// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package common

import (
	"database/sql/driver"
	"encoding/json"
	"math/big"
	"reflect"
	"strings"
	"testing"

	ethCommon "github.com/ethereum/go-ethereum/common"
)

func TestIsBech32Address(t *testing.T) {
	tests := []struct {
		str string
		exp bool
	}{
		{"one1ay37rp2pc3kjarg7a322vu3sa8j9puahg679z3", true},
		{"one1fdv7u7rll9epgcqv9xxh9lhwq427nsqldp8ua9", true},
		{"tone1fdv7u7rll9epgcqv9xxh9lhwq427nsqlr5wca5", true},
		{"tone1fdv7u7rll9epgcqv9xxh9lhwq427nsqlr5wca1", false},
		{"xone1fdv7u7rll9epgcqv9xxh9lhwq427nsqlr5wca5", false},
		{"ne1fdv7u7rll9epgcqv9xxh9lhwq427nsqlr5wca5", false},
		{"1one1fdv7u7rll9epgcqv9xxh9lhwq427nsqlr5wca5", false},
		{"one2fdv7u7rll9epgcqv9xxh9lhwq427nsqlr5wca5", false},
	}

	for _, test := range tests {
		if result := IsBech32Address(test.str); result != test.exp {
			t.Errorf("IsBech32Address(%s) == %v; expected %v",
				test.str, result, test.exp)
		}
	}
}

func TestHashJsonValidation(t *testing.T) {
	var tests = []struct {
		Prefix string
		Size   int
		Error  string
	}{
		{"", 62, "json: cannot unmarshal hex string without 0x prefix into Go value of type common.Hash"},
		{"0x", 66, "hex string has length 66, want 64 for common.Hash"},
		{"0x", 63, "json: cannot unmarshal hex string of odd length into Go value of type common.Hash"},
		{"0x", 0, "hex string has length 0, want 64 for common.Hash"},
		{"0x", 64, ""},
		{"0X", 64, ""},
	}
	for _, test := range tests {
		input := `"` + test.Prefix + strings.Repeat("0", test.Size) + `"`
		var v Hash
		err := json.Unmarshal([]byte(input), &v)
		if err == nil {
			if test.Error != "" {
				t.Errorf("%s: error mismatch: have nil, want %q", input, test.Error)
			}
		} else {
			if err.Error() != test.Error {
				t.Errorf("%s: error mismatch: have %q, want %q", input, err, test.Error)
			}
		}
	}
}

func TestAddressUnmarshalJSON(t *testing.T) {
	var tests = []struct {
		Input     string
		ShouldErr bool
		Output    *big.Int
	}{
		{"", true, nil},
		{`""`, true, nil},
		{`"0x"`, true, nil},
		{`"0x00"`, true, nil},
		{`"0xG000000000000000000000000000000000000000"`, true, nil},
		{`"0x0000000000000000000000000000000000000000"`, false, big.NewInt(0)},
		{`"0x0000000000000000000000000000000000000010"`, false, big.NewInt(16)},
	}
	for i, test := range tests {
		var v Address
		err := json.Unmarshal([]byte(test.Input), &v)
		if err != nil && !test.ShouldErr {
			t.Errorf("test #%d: unexpected error: %v", i, err)
		}
		if err == nil {
			if test.ShouldErr {
				t.Errorf("test #%d: expected error, got none", i)
			}
			if got := new(big.Int).SetBytes(v.Bytes()); got.Cmp(test.Output) != 0 {
				t.Errorf("test #%d: address mismatch: have %v, want %v", i, got, test.Output)
			}
		}
	}
}

func TestAddressHexChecksum(t *testing.T) {
	var tests = []struct {
		Input  string
		Output string
	}{
		// Test cases from https://github.com/ethereum/EIPs/blob/master/EIPS/eip-55.md#specification
		{"0x5aaeb6053f3e94c9b9a09f33669435e7ef1beaed", "0x5aAeb6053F3E94C9b9A09f33669435E7Ef1BeAed"},
		{"0xfb6916095ca1df60bb79ce92ce3ea74c37c5d359", "0xfB6916095ca1df60bB79Ce92cE3Ea74c37c5d359"},
		{"0xdbf03b407c01e7cd3cbea99509d93f8dddc8c6fb", "0xdbF03B407c01E7cD3CBea99509d93f8DDDC8C6FB"},
		{"0xd1220a0cf47c7b9be7a2e6ba89f429762e7b9adb", "0xD1220A0cf47c7B9Be7A2E6BA89F429762e7b9aDb"},
		// Ensure that non-standard length input values are handled correctly
		{"0xa", "0x000000000000000000000000000000000000000A"},
		{"0x0a", "0x000000000000000000000000000000000000000A"},
		{"0x00a", "0x000000000000000000000000000000000000000A"},
		{"0x000000000000000000000000000000000000000a", "0x000000000000000000000000000000000000000A"},
	}
	for i, test := range tests {
		output := HexToAddress(test.Input).Bech32()
		if output != test.Output {
			t.Errorf("test #%d: failed to match when it should (%s != %s)", i, output, test.Output)
		}
	}
}

func BenchmarkAddressBech32(b *testing.B) {
	testAddr := HexToAddress("0x5aaeb6053f3e94c9b9a09f33669435e7ef1beaed")
	for n := 0; n < b.N; n++ {
		testAddr.Bech32()
	}
}

func TestAddressToBech32(t *testing.T) {
	adr := ethCommon.HexToAddress("0x15a128e599b74842bccba860311efa92991bffb5")
	if address, err := AddressToBech32(adr); err == nil {
		if address != "one1zksj3evekayy90xt4psrz8h6j2v3hla4qwz4ur" {
			t.Errorf("error on parseAddr")
		}
	}
}

func TestAddress_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,
			}},
			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,
			}},
			wantErr: true,
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			a := &Address{}
			if err := a.Scan(tt.args.src); (err != nil) != tt.wantErr {
				t.Errorf("Address.Scan() error = %v, wantErr %v", err, tt.wantErr)
			}

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

func TestAddress_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,
	}
	var usedA Address
	usedA.SetBytes(b)
	tests := []struct {
		name    string
		a       Address
		want    driver.Value
		wantErr bool
	}{
		{
			name:    "Working value",
			a:       usedA,
			want:    b,
			wantErr: false,
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			got, err := tt.a.Value()
			if (err != nil) != tt.wantErr {
				t.Errorf("Address.Value() error = %v, wantErr %v", err, tt.wantErr)
				return
			}
			if !reflect.DeepEqual(got, tt.want) {
				t.Errorf("Address.Value() = %v, want %v", got, tt.want)
			}
		})
	}
}