success 200 {object} contract.TableResponse
// @Failure 400 {object} contract.ResponseError
// @Failure 404 {object} contract.ResponseError
// @Failure 500 {object} contract.ResponseError
// @Router /tables/{id}/occupy [post]
func (h *TableHandler) OccupyTable(c *gin.Context) {
	id := c.Param("id")
	tableID, err := uuid.Parse(id)
	if err != nil {
		c.JSON(http.StatusBadRequest, contract.ResponseError{
			Error:   "Invalid table ID",
			Message: err.Error(),
		})
		return
	}

	var req contract.OccupyTableRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, contract.ResponseError{
			Error:   "Invalid request body",
			Message: err.Error(),
		})
		return
	}

	response, err := h.tableService.OccupyTable(c.Request.Context(), tableID, req)
	if err != nil {
		c.JSON(http.StatusInternalServerError, contract.ResponseError{
			Error:   "Failed to occupy table",
			Message: err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, response)
}

// ReleaseTable godoc
// @Summary Release table
// @Description Release a table and record payment amount
// @Tags tables
// @Accept json
// @Produce json
// @Param id path string true "Table ID"
// @Param request body contract.ReleaseTableRequest true "Release table data"
// @Success 200 {object} contract.TableResponse
// @Failure 400 {object} contract.ResponseError
// @Failure 404 {object} contract.ResponseError
// @Failure 500 {object} contract.ResponseError
// @Router /tables/{id}/release [post]
func (h *TableHandler) ReleaseTable(c *gin.Context) {
	id := c.Param("id")
	tableID, err := uuid.Parse(id)
	if err != nil {
		c.JSON(http.StatusBadRequest, contract.ResponseError{
			Error:   "Invalid table ID",
			Message: err.Error(),
		})
		return
	}

	var req contract.ReleaseTableRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, contract.ResponseError{
			Error:   "Invalid request body",
			Message: err.Error(),
		})
		return
	}

	response, err := h.tableService.ReleaseTable(c.Request.Context(), tableID, req)
	if err != nil {
		c.JSON(http.StatusInternalServerError, contract.ResponseError{
			Error:   "Failed to release table",
			Message: err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, response)
}

// GetAvailableTables godoc
// @Summary Get available tables
// @Description Get list of available tables for an outlet
// @Tags tables
// @Produce json
// @Param outlet_id path string true "Outlet ID"
// @Success 200 {array} contract.TableResponse
// @Failure 400 {object} contract.ResponseError
// @Failure 500 {object} contract.ResponseError
// @Router /outlets/{outlet_id}/tables/available [get]
func (h *TableHandler) GetAvailableTables(c *gin.Context) {
	outletIDStr := c.Param("outlet_id")
	outletID, err := uuid.Parse(outletIDStr)
	if err != nil {
		c.JSON(http.StatusBadRequest, contract.ResponseError{
			Error:   "Invalid outlet ID",
			Message: err.Error(),
		})
		return
	}

	tables, err := h.tableService.GetAvailableTables(c.Request.Context(), outletID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, contract.ResponseError{
			Error:   "Failed to get available tables",
			Message: err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, tables)
}

// GetOccupiedTables godoc
// @Summary Get occupied tables
// @Description Get list of occupied tables for an outlet
// @Tags tables
// @Produce json
// @Param outlet_id path string true "Outlet ID"
// @Success 200 {array} contract.TableResponse
// @Failure 400 {object} contract.ResponseError
// @Failure 500 {object} contract.ResponseError
// @Router /outlets/{outlet_id}/tables/occupied [get]
func (h *TableHandler) GetOccupiedTables(c *gin.Context) {
	outletIDStr := c.Param("outlet_id")
	outletID, err := uuid.Parse(outletIDStr)
	if err != nil {
		c.JSON(http.StatusBadRequest, contract.ResponseError{
			Error:   "Invalid outlet ID",
			Message: err.Error(),
		})
		return
	}

	tables, err := h.tableService.GetOccupiedTables(c.Request.Context(), outletID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, contract.ResponseError{
			Error:   "Failed to get occupied tables",
			Message: err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, tables)
}