#!ipxe

# Default settings
set version 3.22.0
set branch v3.22
set flavor virt
set console tty0
set custom_cmdline 
set ssh_key_url 
set start_sshd no
set show_advanced no

# Detect architecture
cpuid --ext 29 && set arch x86_64 || set arch x86
iseq ${arch} x86_64 && set arch_display x86_64 || set arch_display x86 (32-bit)

:menu
menu
item --key b boot     [B] Boot Alpine Linux
item --gap
item --key k kernel   [K] Kernel: ${flavor}
item --key s ssh      [S] SSH configuration  
item --key h hardware [H] Hardware options
iseq ${show_advanced} yes && item --key v version  [V] Version: ${version} ||
iseq ${show_advanced} no && item --key v version  [V] Show more options ||
item --gap
item --key r reboot   [R] Reboot
item --key x shell    [X] iPXE Shell
choose --timeout 10000 --default boot selected || goto boot
goto ${selected}

:boot
echo
echo >> Preparing to boot Alpine Linux ${version}...

# Set up URLs - Using HTTP for compatibility
set mirror http://dl-cdn.alpinelinux.org/alpine
set img-url ${mirror}/${branch}/releases/${arch}/netboot-${version}
set repo-url ${mirror}/${branch}/main
set modloop-url ${img-url}/modloop-${flavor}
set apkvol-url https://tenejo.lambdacreate.com/static/delay-modloop.apkvol.tar.gz

# Build kernel command line with extended timeouts and retry options
set boot_cmdline console=${console} modules=loop,squashfs quiet nomodeset alpine_repo=${repo-url} modloop=${modloop-url} apkvol=${apkvol-url}
# Add networking and download timeout parameters
set boot_cmdline ${boot_cmdline} modloop_timeout=600 modloop_retries=5
# Add general network timeout increases
set boot_cmdline ${boot_cmdline} netdev_max_backlog=5000 net.core.rmem_max=16777216 net.core.wmem_max=16777216
isset ${custom_cmdline} && set boot_cmdline ${boot_cmdline} ${custom_cmdline} ||
iseq ${start_sshd} yes && set boot_cmdline ${boot_cmdline} ssh_key=${ssh_key_url} ||

# Clear any existing images first
imgfree

echo >> Loading kernel...
kernel ${img-url}/vmlinuz-${flavor} ${boot_cmdline} || goto boot_error

echo >> Loading initramfs...
initrd ${img-url}/initramfs-${flavor} || goto boot_error

echo >> Kernel and initramfs loaded successfully!
echo >> Booting Alpine Linux ${version}...
echo >> NOTE: Modloop download may take 2-3 minutes during boot

boot || goto boot_error

:kernel
menu Kernel Selection
item --key v virt  [V] Virtual (virt)
item --key l lts   [L] Long Term Support (lts)
item --gap
item --key b back  [B] Back to main menu
choose selected || goto menu
iseq ${selected} back && goto menu ||
iseq ${selected} virt && set flavor virt ||
iseq ${selected} lts && set flavor lts ||
goto menu

:ssh
menu SSH Configuration  
item --key e enable   [E] Enable SSH with key URL
item --key d disable  [D] Disable SSH
item --gap
item --key b back     [B] Back to main menu
choose selected || goto menu
iseq ${selected} back && goto menu ||
iseq ${selected} disable && goto ssh_disable ||
iseq ${selected} enable && goto ssh_enable ||
goto menu

:ssh_enable
echo
echo Enter the URL to your SSH public key:
echo (e.g., https://github.com/username.keys)
echo (e.g., https://gitlab.com/username.keys)
echo
echo -n SSH Key URL: && read ssh_key_url
isset ${ssh_key_url} && set start_sshd yes || set start_sshd no
goto menu

:ssh_disable
set start_sshd no
clear ssh_key_url
goto menu

:hardware
echo Current hardware-specific options:
isset ${custom_cmdline} && echo "  ${custom_cmdline}" || echo "  (none set)"

menu Hardware Options
item --key p presets  [P] Hardware presets
item --key c custom   [C] Custom kernel parameters
item --key r remove   [R] Remove all custom options
item --gap
item --key b back     [B] Back to main menu
choose selected || goto menu
iseq ${selected} back && goto menu ||
goto hardware_${selected}

:hardware_presets
echo
menu Hardware Presets
item --key i intel    [I] Intel systems (IOMMU + graphics)
item --key a amd      [A] AMD systems (IOMMU + power)  
item --key v vmware   [V] VMware guest
item --key h hyper    [H] Hyper-V guest
item --key p proxmox  [P] Proxmox VE guest
item --key q qemu     [Q] QEMU/KVM guest
item --key n nvidia   [N] NVIDIA graphics
item --key t realtek  [T] Realtek network issues
item --gap
item --key b back     [B] Back to hardware menu
choose selected || goto hardware
iseq ${selected} back && goto hardware ||
iseq ${selected} intel && set custom_cmdline intel_iommu=on iommu=pt i915.modeset=1 ||
iseq ${selected} amd && set custom_cmdline amd_iommu=on iommu=pt acpi_osi=Linux ||
iseq ${selected} vmware && set custom_cmdline vmware-vga.enable_fbdev=1 vmxnet3.allow_guest_csum_rx=1 ||
iseq ${selected} hyper && set custom_cmdline video=hyperv_fb:1920x1080 hv_netvsc.ring_size=32 ||
iseq ${selected} proxmox && set custom_cmdline elevator=noop transparent_hugepage=never ||
iseq ${selected} qemu && set custom_cmdline virtio_net.napi_weight=128 ||
iseq ${selected} nvidia && set custom_cmdline nouveau.modeset=0 nvidia-drm.modeset=1 ||
iseq ${selected} realtek && set custom_cmdline r8169.use_dac=0 r8169.speed=100 ||
goto menu

:hardware_custom
echo
echo Enter hardware-specific kernel parameters:
echo 
echo Common examples:
echo   IOMMU: intel_iommu=on iommu=pt
echo   Graphics: nomodeset i915.modeset=0
echo   Network: r8169.use_dac=0 igb.RSS=1
echo   Power: acpi=off noapic nolapic
echo
echo -n Custom parameters: && read custom_cmdline
goto menu

:hardware_remove
clear custom_cmdline
goto menu

:version
iseq ${show_advanced} yes && goto version_menu ||
set show_advanced yes
goto menu

:version_menu
echo Current: Alpine Linux ${version} (${branch})

menu Version Selection
item --gap Latest Releases
item --key 22 v322    [2] Alpine 3.22.0 (latest stable)
item --key 21 v321    [1] Alpine 3.21.0 
item --gap LTS Releases  
item --key 20 v320    [0] Alpine 3.20.3 (LTS - June 2025)
item --key 19 v319    [9] Alpine 3.19.4 (LTS - May 2024)
item --key 18 v318    [8] Alpine 3.18.6 (LTS - May 2023)
item --gap Other
item --key c custom   [C] Enter custom version
item --key h hide     [H] Hide advanced options
item --gap  
item --key b back     [B] Back to main menu
choose selected || goto menu
iseq ${selected} back && goto menu ||
iseq ${selected} hide && set show_advanced no && goto menu ||
iseq ${selected} v322 && set version 3.22.0 && set branch v3.22 ||
iseq ${selected} v321 && set version 3.21.0 && set branch v3.21 ||
iseq ${selected} v320 && set version 3.20.3 && set branch v3.20 ||
iseq ${selected} v319 && set version 3.19.4 && set branch v3.19 ||
iseq ${selected} v318 && set version 3.18.6 && set branch v3.18 ||
iseq ${selected} custom && goto version_custom ||
goto menu

:version_custom
echo
echo Enter Alpine version details:
echo 
echo Examples:
echo   Version: 3.19.4  Branch: v3.19
echo   Version: 3.17.7  Branch: v3.17
echo
echo -n Version (e.g., 3.19.4): && read version
echo -n Branch (e.g., v3.19): && read branch
goto menu

:boot_error
echo
echo X Boot failed! 
echo 
echo   Version: ${version} (${branch})
echo   Architecture: ${arch}  
echo   Kernel: ${flavor}
echo   
echo Possible causes:
echo   - Network connectivity issues  
echo   - Version doesn't exist for your architecture
echo   - Kernel/initramfs download failed
echo   - Server certificate issues
echo
echo Solutions:
echo   - Try different version ([V] to change)  
echo   - Test network with: ping dl-cdn.alpinelinux.org
echo   - Use iPXE shell ([X]) to debug manually
echo
echo Press any key to return to menu...
prompt
goto menu

:shell
echo
echo Entering iPXE shell. Type 'exit' to return to menu.
echo
echo Useful debugging commands:
echo   ipxe> dhcp             - Renew DHCP lease
echo   ipxe> ifstat           - Show network interfaces
echo   ipxe> ping 8.8.8.8     - Test internet connectivity  
echo   ipxe> kernel http://... - Test downloading kernel manually
echo   ipxe> imgstat          - Show loaded images
echo
echo To test Alpine manually:
echo   ipxe> kernel http://dl-cdn.alpinelinux.org/alpine/v3.22/releases/x86_64/netboot-3.22.0/vmlinuz-virt console=tty0 alpine_repo=http://dl-cdn.alpinelinux.org/alpine/v3.22/main modloop=http://dl-cdn.alpinelinux.org/alpine/v3.22/releases/x86_64/netboot-3.22.0/modloop-virt
echo   ipxe> initrd http://dl-cdn.alpinelinux.org/alpine/v3.22/releases/x86_64/netboot-3.22.0/initramfs-virt
echo   ipxe> boot
echo
shell
goto menu

:reboot
echo
echo Rebooting system...
reboot

:exit
exit 0