// Copyright 2014 beego Author. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package orm

import (
	"database/sql"
	"encoding/json"
	"fmt"
	"os"
	"strings"
	"time"

	"github.com/astaxie/beego/pkg/orm/hints"

	_ "github.com/go-sql-driver/mysql"
	_ "github.com/lib/pq"
	_ "github.com/mattn/go-sqlite3"
	// As tidb can't use go get, so disable the tidb testing now
	// _ "github.com/pingcap/tidb"
)

// A slice string field.
type SliceStringField []string

func (e SliceStringField) Value() []string {
	return []string(e)
}

func (e *SliceStringField) Set(d []string) {
	*e = SliceStringField(d)
}

func (e *SliceStringField) Add(v string) {
	*e = append(*e, v)
}

func (e *SliceStringField) String() string {
	return strings.Join(e.Value(), ",")
}

func (e *SliceStringField) FieldType() int {
	return TypeVarCharField
}

func (e *SliceStringField) SetRaw(value interface{}) error {
	f := func(str string) {
		if len(str) > 0 {
			parts := strings.Split(str, ",")
			v := make([]string, 0, len(parts))
			for _, p := range parts {
				v = append(v, strings.TrimSpace(p))
			}
			e.Set(v)
		}
	}

	switch d := value.(type) {
	case []string:
		e.Set(d)
	case string:
		f(d)
	case []byte:
		f(string(d))
	default:
		return fmt.Errorf("<SliceStringField.SetRaw> unknown value `%v`", value)
	}
	return nil
}

func (e *SliceStringField) RawValue() interface{} {
	return e.String()
}

var _ Fielder = new(SliceStringField)

// A json field.
type JSONFieldTest struct {
	Name string
	Data string
}

func (e *JSONFieldTest) String() string {
	data, _ := json.Marshal(e)
	return string(data)
}

func (e *JSONFieldTest) FieldType() int {
	return TypeTextField
}

func (e *JSONFieldTest) SetRaw(value interface{}) error {
	switch d := value.(type) {
	case string:
		return json.Unmarshal([]byte(d), e)
	case []byte:
		return json.Unmarshal(d, e)
	default:
		return fmt.Errorf("<JSONField.SetRaw> unknown value `%v`", value)
	}
}

func (e *JSONFieldTest) RawValue() interface{} {
	return e.String()
}

var _ Fielder = new(JSONFieldTest)

type Data struct {
	ID       int `orm:"column(id)"`
	Boolean  bool
	Char     string    `orm:"size(50)"`
	Text     string    `orm:"type(text)"`
	JSON     string    `orm:"type(json);default({\"name\":\"json\"})"`
	Jsonb    string    `orm:"type(jsonb)"`
	Time     time.Time `orm:"type(time)"`
	Date     time.Time `orm:"type(date)"`
	DateTime time.Time `orm:"column(datetime)"`
	Byte     byte
	Rune     rune
	Int      int
	Int8     int8
	Int16    int16
	Int32    int32
	Int64    int64
	Uint     uint
	Uint8    uint8
	Uint16   uint16
	Uint32   uint32
	Uint64   uint64
	Float32  float32
	Float64  float64
	Decimal  float64 `orm:"digits(8);decimals(4)"`
}

type DataNull struct {
	ID          int             `orm:"column(id)"`
	Boolean     bool            `orm:"null"`
	Char        string          `orm:"null;size(50)"`
	Text        string          `orm:"null;type(text)"`
	JSON        string          `orm:"type(json);null"`
	Jsonb       string          `orm:"type(jsonb);null"`
	Time        time.Time       `orm:"null;type(time)"`
	Date        time.Time       `orm:"null;type(date)"`
	DateTime    time.Time       `orm:"null;column(datetime)"`
	Byte        byte            `orm:"null"`
	Rune        rune            `orm:"null"`
	Int         int             `orm:"null"`
	Int8        int8            `orm:"null"`
	Int16       int16           `orm:"null"`
	Int32       int32           `orm:"null"`
	Int64       int64           `orm:"null"`
	Uint        uint            `orm:"null"`
	Uint8       uint8           `orm:"null"`
	Uint16      uint16          `orm:"null"`
	Uint32      uint32          `orm:"null"`
	Uint64      uint64          `orm:"null"`
	Float32     float32         `orm:"null"`
	Float64     float64         `orm:"null"`
	Decimal     float64         `orm:"digits(8);decimals(4);null"`
	NullString  sql.NullString  `orm:"null"`
	NullBool    sql.NullBool    `orm:"null"`
	NullFloat64 sql.NullFloat64 `orm:"null"`
	NullInt64   sql.NullInt64   `orm:"null"`
	BooleanPtr  *bool           `orm:"null"`
	CharPtr     *string         `orm:"null;size(50)"`
	TextPtr     *string         `orm:"null;type(text)"`
	BytePtr     *byte           `orm:"null"`
	RunePtr     *rune           `orm:"null"`
	IntPtr      *int            `orm:"null"`
	Int8Ptr     *int8           `orm:"null"`
	Int16Ptr    *int16          `orm:"null"`
	Int32Ptr    *int32          `orm:"null"`
	Int64Ptr    *int64          `orm:"null"`
	UintPtr     *uint           `orm:"null"`
	Uint8Ptr    *uint8          `orm:"null"`
	Uint16Ptr   *uint16         `orm:"null"`
	Uint32Ptr   *uint32         `orm:"null"`
	Uint64Ptr   *uint64         `orm:"null"`
	Float32Ptr  *float32        `orm:"null"`
	Float64Ptr  *float64        `orm:"null"`
	DecimalPtr  *float64        `orm:"digits(8);decimals(4);null"`
	TimePtr     *time.Time      `orm:"null;type(time)"`
	DatePtr     *time.Time      `orm:"null;type(date)"`
	DateTimePtr *time.Time      `orm:"null"`
}

type String string
type Boolean bool
type Byte byte
type Rune rune
type Int int
type Int8 int8
type Int16 int16
type Int32 int32
type Int64 int64
type Uint uint
type Uint8 uint8
type Uint16 uint16
type Uint32 uint32
type Uint64 uint64
type Float32 float64
type Float64 float64

type DataCustom struct {
	ID      int `orm:"column(id)"`
	Boolean Boolean
	Char    string `orm:"size(50)"`
	Text    string `orm:"type(text)"`
	Byte    Byte
	Rune    Rune
	Int     Int
	Int8    Int8
	Int16   Int16
	Int32   Int32
	Int64   Int64
	Uint    Uint
	Uint8   Uint8
	Uint16  Uint16
	Uint32  Uint32
	Uint64  Uint64
	Float32 Float32
	Float64 Float64
	Decimal Float64 `orm:"digits(8);decimals(4)"`
}

// only for mysql
type UserBig struct {
	ID   uint64 `orm:"column(id)"`
	Name string
}

type User struct {
	ID           int    `orm:"column(id)"`
	UserName     string `orm:"size(30);unique"`
	Email        string `orm:"size(100)"`
	Password     string `orm:"size(100)"`
	Status       int16  `orm:"column(Status)"`
	IsStaff      bool
	IsActive     bool      `orm:"default(true)"`
	Created      time.Time `orm:"auto_now_add;type(date)"`
	Updated      time.Time `orm:"auto_now"`
	Profile      *Profile  `orm:"null;rel(one);on_delete(set_null)"`
	Posts        []*Post   `orm:"reverse(many)" json:"-"`
	ShouldSkip   string    `orm:"-"`
	Nums         int
	Langs        SliceStringField `orm:"size(100)"`
	Extra        JSONFieldTest    `orm:"type(text)"`
	unexport     bool             `orm:"-"`
	unexportBool bool
}

func (u *User) TableIndex() [][]string {
	return [][]string{
		{"Id", "UserName"},
		{"Id", "Created"},
	}
}

func (u *User) TableUnique() [][]string {
	return [][]string{
		{"UserName", "Email"},
	}
}

func NewUser() *User {
	obj := new(User)
	return obj
}

type Profile struct {
	ID       int `orm:"column(id)"`
	Age      int16
	Money    float64
	User     *User `orm:"reverse(one)" json:"-"`
	BestPost *Post `orm:"rel(one);null"`
}

func (u *Profile) TableName() string {
	return "user_profile"
}

func NewProfile() *Profile {
	obj := new(Profile)
	return obj
}

type Post struct {
	ID      int       `orm:"column(id)"`
	User    *User     `orm:"rel(fk)"`
	Title   string    `orm:"size(60)"`
	Content string    `orm:"type(text)"`
	Created time.Time `orm:"auto_now_add"`
	Updated time.Time `orm:"auto_now"`
	Tags    []*Tag    `orm:"rel(m2m);rel_through(github.com/astaxie/beego/pkg/orm.PostTags)"`
}

func (u *Post) TableIndex() [][]string {
	return [][]string{
		{"Id", "Created"},
	}
}

func NewPost() *Post {
	obj := new(Post)
	return obj
}

type Tag struct {
	ID       int     `orm:"column(id)"`
	Name     string  `orm:"size(30)"`
	BestPost *Post   `orm:"rel(one);null"`
	Posts    []*Post `orm:"reverse(many)" json:"-"`
}

func NewTag() *Tag {
	obj := new(Tag)
	return obj
}

type PostTags struct {
	ID   int   `orm:"column(id)"`
	Post *Post `orm:"rel(fk)"`
	Tag  *Tag  `orm:"rel(fk)"`
}

func (m *PostTags) TableName() string {
	return "prefix_post_tags"
}

type Comment struct {
	ID      int       `orm:"column(id)"`
	Post    *Post     `orm:"rel(fk);column(post)"`
	Content string    `orm:"type(text)"`
	Parent  *Comment  `orm:"null;rel(fk)"`
	Created time.Time `orm:"auto_now_add"`
}

func NewComment() *Comment {
	obj := new(Comment)
	return obj
}

type Group struct {
	ID          int `orm:"column(gid);size(32)"`
	Name        string
	Permissions []*Permission `orm:"reverse(many)" json:"-"`
}

type Permission struct {
	ID     int `orm:"column(id)"`
	Name   string
	Groups []*Group `orm:"rel(m2m);rel_through(github.com/astaxie/beego/pkg/orm.GroupPermissions)"`
}

type GroupPermissions struct {
	ID         int         `orm:"column(id)"`
	Group      *Group      `orm:"rel(fk)"`
	Permission *Permission `orm:"rel(fk)"`
}

type ModelID struct {
	ID int64
}

type ModelBase struct {
	ModelID

	Created time.Time `orm:"auto_now_add;type(datetime)"`
	Updated time.Time `orm:"auto_now;type(datetime)"`
}

type InLine struct {
	// Common Fields
	ModelBase

	// Other Fields
	Name  string `orm:"unique"`
	Email string
}

type Index struct {
	// Common Fields
	Id int `orm:"column(id)"`

	// Other Fields
	F1 int `orm:"column(f1);index"`
	F2 int `orm:"column(f2);index"`
}

func NewInLine() *InLine {
	return new(InLine)
}

type InLineOneToOne struct {
	// Common Fields
	ModelBase

	Note   string
	InLine *InLine `orm:"rel(fk);column(inline)"`
}

func NewInLineOneToOne() *InLineOneToOne {
	return new(InLineOneToOne)
}

type IntegerPk struct {
	ID    int64 `orm:"pk"`
	Value string
}

type UintPk struct {
	ID   uint32 `orm:"pk"`
	Name string
}

type PtrPk struct {
	ID       *IntegerPk `orm:"pk;rel(one)"`
	Positive bool
}

type StrPk struct {
	Id    string `orm:"column(id);size(64);pk"`
	Value string
}

var DBARGS = struct {
	Driver string
	Source string
	Debug  string
}{
	os.Getenv("ORM_DRIVER"),
	os.Getenv("ORM_SOURCE"),
	os.Getenv("ORM_DEBUG"),
}

var (
	IsMysql    = DBARGS.Driver == "mysql"
	IsSqlite   = DBARGS.Driver == "sqlite3"
	IsPostgres = DBARGS.Driver == "postgres"
	IsTidb     = DBARGS.Driver == "tidb"
)

var (
	dORM     Ormer
	dDbBaser dbBaser
)

var (
	helpinfo = `need driver and source!

	Default DB Drivers.
	
	  driver: url
	   mysql: https://github.com/go-sql-driver/mysql
	 sqlite3: https://github.com/mattn/go-sqlite3
	postgres: https://github.com/lib/pq
	tidb: https://github.com/pingcap/tidb
	
	usage:
	
	go get -u github.com/astaxie/beego/pkg/orm
	go get -u github.com/go-sql-driver/mysql
	go get -u github.com/mattn/go-sqlite3
	go get -u github.com/lib/pq
	go get -u github.com/pingcap/tidb
	
	#### MySQL
	mysql -u root -e 'create database orm_test;'
	export ORM_DRIVER=mysql
	export ORM_SOURCE="root:@/orm_test?charset=utf8"
	go test -v github.com/astaxie/beego/pkg/orm
	
	
	#### Sqlite3
	export ORM_DRIVER=sqlite3
	export ORM_SOURCE='file:memory_test?mode=memory'
	go test -v github.com/astaxie/beego/pkg/orm
	
	
	#### PostgreSQL
	psql -c 'create database orm_test;' -U postgres
	export ORM_DRIVER=postgres
	export ORM_SOURCE="user=postgres dbname=orm_test sslmode=disable"
	go test -v github.com/astaxie/beego/pkg/orm
	
	#### TiDB
	export ORM_DRIVER=tidb
	export ORM_SOURCE='memory://test/test'
	go test -v github.com/astaxie/beego/pgk/orm
	
	`
)

func init() {
	Debug, _ = StrTo(DBARGS.Debug).Bool()

	if DBARGS.Driver == "" || DBARGS.Source == "" {
		fmt.Println(helpinfo)
		os.Exit(2)
	}

	err := RegisterDataBase("default", DBARGS.Driver, DBARGS.Source, hints.MaxIdleConnections(20))

	if err != nil {
		panic(fmt.Sprintf("can not register database: %v", err))
	}

	alias := getDbAlias("default")
	if alias.Driver == DRMySQL {
		alias.Engine = "INNODB"
	}

}