// Package handler provides HTTP handlers for various endpoints.
package handler

import (
	"net/http"

	"modelRT/constants"
	"modelRT/database"
	"modelRT/diagram"
	"modelRT/logger"
	"modelRT/network"

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

// MeasurementGetHandler define measurement query API
func MeasurementGetHandler(c *gin.Context) {
	var request network.MeasurementGetRequest

	clientToken := c.GetString("client_token")
	if clientToken == "" {
		err := constants.ErrGetClientToken

		logger.Error(c, "failed to get client token from context", "error", err)
		c.JSON(http.StatusOK, network.FailureResponse{
			Code: http.StatusBadRequest,
			Msg:  err.Error(),
		})
		return
	}

	if err := c.ShouldBindJSON(&request); err != nil {
		logger.Error(c, "failed to unmarshal measurement get request", "error", err)
		c.JSON(http.StatusOK, network.FailureResponse{
			Code: http.StatusBadRequest,
			Msg:  err.Error(),
		})
		return
	}

	zset := diagram.NewRedisZSet(c, request.MeasurementToken, clientToken, 0, false)
	points, err := zset.ZRANGE(request.MeasurementToken, 0, -1)
	if err != nil {
		logger.Error(c, "failed to get measurement data from redis", "measurement_token", request.MeasurementToken, "error", err)
		c.JSON(http.StatusOK, network.FailureResponse{
			Code: http.StatusInternalServerError,
			Msg:  err.Error(),
			PayLoad: map[string]interface{}{
				"measurement_id":    request.MeasurementID,
				"measurement_token": request.MeasurementToken,
			},
		})
		return
	}

	pgClient := database.GetPostgresDBClient()
	measurementInfo, err := database.QueryMeasurementByID(c, pgClient, request.MeasurementID)
	if err != nil {
		logger.Error(c, "failed to query measurement by id", "measurement_id", request.MeasurementID, "error", err)
		c.JSON(http.StatusOK, network.FailureResponse{
			Code: http.StatusBadRequest,
			Msg:  err.Error(),
			PayLoad: map[string]interface{}{
				"measurement_id":    request.MeasurementID,
				"measurement_token": request.MeasurementToken,
				"measurement_value": points,
			},
		})
		return
	}

	c.JSON(http.StatusOK, network.SuccessResponse{
		Code: http.StatusOK,
		Msg:  "success",
		PayLoad: map[string]interface{}{
			"measurement_id":    request.MeasurementID,
			"measurement_token": request.MeasurementToken,
			"measurement_info":  measurementInfo,
			"measurement_value": points,
		},
	})
}