# ============================================================
# File: scraper/book_scraper.py
# Purpose:
#   Backwards-compatible wrapper giving the SAME public API
#   as the old BookScraper, but internally uses ScrapeEngine.
#
#   execute() → full metadata + chapterlist (NO book_idx creation)
#
#   ID management is now handled exclusively by InitService.
# ============================================================

from scraper.logger_decorators import logcall
from scraper.services.scrape_engine import ScrapeEngine


class BookScraper:
    """
    Backwards-compatible BookScraper façade.

    Old responsibilities (metadata, chapters, covers, downloads)
    are now split:

        ScrapeEngine → metadata + chapterlist
        Download tasks → handle download/parse/save
        InitService → determines book_idx (single source of truth)

    This wrapper intentionally does NOT generate a book_idx or book_id.
    It only returns metadata/chapters in legacy-compatible dict format.
    """

    @logcall
    def __init__(self, site_scraper, url: str):
        self.site = site_scraper
        self.url = url

    @logcall
    def execute(self):
        """
        Legacy public API:
            Return metadata + chapter list EXACTLY as before,
            but without generating any book_id.
        """

        data = ScrapeEngine.fetch_metadata_and_chapters(self.site, self.url)

        # Legacy structure preserved, unchanged:
        return {
            "title": data.get("title"),
            "author": data.get("author"),
            "description": data.get("description"),
            "cover_url": data.get("cover_url"),
            "chapters": data.get("chapters", []),
            "chapters_total": data.get("chapters_total", 0),
            "book_url": data.get("book_url"),  # used later by parse/save tasks
        }