#!/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

log_header "Baseline Benchmark Capture"
log_info "Results will be saved to: $RESULT_DIR"

# ── 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 and models ──────────
existing="$(detect_toolbox_names 2>/dev/null || true)"

# Map toolbox names to llama-bench commands (same pattern as upstream)
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

# Find models
mapfile -t MODEL_PATHS < <(
    find "$MODEL_DIR" -type f -name '*.gguf' \
        \( -name '*-00001-of-*.gguf' -o -not -name '*-000*-of-*.gguf' \) \
        | sort
)

if (( ${#MODEL_PATHS[@]} == 0 )); then
    log_error "No GGUF models found in $MODEL_DIR. Run: make benchmark-setup"
    exit 1
fi

log_info "Found ${#MODEL_PATHS[@]} model(s):"
for p in "${MODEL_PATHS[@]}"; do
    printf "  %s (%s)\n" "$(basename "$p")" "$(du -h "$p" | cut -f1)"
done

# ── 3. 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

# ── 4. 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

        # Standard test (pp512 + tg128, default context)
        OUT="$RESULT_DIR/${MODEL_NAME}__${BACKEND_SAFE}__fa1.log"
        if [[ ! -s "$OUT" ]]; then
            printf "\n${BOLD}>> [%s] %s — standard test${RESET}\n" "$BACKEND" "$MODEL_NAME"
            CMD=(toolbox run -c "$BACKEND" -- "${ENV_ARGS[@]}" "$BENCH_BIN"
                -ngl 99 -mmp 0 -m "$MODEL_PATH" -fa 1 -r "$REPS_STANDARD")

            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 (pp2048, tg32, ctx 32768)
        OUT_LC="$RESULT_DIR/${MODEL_NAME}__${BACKEND_SAFE}__fa1__longctx32768.log"
        if [[ ! -s "$OUT_LC" ]]; then
            printf "\n${BOLD}>> [%s] %s — long-context test${RESET}\n" "$BACKEND" "$MODEL_NAME"

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

            CMD_LC=(toolbox run -c "$BACKEND" -- "${ENV_ARGS[@]}" "$BENCH_BIN"
                -ngl 99 -mmp 0 -m "$MODEL_PATH" -fa 1
                -p 2048 -n 32 -d 32768 -ub "$UB_SIZE"
                -r "$REPS_LONGCTX")

            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
done

# ── 5. 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

    # Parse the pipe-delimited llama-bench table
    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("|")]
        if len(parts) < 10:
            continue

        # Columns: | model | size | params | backend | ngl | fa | mmap | test | t/s |
        try:
            test_type = parts[8].strip() if len(parts) > 8 else ""
            ts_raw = parts[9].strip() if len(parts) > 9 else ""
            if not test_type or not ts_raw:
                continue

            # Parse "548.18 +/- 1.59" or just "548.18"
            ts_match = re.match(r'([\d.]+)', ts_raw)
            if not ts_match:
                continue

            results.append({
                "file": logfile.name,
                "model": parts[1].strip(),
                "size": parts[2].strip(),
                "backend": parts[4].strip(),
                "test": test_type,
                "tokens_per_sec": float(ts_match.group(1)),
                "raw": ts_raw,
            })
        except (ValueError, IndexError):
            continue

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

# ── 6. 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)

# Print table
fmt = "  {:<20} {:<16} {:<8} {:>10}"
print(fmt.format("Model", "Backend", "Test", "t/s"))
print("  " + "-" * 58)
for r in data["results"]:
    print(fmt.format(
        r["model"][:20],
        r["backend"][:16],
        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>"