// Copyright (c) 2024 Celestino Amoroso (celestino.amoroso@gmail.com).
// All rights reserved.

// funcs_test.go
package expr

import (
	"errors"
	"testing"
)

func TestFuncs(t *testing.T) {
	inputs := []inputType{
		/*   1 */ {`isNil(nil)`, true, nil},
		/*   2 */ {`v=nil; isNil(v)`, true, nil},
		/*   3 */ {`v=5; isNil(v)`, false, nil},
		/*   4 */ {`int(true)`, int64(1), nil},
		/*   5 */ {`int(false)`, int64(0), nil},
		/*   6 */ {`int(3.1)`, int64(3), nil},
		/*   7 */ {`int(3.9)`, int64(3), nil},
		/*   8 */ {`int("432")`, int64(432), nil},
		/*   9 */ {`int("1.5")`, nil, errors.New(`strconv.Atoi: parsing "1.5": invalid syntax`)},
		/*  10 */ {`int("432", 4)`, nil, errors.New(`too much params -- expected 1, got 2`)},
		/*  11 */ {`int(nil)`, nil, errors.New(`int() can't convert <nil> to int`)},
		/*  12 */ {`two=func(){2}; two()`, int64(2), nil},
		/*  13 */ {`double=func(x) {2*x}; (double(3))`, int64(6), nil},
		/*  14 */ {`double=func(x){2*x}; double(3)`, int64(6), nil},
		/*  15 */ {`double=func(x){2*x}; a=5; double(3+a) + 1`, int64(17), nil},
		/*  16 */ {`double=func(x){2*x}; a=5; two=func() {2}; (double(3+a) + 1) * two()`, int64(34), nil},
		/*  17 */ {`builtin "import"; import("./test-funcs.expr"); (double(3+a) + 1) * two()`, int64(34), nil},
		/*  18 */ {`builtin "import"; import("test-funcs.expr"); (double(3+a) + 1) * two()`, int64(34), nil},
		/*  19 */ {`@x="hello"; @x`, nil, errors.New(`[1:3] variable references are not allowed in top level expressions: "@x"`)},
		/*  20 */ {`f=func(){@x="hello"}; f(); x`, "hello", nil},
		/*  21 */ {`f=func(@y){@y=@y+1}; f(2); y`, int64(3), nil},
		/*  22 */ {`f=func(@y){g=func(){@x=5}; @y=@y+g()}; f(2); y+x`, nil, errors.New(`undefined variable or function "x"`)},
		/*  23 */ {`f=func(@y){g=func(){@x=5}; @z=g(); @y=@y+@z}; f(2); y+z`, int64(12), nil},
		/*  24 */ {`f=func(@y){g=func(){@x=5}; g(); @z=x; @y=@y+@z}; f(2); y+z`, int64(12), nil},
		/*  25 */ {`f=func(@y){g=func(){@x=5}; g(); @z=x; @x=@y+@z}; f(2); y+x`, int64(9), nil},
		/*  26 */ {`builtin "import"; importAll("./test-funcs.expr"); six()`, int64(6), nil},
		/*  27 */ {`builtin "import"; import("./sample-export-all.expr"); six()`, int64(6), nil},
		/*  28 */ {`builtin "string"; joinStr("-", "one", "two", "three")`, "one-two-three", nil},
		/*  29 */ {`builtin "string"; joinStr("-", ["one", "two", "three"])`, "one-two-three", nil},
		/*  30 */ {`builtin "string"; ls= ["one", "two", "three"]; joinStr("-", ls)`, "one-two-three", nil},
		/*  31 */ {`builtin "string"; ls= ["one", "two", "three"]; joinStr(1, ls)`, nil, errors.New(`joinStr() the "separator" parameter must be a string, got a int64 (1)`)},
		/*  32 */ {`builtin "string"; ls= ["one", 2, "three"]; joinStr("-", ls)`, nil, errors.New(`joinStr() expected string, got int64 (2)`)},
		/*  33 */ {`builtin "string"; "<"+trimStr("  bye bye  ")+">"`, "<bye bye>", nil},
		/*  34 */ {`builtin "string"; subStr("0123456789", 1,2)`, "12", nil},
		/*  35 */ {`builtin "string"; subStr("0123456789", -3,2)`, "78", nil},
		/*  36 */ {`builtin "string"; subStr("0123456789", -3)`, "789", nil},
		/*  37 */ {`builtin "string"; subStr("0123456789")`, "0123456789", nil},
		/*  38 */ {`builtin "string"; startsWithStr("0123456789", "xyz", "012")`, true, nil},
		/*  39 */ {`builtin "string"; startsWithStr("0123456789", "xyz", "0125")`, false, nil},
		/*  40 */ {`builtin "string"; startsWithStr("0123456789")`, nil, errors.New(`too few params -- expected 2 or more, got 1`)},
		/*  41 */ {`builtin "string"; endsWithStr("0123456789", "xyz", "789")`, true, nil},
		/*  42 */ {`builtin "string"; endsWithStr("0123456789", "xyz", "0125")`, false, nil},
		/*  43 */ {`builtin "string"; endsWithStr("0123456789")`, nil, errors.New(`too few params -- expected 2 or more, got 1`)},
		/*  44 */ {`builtin "string"; splitStr("one-two-three", "-", )`, newListA("one", "two", "three"), nil},
		/*  45 */ {`isInt(2+1)`, true, nil},
		/*  46 */ {`isInt(3.1)`, false, nil},
		/*  47 */ {`isFloat(3.1)`, true, nil},
		/*  48 */ {`isString("3.1")`, true, nil},
		/*  49 */ {`isString("3" + 1)`, true, nil},
		/*  50 */ {`isList(["3",  1])`, true, nil},
		/*  51 */ {`isDict({"a":"3",  "b":1})`, true, nil},
		/*  52 */ {`isFract(1|3)`, true, nil},
		/*  53 */ {`isFract(3|1)`, false, nil},
		/*  54 */ {`isRational(3|1)`, true, nil},
		/*  55 */ {`builtin "math.arith"; add(1,2)`, int64(3), nil},
	}

	t.Setenv("EXPR_PATH", ".")

	//parserTest(t, "Func", inputs[54:55])
	parserTest(t, "Func", inputs)
}