#!/usr/bin/env bash
# Serve dealignai/Ornith-1.5-35B-A3B-UNCENSORED (CRACK, Q6_K) as
# frank-default-small via upstream llama.cpp on Dankserver (RTX 3090, MoE
# experts on CPU).
#
# Runtime: upstream llama.cpp llama-server (b10121). The model is a 35B-total /
# 3B-active MoE-dense hybrid with an MTP head bundled in the GGUF; this
# service uses ngram-mod instead of MTP speculation.
#
# Expert offload: the expert (FFN exps) tensors selected by the layer-bounded
# --override-tensor pattern are pinned to CPU. Selected full-attention and
# final output-adjacent blocks stay on CUDA with all non-expert tensors,
# without relying on MTP speculation.
#
# Speculative decoding: ngram-mod only. MTP is intentionally disabled.
#
# Tunables come from frank-default-small.env unless FRANK_SMALL_ENV_FILE
# overrides that path.
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
ENV_FILE="${FRANK_SMALL_ENV_FILE:-$SCRIPT_DIR/frank-default-small.env}"
if [[ -f "$ENV_FILE" ]]; then
    set -a
    # shellcheck disable=SC1090
    source "$ENV_FILE"
    set +a
fi

# --- defaults (used when the env file does not set them) -----------------
: "${MODEL_DIR:=/home/dank/models}"
: "${MODEL_FILE:=Ornith-1.5-35B-A3B-CRACK-Q6_K.gguf}"
: "${MMPROJ_FILE:=mmproj-Ornith-1.5-35B-A3B-f16.gguf}"
: "${LLAMA_SERVER:=/home/dank/llama.cpp/build/bin/llama-server}"
: "${CHAT_TEMPLATE_FILE:=$SCRIPT_DIR/chat-template.jinja}"
: "${ALIAS:=frank-default-small}"
: "${BIND_ADDR:=0.0.0.0}"
: "${LISTEN_PORT:=7770}"
: "${CTX_SIZE:=491520}"
: "${PARALLEL:=3}"
: "${SPEC_TYPE:=ngram-mod}"
: "${SPEC_NGRAM_MOD_N_MIN:=48}"
: "${SPEC_NGRAM_MOD_N_MAX:=64}"
: "${SPEC_NGRAM_MOD_N_MATCH:=24}"
: "${CACHE_TYPE_K:=f16}"
: "${CACHE_TYPE_V:=f16}"
: "${VERBOSITY:=4}"
# Expert offload: --override-tensor regex pinned to the CPU buft. Same pattern
# the internal --cpu-moe / --n-cpu-moe use; explicit here so we only move the
# MoE expert weights and leave every other tensor on the GPU.
: "${OVERRIDE_EXPERT:=blk\.(0|1|2|4|5|6|8|9|10|12|13|14|16|17|18|20|21|22|24|25|26|28|29|30|32|33|34)\.ffn_(up|down|gate|gate_up)_(ch|)exps}"
: "${OVERRIDE_BUFT:=CPU}"
: "${N_GPU_LAYERS:=all}"
: "${BATCH_SIZE:=4096}"
: "${UBATCH_SIZE:=1024}"
: "${CTX_CHECKPOINTS:=16}"
: "${NO_MMAP:=1}"
: "${TEMPERATURE:=1.0}"
: "${TOP_K:=20}"
: "${TOP_P:=0.95}"
: "${MIN_P:=0.0}"
: "${THREADS:=7}"
: "${THREADS_HTTP:=8}"

MODEL="$MODEL_DIR/$MODEL_FILE"
MMPROJ="$MODEL_DIR/$MMPROJ_FILE"

for f in "$MODEL" "$MMPROJ" "$CHAT_TEMPLATE_FILE"; do
    if [[ ! -f "$f" ]]; then
        echo "missing required file: $f" >&2
        exit 1
    fi
done
if [[ ! -x "$LLAMA_SERVER" ]]; then
    echo "missing llama-server binary: $LLAMA_SERVER" >&2
    exit 1
fi

exec "$LLAMA_SERVER" \
    --model "$MODEL" \
    --mmproj "$MMPROJ" \
    --chat-template-file "$CHAT_TEMPLATE_FILE" \
    --spec-type "$SPEC_TYPE" \
    --spec-ngram-mod-n-min "$SPEC_NGRAM_MOD_N_MIN" \
    --spec-ngram-mod-n-max "$SPEC_NGRAM_MOD_N_MAX" \
    --spec-ngram-mod-n-match "$SPEC_NGRAM_MOD_N_MATCH" \
    --override-tensor "$OVERRIDE_EXPERT=$OVERRIDE_BUFT" \
    --cache-type-k "$CACHE_TYPE_K" \
    --cache-type-v "$CACHE_TYPE_V" \
    --verbosity "$VERBOSITY" \
    --ctx-size "$CTX_SIZE" \
    --parallel "$PARALLEL" \
    --gpu-layers "$N_GPU_LAYERS" \
    --batch-size "$BATCH_SIZE" \
    --ubatch-size "$UBATCH_SIZE" \
    --ctx-checkpoints "$CTX_CHECKPOINTS" \
    $([ "$NO_MMAP" = "1" ] && printf -- "--no-mmap") \
    --temp "$TEMPERATURE" \
    --top-k "$TOP_K" \
    --top-p "$TOP_P" \
    --min-p "$MIN_P" \
    --threads "$THREADS" \
    --threads-http "$THREADS_HTTP" \
    --alias "$ALIAS" \
    --host "$BIND_ADDR" \
    --port "$LISTEN_PORT"