import re
import textwrap
import pprint

import klammer_base
import phases
import kutil
import latex_util
import html_util
from html_util import E
import color

class Indent(klammer_base.Klammer_base):
    """An indented block (@indent).  :left and :right are widths: a bare
    number is characters in every target (2026-09-16); :right defaults to
    :left."""
    def __init__(self, K):
        super().__init__(K)
        if not self.right:
            self.right = self.left

    def html(self):
        text_align = "justify" if not self.ragged else "left"
        left = kutil.parse_width("html", self.left)[0]
        right = kutil.parse_width("html", self.right)[0]
        return E("div").body(self.s)\
                       .sty("margin", f"0.5rem {right} 0.5rem {left}")\
                       .sty("text-align", text_align)\
                       .str()
    def tex(self):
        if self.ragged:
            self.s = "\\raggedright " + self.s
        left = kutil.parse_width("tex", self.left)[0]
        right = kutil.parse_width("tex", self.right)[0]
        result = rf"\hspace*{{{left}}}" + latex_util.minipage(
            self.s, rf"\linewidth - {left} - {right}", center=False)
        result = latex_util.block(result)
        return result

    def txt(self):
        left = int(kutil.parse_width("txt", self.left)[0])
        right = int(kutil.parse_width("txt", self.right)[0])
        indent = phases.txt_nbsp_marker() * left  # a space that survives
        width = int(self.Target_txt_width) - left - right
        result = re.sub("KK0022", '"', self.s)
        return phases.txt_lay_out(indent + f"\n{indent}".join(phases.txt_wrap(result, width)))

class Hspace(klammer_base.Klammer_base):
    """Horizontal space (@hspace): a width, so a bare number is characters
    in every target."""
    def __init__(self, K):
        super().__init__(K)

    def html(self):
        return f'<span style="display: inline-block; width: {kutil.parse_width("html", self.width)[0]}"></span>'

    def tex(self):
        return f"\\hspace{{{kutil.parse_width('tex', self.width)[0]}}}"

    def txt(self):
        # The nbsp marker, not spaces: an @eval result of only whitespace
        # is trimmed away entirely.
        return phases.txt_nbsp_marker() * int(kutil.parse_width("txt", self.width)[0])
    

class Note(klammer_base.Klammer_base):
    def __init__(self, K):
        super().__init__(K)

    def html(self):
        result = E("div").cls("box")\
                         .sty("width", f"{self.width*100}%")\
                         .sty("background-color", html_util.color(self.color))\
                         .sty("border-color", html_util.color(self.border_color))\
                         .sty("margin-left", "auto")\
                         .body(f"<b>{self.label}:</b> {self.s}")\
                         .str()
        return result

    def tex(self):
        return latex_util.color_box(
            f"\\textbf{{{self.label}:}} {self.s}",
            self.width,  self.color, self.border_color)


class Block(klammer_base.Klammer_base):
    def __init__(self, K):
        super().__init__(K)

    def tex(self):
        # NOT latex_util.block(): a textblock is absolutely positioned and
        # does not participate in the normal flow, so breaking the paragraph
        # around it would move the surrounding text.
        #
        # The trailing \par\kern0pt gives the block's vbox zero depth.
        # textpos anchors :point against the box HEIGHT alone, so content
        # whose last line has depth -- an @image, whose [c] minipage sits
        # half below the baseline -- was anchored a quarter of its height
        # too low (2in for a page-high picture) until 2026-09-08.
        to_x, to_y = [float(e) for e in self.to.split()]
        pt_x, pt_y  = [float(e) for e in self.point.split()]
        result = f"""
\\begin{{textblock}}{{{self.width}}}[{pt_x},{pt_y}]({to_x},{to_y})
\\setlength{{\\textwidth}}{{\\linewidth}}
\\vspace*{{-1\\parskip}}
{self.content.strip()}
\\par\\kern0pt
\\end{{textblock}}
"""
        return result


class Lines(klammer_base.Klammer_base):
    def __init__(self, K):
        super().__init__(K)
        self.lines = self.s.split("\n")

    def html(self):
        result = ""
        for line in self.lines:
            result += line + "<br/>\n"
        return result

    def tex(self):
        return "\\\\\n".join(self.lines) + "\n"

    def txt(self):
        return self.lines

class Vspace(klammer_base.Klammer_base):
    """Vertical space (@vspace): the first parameter of the height type.  A
    bare number is lines in every target, as it always was here; a unit
    (2em, 12pt) is now accepted as well, under html and tex."""
    def __init__(self, K):
        super().__init__(K)

    def html(self):
        height = kutil.parse_height("html", self.lines)[0]
        return f'<div style="{kutil.css_height("height", height)}"></div>'

    def tex(self):
        return f"\\vspace{{{kutil.parse_height('tex', self.lines)[0]}}}"

    def txt(self):
        # One marker per line; the justification phase turns them into
        # blank lines after paragraph normalization (a whitespace-only
        # @eval result would be trimmed away, hence the markers).
        return phases.txt_vspace_marker() * int(kutil.parse_height("txt", self.lines)[0])

class Left_right(klammer_base.Klammer_base):
    def __init__(self, K):
        super().__init__(K)
        self.rows = list(zip(self.parts[0], self.parts[1]))

    def html(self):
        result = ""
        for left, right in self.rows:
            result += E("div").body(
                E("span").cls("left_right").body(left).str() + \
                E("span").cls("left_right").sty("text-align", "right").body(right).str()).str();
        result = E("p").body(result).str()
        return result
    
    def tex(self):
        result = ""
        for left, right in self.rows:
            result += rf"\parbox{{\linewidth}}{{{left} \hfill {right}}}" + " \\\\\n"
        result = result[:-3]
        return result

    def txt(self):
        # Plain text: the left text at the block indent, the right text ending
        # at Target_txt_width, the gap filled with the nbsp marker (the only
        # space that survives to the output, and what marks the block as laid
        # out).  A pair that cannot share a line -- less than two columns
        # between them -- goes on two lines, the right text still flush right.
        nbsp = phases.txt_nbsp_marker()
        indent = int(self.Target_txt_indent)
        width = int(self.Target_txt_width)
        lines = []
        for left, right in self.rows:
            left, right = left.strip(), right.strip()
            gap = width - indent - phases.txt_visible_length(left) - phases.txt_visible_length(right)
            if gap >= 2:
                lines.append(nbsp * indent + left + nbsp * gap + right)
            else:
                lines.append(nbsp * indent + left)
                lines.append(nbsp * max(indent, width - phases.txt_visible_length(right)) + right)
        return phases.txt_lay_out("\n".join(lines))