package config

import (
	"testing"

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

func TestUploadLimit_DefaultBytesAndMB(t *testing.T) {
	t.Setenv(AudioLimit.EnvVar, "")
	t.Setenv(ImageLimit.EnvVar, "")
	t.Setenv(VideoLimit.EnvVar, "")

	assert.Equal(t, 100, AudioLimit.MB(), "audio default must match historical 100MB value")
	assert.Equal(t, int64(100*1024*1024), AudioLimit.Bytes())
	assert.Equal(t, "100MB", AudioLimit.HumanReadable())

	assert.Equal(t, 10, ImageLimit.MB())
	assert.Equal(t, int64(10*1024*1024), ImageLimit.Bytes())
	assert.Equal(t, "10MB", ImageLimit.HumanReadable())

	assert.Equal(t, 500, VideoLimit.MB())
	assert.Equal(t, int64(500*1024*1024), VideoLimit.Bytes())
}

func TestUploadLimit_EnvOverride(t *testing.T) {
	t.Setenv(AudioLimit.EnvVar, "250")

	assert.Equal(t, 250, AudioLimit.MB())
	assert.Equal(t, int64(250*1024*1024), AudioLimit.Bytes())
	assert.Equal(t, "250MB", AudioLimit.HumanReadable())
}

func TestUploadLimit_InvalidEnvFallsBackToDefault(t *testing.T) {
	t.Setenv(AudioLimit.EnvVar, "not-a-number")
	assert.Equal(t, DefaultAudioMaxMB, AudioLimit.MB(),
		"non-numeric env must fall back to default")

	t.Setenv(AudioLimit.EnvVar, "-50")
	assert.Equal(t, DefaultAudioMaxMB, AudioLimit.MB(),
		"negative env must fall back to default")

	t.Setenv(AudioLimit.EnvVar, "0")
	assert.Equal(t, DefaultAudioMaxMB, AudioLimit.MB(),
		"zero env must fall back to default")
}

func TestUploadLimit_AllowedMIMEsAreNonEmpty(t *testing.T) {
	for _, l := range []UploadLimitMB{AudioLimit, ImageLimit, VideoLimit} {
		assert.NotEmpty(t, l.AllowedMIMEs, "category %s must declare its MIME list", l.Category)
	}
}