package wikilink_test

import (
	"testing"

	"code.ndumas.com/ndumas/wikilink-parser"
)

var testCases = []tc{
	{
		name: "wikilink",
		in:   "[[wikilink]]",
		expected: []wikilink.Lexeme{
			{Typ: wikilink.LexOpenLink, Val: "[["},
			{Typ: wikilink.LexIdent, Val: "wikilink"},
			{Typ: wikilink.LexCloseLink, Val: "]]"},
			{Typ: wikilink.LexText, Val: ""},
		},
	},
	{
		name: "wikilink|display name",
		in:   "[[wikilink|display name]]",
		expected: []wikilink.Lexeme{
			{Typ: wikilink.LexOpenLink, Val: "[["},
			{Typ: wikilink.LexIdent, Val: "wikilink"},
			{Typ: wikilink.LexAlias, Val: "|"},
			{Typ: wikilink.LexIdent, Val: "display name"},
			{Typ: wikilink.LexCloseLink, Val: "]]"},
			{Typ: wikilink.LexText, Val: ""},
		},
	},
	{
		name: "wikilink|display name|second pipe",
		in:   "[[wikilink|display name|second pipe]]",
		expected: []wikilink.Lexeme{
			{Typ: wikilink.LexOpenLink, Val: "[["},
			{Typ: wikilink.LexIdent, Val: "wikilink"},
			{Typ: wikilink.LexAlias, Val: "|"},
			{Typ: wikilink.LexIdent, Val: "display name"},
			{Typ: wikilink.LexAlias, Val: "|"},
			{Typ: wikilink.LexIdent, Val: "second pipe"},
			{Typ: wikilink.LexCloseLink, Val: "]]"},
			{Typ: wikilink.LexText, Val: ""},
		},
	},
	{
		name: "wikilink with numeric alias|420|second pipe",
		in:   "[[wikilink|420|second pipe]]",
		expected: []wikilink.Lexeme{
			{Typ: wikilink.LexOpenLink, Val: "[["},
			{Typ: wikilink.LexIdent, Val: "wikilink"},
			{Typ: wikilink.LexAlias, Val: "|"},
			{Typ: wikilink.LexIdent, Val: "420"},
			{Typ: wikilink.LexAlias, Val: "|"},
			{Typ: wikilink.LexIdent, Val: "second pipe"},
			{Typ: wikilink.LexCloseLink, Val: "]]"},
			{Typ: wikilink.LexText, Val: ""},
		},
	},
	{
		name: "wikilink with spaces in filename",
		in:   "[[wikilink spaces]]",
		expected: []wikilink.Lexeme{
			{Typ: wikilink.LexOpenLink, Val: "[["},
			{Typ: wikilink.LexIdent, Val: "wikilink spaces"},
			{Typ: wikilink.LexCloseLink, Val: "]]"},
			{Typ: wikilink.LexText, Val: ""},
		},
	},
	{
		name: "#heading",
		in:   "[[#heading]]",
		expected: []wikilink.Lexeme{
			{Typ: wikilink.LexOpenLink, Val: "[["},
			{Typ: wikilink.LexIdent, Val: ""},
			{Typ: wikilink.LexHeading, Val: "#"},
			{Typ: wikilink.LexIdent, Val: "heading"},
			{Typ: wikilink.LexCloseLink, Val: "]]"},
			{Typ: wikilink.LexText, Val: ""},
		},
	},
	{
		name: "wikilink#heading",
		in:   "[[wikilink#heading]]",
		expected: []wikilink.Lexeme{
			{Typ: wikilink.LexOpenLink, Val: "[["},
			{Typ: wikilink.LexIdent, Val: "wikilink"},
			{Typ: wikilink.LexHeading, Val: "#"},
			{Typ: wikilink.LexIdent, Val: "heading"},
			{Typ: wikilink.LexCloseLink, Val: "]]"},
			{Typ: wikilink.LexText, Val: ""},
		},
	},
	{
		name: "wikilink#heading|display name",
		in:   "[[wikilink#heading|display name]]",
		expected: []wikilink.Lexeme{
			{Typ: wikilink.LexOpenLink, Val: "[["},
			{Typ: wikilink.LexIdent, Val: "wikilink"},
			{Typ: wikilink.LexHeading, Val: "#"},
			{Typ: wikilink.LexIdent, Val: "heading"},
			{Typ: wikilink.LexAlias, Val: "|"},
			{Typ: wikilink.LexIdent, Val: "display name"},
			{Typ: wikilink.LexCloseLink, Val: "]]"},
			{Typ: wikilink.LexText, Val: ""},
		},
	},
	{
		name: "wikilink#heading|display name|second pipe",
		in:   "[[wikilink#heading|display name|second pipe]]",
		expected: []wikilink.Lexeme{
			{Typ: wikilink.LexOpenLink, Val: "[["},
			{Typ: wikilink.LexIdent, Val: "wikilink"},
			{Typ: wikilink.LexHeading, Val: "#"},
			{Typ: wikilink.LexIdent, Val: "heading"},
			{Typ: wikilink.LexAlias, Val: "|"},
			{Typ: wikilink.LexIdent, Val: "display name"},
			{Typ: wikilink.LexAlias, Val: "|"},
			{Typ: wikilink.LexIdent, Val: "second pipe"},
			{Typ: wikilink.LexCloseLink, Val: "]]"},
			{Typ: wikilink.LexText, Val: ""},
		},
	},
	{
		name: "wikilink with numeric aliases#heading|420|display name",
		in:   "[[wikilink#heading|420|second pipe]]",
		expected: []wikilink.Lexeme{
			{Typ: wikilink.LexOpenLink, Val: "[["},
			{Typ: wikilink.LexIdent, Val: "wikilink"},
			{Typ: wikilink.LexHeading, Val: "#"},
			{Typ: wikilink.LexIdent, Val: "heading"},
			{Typ: wikilink.LexAlias, Val: "|"},
			{Typ: wikilink.LexIdent, Val: "420"},
			{Typ: wikilink.LexAlias, Val: "|"},
			{Typ: wikilink.LexIdent, Val: "second pipe"},
			{Typ: wikilink.LexCloseLink, Val: "]]"},
			{Typ: wikilink.LexText, Val: ""},
		},
	},
	{
		name: "#^blockRef",
		in:   "[[#^blockRef]]",
		expected: []wikilink.Lexeme{
			{Typ: wikilink.LexOpenLink, Val: "[["},
			{Typ: wikilink.LexIdent, Val: ""},
			{Typ: wikilink.LexBlockRef, Val: "#^"},
			{Typ: wikilink.LexIdent, Val: "blockRef"},
			{Typ: wikilink.LexCloseLink, Val: "]]"},
			{Typ: wikilink.LexText, Val: ""},
		},
	},
	{
		name: "wikilink#^blockRef",
		in:   "[[wikilink#^blockRef]]",
		expected: []wikilink.Lexeme{
			{Typ: wikilink.LexOpenLink, Val: "[["},
			{Typ: wikilink.LexIdent, Val: "wikilink"},
			{Typ: wikilink.LexBlockRef, Val: "#^"},
			{Typ: wikilink.LexIdent, Val: "blockRef"},
			{Typ: wikilink.LexCloseLink, Val: "]]"},
			{Typ: wikilink.LexText, Val: ""},
		},
	},
	{
		name: "wikilink#^blockRef|display name",
		in:   "[[wikilink#^blockRef|display name]]",
		expected: []wikilink.Lexeme{
			{Typ: wikilink.LexOpenLink, Val: "[["},
			{Typ: wikilink.LexIdent, Val: "wikilink"},
			{Typ: wikilink.LexBlockRef, Val: "#^"},
			{Typ: wikilink.LexIdent, Val: "blockRef"},
			{Typ: wikilink.LexAlias, Val: "|"},
			{Typ: wikilink.LexIdent, Val: "display name"},
			{Typ: wikilink.LexCloseLink, Val: "]]"},
			{Typ: wikilink.LexText, Val: ""},
		},
	},
	{
		name: "wikilink#^blockRef|display name|second pipe",
		in:   "[[wikilink#^blockRef|display name|second pipe]]",
		expected: []wikilink.Lexeme{
			{Typ: wikilink.LexOpenLink, Val: "[["},
			{Typ: wikilink.LexIdent, Val: "wikilink"},
			{Typ: wikilink.LexBlockRef, Val: "#^"},
			{Typ: wikilink.LexIdent, Val: "blockRef"},
			{Typ: wikilink.LexAlias, Val: "|"},
			{Typ: wikilink.LexIdent, Val: "display name"},
			{Typ: wikilink.LexAlias, Val: "|"},
			{Typ: wikilink.LexIdent, Val: "second pipe"},
			{Typ: wikilink.LexCloseLink, Val: "]]"},
			{Typ: wikilink.LexText, Val: ""},
		},
	},
	{
		name: "wikilink with numeric aliases#^blockRef|420|second pipe",
		in:   "[[wikilink#^blockRef|420|second pipe]]",
		expected: []wikilink.Lexeme{
			{Typ: wikilink.LexOpenLink, Val: "[["},
			{Typ: wikilink.LexIdent, Val: "wikilink"},
			{Typ: wikilink.LexBlockRef, Val: "#^"},
			{Typ: wikilink.LexIdent, Val: "blockRef"},
			{Typ: wikilink.LexAlias, Val: "|"},
			{Typ: wikilink.LexIdent, Val: "420"},
			{Typ: wikilink.LexAlias, Val: "|"},
			{Typ: wikilink.LexIdent, Val: "second pipe"},
			{Typ: wikilink.LexCloseLink, Val: "]]"},
			{Typ: wikilink.LexText, Val: ""},
		},
	},
}

func Test_ObsidianWikilinks_LinksStartOfInput(t *testing.T) {
	for _, tc := range testCases {
		mut, test := mutateTestCase(
			tc,
			"",
			" test data please ignore",

			[]wikilink.Lexeme{
				{Typ: wikilink.LexText, Val: ""},
			},
			[]wikilink.Lexeme{
				{Typ: wikilink.LexText, Val: " test data please ignore"},
			},
		)
		t.Run(mut.name, test)
	}
}

func Test_ObsidianWikilinks_LinksEndOfInput(t *testing.T) {
	for _, tc := range testCases {
		mut, test := mutateTestCase(
			tc,
			"this is a ",
			"",
			[]wikilink.Lexeme{
				{Typ: wikilink.LexText, Val: "this is a "},
			},
			nil,
		)
		t.Run(mut.name, test)
	}
}

func Test_ObsidianWikilinks_Basic(t *testing.T) {
	// t.Parallel()

	for _, tc := range testCases {
		mut, test := mutateTestCase(
			tc,
			"",
			"",
			[]wikilink.Lexeme{
				{Typ: wikilink.LexText, Val: ""},
			},
			nil,
		)
		t.Run(mut.name, test)
	}
}

type tc struct {
	name     string
	in       string
	expected []wikilink.Lexeme
}

func mutateTestCase(tc tc, prefix, suffix string, expectedPrefix, expectedSuffix []wikilink.Lexeme) (tc, func(t *testing.T)) {
	tc.in = prefix + tc.in
	tc.in = tc.in + suffix
	if expectedPrefix != nil {
		tc.expected = append(expectedPrefix, tc.expected...)
	}
	if expectedSuffix != nil {
		tc.expected = append(tc.expected, expectedSuffix...)
	}

	return tc, func(t *testing.T) {
		// t.Parallel()
		l := wikilink.Lex("testLexer", tc.in)
		defer l.L.Sync()
		if len(tc.expected) != len(l.Items) {
			t.Logf("expected %d tokens, got %d\n", len(tc.expected), len(l.Items))
			t.Logf("expected items: %#v\n", tc.expected)
			t.Logf("raw items: %#v\n", l.Items)
			t.Fail()

			return
		}
		for i, e := range tc.expected {
			n := l.Items[i]
			if e.Typ != n.Typ {
				t.Logf("expected Type %s, received %s", e.Typ.String(), n.Typ.String())
				t.Fail()

				return
			}

			if e.Val != n.Val {
				t.Logf("expected Value %q, received %q", e.Val, n.Val)
				t.Fail()

				return
			}
		}
	}
}