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* 书籍类型配置（黄金数 φ=1.618，基数13万）
* 规模值为精确字数，AI 生成时自行理解 ±20% 浮动
*/
// 通用浮动比例（可调整）
export const FLOAT_RATIO = 0.2; // 20%
// AI 生成时字数上限（基数 × 1.2）
export const getWordUpperLimit = (baseWords: number): number => {
return Math.round(baseWords * (1 + FLOAT_RATIO));
};
// 每章字数浮动比例（可调整）
export const CHAPTER_WORDS_FLOAT_RATIO = 0.5; // 50%
// 章节数浮动范围（根据 FLOAT_RATIO 计算，允许 ±20%）
export const getChapterRange = (targetChapters: number): { min: number; max: number } => {
return {
min: Math.floor(targetChapters * (1 - FLOAT_RATIO)),
max: Math.ceil(targetChapters * (1 + FLOAT_RATIO)),
};
};
// 根据总字数计算章节数（每章约 2千 字，可调整）
const WORDS_PER_CHAPTER = 2000;
export const calcChapters = (totalWords: number): number => {
return Math.max(1, Math.round(totalWords / WORDS_PER_CHAPTER));
};
// 每章字数浮动范围
export const getChapterWordsRange = (baseWords: number = WORDS_PER_CHAPTER): { min: number; max: number } => {
return {
min: Math.round(baseWords * (1 - CHAPTER_WORDS_FLOAT_RATIO)),
max: Math.round(baseWords * (1 + CHAPTER_WORDS_FLOAT_RATIO)),
};
};
// 每分钟音频对应的文本字数（可调整）
const WORDS_PER_MINUTE = 200;
// 根据总字数计算音频时长（分钟）
export const calcAudioMinutes = (totalWords: number): number => {
return Math.round(totalWords / WORDS_PER_MINUTE);
};
export interface BookTypeConfig {
key: string;
label: string;
description: string;
chapters: number;
totalWords: number;
chapterWords: number;
audioMinutes: number;
structureFormat: string;
readingDifficulty: string;
isShortArticle: boolean;
}
// 音频分钟数计算：totalWords / 200
export const BOOK_TYPE_CONFIG: Record<string, BookTypeConfig> = {
'340000': { key: '340000', label: '上2', description: '上2，约34万字', chapters: calcChapters(340000), totalWords: 340000, chapterWords: 9700, audioMinutes: calcAudioMinutes(340000), structureFormat: '单章完整', readingDifficulty: '高', isShortArticle: false },
'210000': { key: '210000', label: '上1', description: '上1，约21万字', chapters: calcChapters(210000), totalWords: 210000, chapterWords: 7800, audioMinutes: calcAudioMinutes(210000), structureFormat: '单章完整', readingDifficulty: '中高', isShortArticle: false },
'130000': { key: '130000', label: '标准', description: '标准，约13万字', chapters: calcChapters(130000), totalWords: 130000, chapterWords: 7600, audioMinutes: calcAudioMinutes(130000), structureFormat: '单章完整', readingDifficulty: '中', isShortArticle: false },
'80000': { key: '80000', label: '下1', description: '下1，约8万字', chapters: calcChapters(80000), totalWords: 80000, chapterWords: 6700, audioMinutes: calcAudioMinutes(80000), structureFormat: '单章完整', readingDifficulty: '中低', isShortArticle: false },
'50000': { key: '50000', label: '下2', description: '下2，约5万字', chapters: calcChapters(50000), totalWords: 50000, chapterWords: 5600, audioMinutes: calcAudioMinutes(50000), structureFormat: '单章完整', readingDifficulty: '低', isShortArticle: false },
'31000': { key: '31000', label: '下3', description: '下3，约3.1万字', chapters: calcChapters(31000), totalWords: 31000, chapterWords: 4400, audioMinutes: calcAudioMinutes(31000), structureFormat: '单章完整', readingDifficulty: '低', isShortArticle: false },
'19000': { key: '19000', label: '下4', description: '下4，约1.9万字', chapters: calcChapters(19000), totalWords: 19000, chapterWords: 3800, audioMinutes: calcAudioMinutes(19000), structureFormat: '单章完整', readingDifficulty: '低', isShortArticle: false },
'12000': { key: '12000', label: '下5', description: '下5，约1.2万字', chapters: calcChapters(12000), totalWords: 12000, chapterWords: 3000, audioMinutes: calcAudioMinutes(12000), structureFormat: '单章完整', readingDifficulty: '低', isShortArticle: false },
'7000': { key: '7000', label: '下6', description: '下6，约7千字', chapters: calcChapters(7000), totalWords: 7000, chapterWords: 2300, audioMinutes: calcAudioMinutes(7000), structureFormat: '全文', readingDifficulty: '极低', isShortArticle: true },
'4000': { key: '4000', label: '下7', description: '下7，约4千字', chapters: calcChapters(4000), totalWords: 4000, chapterWords: 2000, audioMinutes: calcAudioMinutes(4000), structureFormat: '全文', readingDifficulty: '极低', isShortArticle: true },
'3000': { key: '3000', label: '下8', description: '下8，约3千字', chapters: calcChapters(3000), totalWords: 3000, chapterWords: 3000, audioMinutes: calcAudioMinutes(3000), structureFormat: '全文', readingDifficulty: '极低', isShortArticle: true },
'2000': { key: '2000', label: '下9', description: '下9，约2千字', chapters: calcChapters(2000), totalWords: 2000, chapterWords: 2000, audioMinutes: calcAudioMinutes(2000), structureFormat: '全文', readingDifficulty: '极低', isShortArticle: true },
'1000': { key: '1000', label: '下10', description: '下10，约1千字', chapters: calcChapters(1000), totalWords: 1000, chapterWords: 1000, audioMinutes: calcAudioMinutes(1000), structureFormat: '全文', readingDifficulty: '极低', isShortArticle: true },
};
// 可被 AI 自动检测的类型
export const DETECTABLE_TYPES = ['340000', '210000', '130000', '80000', '50000', '31000', '19000', '12000', '7000', '4000', '3000', '2000', '1000'];
// 获取单个类型配置
export function getBookTypeConfig(key: string): BookTypeConfig {
// 如果 key 是数字字符串（如 '200', '3000'），直接计算
if (/^\d+$/.test(key)) {
const wordCount = parseInt(key);
return {
key: key,
label: '自定义',
description: `约${wordCount}字`,
chapters: calcChapters(wordCount),
totalWords: wordCount,
chapterWords: calcChapterWords(wordCount),
audioMinutes: calcAudioMinutes(wordCount),
structureFormat: '单章完整',
readingDifficulty: '中',
isShortArticle: wordCount <= 10000,
};
}
return BOOK_TYPE_CONFIG[key] || BOOK_TYPE_CONFIG['130000'];
}
// 根据字数计算每章字数
const calcChapterWords = (totalWords: number): number => {
return Math.round(totalWords / calcChapters(totalWords));
};
// 获取所有类型配置（供前端显示）
export function getAllBookTypes(): BookTypeConfig[] {
return Object.values(BOOK_TYPE_CONFIG);
}
// 获取可检测的类型列表
export function getDetectableTypes(): BookTypeConfig[] {
return DETECTABLE_TYPES.map(key => BOOK_TYPE_CONFIG[key]);
}
// 兼容旧接口的 getScaleConfig（返回单个值，AI自行理解±20%浮动）
export function getScaleConfig(key: string) {
const config = getBookTypeConfig(key);
return {
chapters: config.chapters,
totalWords: config.totalWords,
chapterWords: config.chapterWords,
isShortArticle: config.isShortArticle,
};
}
// 兼容旧接口的 estimateBookWords
export function estimateBookWords(key: string): { min: number; max: number; avg: number } {
const config = getBookTypeConfig(key);
return {
min: config.totalWords,
max: config.totalWords,
avg: config.totalWords,
};
}
// ============================================
// 字数安全限制（三层防护体系）
// ============================================
/** 全局绝对上限：50 万字
* 前端最大可选为「上2」34 万字，×1.5 安全系数 = 51 万，取整 50 万
* 任何用户/任何类型均不可突破 */
export const GLOBAL_ABSOLUTE_WORD_LIMIT = 500_000;
/**
* 获取全局字数上限
* 与类型/会员等级无关，所有用户统一硬上限 50 万字
* 用户有多少余额就能写多少字，但不得超过此上限
*/
export function getBookWordLimit(): number {
return GLOBAL_ABSOLUTE_WORD_LIMIT;
}
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