import { createContext, useCallback, useContext, useMemo, useState } from 'react';
import { Icon } from './icons';

const ConfirmContext = createContext(null);

export function ConfirmProvider({ children }) {
  const [dialog, setDialog] = useState(null);

  const confirm = useCallback((options) => {
    return new Promise((resolve) => {
      setDialog({
        title: options.title || '请确认操作',
        description: options.description || '',
        confirmText: options.confirmText || '确认',
        cancelText: options.cancelText || '取消',
        tone: options.tone || 'danger',
        resolve,
      });
    });
  }, []);

  const close = useCallback((result) => {
    setDialog((current) => {
      current?.resolve(result);
      return null;
    });
  }, []);

  const value = useMemo(() => ({ confirm }), [confirm]);

  return (
    <ConfirmContext.Provider value={value}>
      {children}
      {dialog ? (
        <div className="modal-overlay modal-overlay--center" onClick={() => close(false)}>
          <div className="confirm-card" onClick={(event) => event.stopPropagation()} role="dialog" aria-modal="true" aria-labelledby="confirm-title">
            <div className={`confirm-card__icon confirm-card__icon--${dialog.tone}`}>
              <Icon name={dialog.tone === 'danger' ? 'trash' : 'info'} size={18} />
            </div>
            <div className="confirm-card__body">
              <h2 id="confirm-title">{dialog.title}</h2>
              {dialog.description ? <p>{dialog.description}</p> : null}
            </div>
            <div className="confirm-card__actions">
              <button type="button" className="btn btn-secondary" onClick={() => close(false)}>{dialog.cancelText}</button>
              <button type="button" className={`btn ${dialog.tone === 'danger' ? 'btn-danger' : 'btn-primary'}`} onClick={() => close(true)}>{dialog.confirmText}</button>
            </div>
          </div>
        </div>
      ) : null}
    </ConfirmContext.Provider>
  );
}

export function useConfirm() {
  const context = useContext(ConfirmContext);
  if (!context) {
    throw new Error('useConfirm must be used within ConfirmProvider');
  }
  return context;
}