#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
EXECUTE NOW — Execution Pipeline Starter
==========================================
Liest task_queue.json, fuehrt JEDEN Task aus, speichert Ergebnis + SHA-256,
aktualisiert task_queue.json (erledigt/fehlgeschlagen).

Usage:
    python autonomous/execute_now.py              # Alle Tasks
    python autonomous/execute_now.py --task task_001_query_esa  # Einzelner Task
    python autonomous/execute_now.py --report     # Nur Bericht anzeigen
    python autonomous/execute_now.py --reset      # Queue zuruecksetzen
"""
from __future__ import annotations

import json
import sys
import time
from datetime import datetime, timezone
from pathlib import Path

ROOT = Path(__file__).resolve().parent.parent
if str(ROOT) not in sys.path:
    sys.path.insert(0, str(ROOT))

from autonomous.execution_engine import TaskExecutor, TaskStatus
from autonomous.audit_chain import AuditChain
from autonomous.epistemic_state import EpistemicState


def main():
    import argparse

    parser = argparse.ArgumentParser(description="ORION Execution Pipeline — Tasks AUSFUEHREN")
    parser.add_argument("--task", type=str, default=None, help="Einzelnen Task ausfuehren (ID)")
    parser.add_argument("--report", action="store_true", help="Nur Bericht anzeigen")
    parser.add_argument("--reset", action="store_true", help="Task-Queue zuruecksetzen")
    parser.add_argument("--stop-on-error", action="store_true", help="Bei erstem Fehler stoppen")
    parser.add_argument("--queue", type=str, default=None, help="Pfad zur Task-Queue (default: autonomous/task_queue.json)")
    args = parser.parse_args()

    queue_path = Path(args.queue) if args.queue else ROOT / "autonomous" / "task_queue.json"

    # --report
    if args.report:
        if not queue_path.exists():
            print(f"Keine Task-Queue gefunden: {queue_path}")
            sys.exit(1)

        # Temporären Executor nur für Report
        executor = TaskExecutor(queue_path=queue_path)
        print(f"\n{'='*60}")
        print(f"  EXECUTION REPORT")
        print(f"  Queue: {queue_path}")
        print(f"{'='*60}\n")

        try:
            tasks = executor.load_queue()
            completed = sum(1 for t in tasks if t.get("status") == "completed")
            failed = sum(1 for t in tasks if t.get("status") == "failed")
            pending = sum(1 for t in tasks if t.get("status") == "pending")
            skipped = sum(1 for t in tasks if t.get("status") == "skipped")
            running = sum(1 for t in tasks if t.get("status") == "running")

            print(f"  Tasks gesamt:  {len(tasks)}")
            print(f"  Completed:     {completed}")
            print(f"  Failed:        {failed}")
            print(f"  Pending:       {pending}")
            print(f"  Skipped:       {skipped}")
            print(f"  Running:       {running}")
            print()

            for t in tasks:
                tid = t.get("id", t.get("task_id", "?"))
                status = t.get("status", "?")
                ttype = t.get("type", t.get("action", "?"))
                icon = {"completed": "OK", "failed": "FAIL", "pending": "PEND", "skipped": "SKIP", "running": "RUN"}.get(status, status)
                print(f"  [{icon}] {tid} ({ttype})")
                result = t.get("result", {})
                if result.get("sha256"):
                    print(f"       SHA-256: {result['sha256'][:40]}...")
                if result.get("error"):
                    print(f"       ERROR: {result['error'][:120]}")
                print()

        except Exception as exc:
            print(f"Fehler beim Laden: {exc}")
            sys.exit(1)
        return

    # --reset
    if args.reset:
        if not queue_path.exists():
            print(f"Keine Task-Queue gefunden: {queue_path}")
            sys.exit(1)

        data = json.loads(queue_path.read_text(encoding="utf-8"))
        tasks = data.get("tasks", []) if isinstance(data, dict) else data
        for t in tasks:
            t["status"] = "pending"
            t.pop("result", None)
            t.pop("started_at", None)
            t.pop("completed_at", None)

        executor = TaskExecutor(queue_path=queue_path)
        executor.save_queue(tasks)
        print(f"Task-Queue zurueckgesetzt: {len(tasks)} Tasks auf pending")
        return

    # ── Execution ──────────────────────────────────────────────────────

    if not queue_path.exists():
        print(f"Fehler: Task-Queue nicht gefunden: {queue_path}")
        print(f"Erstelle leere Queue...")
        queue_path.write_text(json.dumps({"tasks": []}, indent=2), encoding="utf-8")
        sys.exit(1)

    # Executor initialisieren
    audit = AuditChain(agent_id=1, agent_name="TaskExecutor")
    epistemic = EpistemicState(agent_id=1, agent_name="TaskExecutor")
    executor = TaskExecutor(
        queue_path=queue_path,
        audit_chain=audit,
        epistemic=epistemic,
        agent_id=1,
        agent_name="TaskExecutor",
    )

    start_time = time.monotonic()

    if args.task:
        # Einzelnen Task ausführen
        print(f"\n  Führe einzelnen Task aus: {args.task}")
        try:
            result = executor.execute_single(args.task)
            print(f"  Status: {result.status.value}")
            if result.sha256:
                print(f"  SHA-256: {result.sha256}")
            if result.error:
                print(f"  ERROR: {result.error}")
        except ValueError as exc:
            print(f"  Task nicht gefunden: {exc}")
            sys.exit(1)
    else:
        # Alle Tasks ausführen
        results = executor.execute_all(stop_on_error=args.stop_on_error)

    elapsed = (time.monotonic() - start_time) * 1000

    # Abschlussbericht
    report = executor.get_report()
    report["elapsed_ms"] = round(elapsed, 1)

    report_path = ROOT / "output" / f"execution_report_{datetime.now().strftime('%Y-%m-%d')}.json"
    report_path.parent.mkdir(parents=True, exist_ok=True)
    report_path.write_text(json.dumps(report, indent=2, ensure_ascii=False), encoding="utf-8")
    print(f"  Report gespeichert: {report_path}")

    # Audit speichern
    audit.save()

    # Exit-Code
    failed = sum(1 for r in report["results"] if r["status"] == "failed")
    sys.exit(1 if failed > 0 else 0)


if __name__ == "__main__":
    main()