package sjson

import (
	"encoding/hex"
	"fmt"
	"math/rand"
	"testing"
	"time"

	"github.com/tidwall/gjson"
)

func TestInvalidPaths(t *testing.T) {
	var err error
	_, err = SetRaw(`{"hello":"world"}`, "", `"planet"`)
	if err == nil || err.Error() != "path cannot be empty" {
		t.Fatalf("expecting '%v', got '%v'", "path cannot be empty", err)
	}
	_, err = SetRaw("", "name.last.#", "")
	if err == nil || err.Error() != "array access character not allowed in path" {
		t.Fatalf("expecting '%v', got '%v'", "array access character not allowed in path", err)
	}
	_, err = SetRaw("", "name.last.\\1#", "")
	if err == nil || err.Error() != "array access character not allowed in path" {
		t.Fatalf("expecting '%v', got '%v'", "array access character not allowed in path", err)
	}
	_, err = SetRaw("", "name.las?t", "")
	if err == nil || err.Error() != "wildcard characters not allowed in path" {
		t.Fatalf("expecting '%v', got '%v'", "wildcard characters not allowed in path", err)
	}
	_, err = SetRaw("", "name.la\\s?t", "")
	if err == nil || err.Error() != "wildcard characters not allowed in path" {
		t.Fatalf("expecting '%v', got '%v'", "wildcard characters not allowed in path", err)
	}
	_, err = SetRaw("", "name.las*t", "")
	if err == nil || err.Error() != "wildcard characters not allowed in path" {
		t.Fatalf("expecting '%v', got '%v'", "wildcard characters not allowed in path", err)
	}
	_, err = SetRaw("", "name.las\\a*t", "")
	if err == nil || err.Error() != "wildcard characters not allowed in path" {
		t.Fatalf("expecting '%v', got '%v'", "wildcard characters not allowed in path", err)
	}
}

const (
	setRaw    = 1
	setBool   = 2
	setInt    = 3
	setFloat  = 4
	setString = 5
	setDelete = 6
)

func testRaw(t *testing.T, kind int, expect, json, path string, value interface{}) {
	var json2 string
	var err error
	switch kind {
	default:
		json2, err = Set(json, path, value)
	case setRaw:
		json2, err = SetRaw(json, path, value.(string))
	case setDelete:
		json2, err = Delete(json, path)
	}
	if err != nil {
		t.Fatal(err)
	} else if json2 != expect {
		t.Fatalf("expected '%v', got '%v'", expect, json2)
	}

	var json3 []byte
	switch kind {
	default:
		json3, err = SetBytes([]byte(json), path, value)
	case setRaw:
		json3, err = SetRawBytes([]byte(json), path, []byte(value.(string)))
	case setDelete:
		json3, err = DeleteBytes([]byte(json), path)
	}
	if err != nil {
		t.Fatal(err)
	} else if string(json3) != expect {
		t.Fatalf("expected '%v', got '%v'", expect, string(json3))
	}
}
func TestBasic(t *testing.T) {
	testRaw(t, setRaw, `[{"hiw":"planet","hi":"world"}]`, `[{"hi":"world"}]`, "0.hiw", `"planet"`)
	testRaw(t, setRaw, `[true]`, ``, "0", `true`)
	testRaw(t, setRaw, `[null,true]`, ``, "1", `true`)
	testRaw(t, setRaw, `[1,null,true]`, `[1]`, "2", `true`)
	testRaw(t, setRaw, `[1,true,false]`, `[1,null,false]`, "1", `true`)
	testRaw(t, setRaw,
		`[1,{"hello":"when","this":[0,null,2]},false]`,
		`[1,{"hello":"when","this":[0,1,2]},false]`,
		"1.this.1", `null`)
	testRaw(t, setRaw,
		`{"a":1,"b":{"hello":"when","this":[0,null,2]},"c":false}`,
		`{"a":1,"b":{"hello":"when","this":[0,1,2]},"c":false}`,
		"b.this.1", `null`)
	testRaw(t, setRaw,
		`{"a":1,"b":{"hello":"when","this":[0,null,2,null,4]},"c":false}`,
		`{"a":1,"b":{"hello":"when","this":[0,null,2]},"c":false}`,
		"b.this.4", `4`)
	testRaw(t, setRaw,
		`{"b":{"this":[null,null,null,null,4]}}`,
		``,
		"b.this.4", `4`)
	testRaw(t, setRaw,
		`[null,{"this":[null,null,null,null,4]}]`,
		``,
		"1.this.4", `4`)
	testRaw(t, setRaw,
		`{"1":{"this":[null,null,null,null,4]}}`,
		``,
		":1.this.4", `4`)
	testRaw(t, setRaw,
		`{":1":{"this":[null,null,null,null,4]}}`,
		``,
		"\\:1.this.4", `4`)
	testRaw(t, setRaw,
		`{":\1":{"this":[null,null,null,null,{".HI":4}]}}`,
		``,
		"\\:\\\\1.this.4.\\.HI", `4`)
	testRaw(t, setRaw,
		`{"app.token":"cde"}`,
		`{"app.token":"abc"}`,
		"app\\.token", `"cde"`)
	testRaw(t, setRaw,
		`{"b":{"this":{"😇":""}}}`,
		``,
		"b.this.😇", `""`)
	testRaw(t, setRaw,
		`[ 1,2  ,3]`,
		`  [ 1,2  ] `,
		"-1", `3`)
	testRaw(t, setInt, `[1234]`, ``, `0`, int64(1234))
	testRaw(t, setFloat, `[1234.5]`, ``, `0`, float64(1234.5))
	testRaw(t, setString, `["1234.5"]`, ``, `0`, "1234.5")
	testRaw(t, setBool, `[true]`, ``, `0`, true)
	testRaw(t, setBool, `[null]`, ``, `0`, nil)
	testRaw(t, setString, `{"arr":[1]}`, ``, `arr.-1`, 1)
}

func TestDelete(t *testing.T) {
	testRaw(t, setDelete, `[456]`, `[123,456]`, `0`, nil)
	testRaw(t, setDelete, `[123,789]`, `[123,456,789]`, `1`, nil)
	testRaw(t, setDelete, `[123,456]`, `[123,456,789]`, `-1`, nil)
	testRaw(t, setDelete, `{"a":[123,456]}`, `{"a":[123,456,789]}`, `a.-1`, nil)
	testRaw(t, setDelete, `{"and":"another"}`, `{"this":"that","and":"another"}`, `this`, nil)
	testRaw(t, setDelete, `{"this":"that"}`, `{"this":"that","and":"another"}`, `and`, nil)
	testRaw(t, setDelete, `{}`, `{"and":"another"}`, `and`, nil)
	testRaw(t, setDelete, `{"1":"2"}`, `{"1":"2"}`, `3`, nil)
}

// TestRandomData is a fuzzing test that throws random data at SetRaw
// function looking for panics.
func TestRandomData(t *testing.T) {
	var lstr string
	defer func() {
		if v := recover(); v != nil {
			println("'" + hex.EncodeToString([]byte(lstr)) + "'")
			println("'" + lstr + "'")
			panic(v)
		}
	}()
	rand.Seed(time.Now().UnixNano())
	b := make([]byte, 200)
	for i := 0; i < 2000000; i++ {
		n, err := rand.Read(b[:rand.Int()%len(b)])
		if err != nil {
			t.Fatal(err)
		}
		lstr = string(b[:n])
		SetRaw(lstr, "zzzz.zzzz.zzzz", "123")
	}
}

func TestDeleteIssue21(t *testing.T) {
	json := `{"country_code_from":"NZ","country_code_to":"SA","date_created":"2018-09-13T02:56:11.25783Z","date_updated":"2018-09-14T03:15:16.67356Z","disabled":false,"last_edited_by":"Developers","id":"a3e...bc454","merchant_id":"f2b...b91abf","signed_date":"2018-02-01T00:00:00Z","start_date":"2018-03-01T00:00:00Z","url":"https://www.google.com"}`
	res1 := gjson.Get(json, "date_updated")
	var err error
	json, err = Delete(json, "date_updated")
	if err != nil {
		t.Fatal(err)
	}
	res2 := gjson.Get(json, "date_updated")
	res3 := gjson.Get(json, "date_created")
	if !res1.Exists() || res2.Exists() || !res3.Exists() {
		t.Fatal("bad news")
	}

	// We change the number of characters in this to make the section of the string before the section that we want to delete a certain length

	//---------------------------
	lenBeforeToDeleteIs307AsBytes := `{"1":"","0":"012345678901234567890123456789012345678901234567890123456789012345678901234567","to_delete":"0","2":""}`

	expectedForLenBefore307AsBytes := `{"1":"","0":"012345678901234567890123456789012345678901234567890123456789012345678901234567","2":""}`
	//---------------------------

	//---------------------------
	lenBeforeToDeleteIs308AsBytes := `{"1":"","0":"0123456789012345678901234567890123456789012345678901234567890123456789012345678","to_delete":"0","2":""}`

	expectedForLenBefore308AsBytes := `{"1":"","0":"0123456789012345678901234567890123456789012345678901234567890123456789012345678","2":""}`
	//---------------------------

	//---------------------------
	lenBeforeToDeleteIs309AsBytes := `{"1":"","0":"01234567890123456789012345678901234567890123456789012345678901234567890123456","to_delete":"0","2":""}`

	expectedForLenBefore309AsBytes := `{"1":"","0":"01234567890123456789012345678901234567890123456789012345678901234567890123456","2":""}`
	//---------------------------

	var data = []struct {
		desc     string
		input    string
		expected string
	}{
		{
			desc:     "len before \"to_delete\"... = 307",
			input:    lenBeforeToDeleteIs307AsBytes,
			expected: expectedForLenBefore307AsBytes,
		},
		{
			desc:     "len before \"to_delete\"... = 308",
			input:    lenBeforeToDeleteIs308AsBytes,
			expected: expectedForLenBefore308AsBytes,
		},
		{
			desc:     "len before \"to_delete\"... = 309",
			input:    lenBeforeToDeleteIs309AsBytes,
			expected: expectedForLenBefore309AsBytes,
		},
	}

	for i, d := range data {
		result, err := Delete(d.input, "to_delete")

		if err != nil {
			t.Error(fmtErrorf(testError{
				unexpected: "error",
				desc:       d.desc,
				i:          i,
				lenInput:   len(d.input),
				input:      d.input,
				expected:   d.expected,
				result:     result,
			}))
		}
		if result != d.expected {
			t.Error(fmtErrorf(testError{
				unexpected: "result",
				desc:       d.desc,
				i:          i,
				lenInput:   len(d.input),
				input:      d.input,
				expected:   d.expected,
				result:     result,
			}))
		}
	}
}

type testError struct {
	unexpected string
	desc       string
	i          int
	lenInput   int
	input      interface{}
	expected   interface{}
	result     interface{}
}

func fmtErrorf(e testError) string {
	return fmt.Sprintf(
		"Unexpected %s:\n\t"+
			"for=%q\n\t"+
			"i=%d\n\t"+
			"len(input)=%d\n\t"+
			"input=%v\n\t"+
			"expected=%v\n\t"+
			"result=%v",
		e.unexpected, e.desc, e.i, e.lenInput, e.input, e.expected, e.result,
	)
}

func TestSetDotKeyIssue10(t *testing.T) {
	json := `{"app.token":"abc"}`
	json, _ = Set(json, `app\.token`, "cde")
	if json != `{"app.token":"cde"}` {
		t.Fatalf("expected '%v', got '%v'", `{"app.token":"cde"}`, json)
	}
}
func TestDeleteDotKeyIssue19(t *testing.T) {
	json := []byte(`{"data":{"key1":"value1","key2.something":"value2"}}`)
	json, _ = DeleteBytes(json, `data.key2\.something`)
	if string(json) != `{"data":{"key1":"value1"}}` {
		t.Fatalf("expected '%v', got '%v'", `{"data":{"key1":"value1"}}`, json)
	}
}