package common

import (
	"database/sql/driver"
	"reflect"
	"testing"
)

func TestBytesConversion(t *testing.T) {
	bytes := []byte{5}
	hash := BytesToHash(bytes)

	var exp Hash
	exp[31] = 5

	if hash != exp {
		t.Errorf("expected %x got %x", exp, hash)
	}
}

func TestHash_Scan(t *testing.T) {
	type args struct {
		src interface{}
	}
	tests := []struct {
		name    string
		args    args
		wantErr bool
	}{
		{
			name: "working scan",
			args: args{src: []byte{
				0xb2, 0x6f, 0x2b, 0x34, 0x2a, 0xab, 0x24, 0xbc, 0xf6, 0x3e,
				0xa2, 0x18, 0xc6, 0xa9, 0x27, 0x4d, 0x30, 0xab, 0x9a, 0x15,
				0xa2, 0x18, 0xc6, 0xa9, 0x27, 0x4d, 0x30, 0xab, 0x9a, 0x15,
				0x10, 0x00,
			}},
			wantErr: false,
		},
		{
			name:    "non working scan",
			args:    args{src: int64(1234567890)},
			wantErr: true,
		},
		{
			name: "invalid length scan",
			args: args{src: []byte{
				0xb2, 0x6f, 0x2b, 0x34, 0x2a, 0xab, 0x24, 0xbc, 0xf6, 0x3e,
				0xa2, 0x18, 0xc6, 0xa9, 0x27, 0x4d, 0x30, 0xab, 0x9a, 0x15,
				0xa2, 0x18, 0xc6, 0xa9, 0x27, 0x4d, 0x30, 0xab, 0x9a, 0x15,
			}},
			wantErr: true,
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			h := &Hash{}
			if err := h.Scan(tt.args.src); (err != nil) != tt.wantErr {
				t.Errorf("Hash.Scan() error = %v, wantErr %v", err, tt.wantErr)
			}

			if !tt.wantErr {
				for i := range h {
					if h[i] != tt.args.src.([]byte)[i] {
						t.Errorf(
							"Hash.Scan() didn't scan the %d src correctly (have %X, want %X)",
							i, h[i], tt.args.src.([]byte)[i],
						)
					}
				}
			}
		})
	}
}

func TestHash_Value(t *testing.T) {
	b := []byte{
		0xb2, 0x6f, 0x2b, 0x34, 0x2a, 0xab, 0x24, 0xbc, 0xf6, 0x3e,
		0xa2, 0x18, 0xc6, 0xa9, 0x27, 0x4d, 0x30, 0xab, 0x9a, 0x15,
		0xa2, 0x18, 0xc6, 0xa9, 0x27, 0x4d, 0x30, 0xab, 0x9a, 0x15,
		0x10, 0x00,
	}
	var usedH Hash
	usedH.SetBytes(b)
	tests := []struct {
		name    string
		h       Hash
		want    driver.Value
		wantErr bool
	}{
		{
			name:    "Working value",
			h:       usedH,
			want:    b,
			wantErr: false,
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			got, err := tt.h.Value()
			if (err != nil) != tt.wantErr {
				t.Errorf("Hash.Value() error = %v, wantErr %v", err, tt.wantErr)
				return
			}
			if !reflect.DeepEqual(got, tt.want) {
				t.Errorf("Hash.Value() = %v, want %v", got, tt.want)
			}
		})
	}
}