package strmangle

import (
	"strings"
	"testing"

	"github.com/nullbio/sqlboiler/dbdrivers"
)

var testColumns = []dbdrivers.Column{
	{Name: "friend_column", Type: "int", IsNullable: false},
	{Name: "enemy_column_thing", Type: "string", IsNullable: true},
}

func TestAutoIncPrimaryKey(t *testing.T) {
	t.Parallel()

	tests := map[string]struct {
		Expect  string
		Pkey    *dbdrivers.PrimaryKey
		Columns []dbdrivers.Column
	}{
		"nillcase": {
			Expect:  "",
			Pkey:    nil,
			Columns: nil,
		},
		"easycase": {
			Expect: "one",
			Pkey: &dbdrivers.PrimaryKey{
				Name:    "pkey",
				Columns: []string{"one"},
			},
			Columns: []dbdrivers.Column{
				dbdrivers.Column{
					Name:       "one",
					Type:       "int32",
					IsNullable: false,
					Default:    `nextval('abc'::regclass)`,
				},
			},
		},
		"missingcase": {
			Expect: "",
			Pkey: &dbdrivers.PrimaryKey{
				Name:    "pkey",
				Columns: []string{"two"},
			},
			Columns: []dbdrivers.Column{
				dbdrivers.Column{
					Name:       "one",
					Type:       "int32",
					IsNullable: false,
					Default:    `nextval('abc'::regclass)`,
				},
			},
		},
		"wrongtype": {
			Expect: "",
			Pkey: &dbdrivers.PrimaryKey{
				Name:    "pkey",
				Columns: []string{"one"},
			},
			Columns: []dbdrivers.Column{
				dbdrivers.Column{
					Name:       "one",
					Type:       "string",
					IsNullable: false,
					Default:    `nextval('abc'::regclass)`,
				},
			},
		},
		"nodefault": {
			Expect: "",
			Pkey: &dbdrivers.PrimaryKey{
				Name:    "pkey",
				Columns: []string{"one"},
			},
			Columns: []dbdrivers.Column{
				dbdrivers.Column{
					Name:       "one",
					Type:       "string",
					IsNullable: false,
					Default:    ``,
				},
			},
		},
		"nullable": {
			Expect: "",
			Pkey: &dbdrivers.PrimaryKey{
				Name:    "pkey",
				Columns: []string{"one"},
			},
			Columns: []dbdrivers.Column{
				dbdrivers.Column{
					Name:       "one",
					Type:       "string",
					IsNullable: true,
					Default:    `nextval('abc'::regclass)`,
				},
			},
		},
	}

	for testName, test := range tests {
		primaryKey := AutoIncPrimaryKey(test.Columns, test.Pkey)
		if primaryKey != test.Expect {
			t.Errorf("%s) wrong primary key, want: %q, got %q", testName, test.Expect, primaryKey)
		}
	}
}

func TestColumnNames(t *testing.T) {
	t.Parallel()

	cols := []dbdrivers.Column{
		dbdrivers.Column{Name: "one"},
		dbdrivers.Column{Name: "two"},
		dbdrivers.Column{Name: "three"},
	}

	out := strings.Join(ColumnNames(cols), " ")
	if out != "one two three" {
		t.Error("output was wrong:", out)
	}
}

func TestDriverUsesLastInsertID(t *testing.T) {
	t.Parallel()

	if DriverUsesLastInsertID("postgres") {
		t.Error("postgres does not support LastInsertId")
	}
	if !DriverUsesLastInsertID("mysql") {
		t.Error("postgres does support LastInsertId")
	}
}

func TestGenerateParamFlags(t *testing.T) {
	t.Parallel()

	x := GenerateParamFlags(5, 1)
	want := "$1,$2,$3,$4,$5"
	if want != x {
		t.Errorf("want %s, got %s", want, x)
	}
}

func TestSingular(t *testing.T) {
	t.Parallel()

	tests := []struct {
		In  string
		Out string
	}{
		{"hello_people", "hello_person"},
		{"hello_person", "hello_person"},
		{"friends", "friend"},
	}

	for i, test := range tests {
		if out := Singular(test.In); out != test.Out {
			t.Errorf("[%d] (%s) Out was wrong: %q, want: %q", i, test.In, out, test.Out)
		}
	}
}

func TestPlural(t *testing.T) {
	t.Parallel()

	tests := []struct {
		In  string
		Out string
	}{
		{"hello_person", "hello_people"},
		{"friend", "friends"},
		{"friends", "friends"},
	}

	for i, test := range tests {
		if out := Plural(test.In); out != test.Out {
			t.Errorf("[%d] (%s) Out was wrong: %q, want: %q", i, test.In, out, test.Out)
		}
	}
}

func TestTitleCase(t *testing.T) {
	t.Parallel()

	tests := []struct {
		In  string
		Out string
	}{
		{"hello_there", "HelloThere"},
		{"", ""},
		{"fun_id", "FunID"},
	}

	for i, test := range tests {
		if out := TitleCase(test.In); out != test.Out {
			t.Errorf("[%d] (%s) Out was wrong: %q, want: %q", i, test.In, out, test.Out)
		}
	}
}

func TestCamelCase(t *testing.T) {
	t.Parallel()

	tests := []struct {
		In  string
		Out string
	}{
		{"hello_there_sunny", "helloThereSunny"},
		{"", ""},
		{"fun_id_times", "funIDTimes"},
	}

	for i, test := range tests {
		if out := CamelCase(test.In); out != test.Out {
			t.Errorf("[%d] (%s) Out was wrong: %q, want: %q", i, test.In, out, test.Out)
		}
	}
}

func TestStringMap(t *testing.T) {
	t.Parallel()

	mapped := StringMap(strings.ToLower, []string{"HELLO", "WORLD"})
	if got := strings.Join(mapped, " "); got != "hello world" {
		t.Errorf("mapped was wrong: %q", got)
	}
}

func TestMakeDBName(t *testing.T) {
	t.Parallel()

	if out := MakeDBName("a", "b"); out != "a_b" {
		t.Error("Out was wrong:", out)
	}
}

func TestHasElement(t *testing.T) {
	t.Parallel()

	elements := []string{"one", "two"}
	if got := HasElement("one", elements); !got {
		t.Error("should have found element key")
	}
	if got := HasElement("three", elements); got {
		t.Error("should not have found element key")
	}
}

func TestPrefixStringSlice(t *testing.T) {
	t.Parallel()

	slice := PrefixStringSlice("o.", []string{"one", "two"})
	if got := strings.Join(slice, " "); got != "o.one o.two" {
		t.Error("wrong output:", got)
	}
}

func TestPrimaryKeyFuncSig(t *testing.T) {
	t.Parallel()

	cols := []dbdrivers.Column{
		{
			Name: "one",
			Type: "int64",
		},
		{
			Name: "two",
			Type: "string",
		},
		{
			Name: "three",
			Type: "string",
		},
	}

	sig := PrimaryKeyFuncSig(cols, []string{"one"})
	if sig != "one int64" {
		t.Error("wrong signature:", sig)
	}

	sig = PrimaryKeyFuncSig(cols, []string{"one", "three"})
	if sig != "one int64, three string" {
		t.Error("wrong signature:", sig)
	}
}

func TestWherePrimaryKey(t *testing.T) {
	t.Parallel()

	tests := []struct {
		Pkey   dbdrivers.PrimaryKey
		Start  int
		Should string
	}{
		{Pkey: dbdrivers.PrimaryKey{Columns: []string{"col1"}}, Start: 2, Should: "col1=$2"},
		{Pkey: dbdrivers.PrimaryKey{Columns: []string{"col1", "col2"}}, Start: 4, Should: "col1=$4 AND col2=$5"},
		{Pkey: dbdrivers.PrimaryKey{Columns: []string{"col1", "col2", "col3"}}, Start: 4, Should: "col1=$4 AND col2=$5 AND col3=$6"},
	}

	for i, test := range tests {
		r := WherePrimaryKey(test.Pkey.Columns, test.Start)
		if r != test.Should {
			t.Errorf("(%d) want: %s, got: %s\nTest: %#v", i, test.Should, r, test)
		}
	}
}

func TestWherePrimaryKeyPanic(t *testing.T) {
	t.Parallel()

	defer func() {
		if recover() == nil {
			t.Error("did not panic")
		}
	}()

	WherePrimaryKey(nil, 0)
}

func TestFilterColumnsByDefault(t *testing.T) {
	t.Parallel()

	cols := []dbdrivers.Column{
		{
			Name:    "col1",
			Default: "",
		},
		{
			Name:    "col2",
			Default: "things",
		},
		{
			Name:    "col3",
			Default: "",
		},
		{
			Name:    "col4",
			Default: "things2",
		},
	}

	res := FilterColumnsByDefault(cols, false)
	if res != `"col1","col3"` {
		t.Errorf("Invalid result: %s", res)
	}

	res = FilterColumnsByDefault(cols, true)
	if res != `"col2","col4"` {
		t.Errorf("Invalid result: %s", res)
	}

	res = FilterColumnsByDefault([]dbdrivers.Column{}, false)
	if res != `` {
		t.Errorf("Invalid result: %s", res)
	}
}

func TestFilterColumnsByAutoIncrement(t *testing.T) {
	t.Parallel()

	cols := []dbdrivers.Column{
		{
			Name:    "col1",
			Default: `nextval("thing"::thing)`,
		},
		{
			Name:    "col2",
			Default: "things",
		},
		{
			Name:    "col3",
			Default: "",
		},
		{
			Name:    "col4",
			Default: `nextval("thing"::thing)`,
		},
	}

	res := FilterColumnsByAutoIncrement(cols)
	if res != `"col1","col4"` {
		t.Errorf("Invalid result: %s", res)
	}

	res = FilterColumnsByAutoIncrement([]dbdrivers.Column{})
	if res != `` {
		t.Errorf("Invalid result: %s", res)
	}
}

func TestSubstring(t *testing.T) {
	t.Parallel()

	str := "hello"

	if got := Substring(0, 5, str); got != "hello" {
		t.Errorf("substring was wrong: %q", got)
	}
	if got := Substring(1, 4, str); got != "ell" {
		t.Errorf("substring was wrong: %q", got)
	}
	if got := Substring(2, 3, str); got != "l" {
		t.Errorf("substring was wrong: %q", got)
	}
	if got := Substring(5, 5, str); got != "" {
		t.Errorf("substring was wrong: %q", got)
	}
}