package option

import (
	"testing"

	"gitp78su.ipnodns.ru/svi/kern/v4/d0/defs/def_spec_base"
)

type testerOption struct {
	t *testing.T
}

func TestOption(t *testing.T) {
	sf := &testerOption{
		t: t,
	}
	sf.create()
}

// Создаёт новый Result.
func (sf *testerOption) create() {
	sf.t.Log("create")
	sf.createSomeBad1()
	sf.createSomeGood1()
	sf.createSomeGood2()
	sf.createNoneGood1()
}

func (sf *testerOption) createNoneGood1() {
	sf.t.Log("createNoneGood1")
	defer func() {
		if _panic := recover(); _panic != nil {
			sf.t.Fatalf("createNoneGood1(): panic=%v", _panic)
		}
	}()
	opt := NewNone[def_spec_base.Txt]()
	if opt.IsSome() {
		sf.t.Fatalf("createNoneGood1(): is ok")
	}
	if !opt.IsNone() {
		sf.t.Fatalf("createNoneGood1(): not err")
	}
	if val := opt.SomeOr("test2"); val != "test2" {
		sf.t.Fatalf("createNoneGood1(): val bad")
	}
	if val := opt.SomeOr("test1"); val != "test1" {
		sf.t.Fatalf("createNoneGood1(): val bad")
	}
	if val := opt.SomeOrFn(sf.fnWrap2); val != "test5" {
		sf.t.Fatalf("createNoneGood1(): val bad")
	}
	sf.unwrapErr(opt)
	sf.hassert(opt)
	sf.assert(opt)
}

func (sf *testerOption) assert(res *Option[def_spec_base.Txt]) {
	sf.t.Log("assert")
	defer func() {
		if _panic := recover(); _panic == nil {
			sf.t.Fatalf("assert(): panic==nil")
		}
	}()
	res.Hassert(testAssert)
}

const testAssert = def_spec_base.Txt("test assert")

func (sf *testerOption) hassert(res *Option[def_spec_base.Txt]) {
	sf.t.Log("hassert")
	defer func() {
		if _panic := recover(); _panic == nil {
			sf.t.Fatalf("hassert(): panic==nil")
		}
	}()
	res.Hassert(testAssert)
}

func (sf *testerOption) unwrapErr(res *Option[def_spec_base.Txt]) {
	sf.t.Log("unwrapErr")
	defer func() {
		if _panic := recover(); _panic == nil {
			sf.t.Fatalf("unwrapErr(): panic==nil")
		}
	}()
	_ = res.Some()
}

var (
	str = def_spec_base.Txt("test val")
)

func (sf *testerOption) createSomeGood2() {
	sf.t.Log("createSomeGood2")
	defer func() {
		if _panic := recover(); _panic != nil {
			sf.t.Fatalf("createSomeGood2(): panic=%v", _panic)
		}
	}()
	opt := NewSome(str)
	if !opt.IsSome() {
		sf.t.Fatalf("createSomeGood2(): not ok")
	}
	if opt.IsNone() {
		sf.t.Fatalf("createSomeGood2(): is err")
	}
	if val := opt.Some(); val != str {
		sf.t.Fatalf("createSomeGood2(): val bad")
	}
	txtTest1 := def_spec_base.Txt("test1")
	if val := opt.SomeOr(txtTest1); val != str {
		sf.t.Fatalf("createSomeGood2(): val bad")
	}
	if val := opt.SomeOr(txtTest1); val != "str" {
		sf.t.Fatalf("createSomeGood2(): val bad")
	}
	if val := opt.SomeOrFn(sf.fnWrap); val != str {
		sf.t.Fatalf("createSomeGood2(): val bad")
	}
	opt.Hassert(txtTest)
	opt.Assert(txtTest)
}

const txtTest = def_spec_base.Txt("test")

// Функция высшего порядка для замещения ошибки.
func (sf *testerOption) fnWrap2() def_spec_base.Txt {
	return "test5"
}

// Функция высшего порядка для замещения ошибки.
func (sf *testerOption) fnWrap() def_spec_base.Txt {
	return "test1"
}

func (sf *testerOption) createSomeGood1() {
	sf.t.Log("createSomeGood1")
	defer func() {
		if _panic := recover(); _panic != nil {
			sf.t.Fatalf("createSomeGood1(): panic=%v", _panic)
		}
	}()
	str := "test val"
	_ = NewSome(&str)
}

// Нет результата.
func (sf *testerOption) createSomeBad1() {
	sf.t.Log("createSomeBad1")
	defer func() {
		if _panic := recover(); _panic == nil {
			sf.t.Fatalf("createSomeBad1(): panic==nil")
		}
	}()
	var str def_spec_base.Txt
	_ = NewSome(str)
}