#!/usr/bin/env bash
# lem-eval.sh — the worker service script
#
# Iterates the targets owned by this hostname (from targets.yaml), runs one
# canon-advance slice for each, and pushes results to both the target model
# repo and the lthn/LEM-benchmarks aggregator.
#
# Usage:
#   ./lem-eval.sh once          # one pass over all owned targets, exit
#   ./lem-eval.sh maintain      # git pull LEM-Eval + lem-benchmarks, no eval
#   ./lem-eval.sh loop          # once, sleep 10s, repeat (for systemd-style runs)
#
# Environment filters (comma-separated):
#   LEM_TYPES=gguf              # only run gguf targets (auto-detected if unset)
#   LEM_NAMES=lemer             # only run targets named "lemer"
#   LEM_NAMES=lemer,lemma       # run both lemer and lemma targets
#   LEM_TASK=toxigen            # override task (default: from targets.yaml)
#
# Designed for cron:
#   */30 * * * *  cd /home/x/LEM-Eval && flock -n .lock ./lem-eval.sh once
#   15    * * * *  cd /home/x/LEM-Eval && ./lem-eval.sh maintain

set -euo pipefail

HERE="$(cd "$(dirname "$0")" && pwd)"
cd "$HERE"

# Cron runs with a minimal PATH — make sure uv + user-local bins are
# available regardless of how this script is invoked.
if [[ ":$PATH:" != *":$HOME/.local/bin:"* ]]; then
    export PATH="$HOME/.local/bin:$PATH"
fi

MODE="${1:-once}"
HOST="$(hostname)"
LEM_BENCHMARKS_DIR="$HERE/lem-benchmarks"
WORKSPACES="$HERE/workspaces"

log() { printf "\033[1;32m[lem-eval %s]\033[0m %s\n" "$(date -u +%H:%M:%S)" "$*"; }

# --- maintain: pull LEM-Eval + lem-benchmarks clones ----------------------

maintain() {
    log "git pull LEM-Eval"
    git pull --ff-only || log "LEM-Eval pull failed (non-fatal)"
    if [[ -d "$LEM_BENCHMARKS_DIR/.git" ]]; then
        log "git pull lem-benchmarks"
        (cd "$LEM_BENCHMARKS_DIR" && git pull --ff-only) || log "lem-benchmarks pull failed (non-fatal)"
    fi
}

# --- run one slice for a single (name, type, quant) triple --------------

run_target() {
    local name="$1" ttype="$2" quant="$3" repo="$4"
    local workspace="$WORKSPACES/$repo"
    local label="$name/$ttype/$quant"

    if [[ ! -d "$workspace/.git" ]]; then
        log "[$label] workspace $repo not cloned, skipping (run install.sh first)"
        return 0
    fi

    log "[$label] git pull $repo"
    (cd "$workspace" && git pull --ff-only) || {
        log "[$label] pull failed, skipping"
        return 0
    }

    log "[$label] running eval.py..."
    # || true so a single target failure (missing model, probe crash,
    # network hiccup) doesn't cascade via set -euo pipefail and kill
    # the outer loop. Each target is independent — the next one in the
    # rotation should still get its chance this pass.
    local task_args=()
    if [[ -n "${LEM_TASK:-}" ]]; then
        task_args=(--task "$LEM_TASK")
    fi

    if ! uv run --script eval.py \
        --target "$name" \
        --type "$ttype" \
        --quant "$quant" \
        --eval-results-dir "$workspace/.eval_results" \
        --lem-benchmarks-dir "$LEM_BENCHMARKS_DIR" \
        --n-questions 1 \
        --rounds 8 \
        "${task_args[@]}"; then
        log "[$label] eval.py failed — continuing with next target"
        return 0
    fi

    # Commit + push to target model repo (canon advance for this quant)
    if (cd "$workspace" && git status --short | grep -q .); then
        log "[$label] committing canon update to $repo"
        (cd "$workspace" \
            && git add .eval_results/ \
            && git commit -m "eval: ${name}/${ttype}/${quant} advance ($(date -u +%Y-%m-%dT%H:%M:%SZ))" \
            && git push) || log "[$label] model repo push failed (non-fatal)"
    fi

    # Commit + push to lem-benchmarks for the aggregator row
    if (cd "$LEM_BENCHMARKS_DIR" && git status --short | grep -q .); then
        log "[$label] committing canon update to lem-benchmarks"
        (cd "$LEM_BENCHMARKS_DIR" \
            && git add "results/$name/" \
            && git commit -m "eval: ${name}/${ttype}/${quant} advance ($(date -u +%Y-%m-%dT%H:%M:%SZ))" \
            && git push) || log "[$label] lem-benchmarks push failed (non-fatal)"
    fi
}

# --- one pass over all targets this worker can run -----------------------
#
# Iterates every (name, type, quant) triple whose type matches this
# worker's capability set — $LEM_TYPES env var overrides, otherwise
# capability probe (mlx on Apple Silicon with mlx_lm importable, gguf
# everywhere the openai client is importable).

once() {
    log "host=$HOST types=${LEM_TYPES:-auto} names=${LEM_NAMES:-all} mode=once"

    if [[ ! -d "$LEM_BENCHMARKS_DIR/.git" ]]; then
        log "lem-benchmarks not cloned — run ./install.sh first"
        exit 1
    fi

    # Emit one pipe-separated line per runnable target: name|type|quant|repo
    local triples
    triples=$(LEM_TYPES="${LEM_TYPES:-}" LEM_NAMES="${LEM_NAMES:-}" python3 - <<'PY'
import os, platform, yaml

types_env = os.environ.get("LEM_TYPES", "").strip()
if types_env:
    allowed_types = set(t.strip() for t in types_env.split(","))
else:
    allowed_types = set()
    if platform.system() == "Darwin":
        try:
            import mlx_lm  # noqa: F401
            allowed_types.add("mlx")
        except ImportError:
            pass
    if any(os.path.exists(os.path.join(p, "ollama"))
           for p in os.environ.get("PATH", "").split(":")):
        allowed_types.add("gguf")

names_env = os.environ.get("LEM_NAMES", "").strip()
allowed_names = set(n.strip() for n in names_env.split(",")) if names_env else None

def derive_repo_id(this_ref):
    if this_ref.startswith("hf.co/"):
        base = this_ref[len("hf.co/"):]
        if ":" in base:
            base = base.split(":", 1)[0]
        return base
    return this_ref

with open("targets.yaml") as f:
    cfg = yaml.safe_load(f)
for t in cfg.get("targets", []):
    if t.get("type") not in allowed_types:
        continue
    if allowed_names and t["name"] not in allowed_names:
        continue
    name = t["name"]
    ttype = t["type"]
    quant = t.get("quant", "")
    repo = derive_repo_id(t["this"])
    print(f"{name}|{ttype}|{quant}|{repo}")
PY
    )

    if [[ -z "$triples" ]]; then
        log "no targets match this worker's types (set LEM_TYPES to override)"
        exit 0
    fi

    while IFS='|' read -r name ttype quant repo; do
        [[ -z "$name" ]] && continue
        run_target "$name" "$ttype" "$quant" "$repo"
    done <<< "$triples"

    log "pass complete"
}

# --- main dispatch --------------------------------------------------------

case "$MODE" in
    once)
        once
        ;;
    maintain)
        maintain
        ;;
    loop)
        # Continuous worker: run one pass after another with no long sleep.
        # Each pass iterates every runnable target on this host and commits
        # + pushes after each target's eval, so the canon on HF stays in
        # lockstep with the local state. A brief breather prevents a hot
        # loop if something misconfigures — 10 seconds is enough to not
        # thrash cron/logs but short enough that the machine stays busy.
        while true; do
            once
            sleep 10
        done
        ;;
    *)
        echo "usage: $0 {once|maintain|loop}" >&2
        exit 1
        ;;
esac