"""Tool: create/read/update/validate project manifests (DB-backed, replaces .a0/manifests/*.json)."""
from __future__ import annotations

import json
import os
from typing import Any, Dict

from helpers.tool import Tool, Response
from usr.plugins.a0_software_orchestrator.helpers.db_state_store import get_project_id, get_kv, set_kv, list_kv_keys
from usr.plugins.a0_software_orchestrator.helpers.manifest_schema import PROJECT_MANIFEST_SCHEMA, DEPLOYMENT_MANIFEST_SCHEMA
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 _schema_for(manifest_type: str) -> Dict[str, Any]:
    if manifest_type == "project":
        return PROJECT_MANIFEST_SCHEMA
    if manifest_type == "deployment":
        return DEPLOYMENT_MANIFEST_SCHEMA
    return {}


def _validate(data: Dict[str, Any], schema: Dict[str, Any]) -> list[str]:
    """Lightweight required-keys validator (subset of JSON-Schema)."""
    errors = []
    if not isinstance(data, dict):
        return [f"manifest must be a JSON object, got {type(data).__name__}"]
    required = schema.get("required", [])
    for key in required:
        if key not in data:
            errors.append(f"missing required field: {key!r}")
    return errors


class RepoManifest(Tool):
    """Create, read, update, list or validate project/deployment/quality manifests.

    Args (kwargs):
        project_name (str): Projektname (bevorzugt).
        project_root (str): Legacy – wird zu basename() aufgelöst.
        manifest_type (str): "project" (default), "deployment", "quality".
        action (str): "create" (default), "read", "update", "list", "validate".
        data (str|dict): JSON-string oder dict (für create/update).
    """

    async def execute(
        self,
        project_name: str = "",
        project_root: str = "",
        manifest_type: str = "project",
        action: str = "create",
        data: 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)
        key = f"manifest_{manifest_type}"
        schema = _schema_for(manifest_type)

        if action == "list":
            keys = [k for k in list_kv_keys(pid) if k.startswith("manifest_")]
            if not keys:
                return Response(
                    message=f"No manifests for project {name!r}.",
                    break_loop=False,
                )
            return Response(
                message=f"Manifests for {name!r}: {', '.join(keys)}",
                break_loop=False,
            )

        if action == "read":
            manifest = get_kv(pid, key, default=None)
            if manifest is None:
                return Response(
                    message=f"No {manifest_type!r} manifest for project {name!r}.",
                    break_loop=False,
                )
            return Response(
                message=json.dumps(manifest, indent=2, ensure_ascii=False),
                break_loop=False,
            )

        if action in ("create", "update"):
            # Parse data
            if not data:
                return Response(
                    message="ERROR: 'data' required for create/update (JSON string or dict)",
                    break_loop=False,
                )
            if isinstance(data, str):
                try:
                    parsed = json.loads(data)
                except json.JSONDecodeError as e:
                    return Response(
                        message=f"ERROR: 'data' is not valid JSON: {e}",
                        break_loop=False,
                    )
            else:
                parsed = data

            # Validate against schema (if known)
            if schema:
                errors = _validate(parsed, schema)
                if errors:
                    return Response(
                        message=f"ERROR: manifest validation failed: {errors}",
                        break_loop=False,
                    )

            set_kv(pid, key, parsed)
            return Response(
                message=f"{manifest_type!r} manifest saved for project {name!r} (key={key!r}).",
                break_loop=False,
            )

        if action == "validate":
            manifest = get_kv(pid, key, default=None)
            if manifest is None:
                return Response(
                    message=f"No {manifest_type!r} manifest to validate for project {name!r}.",
                    break_loop=False,
                )
            if not schema:
                return Response(
                    message=f"No schema defined for {manifest_type!r}; cannot validate.",
                    break_loop=False,
                )
            errors = _validate(manifest, schema)
            if errors:
                return Response(
                    message=f"Validation FAILED: {errors}",
                    break_loop=False,
                )
            return Response(
                message=f"Validation PASSED for {manifest_type!r} manifest of project {name!r}.",
                break_loop=False,
            )

        return Response(
            message=f"Unknown action {action!r}. Supported: create, read, update, list, validate",
            break_loop=False,
        )