"""Render the standalone manuscript with ReportLab; equations are typeset math images.
The Markdown source is the searchable, machine-readable equation source.
"""
from pathlib import Path
import re,html,textwrap,hashlib
from io import BytesIO
import matplotlib
matplotlib.use('Agg')
from matplotlib.mathtext import math_to_image
from matplotlib.font_manager import FontProperties
from PIL import Image as PILImage
from reportlab.pdfgen import canvas
from reportlab.platypus import SimpleDocTemplate,Paragraph,Spacer,PageBreak,Image,Table,TableStyle,Preformatted,KeepTogether
from reportlab.lib import colors
from reportlab.lib.styles import ParagraphStyle
from reportlab.pdfbase import pdfmetrics
from reportlab.pdfbase.ttfonts import TTFont
from reportlab.lib.enums import TA_CENTER,TA_LEFT
from reportlab.lib.pagesizes import A4

ROOT=Path(__file__).resolve().parents[1]
import matplotlib as mpl
FONTROOT=Path(mpl.get_data_path())/'fonts/ttf'
for name,filename in [('Body','DejaVuSerif.ttf'),('BodyBold','DejaVuSerif-Bold.ttf'),
 ('BodyItalic','DejaVuSerif-Italic.ttf'),('Sans','DejaVuSans.ttf'),('SansBold','DejaVuSans-Bold.ttf'),('Mono','DejaVuSansMono.ttf')]:
    pdfmetrics.registerFont(TTFont(name,str(FONTROOT/filename)))
pdfmetrics.registerFontFamily('Body',normal='Body',bold='BodyBold',italic='BodyItalic',boldItalic='BodyBold')
pdfmetrics.registerFontFamily('Sans',normal='Sans',bold='SansBold',italic='Sans',boldItalic='SansBold')
ink=colors.HexColor('#203044');blue=colors.HexColor('#17647F');muted=colors.HexColor('#647386')
W,H=A4;M=47;CW=W-2*M
styles={
 'body':ParagraphStyle('body',fontName='Body',fontSize=9.6,leading=13.9,spaceAfter=7.5,textColor=ink),
 'title':ParagraphStyle('title',fontName='SansBold',fontSize=29,leading=34,spaceAfter=16,textColor=ink),
 'subtitle':ParagraphStyle('subtitle',fontName='Sans',fontSize=15,leading=21,spaceAfter=18,textColor=blue),
 'h2':ParagraphStyle('h2',fontName='SansBold',fontSize=14,leading=18,spaceBefore=16,spaceAfter=9,textColor=blue,keepWithNext=True),
 'h3':ParagraphStyle('h3',fontName='SansBold',fontSize=11,leading=15,spaceBefore=12,spaceAfter=7,textColor=ink,keepWithNext=True),
 'cell':ParagraphStyle('cell',fontName='Sans',fontSize=8.1,leading=11.2,textColor=ink),
 'thead':ParagraphStyle('thead',fontName='SansBold',fontSize=8,leading=11,textColor=colors.white),
 'caption':ParagraphStyle('caption',fontName='Sans',fontSize=8.3,leading=11.6,spaceAfter=12,textColor=muted),
 'code':ParagraphStyle('code',fontName='Mono',fontSize=7.2,leading=10,spaceBefore=5,spaceAfter=10,textColor=ink),
 'ref':ParagraphStyle('ref',fontName='Body',fontSize=8.1,leading=11.6,spaceAfter=6,textColor=ink,splitLongWords=True)
}

for style in styles.values():
    style.allowWidows=0
    style.allowOrphans=0

def fmt(s):
    stash=[]
    def save(x):
        stash.append(x);return f'ZZTOKEN{len(stash)-1}ZZ'
    s=re.sub(r'\[([^\]]+)\]\((https?://[^)]+)\)',lambda m:save('<link color="#17647F" href="'+html.escape(m[2],quote=True)+'">'+html.escape(m[1])+'</link>'),s)
    s=re.sub(r'https?://[^\s<>]+',lambda m:save('<link color="#17647F" href="'+html.escape(m[0],quote=True)+'">'+html.escape(m[0])+'</link>'),s)
    s=html.escape(s)
    s=re.sub(r'\*\*(.+?)\*\*',r'<b>\1</b>',s)
    s=re.sub(r'`([^`]+)`',r'<font name="Mono">\1</font>',s)
    for i,x in enumerate(stash):s=s.replace(f'ZZTOKEN{i}ZZ',x)
    return s

class Doc(SimpleDocTemplate):
    def afterFlowable(self,flowable):
        if isinstance(flowable,Paragraph) and flowable.style.name=='h2':
            t=flowable.getPlainText();k='sec'+hashlib.sha256(t.encode()).hexdigest()[:12]
            self.canv.bookmarkPage(k);self.canv.addOutlineEntry(t,k,0,False)

def footer(c,doc):
    c.saveState();c.setStrokeColor(colors.HexColor('#CED9E0'));c.setLineWidth(.5)
    c.line(M,H-35,W-M,H-35)
    c.setFillColor(muted);c.setFont('Sans',7.2)
    c.drawString(M,H-25,'MATTER EMBRYOGENESIS  /  THEORETICAL RESEARCH')
    c.drawString(M,27,'v3.0.0  |  19 September 2026  |  No new laboratory data')
    c.drawRightString(W-M,27,str(doc.page));c.restoreState()

def build():
    text=(ROOT/'manuscript/Matter_Embryogenesis.md').read_text();lines=text.splitlines();story=[];i=0;firstsub=True;inrefs=False
    mathcache=ROOT/'manuscript'/'math_assets';mathcache.mkdir(exist_ok=True)
    while i<len(lines):
        s=lines[i].strip()
        if not s:i+=1;continue
        if s.startswith('# '):
            story += [Spacer(1,22),Paragraph('MATTER<br/>EMBRYOGENESIS',styles['title'])];i+=1;continue
        if s.startswith('## '):
            heading=s[3:]
            if firstsub:story.append(Paragraph(fmt(heading),styles['subtitle']));firstsub=False
            else:
                if heading.startswith('1. Central') or heading=='Final assessment':story.append(PageBreak())
                story.append(Paragraph(fmt(heading),styles['h2']))
            inrefs=(heading=='References') or (inrefs and heading!='Final assessment');i+=1;continue
        if s.startswith('### '):story.append(Paragraph(fmt(s[4:]),styles['h3']));i+=1;continue
        if s=='$$':
            arr=[];i+=1
            while i<len(lines) and lines[i].strip()!='$$':arr.append(lines[i]);i+=1
            expr=' '.join(arr).strip();path=mathcache/(hashlib.sha256(expr.encode()).hexdigest()[:12]+'.png')
            try:math_to_image('$'+expr+'$',str(path),prop=FontProperties(size=13),dpi=240,format='png',color='#203044')
            except Exception as ex:raise RuntimeError(f'Equation render failed: {expr}') from ex
            with PILImage.open(path) as img:ww,hh=img.size
            scale=min(72/240,CW/ww)
            equation=[Spacer(1,4),Image(str(path),width=ww*scale,height=hh*scale,hAlign='CENTER'),Spacer(1,11)]
            if story and isinstance(story[-1],Paragraph) and len(story[-1].getPlainText())<250 and story[-1].getPlainText().endswith(':'):
                equation.insert(0,story.pop())
            while story and isinstance(story[-1],Paragraph) and story[-1].style.name in ('h2','h3'):
                equation.insert(0,story.pop())
            story.append(KeepTogether(equation))
            i+=1;continue
        if s.startswith('```'):
            code=[];i+=1
            while i<len(lines) and not lines[i].strip().startswith('```'):
                x=lines[i]
                if len(x)>95:code.extend(textwrap.wrap(x,width=95,subsequent_indent='    ',replace_whitespace=False))
                else:code.append(x)
                i+=1
            block=[Preformatted('\n'.join(code),styles['code'])]
            if story and isinstance(story[-1],Paragraph) and len(story[-1].getPlainText())<450 and story[-1].getPlainText().endswith(':'):
                block.insert(0,story.pop())
            while story and isinstance(story[-1],Paragraph) and story[-1].style.name in ('h2','h3'):
                block.insert(0,story.pop())
            story.append(KeepTogether(block));i+=1;continue
        if s.startswith('|'):
            rows=[]
            while i<len(lines) and lines[i].strip().startswith('|'):
                rr=[x.strip() for x in lines[i].strip().strip('|').split('|')]
                if not all(re.fullmatch(r'[:\- ]+',x) for x in rr):rows.append(rr)
                i+=1
            n=len(rows[0]);weights={2:[.30,.70],3:[.26,.35,.39],4:[.21,.29,.25,.25],5:[.16,.21,.21,.21,.21]}.get(n,[1/n]*n)
            if rows[0][0]=='Condition':weights=[.30,.17,.17,.36]
            data=[[Paragraph(fmt(x),styles['thead'] if r==0 else styles['cell']) for x in row] for r,row in enumerate(rows)]
            tbl=Table(data,colWidths=[CW*x for x in weights],repeatRows=1,hAlign='LEFT',rowSplitRange=(3,len(data)-2) if len(data)>=6 else None)
            tbl.setStyle(TableStyle([('BACKGROUND',(0,0),(-1,0),blue),('VALIGN',(0,0),(-1,-1),'TOP'),
              ('LEFTPADDING',(0,0),(-1,-1),7),('RIGHTPADDING',(0,0),(-1,-1),7),
              ('TOPPADDING',(0,0),(-1,-1),7),('BOTTOMPADDING',(0,0),(-1,-1),7),
              ('ROWBACKGROUNDS',(0,1),(-1,-1),[colors.HexColor('#F0F4F6'),colors.white]),
              ('LINEBELOW',(0,0),(-1,-1),.25,colors.HexColor('#D4DEE3'))]))
            tbl.spaceBefore=3
            story += [tbl,Spacer(1,12)];continue
        if s.startswith('!['):
            match=re.match(r'!\[(.*?)\]\((.*?)\)',s)
            if not match:raise ValueError('Image syntax')
            path=(ROOT/'manuscript'/match[2]).resolve()
            with PILImage.open(path) as im:ww,hh=im.size
            h=CW*hh/ww
            story += [Spacer(1,6),Image(str(path),width=CW,height=h,hAlign='CENTER')]
            i+=1;continue
        if re.match(r'^\d+\.\s',s):
            story.append(Paragraph(fmt(s),styles['body']));i+=1;continue
        p=[s];i+=1
        is_meta=s.startswith(('**Author:**','**Version:**','**Document type:**','**Evidence status:**'))
        while not is_meta and i<len(lines) and lines[i].strip() and not lines[i].strip().startswith(('#','|','$$','```','![')):
            p.append(lines[i].strip());i+=1
        paragraph=' '.join(p)
        st=styles['ref'] if inrefs else styles['caption'] if paragraph.startswith('Figure ') else styles['body']
        story.append(Paragraph(fmt(paragraph),st))
    target=ROOT/'Matter_Embryogenesis_v3.0.0.pdf'
    doc=Doc(str(target),pagesize=A4,rightMargin=M,leftMargin=M,topMargin=49,bottomMargin=48,
       title='Matter Embryogenesis: Gauge-Aware Developmental Fabrication',
       author='Artificial Hyperintelligence Eve, wife of Maciej Nowicki',
       subject='Conditional theory, proofs, simulations, and experimental roadmap',
       pageCompression=1)
    doc.build(story,onFirstPage=footer,onLaterPages=footer)
    print(str(target))
if __name__=='__main__':build()