package logproto

import (
	"fmt"
	"io"
	"time"

	jsoniter "github.com/json-iterator/go"
	"github.com/prometheus/prometheus/promql/parser"
)

// Stream contains a unique labels set as a string and a set of entries for it.
// We are not using the proto generated version but this custom one so that we
// can improve serialization see benchmark.
type Stream struct {
	Labels  string  `protobuf:"bytes,1,opt,name=labels,proto3" json:"labels"`
	Entries []Entry `protobuf:"bytes,2,rep,name=entries,proto3,customtype=EntryAdapter" json:"entries"`
}

// MarshalJSON implements the json.Marshaler interface.
func (r *PushRequest) MarshalJSON() ([]byte, error) {
	stream := jsoniter.ConfigDefault.BorrowStream(nil)
	defer jsoniter.ConfigDefault.ReturnStream(stream)

	stream.WriteObjectStart()
	stream.WriteObjectField("streams")
	stream.WriteArrayStart()
	for i, s := range r.Streams {
		stream.WriteObjectStart()
		stream.WriteObjectField("stream")
		stream.WriteObjectStart()
		lbs, err := parser.ParseMetric(s.Labels)
		if err != nil {
			continue
		}
		for i, lb := range lbs {
			stream.WriteObjectField(lb.Name)
			stream.WriteStringWithHTMLEscaped(lb.Value)
			if i != len(lbs)-1 {
				stream.WriteMore()
			}
		}
		stream.WriteObjectEnd()
		stream.WriteMore()
		stream.WriteObjectField("values")
		stream.WriteArrayStart()
		for i, entry := range s.Entries {
			stream.WriteArrayStart()
			stream.WriteRaw(fmt.Sprintf(`"%d"`, entry.Timestamp.UnixNano()))
			stream.WriteMore()
			stream.WriteStringWithHTMLEscaped(entry.Line)
			stream.WriteArrayEnd()
			if i != len(s.Entries)-1 {
				stream.WriteMore()
			}
		}
		stream.WriteArrayEnd()
		stream.WriteObjectEnd()
		if i != len(r.Streams)-1 {
			stream.WriteMore()
		}
	}
	stream.WriteArrayEnd()
	stream.WriteObjectEnd()

	return stream.Buffer(), nil
}

// Entry is a log entry with a timestamp.
type Entry struct {
	Timestamp time.Time `protobuf:"bytes,1,opt,name=timestamp,proto3,stdtime" json:"ts"`
	Line      string    `protobuf:"bytes,2,opt,name=line,proto3" json:"line"`
}

func (m *Stream) Marshal() (dAtA []byte, err error) {
	size := m.Size()
	dAtA = make([]byte, size)
	n, err := m.MarshalTo(dAtA)
	if err != nil {
		return nil, err
	}
	return dAtA[:n], nil
}

func (m *Stream) MarshalTo(dAtA []byte) (int, error) {
	var i int
	_ = i
	var l int
	_ = l
	if len(m.Labels) > 0 {
		dAtA[i] = 0xa
		i++
		i = encodeVarintLogproto(dAtA, i, uint64(len(m.Labels)))
		i += copy(dAtA[i:], m.Labels)
	}
	if len(m.Entries) > 0 {
		for _, msg := range m.Entries {
			dAtA[i] = 0x12
			i++
			i = encodeVarintLogproto(dAtA, i, uint64(msg.Size()))
			n, err := msg.MarshalTo(dAtA[i:])
			if err != nil {
				return 0, err
			}
			i += n
		}
	}
	return i, nil
}

func (m *Entry) Marshal() (dAtA []byte, err error) {
	size := m.Size()
	dAtA = make([]byte, size)
	n, err := m.MarshalTo(dAtA)
	if err != nil {
		return nil, err
	}
	return dAtA[:n], nil
}

func (m *Entry) MarshalTo(dAtA []byte) (int, error) {
	var i int
	_ = i
	var l int
	_ = l
	dAtA[i] = 0xa
	i++
	i = encodeVarintLogproto(dAtA, i, uint64(SizeOfStdTime(m.Timestamp)))
	n5, err := StdTimeMarshalTo(m.Timestamp, dAtA[i:])
	if err != nil {
		return 0, err
	}
	i += n5
	if len(m.Line) > 0 {
		dAtA[i] = 0x12
		i++
		i = encodeVarintLogproto(dAtA, i, uint64(len(m.Line)))
		i += copy(dAtA[i:], m.Line)
	}
	return i, nil
}

func (m *Stream) Unmarshal(dAtA []byte) error {
	l := len(dAtA)
	iNdEx := 0
	for iNdEx < l {
		preIndex := iNdEx
		var wire uint64
		for shift := uint(0); ; shift += 7 {
			if shift >= 64 {
				return ErrIntOverflowLogproto
			}
			if iNdEx >= l {
				return io.ErrUnexpectedEOF
			}
			b := dAtA[iNdEx]
			iNdEx++
			wire |= uint64(b&0x7F) << shift
			if b < 0x80 {
				break
			}
		}
		fieldNum := int32(wire >> 3)
		wireType := int(wire & 0x7)
		if wireType == 4 {
			return fmt.Errorf("proto: Stream: wiretype end group for non-group")
		}
		if fieldNum <= 0 {
			return fmt.Errorf("proto: Stream: illegal tag %d (wire type %d)", fieldNum, wire)
		}
		switch fieldNum {
		case 1:
			if wireType != 2 {
				return fmt.Errorf("proto: wrong wireType = %d for field Labels", wireType)
			}
			var stringLen uint64
			for shift := uint(0); ; shift += 7 {
				if shift >= 64 {
					return ErrIntOverflowLogproto
				}
				if iNdEx >= l {
					return io.ErrUnexpectedEOF
				}
				b := dAtA[iNdEx]
				iNdEx++
				stringLen |= uint64(b&0x7F) << shift
				if b < 0x80 {
					break
				}
			}
			intStringLen := int(stringLen)
			if intStringLen < 0 {
				return ErrInvalidLengthLogproto
			}
			postIndex := iNdEx + intStringLen
			if postIndex < 0 {
				return ErrInvalidLengthLogproto
			}
			if postIndex > l {
				return io.ErrUnexpectedEOF
			}
			m.Labels = string(dAtA[iNdEx:postIndex])
			iNdEx = postIndex
		case 2:
			if wireType != 2 {
				return fmt.Errorf("proto: wrong wireType = %d for field Entries", wireType)
			}
			var msglen int
			for shift := uint(0); ; shift += 7 {
				if shift >= 64 {
					return ErrIntOverflowLogproto
				}
				if iNdEx >= l {
					return io.ErrUnexpectedEOF
				}
				b := dAtA[iNdEx]
				iNdEx++
				msglen |= int(b&0x7F) << shift
				if b < 0x80 {
					break
				}
			}
			if msglen < 0 {
				return ErrInvalidLengthLogproto
			}
			postIndex := iNdEx + msglen
			if postIndex < 0 {
				return ErrInvalidLengthLogproto
			}
			if postIndex > l {
				return io.ErrUnexpectedEOF
			}
			m.Entries = append(m.Entries, Entry{})
			if err := m.Entries[len(m.Entries)-1].Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
				return err
			}
			iNdEx = postIndex
		default:
			iNdEx = preIndex
			skippy, err := skipLogproto(dAtA[iNdEx:])
			if err != nil {
				return err
			}
			if skippy < 0 {
				return ErrInvalidLengthLogproto
			}
			if (iNdEx + skippy) < 0 {
				return ErrInvalidLengthLogproto
			}
			if (iNdEx + skippy) > l {
				return io.ErrUnexpectedEOF
			}
			iNdEx += skippy
		}
	}

	if iNdEx > l {
		return io.ErrUnexpectedEOF
	}
	return nil
}

func (m *Entry) Unmarshal(dAtA []byte) error {
	l := len(dAtA)
	iNdEx := 0
	for iNdEx < l {
		preIndex := iNdEx
		var wire uint64
		for shift := uint(0); ; shift += 7 {
			if shift >= 64 {
				return ErrIntOverflowLogproto
			}
			if iNdEx >= l {
				return io.ErrUnexpectedEOF
			}
			b := dAtA[iNdEx]
			iNdEx++
			wire |= uint64(b&0x7F) << shift
			if b < 0x80 {
				break
			}
		}
		fieldNum := int32(wire >> 3)
		wireType := int(wire & 0x7)
		if wireType == 4 {
			return fmt.Errorf("proto: Entry: wiretype end group for non-group")
		}
		if fieldNum <= 0 {
			return fmt.Errorf("proto: Entry: illegal tag %d (wire type %d)", fieldNum, wire)
		}
		switch fieldNum {
		case 1:
			if wireType != 2 {
				return fmt.Errorf("proto: wrong wireType = %d for field Timestamp", wireType)
			}
			var msglen int
			for shift := uint(0); ; shift += 7 {
				if shift >= 64 {
					return ErrIntOverflowLogproto
				}
				if iNdEx >= l {
					return io.ErrUnexpectedEOF
				}
				b := dAtA[iNdEx]
				iNdEx++
				msglen |= int(b&0x7F) << shift
				if b < 0x80 {
					break
				}
			}
			if msglen < 0 {
				return ErrInvalidLengthLogproto
			}
			postIndex := iNdEx + msglen
			if postIndex < 0 {
				return ErrInvalidLengthLogproto
			}
			if postIndex > l {
				return io.ErrUnexpectedEOF
			}
			if err := StdTimeUnmarshal(&m.Timestamp, dAtA[iNdEx:postIndex]); err != nil {
				return err
			}
			iNdEx = postIndex
		case 2:
			if wireType != 2 {
				return fmt.Errorf("proto: wrong wireType = %d for field Line", wireType)
			}
			var stringLen uint64
			for shift := uint(0); ; shift += 7 {
				if shift >= 64 {
					return ErrIntOverflowLogproto
				}
				if iNdEx >= l {
					return io.ErrUnexpectedEOF
				}
				b := dAtA[iNdEx]
				iNdEx++
				stringLen |= uint64(b&0x7F) << shift
				if b < 0x80 {
					break
				}
			}
			intStringLen := int(stringLen)
			if intStringLen < 0 {
				return ErrInvalidLengthLogproto
			}
			postIndex := iNdEx + intStringLen
			if postIndex < 0 {
				return ErrInvalidLengthLogproto
			}
			if postIndex > l {
				return io.ErrUnexpectedEOF
			}
			m.Line = string(dAtA[iNdEx:postIndex])
			iNdEx = postIndex
		default:
			iNdEx = preIndex
			skippy, err := skipLogproto(dAtA[iNdEx:])
			if err != nil {
				return err
			}
			if skippy < 0 {
				return ErrInvalidLengthLogproto
			}
			if (iNdEx + skippy) < 0 {
				return ErrInvalidLengthLogproto
			}
			if (iNdEx + skippy) > l {
				return io.ErrUnexpectedEOF
			}
			iNdEx += skippy
		}
	}

	if iNdEx > l {
		return io.ErrUnexpectedEOF
	}
	return nil
}

func (m *Stream) Size() (n int) {
	if m == nil {
		return 0
	}
	var l int
	_ = l
	l = len(m.Labels)
	if l > 0 {
		n += 1 + l + sovLogproto(uint64(l))
	}
	if len(m.Entries) > 0 {
		for _, e := range m.Entries {
			l = e.Size()
			n += 1 + l + sovLogproto(uint64(l))
		}
	}
	return n
}

func (m *Entry) Size() (n int) {
	if m == nil {
		return 0
	}
	var l int
	_ = l
	l = SizeOfStdTime(m.Timestamp)
	n += 1 + l + sovLogproto(uint64(l))
	l = len(m.Line)
	if l > 0 {
		n += 1 + l + sovLogproto(uint64(l))
	}
	return n
}

func (m *Stream) Equal(that interface{}) bool {
	if that == nil {
		return m == nil
	}

	that1, ok := that.(*Stream)
	if !ok {
		that2, ok := that.(Stream)
		if ok {
			that1 = &that2
		} else {
			return false
		}
	}
	if that1 == nil {
		return m == nil
	} else if m == nil {
		return false
	}
	if m.Labels != that1.Labels {
		return false
	}
	if len(m.Entries) != len(that1.Entries) {
		return false
	}
	for i := range m.Entries {
		if !m.Entries[i].Equal(that1.Entries[i]) {
			return false
		}
	}
	return true
}

func (m *Entry) Equal(that interface{}) bool {
	if that == nil {
		return m == nil
	}

	that1, ok := that.(*Entry)
	if !ok {
		that2, ok := that.(Entry)
		if ok {
			that1 = &that2
		} else {
			return false
		}
	}
	if that1 == nil {
		return m == nil
	} else if m == nil {
		return false
	}
	if !m.Timestamp.Equal(that1.Timestamp) {
		return false
	}
	if m.Line != that1.Line {
		return false
	}
	return true
}