package hugolib

import (
	"github.com/spf13/hugo/source"
	"reflect"
	"testing"
)

func TestGt(t *testing.T) {
	for i, this := range []struct {
		left          interface{}
		right         interface{}
		leftShouldWin bool
	}{
		{5, 8, false},
		{8, 5, true},
		{5, 5, false},
		{-2, 1, false},
		{2, -5, true},
		{0.0, 1.23, false},
		{1.23, 0.0, true},
		{"8", "5", true},
		{"5", "0001", true},
		{[]int{100, 99}, []int{1, 2, 3, 4}, false},
	} {
		leftIsBigger := Gt(this.left, this.right)
		if leftIsBigger != this.leftShouldWin {
			var which string
			if leftIsBigger {
				which = "expected right to be bigger, but left was"
			} else {
				which = "expected left to be bigger, but right was"
			}
			t.Errorf("[%d] %v compared to %v: %s", i, this.left, this.right, which)
		}
	}
}

func TestDoArithmetic(t *testing.T) {
	for i, this := range []struct {
		a      interface{}
		b      interface{}
		op     rune
		expect interface{}
	}{
		{3, 2, '+', int64(5)},
		{3, 2, '-', int64(1)},
		{3, 2, '*', int64(6)},
		{3, 2, '/', int64(1)},
		{3.0, 2, '+', float64(5)},
		{3.0, 2, '-', float64(1)},
		{3.0, 2, '*', float64(6)},
		{3.0, 2, '/', float64(1.5)},
		{3, 2.0, '+', float64(5)},
		{3, 2.0, '-', float64(1)},
		{3, 2.0, '*', float64(6)},
		{3, 2.0, '/', float64(1.5)},
		{3.0, 2.0, '+', float64(5)},
		{3.0, 2.0, '-', float64(1)},
		{3.0, 2.0, '*', float64(6)},
		{3.0, 2.0, '/', float64(1.5)},
		{uint(3), uint(2), '+', uint64(5)},
		{uint(3), uint(2), '-', uint64(1)},
		{uint(3), uint(2), '*', uint64(6)},
		{uint(3), uint(2), '/', uint64(1)},
		{uint(3), 2, '+', uint64(5)},
		{uint(3), 2, '-', uint64(1)},
		{uint(3), 2, '*', uint64(6)},
		{uint(3), 2, '/', uint64(1)},
		{3, uint(2), '+', uint64(5)},
		{3, uint(2), '-', uint64(1)},
		{3, uint(2), '*', uint64(6)},
		{3, uint(2), '/', uint64(1)},
		{uint(3), -2, '+', int64(1)},
		{uint(3), -2, '-', int64(5)},
		{uint(3), -2, '*', int64(-6)},
		{uint(3), -2, '/', int64(-1)},
		{-3, uint(2), '+', int64(-1)},
		{-3, uint(2), '-', int64(-5)},
		{-3, uint(2), '*', int64(-6)},
		{-3, uint(2), '/', int64(-1)},
		{uint(3), 2.0, '+', float64(5)},
		{uint(3), 2.0, '-', float64(1)},
		{uint(3), 2.0, '*', float64(6)},
		{uint(3), 2.0, '/', float64(1.5)},
		{3.0, uint(2), '+', float64(5)},
		{3.0, uint(2), '-', float64(1)},
		{3.0, uint(2), '*', float64(6)},
		{3.0, uint(2), '/', float64(1.5)},
		{0, 0, '+', 0},
		{0, 0, '-', 0},
		{0, 0, '*', 0},
		{"foo", "bar", '+', "foobar"},
		{3, 0, '/', false},
		{3.0, 0, '/', false},
		{3, 0.0, '/', false},
		{uint(3), uint(0), '/', false},
		{3, uint(0), '/', false},
		{-3, uint(0), '/', false},
		{uint(3), 0, '/', false},
		{3.0, uint(0), '/', false},
		{uint(3), 0.0, '/', false},
		{3, "foo", '+', false},
		{3.0, "foo", '+', false},
		{uint(3), "foo", '+', false},
		{"foo", 3, '+', false},
		{"foo", "bar", '-', false},
		{3, 2, '%', false},
	} {
		result, err := doArithmetic(this.a, this.b, this.op)
		if b, ok := this.expect.(bool); ok && !b {
			if err == nil {
				t.Errorf("[%d] doArithmetic didn't return an expected error")
			}
		} else {
			if err != nil {
				t.Errorf("[%d] failed: %s", i, err)
				continue
			}
			if !reflect.DeepEqual(result, this.expect) {
				t.Errorf("[%d] doArithmetic got %v but expected %v", i, result, this.expect)
			}
		}
	}
}

func TestMod(t *testing.T) {
	for i, this := range []struct {
		a      interface{}
		b      interface{}
		expect interface{}
	}{
		{3, 2, int64(1)},
		{3, 1, int64(0)},
		{3, 0, false},
		{0, 3, int64(0)},
		{3.1, 2, false},
		{3, 2.1, false},
		{3.1, 2.1, false},
		{int8(3), int8(2), int64(1)},
		{int16(3), int16(2), int64(1)},
		{int32(3), int32(2), int64(1)},
		{int64(3), int64(2), int64(1)},
	} {
		result, err := Mod(this.a, this.b)
		if b, ok := this.expect.(bool); ok && !b {
			if err == nil {
				t.Errorf("[%d] modulo didn't return an expected error")
			}
		} else {
			if err != nil {
				t.Errorf("[%d] failed: %s", i, err)
				continue
			}
			if !reflect.DeepEqual(result, this.expect) {
				t.Errorf("[%d] modulo got %v but expected %v", i, result, this.expect)
			}
		}
	}
}

func TestModBool(t *testing.T) {
	for i, this := range []struct {
		a      interface{}
		b      interface{}
		expect interface{}
	}{
		{3, 3, true},
		{3, 2, false},
		{3, 1, true},
		{3, 0, nil},
		{0, 3, true},
		{3.1, 2, nil},
		{3, 2.1, nil},
		{3.1, 2.1, nil},
		{int8(3), int8(3), true},
		{int8(3), int8(2), false},
		{int16(3), int16(3), true},
		{int16(3), int16(2), false},
		{int32(3), int32(3), true},
		{int32(3), int32(2), false},
		{int64(3), int64(3), true},
		{int64(3), int64(2), false},
	} {
		result, err := ModBool(this.a, this.b)
		if this.expect == nil {
			if err == nil {
				t.Errorf("[%d] modulo didn't return an expected error")
			}
		} else {
			if err != nil {
				t.Errorf("[%d] failed: %s", i, err)
				continue
			}
			if !reflect.DeepEqual(result, this.expect) {
				t.Errorf("[%d] modulo got %v but expected %v", i, result, this.expect)
			}
		}
	}
}

func TestFirst(t *testing.T) {
	for i, this := range []struct {
		count    interface{}
		sequence interface{}
		expect   interface{}
	}{
		{int(2), []string{"a", "b", "c"}, []string{"a", "b"}},
		{int32(3), []string{"a", "b"}, []string{"a", "b"}},
		{int64(2), []int{100, 200, 300}, []int{100, 200}},
		{100, []int{100, 200}, []int{100, 200}},
		{"1", []int{100, 200, 300}, []int{100}},
		{int64(-1), []int{100, 200, 300}, false},
		{"noint", []int{100, 200, 300}, false},
	} {
		results, err := First(this.count, this.sequence)
		if b, ok := this.expect.(bool); ok && !b {
			if err == nil {
				t.Errorf("[%d] First didn't return an expected error")
			}
		} else {
			if err != nil {
				t.Errorf("[%d] failed: %s", i, err)
				continue
			}
			if !reflect.DeepEqual(results, this.expect) {
				t.Errorf("[%d] First %d items, got %v but expected %v", i, this.count, results, this.expect)
			}
		}
	}
}

func TestIn(t *testing.T) {
	for i, this := range []struct {
		v1     interface{}
		v2     interface{}
		expect bool
	}{
		{[]string{"a", "b", "c"}, "b", true},
		{[]string{"a", "b", "c"}, "d", false},
		{[]string{"a", "12", "c"}, 12, false},
		{[]int{1, 2, 4}, 2, true},
		{[]int{1, 2, 4}, 3, false},
		{[]float64{1.23, 2.45, 4.67}, 1.23, true},
		{[]float64{1.234567, 2.45, 4.67}, 1.234568, false},
		{"this substring should be found", "substring", true},
		{"this substring should not be found", "subseastring", false},
	} {
		result := In(this.v1, this.v2)

		if result != this.expect {
			t.Errorf("[%d] Got %v but expected %v", i, result, this.expect)
		}
	}
}

func TestIntersect(t *testing.T) {
	for i, this := range []struct {
		sequence1 interface{}
		sequence2 interface{}
		expect    interface{}
	}{
		{[]string{"a", "b", "c"}, []string{"a", "b"}, []string{"a", "b"}},
		{[]string{"a", "b"}, []string{"a", "b", "c"}, []string{"a", "b"}},
		{[]string{"a", "b", "c"}, []string{"d", "e"}, []string{}},
		{[]string{}, []string{}, []string{}},
		{[]string{"a", "b"}, nil, make([]interface{}, 0)},
		{nil, []string{"a", "b"}, make([]interface{}, 0)},
		{nil, nil, make([]interface{}, 0)},
		{[]string{"1", "2"}, []int{1, 2}, []string{}},
		{[]int{1, 2}, []string{"1", "2"}, []int{}},
		{[]int{1, 2, 4}, []int{2, 4}, []int{2, 4}},
		{[]int{2, 4}, []int{1, 2, 4}, []int{2, 4}},
		{[]int{1, 2, 4}, []int{3, 6}, []int{}},
		{[]float64{2.2, 4.4}, []float64{1.1, 2.2, 4.4}, []float64{2.2, 4.4}},
	} {
		results, err := Intersect(this.sequence1, this.sequence2)
		if err != nil {
			t.Errorf("[%d] failed: %s", i, err)
			continue
		}
		if !reflect.DeepEqual(results, this.expect) {
			t.Errorf("[%d] Got %v but expected %v", i, results, this.expect)
		}
	}

	_, err1 := Intersect("not an array or slice", []string{"a"})

	if err1 == nil {
		t.Error("Excpected error for non array as first arg")
	}

	_, err2 := Intersect([]string{"a"}, "not an array or slice")

	if err2 == nil {
		t.Error("Excpected error for non array as second arg")
	}
}

func (x *TstX) TstRp() string {
	return "r" + x.A
}

func (x TstX) TstRv() string {
	return "r" + x.B
}

type TstX struct {
	A, B string
}

func TestWhere(t *testing.T) {

	page1 := &Page{contentType: "v", Source: Source{File: *source.NewFile("/x/y/z/source.md")}}
	page2 := &Page{contentType: "w", Source: Source{File: *source.NewFile("/y/z/a/source.md")}}

	for i, this := range []struct {
		sequence interface{}
		key      interface{}
		match    interface{}
		expect   interface{}
	}{
		{[]map[int]string{{1: "a", 2: "m"}, {1: "c", 2: "d"}, {1: "e", 3: "m"}}, 2, "m", []map[int]string{{1: "a", 2: "m"}}},
		{[]map[string]int{{"a": 1, "b": 2}, {"a": 3, "b": 4}, {"a": 5, "x": 4}}, "b", 4, []map[string]int{{"a": 3, "b": 4}}},
		{[]TstX{{"a", "b"}, {"c", "d"}, {"e", "f"}}, "B", "f", []TstX{{"e", "f"}}},
		{[]*map[int]string{&map[int]string{1: "a", 2: "m"}, &map[int]string{1: "c", 2: "d"}, &map[int]string{1: "e", 3: "m"}}, 2, "m", []*map[int]string{&map[int]string{1: "a", 2: "m"}}},
		{[]*TstX{&TstX{"a", "b"}, &TstX{"c", "d"}, &TstX{"e", "f"}}, "B", "f", []*TstX{&TstX{"e", "f"}}},
		{[]*TstX{&TstX{"a", "b"}, &TstX{"c", "d"}, &TstX{"e", "c"}}, "TstRp", "rc", []*TstX{&TstX{"c", "d"}}},
		{[]TstX{TstX{"a", "b"}, TstX{"c", "d"}, TstX{"e", "c"}}, "TstRv", "rc", []TstX{TstX{"e", "c"}}},
		{[]*Page{page1, page2}, "Type", "v", []*Page{page1}},
		{[]*Page{page1, page2}, "Section", "y", []*Page{page2}},
	} {
		results, err := Where(this.sequence, this.key, this.match)
		if err != nil {
			t.Errorf("[%d] failed: %s", i, err)
			continue
		}
		if !reflect.DeepEqual(results, this.expect) {
			t.Errorf("[%d] Where clause matching %v with %v, got %v but expected %v", i, this.key, this.match, results, this.expect)
		}
	}
}