// Copyright (c) 2013-2021 Jack Christensen
//
// MIT License
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

package sanitize_test

import (
	"testing"
	"time"

	"github.com/redpanda-data/connect/v4/internal/impl/postgresql/pglogicalstream/sanitize"
)

func TestNewQuery(t *testing.T) {
	successTests := []struct {
		sql      string
		expected sanitize.Query
	}{
		{
			sql:      "select 42",
			expected: sanitize.Query{Parts: []sanitize.Part{"select 42"}},
		},
		{
			sql:      "select $1",
			expected: sanitize.Query{Parts: []sanitize.Part{"select ", 1}},
		},
		{
			sql:      "select 'quoted $42', $1",
			expected: sanitize.Query{Parts: []sanitize.Part{"select 'quoted $42', ", 1}},
		},
		{
			sql:      `select "doubled quoted $42", $1`,
			expected: sanitize.Query{Parts: []sanitize.Part{`select "doubled quoted $42", `, 1}},
		},
		{
			sql:      "select 'foo''bar', $1",
			expected: sanitize.Query{Parts: []sanitize.Part{"select 'foo''bar', ", 1}},
		},
		{
			sql:      `select "foo""bar", $1`,
			expected: sanitize.Query{Parts: []sanitize.Part{`select "foo""bar", `, 1}},
		},
		{
			sql:      "select '''', $1",
			expected: sanitize.Query{Parts: []sanitize.Part{"select '''', ", 1}},
		},
		{
			sql:      `select """", $1`,
			expected: sanitize.Query{Parts: []sanitize.Part{`select """", `, 1}},
		},
		{
			sql:      "select $1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11",
			expected: sanitize.Query{Parts: []sanitize.Part{"select ", 1, ", ", 2, ", ", 3, ", ", 4, ", ", 5, ", ", 6, ", ", 7, ", ", 8, ", ", 9, ", ", 10, ", ", 11}},
		},
		{
			sql:      `select "adsf""$1""adsf", $1, 'foo''$$12bar', $2, '$3'`,
			expected: sanitize.Query{Parts: []sanitize.Part{`select "adsf""$1""adsf", `, 1, `, 'foo''$$12bar', `, 2, `, '$3'`}},
		},
		{
			sql:      `select E'escape string\' $42', $1`,
			expected: sanitize.Query{Parts: []sanitize.Part{`select E'escape string\' $42', `, 1}},
		},
		{
			sql:      `select e'escape string\' $42', $1`,
			expected: sanitize.Query{Parts: []sanitize.Part{`select e'escape string\' $42', `, 1}},
		},
		{
			sql:      `select /* a baby's toy */ 'barbie', $1`,
			expected: sanitize.Query{Parts: []sanitize.Part{`select /* a baby's toy */ 'barbie', `, 1}},
		},
		{
			sql:      `select /* *_* */ $1`,
			expected: sanitize.Query{Parts: []sanitize.Part{`select /* *_* */ `, 1}},
		},
		{
			sql:      `select 42 /* /* /* 42 */ */ */, $1`,
			expected: sanitize.Query{Parts: []sanitize.Part{`select 42 /* /* /* 42 */ */ */, `, 1}},
		},
		{
			sql:      "select -- a baby's toy\n'barbie', $1",
			expected: sanitize.Query{Parts: []sanitize.Part{"select -- a baby's toy\n'barbie', ", 1}},
		},
		{
			sql:      "select 42 -- is a Deep Thought's favorite number",
			expected: sanitize.Query{Parts: []sanitize.Part{"select 42 -- is a Deep Thought's favorite number"}},
		},
		{
			sql:      "select 42, -- \\nis a Deep Thought's favorite number\n$1",
			expected: sanitize.Query{Parts: []sanitize.Part{"select 42, -- \\nis a Deep Thought's favorite number\n", 1}},
		},
		{
			sql:      "select 42, -- \\nis a Deep Thought's favorite number\r$1",
			expected: sanitize.Query{Parts: []sanitize.Part{"select 42, -- \\nis a Deep Thought's favorite number\r", 1}},
		},
		{
			// https://github.com/jackc/pgx/issues/1380
			sql:      "select 'hello w�rld'",
			expected: sanitize.Query{Parts: []sanitize.Part{"select 'hello w�rld'"}},
		},
		{
			// Unterminated quoted string
			sql:      "select 'hello world",
			expected: sanitize.Query{Parts: []sanitize.Part{"select 'hello world"}},
		},
	}

	for i, tt := range successTests {
		query, err := sanitize.NewQuery(tt.sql)
		if err != nil {
			t.Errorf("%d. %v", i, err)
		}

		if len(query.Parts) == len(tt.expected.Parts) {
			for j := range query.Parts {
				if query.Parts[j] != tt.expected.Parts[j] {
					t.Errorf("%d. expected part %d to be %v but it was %v", i, j, tt.expected.Parts[j], query.Parts[j])
				}
			}
		} else {
			t.Errorf("%d. expected query parts to be %v but it was %v", i, tt.expected.Parts, query.Parts)
		}
	}
}

func TestQuerySanitize(t *testing.T) {
	successfulTests := []struct {
		query    sanitize.Query
		args     []any
		expected string
	}{
		{
			query:    sanitize.Query{Parts: []sanitize.Part{"select 42"}},
			args:     []any{},
			expected: `select 42`,
		},
		{
			query:    sanitize.Query{Parts: []sanitize.Part{"select ", 1}},
			args:     []any{int64(42)},
			expected: `select  42 `,
		},
		{
			query:    sanitize.Query{Parts: []sanitize.Part{"select ", 1}},
			args:     []any{float64(1.23)},
			expected: `select  1.23 `,
		},
		{
			query:    sanitize.Query{Parts: []sanitize.Part{"select ", 1}},
			args:     []any{true},
			expected: `select  true `,
		},
		{
			query:    sanitize.Query{Parts: []sanitize.Part{"select ", 1}},
			args:     []any{[]byte{0, 1, 2, 3, 255}},
			expected: `select  '\x00010203ff' `,
		},
		{
			query:    sanitize.Query{Parts: []sanitize.Part{"select ", 1}},
			args:     []any{nil},
			expected: `select  null `,
		},
		{
			query:    sanitize.Query{Parts: []sanitize.Part{"select ", 1}},
			args:     []any{"foobar"},
			expected: `select  'foobar' `,
		},
		{
			query:    sanitize.Query{Parts: []sanitize.Part{"select ", 1}},
			args:     []any{"foo'bar"},
			expected: `select  'foo''bar' `,
		},
		{
			query:    sanitize.Query{Parts: []sanitize.Part{"select ", 1}},
			args:     []any{`foo\'bar`},
			expected: `select  'foo\''bar' `,
		},
		{
			query:    sanitize.Query{Parts: []sanitize.Part{"insert ", 1}},
			args:     []any{time.Date(2020, time.March, 1, 23, 59, 59, 999999999, time.UTC)},
			expected: `insert  '2020-03-01 23:59:59.999999Z' `,
		},
		{
			query:    sanitize.Query{Parts: []sanitize.Part{"select 1-", 1}},
			args:     []any{int64(-1)},
			expected: `select 1- -1 `,
		},
		{
			query:    sanitize.Query{Parts: []sanitize.Part{"select 1-", 1}},
			args:     []any{float64(-1)},
			expected: `select 1- -1 `,
		},
	}

	for i, tt := range successfulTests {
		actual, err := tt.query.Sanitize(tt.args...)
		if err != nil {
			t.Errorf("%d. %v", i, err)
			continue
		}

		if tt.expected != actual {
			t.Errorf("%d. expected %s, but got %s", i, tt.expected, actual)
		}
	}

	errorTests := []struct {
		query    sanitize.Query
		args     []any
		expected string
	}{
		{
			query:    sanitize.Query{Parts: []sanitize.Part{"select ", 1, ", ", 2}},
			args:     []any{int64(42)},
			expected: `insufficient arguments`,
		},
		{
			query:    sanitize.Query{Parts: []sanitize.Part{"select 'foo'"}},
			args:     []any{int64(42)},
			expected: `unused argument: 0`,
		},
		{
			query:    sanitize.Query{Parts: []sanitize.Part{"select ", 1}},
			args:     []any{42},
			expected: `invalid arg type: int`,
		},
	}

	for i, tt := range errorTests {
		_, err := tt.query.Sanitize(tt.args...)
		if err == nil || err.Error() != tt.expected {
			t.Errorf("%d. expected error %v, got %v", i, tt.expected, err)
		}
	}
}