"""Generates PDF cards from a calibre metadata.db."""

from calibrestekje import Book, Comment, Publisher, init_session
from reportlab.lib.pagesizes import *
from reportlab.lib.styles import ParagraphStyle, getSampleStyleSheet
from reportlab.pdfgen import canvas
from reportlab.platypus import PageBreak, Paragraph, SimpleDocTemplate, Spacer


def make_cards():
    """The main entrypoint for card generation."""
    # TODO: thread arguments into this logic
    doc = create_doc("text.pdf")
    content = get_fields(doc)
    doc.build(content)


def get_fields():
    """Retrieve fields from the metadata."""
    content = []
    styles = getSampleStyleSheet()
    session = init_session("sqlite:///metadata.db")

    for book in session.query(Book).all():
        ptitle = Paragraph(
            "<font size=12>{}</font>".format(book.title), styles["Italic"]
        )
        ptime = Paragraph(
            "<font size=10>Uploaded: {}</font>".format(book.timestamp), styles["Normal"]
        )
        pcomments = Paragraph("<font size=10>{}</font>".format(comment.text))

        format_string = "<font size=12>{}</font>"
        all_authors = [author.name for author in book.authors]
        glued_together = format_string.format(", ".join(all_authors))

        format_string = "<font size=10>{}</font>"
        all_tags = [tag.name for tag in book.tags]
        tags_glued_together = format_string.format(", ".join(all_tags))

        content.append(ptitle)
        content.append(Spacer(1, 12))
        content.append(ptime)
        content.append(Spacer(1, 12))
        content.append(pcomments)

        p = Paragraph(glued_together, styles["Normal"])
        content.append(p)
        content.append(PageBreak())
        content.append(Spacer(6, 12))

        p = Paragraph(tags_glued_together, styles["Normal"])
        content.append(p)
        content.append(PageBreak())
        content.append(Spacer(6, 12))

    return content


def create_doc(filename):
    """Build the Report Lab document template."""
    return SimpleDocTemplate(
        filename,
        pagesize=landscape(A6),
        rightMargin=18,
        leftMargin=18,
        topMargin=0,
        bottomMargin=18,
    )