#!/bin/bash
# Football ISO Build Script
# Creates Debian 13 ISO with embedded preseed configuration
# All work done in Docker container

set -e

BUILD_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
OUTPUT_DIR="$BUILD_DIR/output"
ISO_DIR="$BUILD_DIR/iso-tmp"

echo "================================================"
echo "Football ISO Build"
echo "================================================"
echo ""

# ============================================================================
# Step 1: Download Debian ISO
# ============================================================================

echo "[1/5] Downloading Debian 13 Netboot ISO..."
mkdir -p "$ISO_DIR"

docker run --rm \
    --name football-iso-build \
    -v "$BUILD_DIR:/build" \
    debian:trixie \
    bash -c '
        set -e
        echo "Installing wget..."
        apt-get update -qq
        apt-get install -y -qq wget xorriso

        echo ""
        echo "Downloading Debian Netboot ISO..."
        cd /build/iso-tmp

        # Download current testing/sid ISO (trixie is still testing)
        wget -q --show-progress \
            -O debian-amd64-netinst.iso \
            https://cdimage.debian.org/debian-cd/current/amd64/iso-cd/debian-sid-amd64-netinst.iso || \
        wget -q --show-progress \
            -O debian-amd64-netinst.iso \
            https://cdimage.debian.org/debian-cd/testing/amd64/iso-cd/debian-testing-amd64-netinst.iso

        echo ""
        echo "✅ ISO downloaded"
        ls -lh /build/iso-tmp/*.iso
    '

echo ""
echo "✅ Step 1 complete"
echo ""

# ============================================================================
# Step 2: Extract ISO
# ============================================================================

echo "[2/5] Extracting ISO..."

docker run --rm \
    --name football-iso-extract \
    -v "$BUILD_DIR:/build" \
    debian:trixie \
    bash -c '
        set -e
        echo "Installing extraction tools..."
        apt-get update -qq
        apt-get install -y -qq xorriso rsync

        echo ""
        echo "Extracting ISO..."
        cd /build/iso-tmp
        mkdir -p extracted
        xorriso -osirrox on -indev debian-trixie-amd64-netinst.iso \
            -extract / extracted/

        echo ""
        echo "✅ ISO extracted"
        echo "Files in extracted:"
        ls -la /build/iso-tmp/extracted/
    '

echo ""
echo "✅ Step 2 complete"
echo ""

# ============================================================================
# Step 3: Inject Preseed Configuration
# ============================================================================

echo "[3/5] Injecting preseed configuration..."

docker run --rm \
    --name football-iso-preseed \
    -v "$BUILD_DIR:/build" \
    debian:trixie \
    bash -c '
        set -e
        echo "Copying preseed file..."
        cp /build/config/preseed.cfg /build/iso-tmp/extracted/preseed.cfg

        echo ""
        echo "Modifying boot menu to use preseed..."

        # Update isolinux.cfg to auto-load preseed
        cat > /build/iso-tmp/extracted/isolinux/isolinux.cfg << "EOF"
default football
timeout 5

label football
    menu label ^Install Football Secure Access System
    kernel /install.amd/vmlinuz
    append vga=788 initrd=/install.amd/initrd.gz auto=true priority=critical file=/cdrom/preseed.cfg -- quiet

label manual
    menu label ^Manual Install
    kernel /install.amd/vmlinuz
    append vga=788 initrd=/install.amd/initrd.gz -- quiet

label expert
    menu label ^Expert Mode
    kernel /install.amd/vmlinuz
    append vga=788 initrd=/install.amd/initrd.gz priority=low -- quiet

label rescue
    menu label ^Rescue Mode
    kernel /install.amd/vmlinuz
    append vga=788 initrd=/install.amd/initrd.gz rescue/enable=true -- quiet
EOF

        echo ""
        echo "✅ Preseed injected"
        cat /build/iso-tmp/extracted/isolinux/isolinux.cfg
    '

echo ""
echo "✅ Step 3 complete"
echo ""

# ============================================================================
# Step 4: Create ISO
# ============================================================================

echo "[4/5] Creating new ISO with preseed..."

mkdir -p "$OUTPUT_DIR"

docker run --rm \
    --name football-iso-create \
    -v "$BUILD_DIR:/build" \
    debian:trixie \
    bash -c '
        set -e
        echo "Creating ISO..."
        cd /build/iso-tmp/extracted

        xorriso -as mkisofs \
            -r -V "Football Secure System" \
            -o /build/output/football-installer.iso \
            -J -l -b isolinux/isolinux.bin \
            -c isolinux/boot.cat \
            -no-emul-boot \
            -boot-load-size 4 \
            -boot-info-table \
            -isohybrid-mbr /usr/lib/ISOLINUX/isohdpfx.bin \
            -eltorito-alt-boot \
            -e boot/grub/efi.img \
            -no-emul-boot \
            -isohybrid-gpt-basdat \
            .

        echo ""
        echo "✅ ISO created"
        ls -lh /build/output/football-installer.iso
    '

echo ""
echo "✅ Step 4 complete"
echo ""

# ============================================================================
# Step 5: Verify ISO
# ============================================================================

echo "[5/5] Verifying ISO..."

docker run --rm \
    -v "$BUILD_DIR:/build" \
    debian:trixie \
    bash -c '
        echo "ISO information:"
        file /build/output/football-installer.iso
        echo ""
        echo "ISO size:"
        ls -lh /build/output/football-installer.iso
        echo ""
        echo "✅ ISO verified"
    '

echo ""
echo "✅ Step 5 complete"
echo ""

# ============================================================================
# Summary
# ============================================================================

echo "================================================"
echo "ISO BUILD COMPLETE"
echo "================================================"
echo ""
echo "Output file:"
echo "  📁 $OUTPUT_DIR/football-installer.iso"
echo ""
echo "Usage:"
echo "  1. Write ISO to USB: sudo dd if=$OUTPUT_DIR/football-installer.iso of=/dev/sdX bs=4M status=progress"
echo "  2. Boot from USB"
echo "  3. Installer will automatically use preseed configuration"
echo "  4. User only needs to provide:"
echo "     - Username"
echo "     - User password (min 12 chars, mixed case, numbers, special chars)"
echo "     - Root password (min 12 chars, mixed case, numbers, special chars)"
echo "     - Target disk for installation"
echo ""
echo "✅ BUILD COMPLETE!"
echo ""