# KubeSolo OS — GRUB Configuration (ARM64)
# A/B partition boot with automatic rollback.
#
# Same A/B logic as build/grub/grub.cfg; only the console parameters differ
# (ARM64 PL011 / 16550-compat UART rather than x86 ttyS0).
#
# Partition layout:
#   (hd0,gpt1) — EFI/Boot  (256 MB, FAT32) — contains GRUB + grubenv
#   (hd0,gpt2) — System A  (512 MB, ext4)  — vmlinuz + kubesolo-os.gz
#   (hd0,gpt3) — System B  (512 MB, ext4)  — vmlinuz + kubesolo-os.gz
#   (hd0,gpt4) — Data      (remaining, ext4) — persistent K8s state

set default=0
set timeout=3

load_env

# --- A/B Rollback Logic (identical to amd64 grub.cfg) ---

if [ "${boot_success}" != "1" ]; then
    if [ "${boot_counter}" = "0" ]; then
        if [ "${active_slot}" = "A" ]; then
            set active_slot=B
        else
            set active_slot=A
        fi
        save_env active_slot
        set boot_counter=3
        save_env boot_counter
    else
        if [ "${boot_counter}" = "3" ]; then
            set boot_counter=2
        elif [ "${boot_counter}" = "2" ]; then
            set boot_counter=1
        elif [ "${boot_counter}" = "1" ]; then
            set boot_counter=0
        fi
        save_env boot_counter
    fi
fi

set boot_success=0
save_env boot_success

if [ "${active_slot}" = "A" ]; then
    set root='(hd0,gpt2)'
    set slot_label="System A"
else
    set root='(hd0,gpt3)'
    set slot_label="System B"
fi

# --- ARM64 console string ---
# Order matters: the LAST `console=` is the primary system console (where /dev/console
# points and where init's stdout/stderr land). Earlier `console=` entries get mirrored
# kernel output but don't carry process I/O.
#
# Covers Graviton/16550 (ttyS0) as secondary and QEMU virt / PL011 / Ampere (ttyAMA0)
# as primary. ttyAMA0 must be last for `-nographic` QEMU + most ARM64 SBCs.
#
# `quiet` is intentionally omitted from the default entry while we stabilise the
# generic ARM64 boot path. Add back once boots are reliable.

menuentry "KubeSolo OS (${slot_label})" {
    echo "Booting KubeSolo OS from ${slot_label}..."
    echo "Boot counter: ${boot_counter}, Boot success: ${boot_success}"
    linux /vmlinuz kubesolo.data=LABEL=KSOLODATA console=ttyS0,115200 console=ttyAMA0,115200
    initrd /kubesolo-os.gz
}

menuentry "KubeSolo OS (${slot_label}) — Debug Mode" {
    echo "Booting KubeSolo OS (debug) from ${slot_label}..."
    linux /vmlinuz kubesolo.data=LABEL=KSOLODATA kubesolo.debug console=ttyS0,115200 console=ttyAMA0,115200
    initrd /kubesolo-os.gz
}

menuentry "KubeSolo OS — Emergency Shell" {
    echo "Booting to emergency shell..."
    linux /vmlinuz kubesolo.shell console=ttyS0,115200 console=ttyAMA0,115200
    initrd /kubesolo-os.gz
}

menuentry "KubeSolo OS — Boot Other Slot" {
    if [ "${active_slot}" = "A" ]; then
        set root='(hd0,gpt3)'
        echo "Booting from System B (passive)..."
    else
        set root='(hd0,gpt2)'
        echo "Booting from System A (passive)..."
    fi
    linux /vmlinuz kubesolo.data=LABEL=KSOLODATA kubesolo.debug console=ttyS0,115200 console=ttyAMA0,115200
    initrd /kubesolo-os.gz
}