#!/usr/bin/env bash
# Plukk neste oppgave fra tasks/ og kjør med Claude Code.
# Bruk:
#   ./scripts/run-next-task.sh           # kjør én oppgave
#   ./scripts/run-next-task.sh --loop    # kjør oppgaver i loop
#   ./scripts/run-next-task.sh --dry     # vis neste uten å kjøre
#   ./scripts/run-next-task.sh --status  # vis status

set -euo pipefail

ROOT="$(cd "$(dirname "$0")/.." && pwd)"
TASKS="$ROOT/tasks"
ACTIVE="$TASKS/active"
DONE="$TASKS/done"
LOGS="$ROOT/logs"
LOCKFILE="/tmp/synops-task-runner.lock"

mkdir -p "$ACTIVE" "$DONE" "$LOGS"

# Lås — hindrer dobbeltstart
if [ -f "$LOCKFILE" ]; then
    PID=$(cat "$LOCKFILE" 2>/dev/null || echo "")
    if [ -n "$PID" ] && kill -0 "$PID" 2>/dev/null; then
        echo "Allerede en task-runner aktiv (PID $PID)"
        exit 0
    fi
    rm -f "$LOCKFILE"
fi
echo $$ > "$LOCKFILE"
trap 'rm -f "$LOCKFILE"' EXIT

# --- Krasj-deteksjon: frigjør stale oppgaver ---
unstale() {
    for f in "$ACTIVE"/*.md; do
        [ -f "$f" ] || continue
        age_min=$(( ($(date +%s) - $(stat -c %Y "$f")) / 60 ))
        if [ "$age_min" -gt 60 ]; then
            echo "Frigjør stale oppgave: $(basename "$f") ($age_min min)"
            mv "$f" "$TASKS/"
        fi
    done
}

# --- Status ---
if [[ "${1:-}" == "--status" ]]; then
    todo=$(ls "$TASKS"/*.md 2>/dev/null | grep -v README | wc -l)
    active=$(ls "$ACTIVE"/*.md 2>/dev/null | wc -l)
    done_count=$(ls "$DONE"/*.md 2>/dev/null | wc -l)
    echo "=== Synops oppgavestatus ==="
    echo "Gjenstår:  $todo"
    echo "Aktiv:     $active"
    echo "Fullført:  $done_count"
    if [ "$active" -gt 0 ]; then
        echo ""
        echo "--- Aktive ---"
        ls "$ACTIVE"/*.md 2>/dev/null | xargs -I{} basename {}
    fi
    echo ""
    echo "--- Neste 5 ---"
    ls "$TASKS"/*.md 2>/dev/null | grep -v README | sort | head -5 | xargs -I{} basename {}
    exit 0
fi

# --- Kjør én oppgave ---
run_one() {
    unstale

    TASK=$(ls "$TASKS"/*.md 2>/dev/null | grep -v README | sort | head -1)
    if [ -z "$TASK" ]; then
        echo "Ingen oppgaver å gjøre"
        return 1
    fi

    TASKNAME=$(basename "$TASK")
    echo "=== Plukker: $TASKNAME ==="

    if [[ "${1:-}" == "--dry" ]]; then
        cat "$TASK"
        return 0
    fi

    # Flytt til active
    mv "$TASK" "$ACTIVE/$TASKNAME"

    TASK_CONTENT=$(cat "$ACTIVE/$TASKNAME")

    cd "$ROOT"
    git pull origin main 2>/dev/null || true

    # Kjør Claude Code
    LOGFILE="$LOGS/task-$(date +%Y%m%d-%H%M)-$TASKNAME.log"

    timeout 1800 claude -p "
Du har fått denne oppgaven:

$TASK_CONTENT

Arbeidsmappe: $ROOT

Arbeidsflyt:
1. Les CLAUDE.md for prosjektkontekst
2. Les refererte docs/proposals
3. Implementer
4. Verifiser (cargo check, npm run build)
5. Commit og push
6. Rapporter hva du gjorde

Regler:
- Les relevante filer før du endrer dem
- Gjør minimale, fokuserte endringer
- Push jevnlig underveis
" --dangerously-skip-permissions 2>&1 | tee "$LOGFILE"

    EXIT_CODE=${PIPESTATUS[0]}

    # Verifiser at det faktisk ble gjort kodeendringer (ikke bare snakk)
    cd "$ROOT"
    COMMITS_AFTER=$(git log --oneline --since="5 minutes ago" -- ':(exclude)tasks/' | wc -l)
    FILES_CHANGED=$(git diff --name-only HEAD~${COMMITS_AFTER:-1}..HEAD -- ':(exclude)tasks/' 2>/dev/null | wc -l)

    if [ "$EXIT_CODE" -eq 0 ] && [ "${FILES_CHANGED:-0}" -gt 0 ]; then
        mv "$ACTIVE/$TASKNAME" "$DONE/$(date +%Y-%m-%d)-$TASKNAME"
        echo "=== Fullført: $TASKNAME ($FILES_CHANGED filer endret, $COMMITS_AFTER commits) ==="
        git add -A tasks/ && git commit -m "Task fullført: $TASKNAME" --no-verify 2>/dev/null || true
        git push origin main 2>/dev/null || true
        return 0
    else
        mv "$ACTIVE/$TASKNAME" "$TASKS/$TASKNAME"
        if [ "$EXIT_CODE" -ne 0 ]; then
            echo "=== Feilet (exit $EXIT_CODE): $TASKNAME ==="
        else
            echo "=== Ingen kodeendring: $TASKNAME (flyttet tilbake til kø) ==="
        fi
        return 1
    fi
}

# --- Dry run ---
if [[ "${1:-}" == "--dry" ]]; then
    unstale
    TASK=$(ls "$TASKS"/*.md 2>/dev/null | grep -v README | sort | head -1)
    if [ -z "$TASK" ]; then
        echo "Ingen oppgaver"
    else
        echo "Neste: $(basename "$TASK")"
        echo "---"
        cat "$TASK"
    fi
    exit 0
fi

# --- Loop-modus ---
if [[ "${1:-}" == "--loop" ]]; then
    echo "=== Task runner loop startet ($(date)) ==="
    while true; do
        if ! run_one; then
            echo "Ingen flere oppgaver eller feil. Venter 5 min..."
            sleep 300
        else
            echo "Venter 30 sek før neste oppgave..."
            sleep 30
        fi
    done
fi

# --- Enkel kjøring ---
run_one