package cli

import (
	"testing"
)

func TestParseBandwidth(t *testing.T) {
	tests := []struct {
		input   string
		want    int64
		wantErr bool
	}{
		{"", 0, false},
		{"0", 0, false},
		{"1024", 1024, false},
		{"1K", 1024, false},
		{"1KB", 1024, false},
		{"1k", 1024, false},
		{"1M", 1024 * 1024, false},
		{"1MB", 1024 * 1024, false},
		{"1m", 1024 * 1024, false},
		{"10M", 10 * 1024 * 1024, false},
		{"1G", 1024 * 1024 * 1024, false},
		{"1GB", 1024 * 1024 * 1024, false},
		{"500K", 500 * 1024, false},
		{"100M", 100 * 1024 * 1024, false},
		{" 1M ", 1024 * 1024, false},
		{"1B", 1, false},
		{"100B", 100, false},
		{"invalid", 0, true},
		{"abc", 0, true},
		{"-1M", 0, true},
		{"-100", 0, true},
		{"1.5M", 0, true},
		{"M", 0, true},
		{"K", 0, true},
		{"9223372036854775807K", 0, true},
		{"9999999999999999999G", 0, true},
	}

	for _, tt := range tests {
		t.Run(tt.input, func(t *testing.T) {
			got, err := parseBandwidth(tt.input)
			if tt.wantErr {
				if err == nil {
					t.Errorf("parseBandwidth(%q) = %d, want error", tt.input, got)
				}
				return
			}
			if err != nil {
				t.Errorf("parseBandwidth(%q) unexpected error: %v", tt.input, err)
				return
			}
			if got != tt.want {
				t.Errorf("parseBandwidth(%q) = %d, want %d", tt.input, got, tt.want)
			}
		})
	}
}