package tokenize_test

import (
	"fmt"
	"testing"

	"git.makaay.nl/mauricem/go-parsekit/tokenize"
)

func TestSyntacticSugar(t *testing.T) {
	var a = tokenize.A
	AssertHandlers(t, []HandlerT{
		{"aaaaaa", a.Rune('a').Times(4), true, "aaaa"},
		{"ababab", a.Rune('a').Or(a.Rune('b')).Times(4), true, "abab"},
		{"ababab", a.Rune('a').Then(a.Rune('b')), true, "ab"},
		{"bababa", a.Rune('a').Then(a.Rune('b')), false, ""},
		{"cccccc", a.Rune('c').Optional(), true, "c"},
		{"dddddd", a.Rune('c').Optional(), true, ""},
		{"a,b ,c, d|", a.ASCII.SeparatedBy(a.Space.Optional().Then(a.Comma).Then(a.Space.Optional())), true, "a,b ,c, d"},
	})
}

func ExampleHandler_Times() {
	c, a := tokenize.C, tokenize.A
	phoneNumber := c.Seq(a.Rune('0'), a.Digit.Times(9))

	fmt.Println(phoneNumber.Match("0201234567"))
	// Output:
	// 0201234567 <nil>
}

func ExampleHandler_Then() {
	c, a := tokenize.C, tokenize.A
	phoneNumber := a.Rune('0').Then(c.Rep(9, a.Digit))

	fmt.Println(phoneNumber.Match("0208888888"))
	// Output:
	// 0208888888 <nil>
}

func ExampleHandler_Or() {
	c, a := tokenize.C, tokenize.A
	phoneNumber := c.Seq(a.Str("00").Or(a.Plus), a.Str("31"), a.DigitNotZero, c.Rep(8, a.Digit))

	fmt.Println(phoneNumber.Match("+31209876543"))
	fmt.Println(phoneNumber.Match("0031209876543"))
	fmt.Println(phoneNumber.Match("0031020991234"))
	fmt.Println(phoneNumber.Match("0031201234"))
	// Output:
	// +31209876543 <nil>
	// 0031209876543 <nil>
	// <nil> mismatch at start of file
	// <nil> mismatch at start of file
}

func ExampleHandler_SeparatedBy() {
	a, t := tokenize.A, tokenize.T
	csv := t.Int("number", a.Digits).SeparatedBy(a.Comma)

	r, _ := csv.Match("123,456,7,8,9")
	for i, token := range r.Tokens() {
		fmt.Printf("[%d] %v\n", i, token)
	}
	// Output:
	// [0] number("123", value = (int)123)
	// [1] number("456", value = (int)456)
	// [2] number("7", value = (int)7)
	// [3] number("8", value = (int)8)
	// [4] number("9", value = (int)9)
}

func ExampleHandler_Optional() {
	c, a := tokenize.C, tokenize.A

	spanish := c.Seq(
		a.Rune('¿').Optional(),
		c.OneOrMore(a.AnyRune.Except(a.Question)),
		a.Rune('?').Optional())

	fmt.Println(spanish.Match("¿Habla español María?"))
	fmt.Println(spanish.Match("Sí, María habla español."))
	// Output:
	// ¿Habla español María? <nil>
	// Sí, María habla español. <nil>
}

func ExampleHandler_Match() {
	r, err := tokenize.A.IPv4.Match("001.002.003.004")
	fmt.Println(r, err)

	r, err = tokenize.A.IPv4.Match("1.2.3")
	fmt.Println(r, err)

	// Output:
	// 1.2.3.4 <nil>
	// <nil> mismatch at start of file
}