// ------------------------------------------------------------------------
//   Project atila
//   Active Thing (activething.com) git.activething.com/go
//
//   File name  m.go
//   Created by DEV
//   Modified   16/01/2024
//
//   Copyright 2024 activething.com
// ------------------------------------------------------------------------
// 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 __packs

import (
	"activething.com/go/gogo/core/errs"
	"activething.com/go/gogo/core/syncs"
	"reflect"
	"time"
)

var (

	G = struct {

		poolsSem  		  uint32
		statePool 		  *syncs.Pool[State]
		nodePool 		  *syncs.Pool[StateNode]

		ErrInvalidNode    errs.ErrCode
		ErrInvalidElement errs.ErrCode
		ErrInvalidKey     errs.ErrCode
		ErrDuplicatedKey  errs.ErrCode
		ErrKeyRequired    errs.ErrCode
		ErrValueRequired  errs.ErrCode
		ErrInvalidList    errs.ErrCode
		ErrRedundantPack  errs.ErrCode
	}{
		ErrInvalidNode	 : errs.ErrCode("packs.invalid-StateNode"),
		ErrInvalidElement: errs.ErrCode("packs.invalid-element"),
		ErrInvalidKey	 : errs.ErrCode("packs.invalid-key"),
		ErrDuplicatedKey : errs.ErrCode("packs:duplicated-key"),
		ErrKeyRequired   : errs.ErrCode("packs:key-required"),
		ErrValueRequired : errs.ErrCode("packs:value-required"),
		ErrInvalidList   : errs.ErrCode("packs:invalid-list"),
		ErrRedundantPack : errs.ErrCode("packs:redundant-pack"),
	}
)






func BuildAny(builder Builder, value any, def func(value any) error) {

	switch tp := value.(type) {

	case Packabler: builder.SetError(tp.BuildPack(builder))

	case error	: builder.String(tp.Error())

	case string	: builder.String(tp)
	case bool   : builder.Bool  (tp)

	case int	: builder.Int64(int64(tp))
	case int8	: builder.Int8 (tp)
	case int16  : builder.Int16(tp)
	case int32	: builder.Int32(tp)
	case int64	: builder.Int64(tp)

	case uint   : builder.UInt64(uint64(tp))
	case uint8  : builder.UInt8 (tp)
	case uint16 : builder.UInt16(tp)
	case uint32 : builder.UInt32(tp)
	case uint64 : builder.UInt64(tp)

	case float32: builder.Float32(tp)
	case float64: builder.Float64(tp)

	case complex64 : builder.Complex64 (tp)
	case complex128: builder.Complex128(tp)

	case time.Time    : builder.Date(tp)
	case time.Duration: builder.Int64(int64(tp))

	case reflect.Value:
		switch tp.Kind() {
		case reflect.Slice,
			reflect.Array  : packList  (builder,value)
		case reflect.Map   : packMapReflected   (builder,tp)
		case reflect.Struct: packObjectReflected(builder,tp)
		default:
			builder.SetError(def(value))
		}

	default:
		rf := reflect.ValueOf(value)
		switch rf.Kind() {
		case reflect.Slice,
			reflect.Array  : packList		    (builder,value)
		case reflect.Map   : packMapReflected   (builder,rf)
		case reflect.Struct: packObjectReflected(builder,rf)
		}
		BuildAny(builder,reflect.ValueOf(value),def)
	}
}






func packListReflected(builder Builder, value reflect.Value) {
	builder.List(func (p BuilderList) {
		r := value
		for i:=0; i<r.Len(); i++ {
			p.ItemAny(r.Index(i).Interface())
			if builder.Error() != nil {
				return
			}
		}
	})
}

func packMapReflected(builder Builder, value reflect.Value) {
	value.Type().Elem().Key().Kind()
	builder.Map(func (p BuilderMap) {
		r := value
		for _,k := range r.MapKeys() {
			p.ElemAny(k.Interface(),r.MapIndex(k).Interface())
			if builder.Error() != nil {
				return
			}
		}
	})
}

func packObjectReflected(builder Builder, value reflect.Value) {
	builder.Object(func (p BuilderObject) {
		r := value
		t := r.Type()
		for i:=0; i < r.NumField(); i++ {
			if t.Field(i).IsExported() {
				p.PropAny(t.Field(i).Name,r.Field(i).Interface())
				if builder.Error() != nil {
					return
				}
			}
		}
	})
}


func _packList[T any ] (builder Builder, values []T, call func(BuilderList,T)) {
	builder.List(func (p BuilderList)  {
		for _,v := range values {
			call(p,v)
			if builder.Error() != nil {
				return
			}
		}
	})
}


func packList(builder Builder, value any) {
	switch tp := value.(type)  {

	case []string	 : _packList[string](builder,tp, func (b BuilderList, v string) { b.ItemString(v) })
	case []bool  	 : _packList[bool  ](builder,tp, func (b BuilderList, v bool  ) { b.ItemBool  (v) })
	case []int8  	 : _packList[int8  ](builder,tp, func (b BuilderList, v int8  ) { b.ItemInt8  (v) })
	case []int16 	 : _packList[int16 ](builder,tp, func (b BuilderList, v int16 ) { b.ItemInt16 (v) })
	case []int32 	 : _packList[int32 ](builder,tp, func (b BuilderList, v int32 ) { b.ItemInt32 (v) })
	case []int64 	 : _packList[int64 ](builder,tp, func (b BuilderList, v int64 ) { b.ItemInt64 (v) })
	case []uint8 	 : _packList[uint8 ](builder,tp, func (b BuilderList, v uint8 ) { b.ItemUInt8 (v) })
	case []uint16	 : _packList[uint16](builder,tp, func (b BuilderList, v uint16) { b.ItemUInt16(v) })
	case []uint32	 : _packList[uint32](builder,tp, func (b BuilderList, v uint32) { b.ItemUInt32(v) })
	case []uint64	 : _packList[uint64](builder,tp, func (b BuilderList, v uint64) { b.ItemUInt64(v) })

	case []float32	 : _packList[float32](builder,tp, func (b BuilderList, v float32) { b.ItemFloat32(v) })
	case []float64	 : _packList[float64](builder,tp, func (b BuilderList, v float64) { b.ItemFloat64(v) })

	case []complex64 : _packList[complex64] (builder,tp, func (b BuilderList, v complex64 ) { b.ItemComplex64 (v) })
	case []complex128: _packList[complex128](builder,tp, func (b BuilderList, v complex128) { b.ItemComplex128(v) })

	case []time.Time : _packList[time.Time] (builder,tp, func (b BuilderList, v time.Time) { b.ItemDate(v) })

	case []time.Duration: _packList[time.Duration](builder,tp, func (b BuilderList, v time.Duration ) { b.ItemInt64 (int64(v)) })

	case []any: _packList[any](builder,tp,func (b BuilderList, v any ) { b.ItemAny (v) })

	case reflect.Value:
		if tp.Type().Kind() != reflect.Slice && tp.Type().Kind() != reflect.Array {
			builder.SetError(G.ErrInvalidList)
			return
		}
		packListReflected(builder,tp)
	default:
		packListReflected(builder,reflect.ValueOf(value))
	}
}