# copyright 2003-2011 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of logilab-common.
#
# logilab-common is free software: you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by the
# Free Software Foundation, either version 2.1 of the License,
# or (at your option) any later version.
#
# logilab-common is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with logilab-common.  If not, see <http://www.gnu.org/licenses/>.
"""HTML formatting drivers for ureports"""
__docformat__ = "restructuredtext en"


from logilab.common.ureports import BaseWriter
from logilab.common.ureports.nodes import (
    Section,
    Title,
    Table,
    List,
    Paragraph,
    Link,
    VerbatimText,
    Text,
)
from typing import Any


class HTMLWriter(BaseWriter):
    """format layouts as HTML"""

    def __init__(self, snippet: int = None) -> None:
        super(HTMLWriter, self).__init__()
        self.snippet = snippet

    def handle_attrs(self, layout: Any) -> str:
        """get an attribute string from layout member attributes"""
        attrs = ""
        klass = getattr(layout, "klass", None)
        if klass:
            attrs += f' class="{klass}"'
        nid = getattr(layout, "id", None)
        if nid:
            attrs += f' id="{nid}"'
        return attrs

    def begin_format(self, layout: Any) -> None:
        """begin to format a layout"""
        super(HTMLWriter, self).begin_format(layout)
        if self.snippet is None:
            self.writeln("<html>")
            self.writeln("<body>")

    def end_format(self, layout: Any) -> None:
        """finished to format a layout"""
        if self.snippet is None:
            self.writeln("</body>")
            self.writeln("</html>")

    def visit_section(self, layout: Section) -> None:
        """display a section as html, using div + h[section level]"""
        self.section += 1
        self.writeln(f"<div{self.handle_attrs(layout)}>")
        self.format_children(layout)
        self.writeln("</div>")
        self.section -= 1

    def visit_title(self, layout: Title) -> None:
        """display a title using <hX>"""
        self.write(f"<h{self.section}{self.handle_attrs(layout)}>")
        self.format_children(layout)
        self.writeln(f"</h{self.section}>")

    def visit_table(self, layout: Table) -> None:
        """display a table as html"""
        self.writeln(f"<table{self.handle_attrs(layout)}>")
        table_content = self.get_table_content(layout)
        for i in range(len(table_content)):
            row = table_content[i]
            if i == 0 and layout.rheaders:
                self.writeln('<tr class="header">')
            elif i + 1 == len(table_content) and layout.rrheaders:
                self.writeln('<tr class="header">')
            else:
                self.writeln('<tr class="%s">' % (i % 2 and "even" or "odd"))
            for j in range(len(row)):
                cell = row[j] or "&#160;"
                if (
                    (layout.rheaders and i == 0)
                    or (layout.cheaders and j == 0)
                    or (layout.rrheaders and i + 1 == len(table_content))
                    or (layout.rcheaders and j + 1 == len(row))
                ):
                    self.writeln(f"<th>{cell}</th>")
                else:
                    self.writeln(f"<td>{cell}</td>")
            self.writeln("</tr>")
        self.writeln("</table>")

    def visit_list(self, layout: List) -> None:
        """display a list as html"""
        self.writeln(f"<ul{self.handle_attrs(layout)}>")
        for row in list(self.compute_content(layout)):
            self.writeln(f"<li>{row}</li>")
        self.writeln("</ul>")

    def visit_paragraph(self, layout: Paragraph) -> None:
        """display links (using <p>)"""
        self.write("<p>")
        self.format_children(layout)
        self.write("</p>")

    def visit_span(self, layout):
        """display links (using <p>)"""
        self.write(f"<span{self.handle_attrs(layout)}>")
        self.format_children(layout)
        self.write("</span>")

    def visit_link(self, layout: Link) -> None:
        """display links (using <a>)"""
        self.write(f' <a href="{layout.url}"{self.handle_attrs(layout)}>{layout.label}</a>')

    def visit_verbatimtext(self, layout: VerbatimText) -> None:
        """display verbatim text (using <pre>)"""
        self.write("<pre>")
        self.write(layout.data.replace("&", "&amp;").replace("<", "&lt;"))
        self.write("</pre>")

    def visit_text(self, layout: Text) -> None:
        """add some text"""
        data = layout.data
        if layout.escaped:
            data = data.replace("&", "&amp;").replace("<", "&lt;")
        self.write(data)
