"""Tool: read/update entries inside orch_kv (DB-backed, replaces .a0/*.json)."""
from __future__ import annotations

import json
import os

from helpers.tool import Tool, Response
from usr.plugins.a0_software_orchestrator.helpers.db_state_store import (
    get_project_id,
    get_kv, set_kv, delete_kv, list_kv_keys,
    set_status as db_set_status, get_status as db_get_status,
)
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())


class OrchestratorState(Tool):
    """Read or update KV-entries for a project in `orch_kv` (patterns.db).

    Args (kwargs):
        project_name (str): Projektname (bevorzugt).
        project_root (str): Legacy – wird zu basename() aufgelöst.
        action (str): "read", "update", "delete", "list_keys" (default "read").
        key (str): Schlüssel-Name (z.B. "phase", "orchestrator_mode",
                                       "task_graph", "tool_capabilities").
                  Bei "read" ohne key: gibt alle Keys+Values als Dict zurück.
        value (str|dict): JSON-string oder dict für action=update.
    """

    async def execute(
        self,
        project_name: str = "",
        project_root: str = "",
        action: str = "read",
        key: str = "",
        value: str = "",
        **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)
        if action == "set_phase":
            action = "update"
            key = "phase"
            value = kwargs.get("phase", value)

        if action == "get_phase":
            action = "read"
            key = "phase"

        if action == "set_status":
            content = kwargs.get("status", value)
            if not content:
                return Response(message="ERROR: 'status' content required for action=set_status", break_loop=False)
            db_set_status(pid, str(content))
            return Response(message=f"Updated status for project '{name}'.", break_loop=False)

        if action == "get_status":
            content = db_get_status(pid)
            return Response(message=content or f"No status set for project '{name}'.", break_loop=False)

        if action == "list_keys":
            keys = list_kv_keys(pid)
            return Response(
                message=f"Keys for project '{name}': {', '.join(keys) if keys else '(none)'}",
                break_loop=False,
            )

        if action == "read":
            if not key:
                # Alle Keys als Dict zurückgeben
                keys = list_kv_keys(pid)
                data = {k: get_kv(pid, k) for k in keys}
                return Response(
                    message=json.dumps(data, indent=2, ensure_ascii=False, default=str),
                    break_loop=False,
                )
            v = get_kv(pid, key, default=None)
            if v is None:
                return Response(
                    message=f"Key '{key}' not set for project '{name}'.",
                    break_loop=False,
                )
            return Response(
                message=json.dumps(v, indent=2, ensure_ascii=False, default=str),
                break_loop=False,
            )

        if action == "update":
            if not key:
                return Response(
                    message="ERROR: 'key' required for action=update",
                    break_loop=False,
                )
            # value kann dict (direkt) oder str (JSON-encoded) sein
            if isinstance(value, str):
                try:
                    parsed = json.loads(value) if value.strip() else None
                except json.JSONDecodeError:
                    # Nicht-JSON-String → als reiner String speichern
                    parsed = value
            else:
                parsed = value
            set_kv(pid, key, parsed)
            return Response(
                message=f"Updated key '{key}' for project '{name}'.",
                break_loop=False,
            )

        if action == "delete":
            if not key:
                return Response(
                    message="ERROR: 'key' required for action=delete",
                    break_loop=False,
                )
            ok = delete_kv(pid, key)
            return Response(
                message=(
                    f"Deleted key '{key}' for project '{name}'." if ok
                    else f"Key '{key}' did not exist for project '{name}'."
                ),
                break_loop=False,
            )

        return Response(
            message=f"Unknown action {action!r}. Supported: read, update, delete, list_keys, set_phase, get_phase, set_status, get_status",
            break_loop=False,
        )