"""Tool: block_resume – Recovery-Übersicht am Chat-Start (DB-backed)."""
from __future__ import annotations

import json
import os
from typing import Any, Dict, List, Optional

from helpers.tool import Tool, Response
from usr.plugins.a0_software_orchestrator.helpers.compact_protocol import get_resume_payload
from usr.plugins.a0_software_orchestrator.helpers.db_state_store import (
    get_project_id,
    get_status, list_next_steps, list_todos, list_errors, list_worklog,
    get_kv, get_block_compact,
)
from usr.plugins.a0_software_orchestrator.helpers.exceptions import PluginDBError


def _resolve_name(project_name: str = "", project_root: str = "") -> str:
    if project_name:
        return project_name.strip()
    if project_root:
        return os.path.basename(project_root.rstrip("/"))
    return os.path.basename(os.getcwd())


def _build_status_line(artifacts_state: Dict[str, bool]) -> str:
    parts: List[str] = []
    for key, ok in artifacts_state.items():
        marker = "✅" if ok else "❌"
        parts.append(f"{key}={marker}")
    return ", ".join(parts) if parts else "(none)"


class BlockResume(Tool):
    """Lädt die kompakte 10-Zeilen-Resume-Übersicht aus der DB.

    Args (kwargs):
        project_name (str): Projektname (bevorzugt).
        project_root (str): Legacy – wird zu basename() aufgelöst.
        include_full_resume (bool): Wenn True, zusätzlich resume_md ausgeben.
        include_conversation_summary (bool): Wenn True, zusätzlich conversation_summary_md.
    """

    async def execute(
        self,
        project_name: str = "",
        project_root: str = "",
        include_full_resume: bool = False,
        include_conversation_summary: bool = False,
        **kwargs,
    ):
        name = _resolve_name(project_name, project_root)
        try:
            pid = get_project_id(name)
            if pid is None:
                raise LookupError(f"project '{name}' is not registered")
        except (ValueError, LookupError) as e:
            return Response(message=f"ERROR: {e}", break_loop=False)

        except PluginDBError as e:
            return Response(message=f"Database error: {e}", break_loop=False)
        bc = get_block_compact(pid)
        status = get_status(pid)
        pending_steps = list_next_steps(pid, status="pending")
        open_todos = list_todos(pid, status="open")
        open_errors = list_errors(pid, status="open")
        recent_worklog = list_worklog(pid, limit=5)
        phase = get_kv(pid, "phase", default="<unknown>")

        # 10-Zeilen-Übersicht
        lines: List[str] = [f"🔁 RESUME: {name} (pid={pid}) — phase={phase}"]
        if bc:
            lines.append(
                f"  last block: {bc.get('last_block_id')} @ {bc.get('last_compact_at')}"
            )
            lines.append(f"  next block: {bc.get('next_block') or '(none)'}")
        else:
            lines.append("  no block_compact marker yet")
        lines.append(
            f"  status: {status or '(none)'}"
        )
        lines.append(
            f"  pending next_steps: {len(pending_steps)}, "
            f"open todos: {len(open_todos)}, open errors: {len(open_errors)}"
        )
        if bc:
            decisions = bc.get("decisions") or []
            key_findings = bc.get("key_findings") or []
            open_questions = bc.get("open_questions") or []
            lines.append(
                f"  last block decisions: {len(decisions)}, "
                f"key_findings: {len(key_findings)}, "
                f"open_questions: {len(open_questions)}"
            )

        # Optional: full resume + conversation summary
        if include_full_resume and bc and bc.get("resume_md"):
            lines.append("")
            lines.append("=== Full resume.md ===")
            lines.append(bc["resume_md"])

        if include_conversation_summary and bc and bc.get("conversation_summary_md"):
            lines.append("")
            lines.append("=== Conversation summary ===")
            lines.append(bc["conversation_summary_md"])

        # Recent worklog (top 5)
        if recent_worklog:
            lines.append("")
            lines.append("=== Recent worklog (top 5) ===")
            for w in recent_worklog:
                ts = w.get("created_at", "?")
                blk = w.get("work_block") or "-"
                agent = w.get("agent") or "-"
                summary = (w.get("summary") or "")[:100]
                lines.append(f"  - [{ts}] {blk} ({agent}): {summary}")

        # Hinweise für den Orchestrator
        lines.append("")
        lines.append("Hints:")
        lines.append("  - Don't re-run subagents for already-done blocks (see worklog).")
        lines.append("  - If pending_steps is empty, ask the user before continuing.")
        lines.append("  - If open_errors > 0, address them first.")

        return Response(message="\n".join(lines), break_loop=False)