#!/usr/bin/env bash
# Serve HauhauCS Qwen3.6-27B-Uncensored-HauhauCS-Aggressive:Q8_K_P
# with DFlash draft speculative decoding (draft-dflash) on dankclaw
# (AMD Strix Halo gfx1151, ROCm backend).
# Runtime: llama.cpp llama-server.
#
# Tunables come from frank-default-large.env in this directory unless the
# FRANK_LARGE_ENV_FILE environment variable overrides that path.
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
ENV_FILE="${FRANK_LARGE_ENV_FILE:-$SCRIPT_DIR/frank-default-large.env}"
if [[ -f "$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:=Qwen3.6-27B-Uncensored-HauhauCS-Aggressive-Q8_K_P.gguf}"
: "${DRAFT_FILE:=Qwen3.6-27B-DFlash-Q8_0.gguf}"
: "${ALIAS:=frank-default-large}"
: "${HOST:=0.0.0.0}"
: "${PORT:=7770}"
: "${CTX_SIZE:=602100}"
: "${PARALLEL:=3}"
: "${SPEC_TYPE:=draft-dflash}"
: "${SPEC_DRAFT_N_MAX:=8}"
: "${SPEC_NGRAM_MOD_N_MIN:=48}"
: "${SPEC_NGRAM_MOD_N_MAX:=64}"
: "${SPEC_NGRAM_MOD_N_MATCH:=24}"
: "${DEVICE:=ROCm0}"
: "${N_GPU_LAYERS:=all}"
: "${CACHE_TYPE_K:=q8_0}"
: "${CACHE_TYPE_V:=q8_0}"
: "${BATCH_SIZE:=8192}"
: "${UBATCH_SIZE:=2048}"
: "${TEMPERATURE:=1.0}"
: "${TOP_K:=20}"
: "${TOP_P:=0.95}"
: "${MIN_P:=0.0}"
: "${THREADS:=12}"
: "${THREADS_HTTP:=1}"

LLAMA_SERVER="${LLAMA_SERVER:-/home/dank/llama.cpp/build/bin/llama-server}"
MODEL="$MODEL_DIR/$MODEL_FILE"
DRAFT="$MODEL_DIR/$DRAFT_FILE"

if [[ ! -f "$MODEL" ]]; then
    echo "missing required file: $MODEL" >&2
    exit 1
fi

# Draft-model flags apply only to spec types that use a draft file
# (draft-dflash, draft-mtp, draft-eagle3). ngram-mod is draftless.
SPEC_ARGS=()
if [[ "$SPEC_TYPE" == *draft-* ]]; then
    if [[ ! -f "$DRAFT" ]]; then
        echo "missing required file: $DRAFT" >&2
        exit 1
    fi
    SPEC_ARGS+=(--spec-draft-model "$DRAFT")
fi

exec "$LLAMA_SERVER" \
    --model "$MODEL" \
    "${SPEC_ARGS[@]}" \
    --spec-type "$SPEC_TYPE" \
    --spec-draft-n-max "$SPEC_DRAFT_N_MAX" \
    --spec-ngram-mod-n-min "$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" \
    --device "$DEVICE" \
    --gpu-layers "$N_GPU_LAYERS" \
    --fit off \
    --cache-type-k "$CACHE_TYPE_K" \
    --cache-type-v "$CACHE_TYPE_V" \
    --ctx-size "$CTX_SIZE" \
    --parallel "$PARALLEL" \
    --batch-size "$BATCH_SIZE" \
    --ubatch-size "$UBATCH_SIZE" \
    --temp "$TEMPERATURE" \
    --top-k "$TOP_K" \
    --top-p "$TOP_P" \
    --min-p "$MIN_P" \
    --threads "$THREADS" \
    --threads-http "$THREADS_HTTP" \
    --alias "$ALIAS" \
    --host "$HOST" \
    --port "$PORT"