// ------------------------------------------------------------------------
// 🚀 Project active3
// 🔗 Active Thing (activething.com) git.activething.com/go
//
//    File name  reflected_map.go
// ✍️ Created by DEV
// 📅 Modified   16/05/2024
//
// 🔒 Copyright 2024 activething.com
//  
// 📜 LICENSE --------------------------------------------------------------
// 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 pkjson

import (
	"apack"
	"apack/pstate"
	"cdcs/cjson"
	"reflect"
	"sort"
)

type (

	rMap		struct {
		keyFn	rMapEntryFnc
		packFn 	func(builder *Builder, value reflect.Value)
	}
)

func newRMap (rtype reflect.Type) *rMap {
	return &rMap{
		packFn: packReflected(rtype.Elem()),
		keyFn : g.keyStringer.getOrBuildStringer(rtype.Key()),
	}
}


func (m *rMap) pack (builder *Builder, value reflect.Value) {
	if m.keyFn == nil {
		builder.SetError(apack.G.ErrInvalidKey)
		return
	}

	if value.IsNil() {
		builder.B.W(cjson.G.NullValue)
		return
	}

	if builder.Level > maxCyclesAfter {
		if fn,ok := builder.CheckCycle(value.UnsafePointer()); ok {
			defer fn()
		} else {
			builder.SetError(apack.G.ErrRedundantPack)
			return
		}
	}

	mi := value.MapRange()
	ls := make(rMapEntries,value.Len())

	for i:=0; mi.Next(); i++ {
		ls[i]=rMapEntry{
			v: mi.Value(),
		}
		if er := m.keyFn(&ls[i],mi.Key()); er != nil {
			builder.SetError(er)
			return
		}
	}

	sort.Sort(ls)

	builder.makeLevel(pstate.ModeMap,false,len(ls)==0,func (b *Builder){
		for i:=0; i<len(ls); i++ {
			b.writeSepIf(i>0)
			b.packString(ls[i].k,0)
			//b.B.WriteString(ls[i].k)
			b.B.WriteByte(':')
			b.Current.IsValue = true
			m.packFn(b,ls[i].v)
			if b.Err != nil {
				return
			}
		}
	})

}