package parse

import (
	"encoding/base64"
	"mime"
	"testing"

	"github.com/tdewolff/test"
)

func TestParseNumber(t *testing.T) {
	var numberTests = []struct {
		number   string
		expected int
	}{
		{"5", 1},
		{"0.51", 4},
		{"0.5e-99", 7},
		{"0.5e-", 3},
		{"+50.0", 5},
		{".0", 2},
		{"0.", 1},
		{"", 0},
		{"+", 0},
		{".", 0},
		{"a", 0},
	}
	for _, tt := range numberTests {
		t.Run(tt.number, func(t *testing.T) {
			n := Number([]byte(tt.number))
			test.T(t, n, tt.expected)
		})
	}
}

func TestParseDimension(t *testing.T) {
	var dimensionTests = []struct {
		dimension    string
		expectedNum  int
		expectedUnit int
	}{
		{"5px", 1, 2},
		{"5px ", 1, 2},
		{"5%", 1, 1},
		{"5em", 1, 2},
		{"px", 0, 0},
		{"1", 1, 0},
		{"1~", 1, 0},
	}
	for _, tt := range dimensionTests {
		t.Run(tt.dimension, func(t *testing.T) {
			num, unit := Dimension([]byte(tt.dimension))
			test.T(t, num, tt.expectedNum, "number")
			test.T(t, unit, tt.expectedUnit, "unit")
		})
	}
}

func TestMediatype(t *testing.T) {
	var mediatypeTests = []struct {
		mediatype        string
		expectedMimetype string
		expectedParams   map[string]string
	}{
		{"text/plain", "text/plain", nil},
		{"text/plain;charset=US-ASCII", "text/plain", map[string]string{"charset": "US-ASCII"}},
		{" text/plain  ; charset = US-ASCII ", "text/plain", map[string]string{"charset": "US-ASCII"}},
		{" text/plain  a", "text/plain", nil},
		{"text/plain;base64", "text/plain", map[string]string{"base64": ""}},
		{"text/plain;inline=;base64", "text/plain", map[string]string{"inline": "", "base64": ""}},
		{"ÿ   ", "ÿ ", nil}, // OSS-Fuzz; ÿ is two bytes in UTF8
		{"ÿ  ;", "ÿ ", map[string]string{"": ""}},
	}
	for _, tt := range mediatypeTests {
		t.Run(tt.mediatype, func(t *testing.T) {
			mimetype, params := Mediatype([]byte(tt.mediatype))
			test.String(t, string(mimetype), tt.expectedMimetype, "mimetype")
			test.T(t, params, tt.expectedParams, "parameters") // TODO
		})
	}
}

func TestParseDataURI(t *testing.T) {
	var dataURITests = []struct {
		dataURI          string
		expectedMimetype string
		expectedData     string
		expectedErr      error
	}{
		{"www.domain.com", "", "", ErrBadDataURI},
		{"data:,", "text/plain", "", nil},
		{"data:text/xml,", "text/xml", "", nil},
		{"data:,text", "text/plain", "text", nil},
		{"data:;base64,dGV4dA==", "text/plain", "text", nil},
		{"data:image/svg+xml,", "image/svg+xml", "", nil},
		{"data:;base64,()", "", "", base64.CorruptInputError(0)},
		{"data:image/svg+xml,%3Cpath%20stroke-width='9.38%'/%3E", "image/svg+xml", "<path stroke-width='9.38%'/>", nil},
		{"data:,%ii", "text/plain", "%ii", nil},
	}
	for _, tt := range dataURITests {
		t.Run(tt.dataURI, func(t *testing.T) {
			mimetype, data, err := DataURI([]byte(tt.dataURI))
			test.T(t, err, tt.expectedErr)
			test.String(t, string(mimetype), tt.expectedMimetype, "mimetype")
			test.String(t, string(data), tt.expectedData, "data")
		})
	}
}

func TestParseQuoteEntity(t *testing.T) {
	var quoteEntityTests = []struct {
		quoteEntity   string
		expectedQuote byte
		expectedN     int
	}{
		{"&#34;", '"', 5},
		{"&#039;", '\'', 6},
		{"&#x0022;", '"', 8},
		{"&#x27;", '\'', 6},
		{"&quot;", '"', 6},
		{"&apos;", '\'', 6},
		{"&gt;", 0x00, 0},
		{"&amp;", 0x00, 0},
	}
	for _, tt := range quoteEntityTests {
		t.Run(tt.quoteEntity, func(t *testing.T) {
			quote, n := QuoteEntity([]byte(tt.quoteEntity))
			test.T(t, quote, tt.expectedQuote, "quote")
			test.T(t, n, tt.expectedN, "quote length")
		})
	}
}

////////////////////////////////////////////////////////////////

func BenchmarkParseMediatypeStd(b *testing.B) {
	mediatype := "text/plain"
	for i := 0; i < b.N; i++ {
		mime.ParseMediaType(mediatype)
	}
}

func BenchmarkParseMediatypeParamStd(b *testing.B) {
	mediatype := "text/plain;inline=1"
	for i := 0; i < b.N; i++ {
		mime.ParseMediaType(mediatype)
	}
}

func BenchmarkParseMediatypeParamsStd(b *testing.B) {
	mediatype := "text/plain;charset=US-ASCII;language=US-EN;compression=gzip;base64"
	for i := 0; i < b.N; i++ {
		mime.ParseMediaType(mediatype)
	}
}

func BenchmarkParseMediatypeParse(b *testing.B) {
	mediatype := []byte("text/plain")
	for i := 0; i < b.N; i++ {
		Mediatype(mediatype)
	}
}

func BenchmarkParseMediatypeParamParse(b *testing.B) {
	mediatype := []byte("text/plain;inline=1")
	for i := 0; i < b.N; i++ {
		Mediatype(mediatype)
	}
}

func BenchmarkParseMediatypeParamsParse(b *testing.B) {
	mediatype := []byte("text/plain;charset=US-ASCII;language=US-EN;compression=gzip;base64")
	for i := 0; i < b.N; i++ {
		Mediatype(mediatype)
	}
}
