import { API_BASE_URL, requestJson } from '@/services/api.uts'

export type ContentSection = { id: string, title: string, body: string }
export type NewsArticle = { id: string, title: string, summary: string, category: string, date: string, source: string, readingTime: string, image: string, sections: ContentSection[] }
export type FinanceLesson = { id: string, title: string, desc: string, duration: string, tag: string, image: string, intro: string, topics: string[], chapters: ContentSection[], chapterCount: number, lessonVersion: string }
export type ArticlePage = { items: NewsArticle[], total: number, hasMore: boolean }
export type LessonPage = { items: FinanceLesson[], total: number, hasMore: boolean }
export type LessonState = { lessonVersion: string, completedChapterIds: string[] }
export type ContentHome = { lessons: FinanceLesson[], articles: NewsArticle[] }
export type ContentSearchResult = { id: string, type: string, title: string, summary: string, category: string, meta: string, image: string }
export type SearchPage = { items: ContentSearchResult[], total: number, hasMore: boolean }

function imageUrl(value: string): string {
    // 随包图片保留本地路径，后台上传的封面从接口站点读取。
    if (value.startsWith('/uploads/')) return API_BASE_URL.replace('/api/v1', '') + value
    return value
}
function sections(value: UTSJSONObject[]): ContentSection[] {
    return value.map((item: UTSJSONObject): ContentSection => ({ id: item.getString('id') ?? '', title: item.getString('title') ?? '', body: item.getString('body') ?? '' }))
}
function articleFrom(data: UTSJSONObject): NewsArticle {
    return { id: data.getString('id') ?? '', title: data.getString('title') ?? '', summary: data.getString('summary') ?? '', category: data.getString('category') ?? '',
        date: data.getString('date') ?? '', source: data.getString('source') ?? '', readingTime: data.getString('readingTime') ?? '', image: imageUrl(data.getString('image') ?? ''),
        sections: sections(data['sections'] as UTSJSONObject[]) }
}
function lessonFrom(data: UTSJSONObject): FinanceLesson {
    return { id: data.getString('id') ?? '', title: data.getString('title') ?? '', desc: data.getString('desc') ?? '', duration: data.getString('duration') ?? '', tag: data.getString('tag') ?? '',
        image: imageUrl(data.getString('image') ?? ''), intro: data.getString('intro') ?? '', topics: data['topics'] as string[], chapters: sections(data['chapters'] as UTSJSONObject[]),
        chapterCount: data.getNumber('chapterCount') ?? 0, lessonVersion: data.getString('lessonVersion') ?? '' }
}
export async function fetchArticles(category: string, page: number = 1): Promise<ArticlePage> {
    const data = await requestJson('/content/articles', 'GET', { category, page, pageSize: 20 })
    return { items: (data['items'] as UTSJSONObject[]).map((item: UTSJSONObject): NewsArticle => articleFrom(item)), total: data.getNumber('total') ?? 0, hasMore: data.getBoolean('hasMore') ?? false }
}
export async function fetchArticle(id: string): Promise<NewsArticle> { return articleFrom(await requestJson('/content/articles/' + encodeURIComponent(id), 'GET', {})) }
export async function fetchLessons(topic: string, page: number = 1): Promise<LessonPage> {
    const data = await requestJson('/content/lessons', 'GET', { topic, page, pageSize: 20 })
    return { items: (data['items'] as UTSJSONObject[]).map((item: UTSJSONObject): FinanceLesson => lessonFrom(item)), total: data.getNumber('total') ?? 0, hasMore: data.getBoolean('hasMore') ?? false }
}
export async function fetchLesson(id: string): Promise<FinanceLesson> { return lessonFrom(await requestJson('/content/lessons/' + encodeURIComponent(id), 'GET', {})) }
function stateFrom(data: UTSJSONObject): LessonState { return { lessonVersion: data.getString('lessonVersion') ?? '', completedChapterIds: data['completedChapterIds'] as string[] } }
export async function fetchLessonProgress(id: string): Promise<LessonState> { return stateFrom(await requestJson('/content/lessons/' + id + '/progress', 'GET', {})) }
export async function completeLessonChapter(id: string, chapterId: string, lessonVersion: string): Promise<LessonState> {
    return stateFrom(await requestJson('/content/lessons/' + id + '/progress', 'PUT', { chapterId, lessonVersion, completed: true }))
}
export async function fetchContentHome(): Promise<ContentHome> {
    const data = await requestJson('/content/home', 'GET', {})
    return { lessons: (data['lessons'] as UTSJSONObject[]).map((item: UTSJSONObject): FinanceLesson => lessonFrom(item)), articles: (data['articles'] as UTSJSONObject[]).map((item: UTSJSONObject): NewsArticle => articleFrom(item)) }
}
export async function searchContent(keyword: string, type: string, page: number = 1): Promise<SearchPage> {
    const data = await requestJson('/content/search', 'GET', { keyword, type, page, pageSize: 20 })
    const items = (data['items'] as UTSJSONObject[]).map((item: UTSJSONObject): ContentSearchResult => ({
        id: item.getString('id') ?? '', type: item.getString('type') ?? '', title: item.getString('title') ?? '', summary: item.getString('summary') ?? '',
        category: item.getString('category') ?? '', meta: item.getString('meta') ?? '', image: imageUrl(item.getString('image') ?? '') }))
    return { items, total: data.getNumber('total') ?? 0, hasMore: data.getBoolean('hasMore') ?? false }
}
export function emptyArticle(): NewsArticle { return { id: '', title: '', summary: '', category: '', date: '', source: '', readingTime: '', image: '', sections: [] } }
export function emptyLesson(): FinanceLesson { return { id: '', title: '', desc: '', duration: '', tag: '', image: '', intro: '', topics: [], chapters: [], chapterCount: 0, lessonVersion: '' } }