#!/bin/bash

set -u

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
cd "$SCRIPT_DIR" || exit 1

PDF_DEFAULT="$SCRIPT_DIR/BlackboxBook.pdf"
PDF_EBOOK="$SCRIPT_DIR/BlackboxBook_ebook.pdf"
PDF_PHONE="$SCRIPT_DIR/BlackboxBook_phone.pdf"
EPUB="$SCRIPT_DIR/BlackboxBook.epub"
MOBI="$SCRIPT_DIR/BlackboxBook.mobi"
FB2="$SCRIPT_DIR/BlackboxBook.fb2"

failures=0

report_step() {
  if [ $1 -eq 0 ]; then
    printf "  ✓ %s\n" "$2"
  else
    printf "  ✗ %s\n" "$2"
    failures=$((failures + 1))
  fi
}

require_tool() {
  if ! command -v "$1" >/dev/null 2>&1; then
    printf "ERROR: %s was not found in PATH.\n" "$1"
    failures=$((failures + 1))
    return 1
  fi
  return 0
}

printf "Building all formats...\n\n"

printf "[1/6] PDF (A4, default)\n"
require_tool python3 || true
if command -v python3 >/dev/null 2>&1; then
  python3 "$SCRIPT_DIR/scripts/build_book_pdf.py" --source "$SCRIPT_DIR/book" --output "$PDF_DEFAULT"
  report_step $? "$PDF_DEFAULT"
fi

printf "\n[2/6] PDF (ebook, 6x8in)\n"
python3 "$SCRIPT_DIR/scripts/build_book_pdf.py" \
  --source "$SCRIPT_DIR/book" \
  --output "$PDF_EBOOK" \
  --layout-profile ebook \
  --page-width 6in \
  --page-height 8in \
  --margin 0.35in \
  --wrap-code-blocks \
  --code-font-size footnotesize
report_step $? "$PDF_EBOOK"

printf "\n[3/6] PDF (phone, 4.1x9.1in)\n"
python3 "$SCRIPT_DIR/scripts/build_book_pdf.py" \
  --source "$SCRIPT_DIR/book" \
  --output "$PDF_PHONE" \
  --layout-profile phone \
  --page-width 4.1in \
  --page-height 9.1in \
  --margin 0.22in \
  --wrap-code-blocks \
  --code-font-size footnotesize
report_step $? "$PDF_PHONE"

printf "\n[4/6] EPUB3\n"
require_tool pandoc || true
if command -v pandoc >/dev/null 2>&1; then
  pandoc "$SCRIPT_DIR"/book/*.md \
    --resource-path="$SCRIPT_DIR/book" \
    --standalone \
    --toc --toc-depth=2 \
    --metadata title="От чёрного ящика к инженерии" \
    --metadata author="Руководство по механике LLM" \
    --metadata lang=ru \
    --metadata date="2026" \
    --to epub3 \
    -o "$EPUB"
  report_step $? "$EPUB"
fi

printf "\n[5/6] MOBI (из EPUB)\n"
require_tool ebook-convert || true
if command -v ebook-convert >/dev/null 2>&1; then
  ebook-convert "$EPUB" "$MOBI" >/dev/null 2>&1
  report_step $? "$MOBI"
fi

printf "\n[6/6] FB2 (из EPUB)\n"
if command -v ebook-convert >/dev/null 2>&1; then
  ebook-convert "$EPUB" "$FB2" >/dev/null 2>&1
  report_step $? "$FB2"
fi

printf "\n---\n"
if [ "$failures" -eq 0 ]; then
  printf "Все форматы собраны:\n"
  for f in "$PDF_DEFAULT" "$PDF_EBOOK" "$PDF_PHONE" "$EPUB" "$MOBI" "$FB2"; do
    if [ -f "$f" ]; then
      printf "  %s (%s)\n" "$(basename "$f")" "$(du -h "$f" | cut -f1)"
    fi
  done
else
  printf "Сборка завершилась с %s ошибкой(ами).\n" "$failures"
fi

if [ -t 0 ]; then
  printf "\nPress Enter to close..."
  read -r _
fi

exit "$failures"