package uploads_test

import (
	"errors"
	"testing"
	"time"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	"git.d-ma.be/mathias/tapir/internal/uploads"
)

var testLimits = uploads.Limits{MaxBytes: 200 << 20, MaxDuration: 90 * time.Minute}

func TestValidate(t *testing.T) {
	tests := []struct {
		name       string
		probe      uploads.Probe
		wantReason uploads.Reason // "" = accepted
		wantInMsg  []string
	}{
		{
			name:  "audio-only file within the duration limit is accepted",
			probe: uploads.Probe{Duration: 45 * time.Minute, HasAudio: true},
		},
		{
			name:  "a recording exactly at the limit is accepted",
			probe: uploads.Probe{Duration: 90 * time.Minute, HasAudio: true},
		},
		{
			name:  "a recording that also has a video stream is accepted: the audio is what is used",
			probe: uploads.Probe{Duration: 4 * time.Minute, HasAudio: true, HasVideo: true},
		},
		{
			name:       "video with no audio is rejected as having no audio, and says so",
			probe:      uploads.Probe{Duration: 4 * time.Minute, HasVideo: true},
			wantReason: uploads.ReasonNoAudio,
			wantInMsg:  []string{"no audio"},
		},
		{
			name:       "a file with no audio stream is rejected",
			probe:      uploads.Probe{Duration: 4 * time.Minute},
			wantReason: uploads.ReasonNoAudio,
			wantInMsg:  []string{"no audio"},
		},
		{
			name:       "a recording over the limit is rejected, stating both lengths",
			probe:      uploads.Probe{Duration: 102 * time.Minute, HasAudio: true},
			wantReason: uploads.ReasonTooLong,
			wantInMsg:  []string{"1 h 42 min", "1 h 30 min"},
		},
		{
			name:       "zero duration is unreadable, not accepted as an empty recording",
			probe:      uploads.Probe{HasAudio: true},
			wantReason: uploads.ReasonUnreadable,
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			err := uploads.Validate(tt.probe, testLimits)

			if tt.wantReason == "" {
				require.NoError(t, err)
				return
			}
			var rej *uploads.RejectError
			require.True(t, errors.As(err, &rej), "want a *RejectError, got %v", err)
			assert.Equal(t, tt.wantReason, rej.Reason)
			for _, s := range tt.wantInMsg {
				assert.Contains(t, rej.Message, s)
			}
		})
	}
}

func TestFormatDuration(t *testing.T) {
	tests := []struct {
		d    time.Duration
		want string
	}{
		{90 * time.Minute, "1 h 30 min"},
		{102 * time.Minute, "1 h 42 min"},
		{45 * time.Minute, "45 min"},
		{2 * time.Hour, "2 h"},
		{30 * time.Second, "30 s"},
	}
	for _, tt := range tests {
		t.Run(tt.want, func(t *testing.T) {
			assert.Equal(t, tt.want, uploads.FormatDuration(tt.d))
		})
	}
}