package meta_test

import (
	"git.bit5.ru/backend/meta/v5"
	"github.com/pkg/errors"
)

func CreateTestParent(id uint32) (meta.Readable, error) {
	if id == 111 {
		return &TestParent{}, nil
	}
	return nil, errors.Errorf("wrong id")
}

type TestParent struct {
	Field1 string      `json:"f1" msgpack:"f1"`
	Field2 TestFoo     `json:"f2" msgpack:"f2"`
	Field3 []int8      `json:"f3" msgpack:"f3"`
	Field4 []TestFoo   `json:"f4" msgpack:"f4"`
	Field5 ITestParent `json:"f5" msgpack:"f5"`
}

type ITestParent interface {
	meta.Struct
	PtrTestParent() *TestParent
}

func (s *TestParent) PtrTestParent() *TestParent {
	return s
}

func (s *TestParent) ClassId() uint32 {
	return 111
}

func (s *TestParent) ClassName() string {
	return "TestParent"
}

func (s *TestParent) Reset() {

	s.Field1 = ""
	s.Field2.Reset()
	if s.Field3 == nil {
		s.Field3 = make([]int8, 0)
	} else {
		s.Field3 = s.Field3[:0]
	}
	if s.Field4 == nil {
		s.Field4 = make([]TestFoo, 0)
	} else {
		s.Field4 = s.Field4[:0]
	}

	s.Field5 = nil

}

func (s *TestParent) Read(reader meta.Reader) error {
	if err := reader.BeginContainer(""); err != nil {
		return err
	}
	if err := s.ReadFields(reader); err != nil {
		return err
	}
	return reader.EndContainer()
}

func (s *TestParent) ReadFields(reader meta.Reader) error {
	s.Reset()

	contSize, err := reader.ContainerSize()
	if err != nil {
		return err
	}

	if contSize < 5 {
		contSize = 5
	}

	if contSize <= 0 {
		return nil
	}

	contSize--
	if err := reader.ReadString(&s.Field1, "f1"); err != nil {
		return err
	}

	if contSize <= 0 {
		return nil
	}

	contSize--
	if err := reader.BeginContainer("f2"); err != nil {
		return err
	}
	if err := s.Field2.ReadFields(reader); err != nil {
		return err
	}
	if err := reader.EndContainer(); err != nil {
		return err
	}

	if contSize <= 0 {
		return nil
	}

	contSize--
	if err := reader.BeginCollection("f3"); err != nil {
		return err
	}
	field3Size, err := reader.ContainerSize()
	if err != nil {
		return err
	}
	for ; field3Size > 0; field3Size-- {
		var tmpField3 int8
		if err := reader.ReadInt8(&tmpField3, ""); err != nil {
			return err
		}

		s.Field3 = append(s.Field3, tmpField3)
	}
	if err := reader.EndCollection(); err != nil {
		return err
	}

	if contSize <= 0 {
		return nil
	}

	contSize--
	if err := reader.BeginCollection("f4"); err != nil {
		return err
	}
	field4Size, err := reader.ContainerSize()
	if err != nil {
		return err
	}
	for ; field4Size > 0; field4Size-- {
		var tmpField4 TestFoo
		if err := reader.BeginContainer(""); err != nil {
			return err
		}
		if err := tmpField4.ReadFields(reader); err != nil {
			return err
		}
		if err := reader.EndContainer(); err != nil {
			return err
		}

		s.Field4 = append(s.Field4, tmpField4)
	}
	if err := reader.EndCollection(); err != nil {
		return err
	}

	if contSize <= 0 {
		return nil
	}

	contSize--
	if v, err := meta.ReadGeneric(reader, CreateTestParent, "f5"); err != nil {
		if err != meta.FieldNotFound {
			return err
		}
	} else {
		if v != nil {
			s.Field5 = v.(ITestParent)
		}
	}

	return nil
}

func (s *TestParent) Write(writer meta.Writer) error {
	if err := writer.BeginContainer(4, ""); err != nil {
		return err
	}
	if err := s.WriteFields(writer); err != nil {
		return err
	}
	return writer.EndContainer()
}

func (s *TestParent) WriteFields(writer meta.Writer) error {

	if err := writer.WriteString(s.Field1, "f1"); err != nil {
		return err
	}

	if err := writer.BeginContainer(1, "f2"); err != nil {
		return err
	}
	if err := s.Field2.WriteFields(writer); err != nil {
		return err
	}
	if err := writer.EndContainer(); err != nil {
		return err
	}

	if err := writer.BeginCollection(len(s.Field3), "f3"); err != nil {
		return err
	}
	for _, v := range s.Field3 {
		if err := writer.WriteInt8(v, ""); err != nil {
			return err
		}
	}
	if err := writer.EndCollection(); err != nil {
		return err
	}

	if err := writer.BeginCollection(len(s.Field4), "f4"); err != nil {
		return err
	}
	for _, v := range s.Field4 {
		if err := writer.BeginContainer(1, ""); err != nil {
			return err
		}
		if err := v.WriteFields(writer); err != nil {
			return err
		}
		if err := writer.EndContainer(); err != nil {
			return err
		}

	}
	if err := writer.EndCollection(); err != nil {
		return err
	}

	return nil
}

func (s *TestParent) FieldsCount() int {
	return 5
}

type TestChild struct {
	TestParent

	Field string `json:"f" msgpack:"f"`
}

func (s *TestChild) Reset() {
	s.TestParent.Reset()

	s.Field = ""

}

func (s *TestChild) Read(reader meta.Reader) error {
	if err := reader.BeginContainer(""); err != nil {
		return err
	}
	if err := s.ReadFields(reader); err != nil {
		return err
	}
	return reader.EndContainer()
}

func (s *TestChild) ReadFields(reader meta.Reader) error {
	s.Reset()

	contSize, err := reader.ContainerSize()
	if err != nil {
		return err
	}

	if contSize < 1 {
		contSize = 1
	}

	if err := s.TestParent.ReadFields(reader); err != nil {
		return err
	}

	if contSize <= 0 {
		return nil
	}

	contSize--
	if err := reader.ReadString(&s.Field, "f"); err != nil {
		return err
	}

	return nil
}

func (s *TestChild) Write(writer meta.Writer) error {
	if err := writer.BeginContainer(5, ""); err != nil {
		return err
	}
	if err := s.WriteFields(writer); err != nil {
		return err
	}
	return writer.EndContainer()
}

func (s *TestChild) WriteFields(writer meta.Writer) error {
	if err := s.TestParent.WriteFields(writer); err != nil {
		return err
	}

	if err := writer.WriteString(s.Field, "f"); err != nil {
		return err
	}

	return nil
}

type TestFoo struct {
	Field int64 `json:"field" msgpack:"field"`
}

func (s *TestFoo) Reset() {

	s.Field = 0

}

func (s *TestFoo) Read(reader meta.Reader) error {
	if err := reader.BeginContainer(""); err != nil {
		return err
	}
	if err := s.ReadFields(reader); err != nil {
		return err
	}
	return reader.EndContainer()
}

func (s *TestFoo) ReadFields(reader meta.Reader) error {
	s.Reset()

	contSize, err := reader.ContainerSize()
	if err != nil {
		return err
	}

	if contSize < 1 {
		contSize = 1
	}

	if contSize <= 0 {
		return nil
	}

	contSize--
	if err := reader.ReadInt64(&s.Field, "field"); err != nil {
		return err
	}

	return nil
}

func (s *TestFoo) Write(writer meta.Writer) error {
	if err := writer.BeginContainer(1, ""); err != nil {
		return err
	}
	if err := s.WriteFields(writer); err != nil {
		return err
	}
	return writer.EndContainer()
}

func (s *TestFoo) WriteFields(writer meta.Writer) error {

	if err := writer.WriteInt64(s.Field, "field"); err != nil {
		return err
	}

	return nil
}