package ride_test

import (
	"fmt"
	"strings"
	"testing"
	"time"

	"github.com/martinlehoux/biking_home/ride"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func gpxWithPoints(t *testing.T, points string) ride.Ride {
	t.Helper()
	data := parserTestGPXPrefix + points + parserTestGPXSuffix
	parsed, err := (ride.GPXRideParser{}).Parse(strings.NewReader(data))
	require.NoError(t, err)
	return parsed
}

func trackPoint(lat, lon string, timestamp string) string {
	return `<trkpt lat="` + lat + `" lon="` + lon + `">` +
		`<ele>100</ele>` +
		`<time>` + timestamp + `</time>` +
		`</trkpt>`
}

func metricTrackPoint(lat, lon, timestamp string, cadence, power int) string {
	return `<trkpt lat="` + lat + `" lon="` + lon + `">` +
		`<ele>100</ele>` +
		`<time>` + timestamp + `</time>` +
		`<extensions><gpxtpx:TrackPointExtension>` +
		`<gpxtpx:cad>` + fmt.Sprint(cadence) + `</gpxtpx:cad>` +
		`<gpxtpx:watts>` + fmt.Sprint(power) + `</gpxtpx:watts>` +
		`</gpxtpx:TrackPointExtension></extensions>` +
		`</trkpt>`
}

func TestMovingTimeCountsSteadyRiding(t *testing.T) {
	parsed := gpxWithPoints(t,
		trackPoint("43.0", "5.0", "2026-01-01T10:00:00Z")+
			trackPoint("43.009", "5.0", "2026-01-01T10:01:00Z")+
			trackPoint("43.018", "5.0", "2026-01-01T10:02:00Z"),
	)

	assert.Equal(t, 2*time.Minute, ride.MovingTime(parsed))
}

func TestMovingTimeExcludesSlowInterval(t *testing.T) {
	parsed := gpxWithPoints(t,
		trackPoint("43.0", "5.0", "2026-01-01T10:00:00Z")+
			trackPoint("43.0005", "5.0", "2026-01-01T10:10:00Z")+
			trackPoint("43.009", "5.0", "2026-01-01T10:12:00Z"),
	)

	assert.Equal(t, 2*time.Minute, ride.MovingTime(parsed))
}

func TestMovingTimeExcludesLunchBreak(t *testing.T) {
	parsed := gpxWithPoints(t,
		trackPoint("43.0", "5.0", "2026-01-01T10:00:00Z")+
			trackPoint("43.0001", "5.0", "2026-01-01T10:30:00Z")+
			trackPoint("43.009", "5.0", "2026-01-01T10:31:00Z"),
	)

	assert.Equal(t, time.Minute, ride.MovingTime(parsed))
}

func TestMovingTimeCountsEffortMetricsWhenGPSSpeedIsLow(t *testing.T) {
	data := parserTestGPXMetricsPrefix +
		metricTrackPoint("43.0", "5.0", "2026-01-01T10:00:00Z", 0, 0) +
		metricTrackPoint("43.000001", "5.0", "2026-01-01T10:01:00Z", 80, 0) +
		metricTrackPoint("43.000002", "5.0", "2026-01-01T10:02:00Z", 0, 50) +
		metricTrackPoint("43.000003", "5.0", "2026-01-01T10:03:00Z", 0, 10) +
		metricTrackPoint("43.000004", "5.0", "2026-01-01T10:04:00Z", 0, 0) +
		parserTestGPXSuffix
	parsed, err := (ride.GPXRideParser{}).Parse(strings.NewReader(data))
	require.NoError(t, err)

	assert.Equal(t, 2*time.Minute, ride.MovingTime(parsed))
}

func TestMovingTimeWithoutTimestamps(t *testing.T) {
	data := parserTestGPXPrefix +
		`<trkpt lat="43.0" lon="5.0"><ele>100</ele></trkpt>` +
		`<trkpt lat="43.009" lon="5.0"><ele>100</ele></trkpt>` +
		parserTestGPXSuffix

	parsed, err := (ride.GPXRideParser{}).Parse(strings.NewReader(data))
	require.NoError(t, err)

	assert.Equal(t, time.Duration(0), ride.MovingTime(parsed))
}

func TestMovingTimeAlgorithmVersion(t *testing.T) {
	assert.Equal(t, "v2", ride.MovingTimeAlgorithmVersion)
}