package sensor

import (
	"context"
	"fmt"
	"math"
	"sync"

	"github.com/go-flucky/flucky/pkg/internal/collect"
	"github.com/go-flucky/flucky/pkg/internal/prittyprint"
	"github.com/go-flucky/flucky/pkg/types"
)

// ReadHumidities returns a list of measured humidities by humidity sensors
func ReadHumidities(humiditySensors []HumiditySensor, round float64) ([]*types.Humidity, error) {
	humidityChannel := make(chan *types.Humidity, len(humiditySensors))
	errorChannel := make(chan error, len(humiditySensors))

	wg := new(sync.WaitGroup)
	wg.Add(len(humiditySensors))

	for _, humiditySensor := range humiditySensors {
		go humiditySensor.ReadHumidityWriteIntoChannel(humidityChannel, errorChannel, wg)
	}

	wg.Wait()

	errors := collect.Errors(errorChannel)
	if len(errors) > 0 {
		return nil, prittyprint.FormatErrors(errors)
	}

	humidities := collect.Humidities(humidityChannel)

	if round != 0 {
		for _, humidity := range humidities {
			humidity.HumidityValue = math.Round(humidity.HumidityValue/round) * round
		}
	}

	return humidities, nil
}

// ReadHumiditiesWriteIntoChannel reads the humidity values of humidity sensors and writes them into a channel
func ReadHumiditiesWriteIntoChannel(ctx context.Context, humiditySensors []HumiditySensor, humidityChannel chan<- *types.Humidity, errorChannel chan<- error, wg *sync.WaitGroup) {
	for _, humiditySensor := range humiditySensors {
		humiditySensor.ReadHumidityWriteIntoChannel(humidityChannel, errorChannel, wg)
	}
}

// ReadHumiditiesContinuously reads the humidity values of humidity sensors continuously and writes them into a channel
func ReadHumiditiesContinuously(ctx context.Context, humiditySensors []HumiditySensor, humidityChannel chan<- *types.Humidity, errorChannel chan<- error) {
	for {
		select {
		case <-ctx.Done():
			errorChannel <- fmt.Errorf("Context closed: %v", ctx.Err())
			return
		default:
			ReadHumiditiesWriteIntoChannel(ctx, humiditySensors, humidityChannel, errorChannel, nil)
		}
	}
}

// ReadTemperatures returns a list of measured temperatures by temperature sensors
func ReadTemperatures(temperatureSensors []TemperatureSensor, round float64) ([]*types.Temperature, error) {
	temperatureChannel := make(chan *types.Temperature, len(temperatureSensors))
	errorChannel := make(chan error, len(temperatureSensors))

	wg := new(sync.WaitGroup)
	wg.Add(len(temperatureSensors))

	for _, temperatureSensor := range temperatureSensors {
		go temperatureSensor.ReadTemperatureWriteIntoChannel(temperatureChannel, errorChannel, wg)
	}

	wg.Wait()

	errors := collect.Errors(errorChannel)
	if len(errors) > 0 {
		return nil, prittyprint.FormatErrors(errors)
	}

	temperatures := collect.Temperatures(temperatureChannel)

	if round != 0 {
		for _, temperature := range temperatures {
			temperature.TemperatureValue = math.Round(temperature.TemperatureValue/round) * round
		}
	}

	return temperatures, nil
}

// ReadTemperaturesWriteIntoChannel reads the temperature values of temperature sensors and writes them into a channel
func ReadTemperaturesWriteIntoChannel(ctx context.Context, temperatureSensors []TemperatureSensor, temperatureChannel chan<- *types.Temperature, errorChannel chan<- error, wg *sync.WaitGroup) {
	for _, temperatureSensor := range temperatureSensors {
		temperatureSensor.ReadTemperatureWriteIntoChannel(temperatureChannel, errorChannel, wg)
	}

}

// ReadTemperaturesContinuously reads the temperature values of temperature sensors continuously and writes them into a chann
func ReadTemperaturesContinuously(ctx context.Context, temperatureSensors []TemperatureSensor, temperatureChannel chan<- *types.Temperature, errorChannel chan<- error) {
	for {
		select {
		case <-ctx.Done():
			errorChannel <- fmt.Errorf("Context closed: %v", ctx.Err())
			return
		default:
			ReadTemperaturesWriteIntoChannel(ctx, temperatureSensors, temperatureChannel, errorChannel, nil)
		}
	}
}