import { memo, useEffect } from 'react';
import { useUpdateNodeInternals } from '@xyflow/react';
import NodeShell from '../components/NodeShell.jsx';
import { useWorkflow } from '../context/WorkflowContext.jsx';
import { createBrowserId } from '../lib/ids.js';
import { getNodeAccent } from '../lib/nodeRegistry.js';

function ScriptFlowNode({ id, data, selected, type }) {
  const { getNodeHandles, replaceNodeData, removeHandleConnections } = useWorkflow();
  const updateNodeInternals = useUpdateNodeInternals();
  const handles = getNodeHandles(type, data);
  const runtime = data.runtime || {};

  useEffect(() => {
    updateNodeInternals(id);
  }, [id, data.entries.length, data.hasScriptOutput, updateNodeInternals]);

  const addEntry = (kind) => {
    replaceNodeData(id, (current) => ({
      ...current,
      entries: [...current.entries, { id: createBrowserId(`${kind}-slot`), kind }],
    }));
  };

  const removeEntry = (entryId) => {
    removeHandleConnections(id, entryId, 'target');
    replaceNodeData(id, (current) => ({
      ...current,
      entries: current.entries.filter((entry) => entry.id !== entryId),
    }));
  };

  const toggleOutput = () => {
    if (data.hasScriptOutput) {
      removeHandleConnections(id, 'script-text', 'source');
    }

    replaceNodeData(id, (current) => ({
      ...current,
      hasScriptOutput: !current.hasScriptOutput,
    }));
  };

  return (
    <NodeShell
      nodeId={id}
      title={data.title}
      accent={getNodeAccent(type)}
      selected={selected}
      status={runtime.status}
      inputs={handles.inputs}
      outputs={handles.outputs}
      className="node-shell--script"
      bodyClassName="node-shell__body--script"
      renderInputAddon={(input, index) =>
        index === 0 ? null : (
          <button type="button" className="nodrag node-shell__port-remove" onClick={() => removeEntry(input.id)}>
            x
          </button>
        )
      }
      footer={
        <div className="script-node__footer-buttons">
          <button
            type="button"
            className="nodrag node-button node-button--ghost"
            onClick={() => addEntry('user')}
            disabled={data.hasScriptOutput}
          >
            + User
          </button>
          <button
            type="button"
            className="nodrag node-button node-button--ghost"
            onClick={() => addEntry('character')}
            disabled={data.hasScriptOutput}
          >
            + Character
          </button>
          <button
            type="button"
            className={`nodrag node-button ${data.hasScriptOutput ? 'is-active' : ''}`}
            onClick={toggleOutput}
          >
            Output
          </button>
        </div>
      }
    >
      <div className="script-node__spacer" />
      {runtime.error ? <div className="node-error">{runtime.error}</div> : null}
    </NodeShell>
  );
}

export default memo(ScriptFlowNode);