package fzf

import (

"reflect"
"testing"

"github.com/junegunn/fzf/src/algo"
"github.com/junegunn/fzf/src/util"

)

var slab *util.Slab

func init() {

slab = util.MakeSlab(slab16Size, slab32Size)

}

func TestParseTermsExtended(t *testing.T) {

terms := parseTerms(true, CaseSmart, false,
        "aaa 'bbb ^ccc ddd$ !eee !'fff !^ggg !hhh$ | ^iii$ ^xxx | 'yyy | zzz$ | !ZZZ |")
if len(terms) != 9 ||
        terms[0][0].typ != termFuzzy || terms[0][0].inv ||
        terms[1][0].typ != termExact || terms[1][0].inv ||
        terms[2][0].typ != termPrefix || terms[2][0].inv ||
        terms[3][0].typ != termSuffix || terms[3][0].inv ||
        terms[4][0].typ != termExact || !terms[4][0].inv ||
        terms[5][0].typ != termFuzzy || !terms[5][0].inv ||
        terms[6][0].typ != termPrefix || !terms[6][0].inv ||
        terms[7][0].typ != termSuffix || !terms[7][0].inv ||
        terms[7][1].typ != termEqual || terms[7][1].inv ||
        terms[8][0].typ != termPrefix || terms[8][0].inv ||
        terms[8][1].typ != termExact || terms[8][1].inv ||
        terms[8][2].typ != termSuffix || terms[8][2].inv ||
        terms[8][3].typ != termExact || !terms[8][3].inv {
        t.Errorf("%v", terms)
}
for _, termSet := range terms[:8] {
        term := termSet[0]
        if len(term.text) != 3 {
                t.Errorf("%v", term)
        }
}

}

func TestParseTermsExtendedExact(t *testing.T) {

terms := parseTerms(false, CaseSmart, false,
        "aaa 'bbb ^ccc ddd$ !eee !'fff !^ggg !hhh$")
if len(terms) != 8 ||
        terms[0][0].typ != termExact || terms[0][0].inv || len(terms[0][0].text) != 3 ||
        terms[1][0].typ != termFuzzy || terms[1][0].inv || len(terms[1][0].text) != 3 ||
        terms[2][0].typ != termPrefix || terms[2][0].inv || len(terms[2][0].text) != 3 ||
        terms[3][0].typ != termSuffix || terms[3][0].inv || len(terms[3][0].text) != 3 ||
        terms[4][0].typ != termExact || !terms[4][0].inv || len(terms[4][0].text) != 3 ||
        terms[5][0].typ != termFuzzy || !terms[5][0].inv || len(terms[5][0].text) != 3 ||
        terms[6][0].typ != termPrefix || !terms[6][0].inv || len(terms[6][0].text) != 3 ||
        terms[7][0].typ != termSuffix || !terms[7][0].inv || len(terms[7][0].text) != 3 {
        t.Errorf("%v", terms)
}

}

func TestParseTermsEmpty(t *testing.T) {

terms := parseTerms(true, CaseSmart, false, "' ^ !' !^")
if len(terms) != 0 {
        t.Errorf("%v", terms)
}

}

func TestExact(t *testing.T) {

defer clearPatternCache()
clearPatternCache()
pattern := BuildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, false, true, true,
        []Range{}, Delimiter{}, []rune("'abc"))
chars := util.ToChars([]byte("aabbcc abc"))
res, pos := algo.ExactMatchNaive(
        pattern.caseSensitive, pattern.normalize, pattern.forward, &chars, pattern.termSets[0][0].text, true, nil)
if res.Start != 7 || res.End != 10 {
        t.Errorf("%v / %d / %d", pattern.termSets, res.Start, res.End)
}
if pos != nil {
        t.Errorf("pos is expected to be nil")
}

}

func TestEqual(t *testing.T) {

defer clearPatternCache()
clearPatternCache()
pattern := BuildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, false, true, true, []Range{}, Delimiter{}, []rune("^AbC$"))

match := func(str string, sidxExpected int, eidxExpected int) {
        chars := util.ToChars([]byte(str))
        res, pos := algo.EqualMatch(
                pattern.caseSensitive, pattern.normalize, pattern.forward, &chars, pattern.termSets[0][0].text, true, nil)
        if res.Start != sidxExpected || res.End != eidxExpected {
                t.Errorf("%v / %d / %d", pattern.termSets, res.Start, res.End)
        }
        if pos != nil {
                t.Errorf("pos is expected to be nil")
        }
}
match("ABC", -1, -1)
match("AbC", 0, 3)
match("AbC  ", 0, 3)
match(" AbC ", 1, 4)
match("  AbC", 2, 5)

}

func TestCaseSensitivity(t *testing.T) {

defer clearPatternCache()
clearPatternCache()
pat1 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseSmart, false, true, true, []Range{}, Delimiter{}, []rune("abc"))
clearPatternCache()
pat2 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseSmart, false, true, true, []Range{}, Delimiter{}, []rune("Abc"))
clearPatternCache()
pat3 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseIgnore, false, true, true, []Range{}, Delimiter{}, []rune("abc"))
clearPatternCache()
pat4 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseIgnore, false, true, true, []Range{}, Delimiter{}, []rune("Abc"))
clearPatternCache()
pat5 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseRespect, false, true, true, []Range{}, Delimiter{}, []rune("abc"))
clearPatternCache()
pat6 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseRespect, false, true, true, []Range{}, Delimiter{}, []rune("Abc"))

if string(pat1.text) != "abc" || pat1.caseSensitive != false ||
        string(pat2.text) != "Abc" || pat2.caseSensitive != true ||
        string(pat3.text) != "abc" || pat3.caseSensitive != false ||
        string(pat4.text) != "abc" || pat4.caseSensitive != false ||
        string(pat5.text) != "abc" || pat5.caseSensitive != true ||
        string(pat6.text) != "Abc" || pat6.caseSensitive != true {
        t.Error("Invalid case conversion")
}

}

func TestOrigTextAndTransformed(t *testing.T) {

pattern := BuildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, false, true, true, []Range{}, Delimiter{}, []rune("jg"))
tokens := Tokenize("junegunn", Delimiter{})
trans := Transform(tokens, []Range{{1, 1}})

origBytes := []byte("junegunn.choi")
for _, extended := range []bool{false, true} {
        chunk := Chunk{count: 1}
        chunk.items[0] = Item{
                text:        util.ToChars([]byte("junegunn")),
                origText:    &origBytes,
                transformed: &trans}
        pattern.extended = extended
        matches := pattern.matchChunk(&chunk, nil, slab) // No cache
        if !(matches[0].item.text.ToString() == "junegunn" &&
                string(*matches[0].item.origText) == "junegunn.choi" &&
                reflect.DeepEqual(*matches[0].item.transformed, trans)) {
                t.Error("Invalid match result", matches)
        }

        match, offsets, pos := pattern.MatchItem(&chunk.items[0], true, slab)
        if !(match.item.text.ToString() == "junegunn" &&
                string(*match.item.origText) == "junegunn.choi" &&
                offsets[0][0] == 0 && offsets[0][1] == 5 &&
                reflect.DeepEqual(*match.item.transformed, trans)) {
                t.Error("Invalid match result", match, offsets, extended)
        }
        if !((*pos)[0] == 4 && (*pos)[1] == 0) {
                t.Error("Invalid pos array", *pos)
        }
}

}

func TestCacheKey(t *testing.T) {

test := func(extended bool, patStr string, expected string, cacheable bool) {
        clearPatternCache()
        pat := BuildPattern(true, algo.FuzzyMatchV2, extended, CaseSmart, false, true, true, []Range{}, Delimiter{}, []rune(patStr))
        if pat.CacheKey() != expected {
                t.Errorf("Expected: %s, actual: %s", expected, pat.CacheKey())
        }
        if pat.cacheable != cacheable {
                t.Errorf("Expected: %t, actual: %t (%s)", cacheable, pat.cacheable, patStr)
        }
        clearPatternCache()
}
test(false, "foo !bar", "foo !bar", true)
test(false, "foo | bar !baz", "foo | bar !baz", true)
test(true, "foo  bar  baz", "foo\tbar\tbaz", true)
test(true, "foo !bar", "foo", false)
test(true, "foo !bar   baz", "foo\tbaz", false)
test(true, "foo | bar baz", "baz", false)
test(true, "foo | bar | baz", "", false)
test(true, "foo | bar !baz", "", false)
test(true, "| | foo", "", false)
test(true, "| | | foo", "foo", false)

}

func TestCacheable(t *testing.T) {

test := func(fuzzy bool, str string, expected string, cacheable bool) {
        clearPatternCache()
        pat := BuildPattern(fuzzy, algo.FuzzyMatchV2, true, CaseSmart, true, true, true, []Range{}, Delimiter{}, []rune(str))
        if pat.CacheKey() != expected {
                t.Errorf("Expected: %s, actual: %s", expected, pat.CacheKey())
        }
        if cacheable != pat.cacheable {
                t.Errorf("Invalid Pattern.cacheable for \"%s\": %v (expected: %v)", str, pat.cacheable, cacheable)
        }
        clearPatternCache()
}
test(true, "foo bar", "foo\tbar", true)
test(true, "foo 'bar", "foo\tbar", false)
test(true, "foo !bar", "foo", false)

test(false, "foo bar", "foo\tbar", true)
test(false, "foo 'bar", "foo", false)
test(false, "foo '", "foo", true)
test(false, "foo 'bar", "foo", false)
test(false, "foo !bar", "foo", false)

}