import Foundation

@Observable
final class SearchViewModel {
    var query = ""
    var results: [ContentItem] = []
    var isSearching = false
    var isLoadingMore = false
    var currentPage = 1
    var totalPages = 1
    var error: String?
    var hasSearched = false

    @MainActor
    func search() async {
        let trimmed = query.trimmingCharacters(in: .whitespacesAndNewlines)
        guard !trimmed.isEmpty else { return }

        isSearching = true
        error = nil
        hasSearched = true
        currentPage = 1
        totalPages = 1
        results = []

        do {
            let html = try await APIClient.shared.fetchSearchPage(query: trimmed)
            let items = try HTMLParser.parseContentList(html: html)
            let pagination = try HTMLParser.parsePagination(html: html)

            self.results = items
            self.currentPage = pagination.current
            self.totalPages = pagination.total
        } catch is CancellationError {
        } catch let error as URLError where error.code == .cancelled {
        } catch {
            self.error = error.localizedDescription
        }

        isSearching = false
    }

    @MainActor
    func loadMore() async {
        guard !isSearching, !isLoadingMore, currentPage < totalPages else { return }
        isLoadingMore = true

        let nextPage = currentPage + 1
        do {
            let html = try await APIClient.shared.fetchSearchPage(query: query, page: nextPage)
            let items = try HTMLParser.parseContentList(html: html)
            let pagination = try HTMLParser.parsePagination(html: html)

            self.results.append(contentsOf: items)
            self.currentPage = pagination.current
            self.totalPages = pagination.total
        } catch is CancellationError {
        } catch let error as URLError where error.code == .cancelled {
        } catch {
            // 静默处理
        }

        isLoadingMore = false
    }

    @MainActor
    func clear() {
        query = ""
        results = []
        hasSearched = false
        error = nil
        currentPage = 1
        totalPages = 1
    }
}