"""N8N workflow schema types and validation."""
from __future__ import annotations

from typing import Any, Dict, List, Literal, Optional, Union


class N8NPosition:
    """Canvas position [x, y]."""

    @staticmethod
    def validate(value: Any) -> bool:
        return (
            isinstance(value, list) and
            len(value) == 2 and
            all(isinstance(v, (int, float)) for v in value)
        )


class N8NConnectionTarget:
    """Connection target specification."""

    @staticmethod
    def validate(value: Any) -> bool:
        if not isinstance(value, dict):
            return False
        return (
            "node" in value and isinstance(value["node"], str) and
            "type" in value and isinstance(value["type"], str) and
            "index" in value and isinstance(value["index"], int) and value["index"] >= 0
        )


class N8NNode:
    """N8N workflow node specification."""

    @staticmethod
    def validate(value: Any) -> bool:
        if not isinstance(value, dict):
            return False
        required = ["id", "name", "type", "typeVersion", "position"]
        if not all(key in value for key in required):
            return False
        if not isinstance(value["id"], str) or not value["id"]:
            return False
        if not isinstance(value["name"], str) or not value["name"]:
            return False
        if not isinstance(value["type"], str) or not value["type"]:
            return False
        if not isinstance(value["typeVersion"], (int, float)) or value["typeVersion"] < 1:
            return False
        if not N8NPosition.validate(value["position"]):
            return False
        return True


class N8NTrigger:
    """N8N workflow trigger specification."""

    VALID_KINDS = ["webhook", "schedule", "queue", "email", "poll", "manual", "other"]

    @staticmethod
    def validate(value: Any) -> bool:
        if not isinstance(value, dict):
            return False
        required = ["nodeId", "kind"]
        if not all(key in value for key in required):
            return False
        if not isinstance(value["nodeId"], str) or not value["nodeId"]:
            return False
        if not isinstance(value["kind"], str) or value["kind"] not in N8NTrigger.VALID_KINDS:
            return False
        if "enabled" in value and not isinstance(value["enabled"], bool):
            return False
        if "meta" in value and not isinstance(value["meta"], dict):
            return False
        return True


class N8NWorkflow:
    """N8N workflow specification."""

    @staticmethod
    def validate(value: Any) -> bool:
        if not isinstance(value, dict):
            return False
        required = ["name", "nodes", "connections"]
        if not all(key in value for key in required):
            return False
        if not isinstance(value["name"], str) or not value["name"]:
            return False
        if not isinstance(value["nodes"], list) or len(value["nodes"]) < 1:
            return False
        if not isinstance(value["connections"], dict):
            return False
        if not all(N8NNode.validate(node) for node in value["nodes"]):
            return False
        # Validate triggers array if present
        if "triggers" in value:
            if not isinstance(value["triggers"], list):
                return False
            if not all(N8NTrigger.validate(trigger) for trigger in value["triggers"]):
                return False
        return True