package services

import (
	"net/http"
	"strconv"
	"time"
	"wm-backend/global"
	"wm-backend/internal/models"
	"wm-backend/internal/models/requests"
	"wm-backend/internal/models/responses"
	"wm-backend/internal/repositories"
	"wm-backend/pkg/helper"
	"wm-backend/response"

	"github.com/gin-gonic/gin"
	"github.com/rs/zerolog/log"
)

// RoomCreate creates a new room.
// It validates the request body and creates the room in the database.
//
// @Summary      Create a new room
// @Description  Create a new room with the provided details
// @Tags         room
// @Accept       json
// @Produce      json
// @Param        body  body  requests.CreateRoomRequest  true  "Room request body"
// @Success      201   {object}  response.SuccessResponse{data=responses.CreateRoomResponse}
// @Failure      400   {object}  response.ErrorResponse
// @Failure      500   {object}  response.ErrorResponse
// @Router       /v1/rooms [post]
func RoomCreate(c *gin.Context) error {
	requestBody := requests.CreateRoomRequest{}
	if helper.IsShouldBindJSON(c, &requestBody) {
		return nil
	}
	roomModel := &models.Room{
		WarehouseID: requestBody.WarehouseID,
		Name:        requestBody.Name,
		Description: requestBody.Description,
		CreatedAt:   time.Now(),
	}
	room, err := repositories.CreateRoom(c.Request.Context(), global.Queries, *roomModel)
	if err != nil {
		log.Error().Err(err).Msg("Failed to create room")
		response.InternalServerError(c, http.StatusInternalServerError, "Failed to create room")
		return nil
	}
	response.Created(c, "Room created successfully", &responses.CreateRoomResponse{
		ID: room.ID,
	})
	return nil
}

// RoomGetByID retrieves a single room by its ID.
//
// @Summary      Get room by ID
// @Description  Retrieve a single room using its unique identifier
// @Tags         room
// @Accept       json
// @Produce      json
// @Param        id   path      int  true  "Room ID"
// @Success      200  {object}  response.SuccessResponse{data=models.Room}
// @Failure      400  {object}  response.ErrorResponse
// @Failure      404  {object}  response.ErrorResponse
// @Failure      500  {object}  response.ErrorResponse
// @Router       /v1/rooms/{id} [get]
func RoomGetByID(c *gin.Context) error {
	id, err := strconv.ParseInt(c.Param("id"), 10, 64)
	if err != nil {
		response.BadRequestError(c, http.StatusBadRequest, "Invalid ID")
		return nil
	}
	room, err := repositories.GetRoomByID(c.Request.Context(), global.Queries, id)
	if err != nil {
		log.Error().Err(err).Msgf("Failed to get room by ID: %d", id)
		response.NotFoundError(c, http.StatusNotFound, "Room not found")
		return nil
	}
	response.Ok(c, "Success", room)
	return nil
}

// RoomList retrieves all rooms.
//
// @Summary      List all rooms
// @Description  Retrieve a list of all rooms ordered by creation date
// @Tags         room
// @Accept       json
// @Produce      json
// @Success      200  {object}  response.SuccessResponse{data=[]models.Room}
// @Failure      500  {object}  response.ErrorResponse
// @Router       /v1/rooms [get]
func RoomList(c *gin.Context) error {
	rooms, err := repositories.ListRooms(c.Request.Context(), global.Queries)
	if err != nil {
		response.InternalServerError(c, http.StatusInternalServerError, "Failed to list rooms")
		return nil
	}
	response.Ok(c, "Success", rooms)
	return nil
}

// RoomUpdate updates an existing room by its ID.
// It validates the request body, fetches the existing record,
// merges non-empty fields from the request, and updates the room in the database.
//
// @Summary      Update room
// @Description  Update an existing room by its ID. Only non-empty fields will be updated.
// @Tags         room
// @Accept       json
// @Produce      json
// @Param        id    path      int                       true  "Room ID"
// @Param        body  body      requests.UpdateRoomRequest  true  "Room request body"
// @Success      200   {object}  response.SuccessResponse{data=responses.UpdateRoomResponse}
// @Failure      400   {object}  response.ErrorResponse
// @Failure      404   {object}  response.ErrorResponse
// @Failure      500   {object}  response.ErrorResponse
// @Router       /v1/rooms/{id} [put]
func RoomUpdate(c *gin.Context) error {
	id, err := strconv.ParseInt(c.Param("id"), 10, 64)
	if err != nil {
		response.BadRequestError(c, http.StatusBadRequest, "Invalid ID")
		return nil
	}
	requestBody := requests.UpdateRoomRequest{}
	if helper.IsShouldBindJSON(c, &requestBody) {
		return nil
	}
	existing, err := repositories.GetRoomByID(c.Request.Context(), global.Queries, id)
	if err != nil {
		response.NotFoundError(c, http.StatusNotFound, "Room not found")
		return nil
	}
	if requestBody.Name != "" {
		existing.Name = requestBody.Name
	}
	if requestBody.Description != "" {
		existing.Description = requestBody.Description
	}
	existing.UpdatedAt = time.Now()
	room, err := repositories.UpdateRoom(c.Request.Context(), global.Queries, existing)
	if err != nil {
		log.Error().Err(err).Msgf("Failed to update room with ID: %d", id)
		response.InternalServerError(c, http.StatusInternalServerError, "Failed to update room")
		return nil
	}
	response.Ok(c, "Room updated successfully", &responses.UpdateRoomResponse{
		ID:          room.ID,
		WarehouseID: room.WarehouseID,
		Name:        room.Name,
		Description: room.Description,
	})
	return nil
}

// RoomDelete deletes a room by its ID.
//
// @Summary      Delete room
// @Description  Delete a room by its unique identifier
// @Tags         room
// @Accept       json
// @Produce      json
// @Param        id   path      int  true  "Room ID"
// @Success      200  {object}  response.SuccessResponse
// @Failure      400  {object}  response.ErrorResponse
// @Failure      500  {object}  response.ErrorResponse
// @Router       /v1/rooms/{id} [delete]
func RoomDelete(c *gin.Context) error {
	id, err := strconv.ParseInt(c.Param("id"), 10, 64)
	if err != nil {
		response.BadRequestError(c, http.StatusBadRequest, "Invalid ID")
		return nil
	}
	err = repositories.DeleteRoom(c.Request.Context(), global.Queries, id)
	if err != nil {
		log.Error().Err(err).Msgf("Failed to delete room with ID: %d", id)
		response.InternalServerError(c, http.StatusInternalServerError, "Failed to delete room")
		return nil
	}
	response.Ok(c, "Đã xóa thành công", nil)
	return nil
}