/**
 * TypeScript interfaces (copied from lib/models for type safety)
 */

export interface ChapterContent {
    version: number;
    content: string;
    wordsCount: number;
}

export interface ChapterProps {
    chapterId: string;
    chapterOrder: number;
    title: string;
    chapterContent: ChapterContent;
}

export interface ActChapter {
    chapterInfoId: string;
    chapterId: string;
    title: string;
    chapterOrder: number;
    actId: number;
    incidentId?: string;
    plotPointId?: string;
    summary: string;
    goal: string;
}

/**
 * Database row types (snake_case from SQLite)
 */
export interface DBChapter {
    chapter_id: string;
    book_id: string;
    author_id: string;
    title: string;
    hashed_title?: string;
    words_count?: number;
    chapter_order?: number;
    meta_chapter: string;
    synced?: number;
}

export interface DBChapterContent {
    content_id: string;
    chapter_id: string;
    author_id: string;
    version: number;
    content: string;
    words_count: number;
    meta_chapter_content: string;
    time_on_it: number;
    synced?: number;
}

export interface DBChapterInfo {
    chapter_info_id: string;
    chapter_id?: string;
    act_id?: number;
    incident_id?: string;
    plot_point_id?: string;
    book_id?: string;
    author_id?: string;
    summary: string;
    goal: string;
    meta_chapter_info: string;
    synced?: number;
}

/**
 * MAPPERS: DB → TypeScript Interfaces
 */

export function dbToChapter(dbChapter: DBChapter, dbContent?: DBChapterContent): ChapterProps {
    const chapterContent: ChapterContent = dbContent ? {
        version: dbContent.version,
        content: dbContent.content,
        wordsCount: dbContent.words_count
    } : {
        version: 2,
        content: '',
        wordsCount: 0
    };

    return {
        chapterId: dbChapter.chapter_id,
        chapterOrder: dbChapter.chapter_order || 0,
        title: dbChapter.title,
        chapterContent
    };
}

export function dbToChapterContent(dbContent: DBChapterContent): ChapterContent {
    return {
        version: dbContent.version,
        content: dbContent.content,
        wordsCount: dbContent.words_count
    };
}

export function dbToActChapter(dbChapter: DBChapter, dbInfo: DBChapterInfo): ActChapter {
    return {
        chapterInfoId: dbInfo.chapter_info_id,
        chapterId: dbChapter.chapter_id,
        title: dbChapter.title,
        chapterOrder: dbChapter.chapter_order || 0,
        actId: dbInfo.act_id || 0,
        incidentId: dbInfo.incident_id,
        plotPointId: dbInfo.plot_point_id,
        summary: dbInfo.summary,
        goal: dbInfo.goal
    };
}

/**
 * MAPPERS: TypeScript Interfaces → DB
 */

export function chapterToDb(chapter: ChapterProps, bookId: string, authorId: string, synced: number = 0): DBChapter {
    return {
        chapter_id: chapter.chapterId,
        book_id: bookId,
        author_id: authorId,
        title: chapter.title,
        hashed_title: '',
        words_count: chapter.chapterContent.wordsCount,
        chapter_order: chapter.chapterOrder,
        meta_chapter: '',
        synced
    };
}

export function chapterContentToDb(
    content: ChapterContent,
    contentId: string,
    chapterId: string,
    authorId: string,
    timeOnIt: number = 0,
    synced: number = 0
): DBChapterContent {
    return {
        content_id: contentId,
        chapter_id: chapterId,
        author_id: authorId,
        version: content.version,
        content: content.content,
        words_count: content.wordsCount,
        meta_chapter_content: '',
        time_on_it: timeOnIt,
        synced
    };
}

export function actChapterToDbInfo(
    actChapter: ActChapter,
    bookId: string,
    authorId: string,
    synced: number = 0
): DBChapterInfo {
    return {
        chapter_info_id: actChapter.chapterInfoId,
        chapter_id: actChapter.chapterId,
        act_id: actChapter.actId,
        incident_id: actChapter.incidentId,
        plot_point_id: actChapter.plotPointId,
        book_id: bookId,
        author_id: authorId,
        summary: actChapter.summary,
        goal: actChapter.goal,
        meta_chapter_info: '',
        synced
    };
}