debug

var (
	B = literal.B
	F = literal.F
	I = literal.I
	T = literal.T

	CmdError    = assign.CmdError
	CmdErrorCtx = assign.CmdErrorCtx
)

var Blob []byte

var FactorialCheck = []rt.Execute{
	&debug.Expect{
		Value: &core.CompareNum{
			A: F(6), Is: core.C_Comparison_EqualTo, B: &assign.CallPattern{
				PatternName: "factorial",
				Arguments: []assign.Arg{{
					Name:  "num",
					Value: &assign.FromNumber{Value: F(3)},
				}}},
		},
	},
}

var FactorialDecreaseRule = []rt.Execute{
	&core.ChooseBranch{
		If: &core.CompareNum{
			Markup: UserComment("above zero, subtract one"),
			A:      core.Variable("num"),
			Is:     core.C_Comparison_GreaterThan,
			B:      F(0)},
		Exe: FactorialMulMinusOne,
	},
}

var FactorialDefaultRule = []rt.Execute{
	&assign.SetValue{
		Markup: UserComment("by default, return one"),
		Target: core.Variable("num"),
		Value:  &assign.FromNumber{Value: I(1)},
	},
}

var FactorialJs string

var FactorialMulMinusOne = []rt.Execute{
	&assign.SetValue{
		Target: core.Variable("num"),
		Value: &assign.FromNumber{Value: &core.MultiplyValue{
			A: core.Variable("num"),
			B: &core.SubtractValue{
				A: core.Variable("num"),
				B: I(1),
			},
		}}},
}

var FactorialStory = story.StoryFile{
	Statements: []story.StoryStatement{
		&story.DefineTest{
			TestName: "factorial",
			Exe:      FactorialCheck,
		},
		&story.DefinePattern{
			PatternName: T("factorial"),
			Requires: []story.FieldDefinition{
				&story.NumberField{
					Markup: UserComment("just one argument, a number called 'num'"),
					Name:   T("num"),
				}},
			Provides: []story.FieldDefinition{&story.NumberField{
				Markup: UserComment("the result uses the same variable as the pattern input does"),
				Name:   T("num"),
			}},
			Exe: FactorialDefaultRule,
		},
		&story.RuleForPattern{
			PatternName: T("factorial"),
			Exe:         FactorialDecreaseRule,
		}},
}

var SayPattern = testpat.Pattern{
	Name:   "say me",
	Labels: []string{"num"},
	Fields: []rt.Field{
		{Name: "num", Affinity: "number", Type: ""},
	},
	Rules: []rt.Rule{{
		Name: "default", Exe: SayIt("Not between 1 and 3."),
	}, {
		Name: "3b", Exe: []rt.Execute{&core.ChooseBranch{
			If: &MatchNumber{3}, Exe: SayIt("San!")},
		},
	}, {
		Name: "3a", Exe: []rt.Execute{&core.ChooseBranch{
			If: &MatchNumber{3}, Exe: SayIt("Three!")},
		},
	}, {
		Name: "2", Exe: []rt.Execute{&core.ChooseBranch{
			If: &MatchNumber{2}, Exe: SayIt("Two!")},
		},
	}, {
		Name: "1", Exe: []rt.Execute{&core.ChooseBranch{
			If: &MatchNumber{1}, Exe: SayIt("One!")},
		},
	}},
}