package parser

import "testing"

func TestKey(t *testing.T) {
	for _, test := range []parseTest{
		{"", []string{`Error: unexpected end of file (expected a key name) at start of file`}},
		// Bare key tests
		{"barekey", []string{`key("barekey")`}},
		{"1234567", []string{`key("1234567")`}},
		{"mix-12_34", []string{`key("mix-12_34")`}},
		{"-hey_good_Lookin123-", []string{`key("-hey_good_Lookin123-")`}},
		{"wrong!", []string{`key("wrong")`, `Error: unexpected input (expected end of file) at line 1, column 6`}},
		{"key1.", []string{`key("key1")`, `keydot`, `Error: unexpected end of file (expected a key name) at line 1, column 6`}},
		{"key1.key2", []string{`key("key1")`, `keydot`, `key("key2")`}},
		{"key . with . spaces", []string{`key("key")`, `keydot`, `key("with")`, `keydot`, `key("spaces")`}},
		{"key  \t  . \twithtabs\t . \tandspaces", []string{`key("key")`, `keydot`, `key("withtabs")`, `keydot`, `key("andspaces")`}},
		// Single quoted key tests
		{"''", []string{`key("")`}},
		{"'single quoted'", []string{`key("single quoted")`}},
		{`'escape\s are literal'`, []string{`key("escape\\s are literal")`}},
		{`'"using inner quotes"'`, []string{`key("\"using inner quotes\"")`}},
		// Double quoted key tests
		{`""`, []string{`key("")`}},
		{`"double quoted"`, []string{`key("double quoted")`}},
		{`"escapes are in\terpreted"`, []string{`key("escapes are in\terpreted")`}},
		{`"using 'inner' \"quotes\""`, []string{`key("using 'inner' \"quotes\"")`}},
		// Mixed key types
		{`this.'i\s'."madness\t".''`, []string{`key("this")`, `keydot`, `key("i\\s")`, `keydot`, `key("madness\t")`, `keydot`, `key("")`}},
	} {
		p := &parser{}
		testParseHandler(t, p, p.startKey, test)
	}
}

func TestAssignment(t *testing.T) {
	for _, test := range []parseTest{
		{"", []string{`Error: unexpected end of file (expected a value assignment) at start of file`}},
		{"=", []string{`assign`}},
		{" \t = \t ", []string{`assign`}},
		{" \n = \n ", []string{`Error: unexpected input (expected a value assignment) at start of file`}},
	} {
		p := &parser{}
		testParseHandler(t, p, p.startAssignment, test)
	}
}

func TestValue(t *testing.T) {
	for _, test := range []parseTest{
		{``, []string{`Error: unexpected end of file (expected a value) at start of file`}},
		{`"basic string value"`, []string{`string("basic string value")`}},
	} {
		p := &parser{}
		testParseHandler(t, p, p.startValue, test)
	}
}

func TestKeyValuePair(t *testing.T) {
	for _, test := range []parseTest{
		{"", []string{}},
		{" ", []string{}},
		{" \t ", []string{}},
		{" key ", []string{`key("key")`, `Error: unexpected input (expected a value assignment) at line 1, column 5`}},
		{" key \t=", []string{`key("key")`, `assign`, `Error: unexpected end of file (expected a value) at line 1, column 8`}},
		{"key = # INVALID", []string{`key("key")`, `assign`, `Error: unexpected input (expected a value) at line 1, column 7`}},
		{" key \t =\t \"The Value\"  \r\n", []string{`key("key")`, `assign`, `string("The Value")`}},
		{`3.14159 = "pi"`, []string{`key("3")`, `keydot`, `key("14159")`, `assign`, `string("pi")`}},
		{`"ʎǝʞ" = "value"`, []string{`key("ʎǝʞ")`, `assign`, `string("value")`}},
		{`key = "value"  # This is a comment at the end of a line`, []string{`key("key")`, `assign`, `string("value")`, `comment("# This is a comment at the end of a line")`}},
		{`another = "# This is not a comment"`, []string{`key("another")`, `assign`, `string("# This is not a comment")`}},
		{"key1=\"value1\"key2=\"value2\"\r\nkey3=\"value3\"", []string{
			`key("key1")`, `assign`, `string("value1")`,
			`key("key2")`, `assign`, `string("value2")`,
			`key("key3")`, `assign`, `string("value3")`}},
		{"with=\"comments\"# boring \nanother.cool =\"one\" \t # to the end\r\n", []string{
			`key("with")`, `assign`, `string("comments")`, `comment("# boring ")`,
			`key("another")`, `keydot`, `key("cool")`, `assign`, `string("one")`, `comment("# to the end")`}},
	} {
		p := &parser{}
		testParseHandler(t, p, p.startKeyValuePair, test)
	}
}