#!/usr/bin/env bash
# Capture pre-optimization baseline benchmark
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "$SCRIPT_DIR/../../lib/common.sh"
source "$SCRIPT_DIR/../../lib/detect.sh"
source "$SCRIPT_DIR/../../lib/format.sh"

MODEL_DIR="$(data_dir models)"
TS="$(timestamp)"
RESULT_DIR="$(data_dir baselines)/$TS"
mkdir -p "$RESULT_DIR"

REPS_STANDARD=5
REPS_LONGCTX=3
SKIP_LONGCTX=false
MAX_SIZE_GB=0  # 0 = no limit
CATEGORY_FILTER=""
CTX_DEPTH=32768
CTX_PROMPT=2048
PP_TOKENS=512
TG_TOKENS=128
BATCH_SIZE=""    # Batch size override (-b flag, empty = llama-bench default 2048)
KV_TYPES_RAW=""  # Comma-separated KV cache types to sweep (e.g. f16,q8_0,q4_0 or q4_0:q8_0)

while [[ $# -gt 0 ]]; do
    case "$1" in
        --skip-longctx)  SKIP_LONGCTX=true; shift ;;
        --max-size|-s)   MAX_SIZE_GB="$2"; shift 2 ;;
        --category|-c)   CATEGORY_FILTER="$2"; shift 2 ;;
        --reps|-r)       REPS_STANDARD="$2"; shift 2 ;;
        --context|-d)    CTX_DEPTH="$2"; shift 2 ;;
        --pp)            PP_TOKENS="$2"; shift 2 ;;
        --tg)            TG_TOKENS="$2"; shift 2 ;;
        -b|--batch)      BATCH_SIZE="$2"; shift 2 ;;
        --kv-types)      KV_TYPES_RAW="$2"; shift 2 ;;
        --help|-h)
            echo "Usage: run-baseline.sh [OPTIONS]"
            echo ""
            echo "Options:"
            echo "  --skip-longctx       Skip long-context tests"
            echo "  --max-size GB        Only bench models up to this file size in GB"
            echo "  --category LIST      Comma-separated: smoke,dense,moe (from models.conf)"
            echo "  --reps N             Standard test repetitions (default: 5)"
            echo "  --context N          Long-context depth in tokens (default: 32768)"
            echo "  --pp N               Prompt processing tokens (default: 512)"
            echo "  --tg N               Token generation count (default: 128)"
            echo "  -b, --batch N        Batch size (default: 2048, try 256 for MoE)"
            echo "  --kv-types LIST      KV cache sweep: comma-separated types to test"
            echo "                       Each entry: TYPE (both K+V) or K_TYPE:V_TYPE"
            echo "                       Types: f16, q8_0, q4_0, q4_1"
            echo ""
            echo "Examples:"
            echo "  run-baseline.sh --max-size 20               # Only models ≤20 GB"
            echo "  run-baseline.sh --context 131072 --category moe  # 128K context on MoE"
            echo "  run-baseline.sh --tg 1024 --pp 2048 --category moe  # Realistic agentic"
            echo "  run-baseline.sh --kv-types f16,q8_0,q4_0 --context 131072  # KV sweep"
            echo "  run-baseline.sh --skip-longctx --max-size 15 # Quick safe run"
            exit 0 ;;
        *) log_warn "Unknown argument: $1"; shift ;;
    esac
done

# Scale prompt tokens for large contexts: ~1/16 of depth, min 512
if (( CTX_DEPTH > 32768 )); then
    CTX_PROMPT=$(( CTX_DEPTH / 16 ))
    (( CTX_PROMPT < 512 )) && CTX_PROMPT=512
fi

# Parse KV cache types for sweep
if [[ -n "$KV_TYPES_RAW" ]]; then
    IFS=',' read -ra KV_TYPES <<< "$KV_TYPES_RAW"
else
    KV_TYPES=("f16")
fi

log_header "Baseline Benchmark Capture"
log_info "Results will be saved to: $RESULT_DIR"
$SKIP_LONGCTX && log_info "Long-context tests: SKIPPED"
(( MAX_SIZE_GB > 0 )) && log_info "Max model size: ${MAX_SIZE_GB} GB"
[[ -n "$CATEGORY_FILTER" ]] && log_info "Categories: $CATEGORY_FILTER"
(( ${#KV_TYPES[@]} > 1 )) && log_info "KV cache sweep: ${KV_TYPES[*]}"

# ── 1. Save system state ────────────────────────────────
log_info "Capturing system state..."
bash "$SCRIPT_DIR/../audit/system-report.sh" --json > "$RESULT_DIR/system-state.json" 2>/dev/null

# ── 2. Discover available toolboxes ─────────────────────
existing="$(detect_toolbox_names 2>/dev/null || true)"

declare -A BENCH_PATHS=(
    [llama-vulkan-radv]="/usr/sbin/llama-bench"
    [llama-vulkan-amdvlk]="/usr/sbin/llama-bench"
    [llama-rocm-6.4.4]="/usr/local/bin/llama-bench"
    [llama-rocm-7.2]="/usr/local/bin/llama-bench"
    [llama-rocm7-nightlies]="/usr/local/bin/llama-bench"
)

available_backends=()
for tb in "${!BENCH_PATHS[@]}"; do
    if echo "$existing" | grep -q "^${tb}$"; then
        available_backends+=("$tb")
        log_success "Backend: $tb"
    fi
done

if (( ${#available_backends[@]} == 0 )); then
    log_error "No toolbox backends found. Run: make benchmark-setup"
    exit 1
fi

# ── 3. Discover and filter models ───────────────────────
mapfile -t ALL_MODEL_PATHS < <(
    find -L "$MODEL_DIR" -type f -name '*.gguf' -not -name 'mmproj-*' \
        \( -name '*-00001-of-*.gguf' -o -not -name '*-000*-of-*.gguf' \) \
        | sort
)

MODEL_PATHS=()
for p in "${ALL_MODEL_PATHS[@]}"; do
    # Size filter
    if (( MAX_SIZE_GB > 0 )); then
        file_size_bytes=$(stat -Lc%s "$p" 2>/dev/null || echo 0)
        file_size_gb=$(( file_size_bytes / 1073741824 ))
        if (( file_size_gb >= MAX_SIZE_GB )); then
            log_info "Skipping $(basename "$p") ($(( file_size_gb )) GB > ${MAX_SIZE_GB} GB limit)"
            continue
        fi
    fi

    # Category filter (match against models.conf if available)
    if [[ -n "$CATEGORY_FILTER" ]]; then
        local_name="$(basename "$p")"
        matched=false
        if [[ -f "$PROJECT_ROOT/configs/models.conf" ]]; then
            while IFS='|' read -r name repo file size_gb category desc; do
                [[ "$name" =~ ^#.*$ || -z "$name" ]] && continue
                if [[ "$local_name" == "$file" ]]; then
                    if echo "$CATEGORY_FILTER" | tr ',' '\n' | grep -qF "$category"; then
                        matched=true
                    fi
                    break
                fi
            done < "$PROJECT_ROOT/configs/models.conf"
        fi
        # If model not in catalog, include it (don't filter unknowns)
        if ! $matched; then
            # Check if we found it in catalog at all
            found_in_catalog=false
            while IFS='|' read -r name repo file size_gb category desc; do
                [[ "$name" =~ ^#.*$ || -z "$name" ]] && continue
                [[ "$local_name" == "$file" ]] && found_in_catalog=true && break
            done < "$PROJECT_ROOT/configs/models.conf"
            if $found_in_catalog; then
                log_info "Skipping $(basename "$p") (category not in: $CATEGORY_FILTER)"
                continue
            fi
        fi
    fi

    MODEL_PATHS+=("$p")
done

if (( ${#MODEL_PATHS[@]} == 0 )); then
    log_error "No models matched filters. Adjust --max-size or --category"
    exit 1
fi

log_info "Benchmarking ${#MODEL_PATHS[@]} model(s):"
for p in "${MODEL_PATHS[@]}"; do
    file_size_bytes=$(stat -Lc%s "$p" 2>/dev/null || echo 0)
    printf "  %s (%.1f GB)\n" "$(basename "$p")" "$(echo "scale=1; $file_size_bytes / 1073741824" | bc)"
done

# ── 4. Start metric logging ─────────────────────────────
METRICS_FILE="$RESULT_DIR/metrics.csv"
bash "$SCRIPT_DIR/../monitor/log-metrics.sh" --output "$METRICS_FILE" --interval 2 &
METRICS_PID=$!
log_info "Metric logger started (PID: $METRICS_PID)"

cleanup() {
    kill "$METRICS_PID" 2>/dev/null || true
    wait "$METRICS_PID" 2>/dev/null || true
}
trap 'cleanup; exit 0' EXIT

# ── 5. Run benchmarks ───────────────────────────────────
for MODEL_PATH in "${MODEL_PATHS[@]}"; do
    MODEL_NAME="$(basename "$MODEL_PATH" .gguf)"

    for BACKEND in "${available_backends[@]}"; do
        BENCH_BIN="${BENCH_PATHS[$BACKEND]}"
        BACKEND_SAFE="${BACKEND//[.-]/_}"

        # Build environment args for ROCm backends
        ENV_ARGS=()
        if [[ "$BACKEND" == *rocm* ]]; then
            ENV_ARGS=(env ROCBLAS_USE_HIPBLASLT=1)
        fi

        # Resolve model path for toolbox (host paths need /run/host/ prefix)
        TOOLBOX_MODEL_PATH="$(realpath "$MODEL_PATH")"
        if [[ "$TOOLBOX_MODEL_PATH" != /home/* ]]; then
            TOOLBOX_MODEL_PATH="/run/host${TOOLBOX_MODEL_PATH}"
        fi

        for KV_SPEC in "${KV_TYPES[@]}"; do
            # Parse KV spec: "q8_0" → K=q8_0,V=q8_0 or "q4_0:q8_0" → K=q4_0,V=q8_0
            if [[ "$KV_SPEC" == *:* ]]; then
                KV_K="${KV_SPEC%%:*}"
                KV_V="${KV_SPEC##*:}"
            else
                KV_K="$KV_SPEC"
                KV_V="$KV_SPEC"
            fi

            # Build KV cache args (skip for f16 — it's the default)
            KV_ARGS=()
            KV_SUFFIX=""
            if [[ "$KV_K" != "f16" || "$KV_V" != "f16" ]]; then
                KV_ARGS+=(-ctk "$KV_K" -ctv "$KV_V")
                KV_SUFFIX="__kv_${KV_K}-${KV_V}"
            fi

            # Build batch size args
            BATCH_ARGS=()
            BATCH_SUFFIX=""
            if [[ -n "$BATCH_SIZE" ]]; then
                BATCH_ARGS+=(-b "$BATCH_SIZE")
                BATCH_SUFFIX="__b${BATCH_SIZE}"
            fi

            # Standard test
            local_suffix="fa1"
            [[ "$PP_TOKENS" != "512" || "$TG_TOKENS" != "128" ]] && local_suffix="fa1__pp${PP_TOKENS}_tg${TG_TOKENS}"
            OUT="$RESULT_DIR/${MODEL_NAME}__${BACKEND_SAFE}__${local_suffix}${KV_SUFFIX}${BATCH_SUFFIX}.log"
            if [[ ! -s "$OUT" ]]; then
                printf "\n${BOLD}>> [%s] %s — pp%s/tg%s  KV=%s${RESET}\n" \
                    "$BACKEND" "$MODEL_NAME" "$PP_TOKENS" "$TG_TOKENS" "${KV_K}/${KV_V}"
                CMD=(toolbox run -c "$BACKEND" -- "${ENV_ARGS[@]}" "$BENCH_BIN"
                    -ngl 99 -mmp 0 -m "$TOOLBOX_MODEL_PATH" -fa 1
                    -p "$PP_TOKENS" -n "$TG_TOKENS" -r "$REPS_STANDARD" "${BATCH_ARGS[@]}" "${KV_ARGS[@]}")

                printf "  cmd: %s\n" "${CMD[*]}"
                if "${CMD[@]}" > "$OUT" 2>&1; then
                    log_success "Standard test complete"
                    tail -5 "$OUT"
                else
                    log_error "Standard test failed (exit $?)"
                    echo "FAILED" >> "$OUT"
                fi
            else
                log_info "Skipping standard test (log exists): $OUT"
            fi

            # Long-context test
            if $SKIP_LONGCTX; then
                continue
            fi

            OUT_LC="$RESULT_DIR/${MODEL_NAME}__${BACKEND_SAFE}__fa1__longctx${CTX_DEPTH}${KV_SUFFIX}${BATCH_SUFFIX}.log"
            if [[ ! -s "$OUT_LC" ]]; then
                printf "\n${BOLD}>> [%s] %s — long-context %s  KV=%s${RESET}\n" \
                    "$BACKEND" "$MODEL_NAME" "$CTX_DEPTH" "${KV_K}/${KV_V}"

                UB_SIZE=2048
                [[ "$BACKEND" == *vulkan* ]] && UB_SIZE=512

                CMD_LC=(toolbox run -c "$BACKEND" -- "${ENV_ARGS[@]}" "$BENCH_BIN"
                    -ngl 99 -mmp 0 -m "$TOOLBOX_MODEL_PATH" -fa 1
                    -p "$CTX_PROMPT" -n 32 -d "$CTX_DEPTH" -ub "$UB_SIZE"
                    -r "$REPS_LONGCTX" "${KV_ARGS[@]}")

                printf "  cmd: %s\n" "${CMD_LC[*]}"
                if "${CMD_LC[@]}" > "$OUT_LC" 2>&1; then
                    log_success "Long-context test complete"
                    tail -5 "$OUT_LC"
                else
                    log_error "Long-context test failed (exit $?)"
                    echo "FAILED" >> "$OUT_LC"
                fi
            else
                log_info "Skipping long-context test (log exists): $OUT_LC"
            fi
        done  # KV_TYPES
    done
done

# ── 6. Parse results into summary JSON ──────────────────
log_info "Parsing results..."
SUMMARY="$RESULT_DIR/summary.json"

python3 - "$RESULT_DIR" > "$SUMMARY" << 'PYEOF'
import sys, os, re, json
from pathlib import Path

result_dir = Path(sys.argv[1])
results = []

for logfile in sorted(result_dir.glob("*.log")):
    content = logfile.read_text()
    if "FAILED" in content:
        continue

    # Extract KV cache type from filename (__kv_q8_0-q8_0)
    kv_match = re.search(r'__kv_(.+)-(.+)\.log$', logfile.name)
    kv_type = f"{kv_match.group(1)}/{kv_match.group(2)}" if kv_match else "f16/f16"

    for line in content.splitlines():
        line = line.strip()
        if not line.startswith("|") or ("model" in line.lower() and "size" in line.lower()):
            continue
        if "---" in line:
            continue

        parts = [p.strip() for p in line.split("|")]
        # Filter out empty parts from leading/trailing pipes
        data = [p for p in parts if p and "---" not in p]
        if len(data) < 6:
            continue

        try:
            # test and t/s are always the last two columns
            test_type = data[-2]
            ts_raw = data[-1]
            if not test_type or not ts_raw:
                continue

            ts_match = re.match(r'([\d.]+)', ts_raw)
            if not ts_match:
                continue

            results.append({
                "file": logfile.name,
                "model": data[0],
                "size": data[1],
                "backend": data[3],
                "test": test_type,
                "tokens_per_sec": float(ts_match.group(1)),
                "kv_cache": kv_type,
                "raw": ts_raw,
            })
        except (ValueError, IndexError):
            continue

print(json.dumps({"results": results}, indent=2))
PYEOF

# ── 7. Display summary ──────────────────────────────────
log_header "Baseline Results"

python3 - "$SUMMARY" << 'PYEOF'
import sys, json

with open(sys.argv[1]) as f:
    data = json.load(f)

if not data["results"]:
    print("  No results parsed. Check log files for errors.")
    sys.exit(0)

fmt = "  {:<20} {:<16} {:<10} {:<8} {:>10}"
print(fmt.format("Model", "Backend", "KV cache", "Test", "t/s"))
print("  " + "-" * 68)
for r in data["results"]:
    print(fmt.format(
        r["model"][:20],
        r["backend"][:16],
        r.get("kv_cache", "f16/f16")[:10],
        r["test"],
        f"{r['tokens_per_sec']:.2f}"
    ))
PYEOF

echo ""
log_success "Baseline saved to: $RESULT_DIR"
log_info "Files: system-state.json, summary.json, metrics.csv, *.log"
log_info "Compare later with: bin/benchmark compare $RESULT_DIR <new-run-dir>"