#!/usr/bin/env python3
"""
Generate personalized brevet cards from CSV data.
"""
import csv
import sys
from pathlib import Path

def escape_latex(text):
    """Escape special LaTeX characters."""
    if not text:
        return ""
    replacements = {
        '&': r'\&',
        '%': r'\%',
        '$': r'\$',
        '#': r'\#',
        '_': r'\_',
        '{': r'\{',
        '}': r'\}',
        '~': r'\textasciitilde{}',
        '^': r'\textasciicircum{}',
        '\\': r'\textbackslash{}',
    }
    result = str(text)
    for char, replacement in replacements.items():
        result = result.replace(char, replacement)
    return result

def generate_card_from_template(template, data):
    """Replace placeholders in template with participant data."""
    name = f"{escape_latex(data['Vorname'])} {escape_latex(data['Nachname'])}"
    street = escape_latex(data['Straße'])
    plz_ort = f"{escape_latex(data['PLZ'])} {escape_latex(data['Ort'])}"
    land = escape_latex(data['Land'])
    medaille = "Ja" if data['Medaille'].lower() == 'ja' else "Nein"
    startnr = escape_latex(data['Startnr'])

    # Replace placeholders
    card = template.replace('{{NAME}}', name)
    card = card.replace('{{STREET}}', street)
    card = card.replace('{{PLZ_ORT}}', plz_ort)
    card = card.replace('{{LAND}}', land)
    card = card.replace('{{MEDAILLE}}', medaille)
    card = card.replace('{{STARTNR}}', startnr)

    return card

def main():
    csv_file = Path("Export Brevetkarte.csv")
    template_file = Path("brevetkarte-template.tex")
    output_file = Path("brevetkarte-personalized.tex")

    if not csv_file.exists():
        print(f"Error: {csv_file} not found!", file=sys.stderr)
        sys.exit(1)

    if not template_file.exists():
        print(f"Error: {template_file} not found!", file=sys.stderr)
        sys.exit(1)

    # Read template
    print(f"Reading template from {template_file}...")
    template = template_file.read_text(encoding='utf-8')

    # Read CSV data
    print(f"Reading participant data from {csv_file}...")
    participants = []
    with open(csv_file, 'r', encoding='utf-8-sig') as f:  # utf-8-sig handles BOM
        reader = csv.DictReader(f)
        for row in reader:
            if row['Startnr']:  # Skip empty rows
                participants.append(row)

    if not participants:
        print("No participants found in CSV file!", file=sys.stderr)
        sys.exit(1)

    print(f"Found {len(participants)} participant(s)")

    # Generate document with all cards
    cards = []
    for i, participant in enumerate(participants):
        card = generate_card_from_template(template, participant)
        cards.append(card)

    # Combine cards with spacing/page breaks
    document_parts = []
    for i, card in enumerate(cards):
        document_parts.append(card)

        # Add vertical space between cards on same page
        if i % 2 == 0 and i < len(cards) - 1:
            document_parts.append("\n\\vspace{0.8cm}\n\n")

        # Add page break after every 2 cards (except at the end)
        if i % 2 == 1 and i < len(cards) - 1:
            document_parts.append("\n\\newpage\n\n")

    # Close document
    document_parts.append("\n\\end{document}\n")

    # Write output
    document = ''.join(document_parts)
    output_file.write_text(document, encoding='utf-8')

    print(f"Generated {output_file}")
    print(f"Total pages: {(len(participants) + 1) // 2}")
    print(f"Compile with: make build-personalized")

if __name__ == "__main__":
    main()