// Copyright 2025-2026 肖其顿 (XIAO QI DUN)
//
// 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 ofdgo

import (
	"context"
	"encoding/xml"
	"fmt"
	"maps"
	"slices"
)

// addOwnedVector 将本库生成的独立对象注册为标准矢量资源，不保留内联复合内容
// 入参: ctx 取消上下文, objects 无原文和标识的对象, width 资源宽度, height 资源高度
// 返回: string 资源编号, error 校验、编码或取消错误
func (e *Editor) addOwnedVector(ctx context.Context, objects []GraphicObject, width, height float64) (string, error) {
	return (&editorValidation{Editor: e}).addOwnedVector(ctx, objects, width, height)
}

// addOwnedVector 在资源不变的构建会话内登记矢量资源，复用资源校验结果
// 入参: ctx 取消上下文, objects 无原文和标识的对象, width 资源宽度, height 资源高度
// 返回: string 资源编号, error 校验、编码或取消错误
func (v *editorValidation) addOwnedVector(ctx context.Context, objects []GraphicObject, width, height float64) (string, error) {
	e := v.Editor
	if !finite(width) || !finite(height) || width < 0 || height < 0 {
		return "", fmt.Errorf("invalid vector dimensions")
	}
	for index, object := range objects {
		if err := ctx.Err(); err != nil {
			return "", err
		}
		prepared, err := v.prepareObject(e.nextID(), object)
		if err != nil {
			return "", err
		}
		objects[index] = prepared
	}
	id := e.nextID()
	name := e.packageName("Res/Composites/Composite_" + id + ".xml")
	scan := &editorReferenceScan{refs: &editorResourceRefs{ids: make(map[string]bool), files: make(map[string]bool), fonts: make(map[string]*editorFontUsage)}, objects: make(map[string]bool), name: name, safe: true}
	data, err := encodeOFDXMLContext(ctx, func(x *ofdXML) {
		x.references = scan
		x.root("Res", ofdAttrs{{Name: xml.Name{Local: "BaseLoc"}, Value: "."}})
		x.start("CompositeGraphicUnits", nil)
		x.start("CompositeGraphicUnit", ofdAttrs{{Name: xml.Name{Local: "ID"}, Value: id},
			{Name: xml.Name{Local: "Width"}, Value: ofdNumber(width)}, {Name: xml.Name{Local: "Height"}, Value: ofdNumber(height)}})
		x.start("Content", nil)
		for _, object := range objects {
			if err := ctx.Err(); err != nil {
				x.err = err
				return
			}
			x.object(object, false)
		}
		x.end("Content")
		x.end("CompositeGraphicUnit")
		x.end("CompositeGraphicUnits")
		x.end("Res")
	})
	if err != nil {
		return "", err
	}
	resource := editorResource{name: name, data: data, composite: id}
	if scan.safe && scan.seen && len(scan.stack) == 0 {
		resource.references = slices.Sorted(maps.Keys(scan.objects))
		resource.usage = scan.vectorUsage(data)
	} else {
		resource, err = e.compositeResource(id, data)
		if err != nil {
			return "", err
		}
	}
	e.resources = append(e.resources, resource)
	if v.vectors == nil {
		v.vectors = make(map[string]bool)
	}
	v.vectors[id] = true
	return id, ctx.Err()
}