// src/components/wizard/ReviewStep.tsx
// Step 3 component — live preview + security gate + all download/copy actions.
// Covers CONF-02, CONF-03, DOWN-01–DOWN-06, SECU-01, SECU-02.
import { useMemo, useState } from 'react';
import { useWizard } from '../../store/context';
import { MD3_BTN_FILLED, MD3_BTN_OUTLINED } from '../../styles/md3-buttons';
import {
  buildRcloneConf,
  buildIntuneInstall,
  buildIntuneDetection,
  buildRmmScript,
} from '../../generators/index';
import { OutputBlock } from './OutputBlock';
import { downloadZip } from '../../utils/downloadZip';

const PLACEHOLDER = '# Fill in the wizard steps to generate your rclone.conf';

export function ReviewStep() {
  const { state, dispatch } = useWizard();
  const [acknowledged, setAcknowledged] = useState(false);

  // CONF-02: live preview — updates on every state change
  const rcloneConf = useMemo(() => {
    try {
      return buildRcloneConf(state);
    } catch {
      return PLACEHOLDER;
    }
  }, [state]);

  const intuneInstall = useMemo(() => {
    try {
      return buildIntuneInstall(state);
    } catch {
      return '';
    }
  }, [state]);

  const intuneDetection = useMemo(() => {
    try {
      return buildIntuneDetection(state);
    } catch {
      return '';
    }
  }, [state]);

  const rmmScript = useMemo(() => {
    try {
      return buildRmmScript(state);
    } catch {
      return '';
    }
  }, [state]);

  const showIntune = state.deployment.scriptTargets.includes('intune');
  const showRmm = state.deployment.scriptTargets.includes('rmm');

  // DOWN-05: ZIP bundle — filtered by scriptTargets (TECH-01)
  async function handleDownloadZip() {
    const files: { name: string; content: string }[] = [
      { name: 'rclone.conf', content: rcloneConf },
    ];
    if (showIntune) {
      files.push({ name: 'intune-install.ps1', content: intuneInstall });
      files.push({ name: 'intune-detection.ps1', content: intuneDetection });
    }
    if (showRmm) {
      files.push({ name: 'rmm-script.ps1', content: rmmScript });
    }
    await downloadZip(files, 'rclone-deployment.zip');
  }

  return (
    <div>
      <h2 className="text-2xl font-bold text-on-surface mb-2">Step 4: Review &amp; Download</h2>
      <p className="text-sm text-on-surface-variant mt-1 mb-4">
        Review your generated files and download them. Acknowledge the security notice before
        copying or downloading credentials.
      </p>

      {/* SECU-02: client-side only notice */}
      <p className="text-sm text-success bg-success/10 rounded p-3 mb-6">
        No data is sent to any server. All file generation happens in your browser.
      </p>

      {/* SECU-01: security acknowledgement gate */}
      <div className="bg-warning/10 border border-warning rounded p-4 mb-6">
        <p className="text-sm text-warning font-medium mb-2">
          Security warning: generated files contain credentials in plain text.
        </p>
        <label className="flex items-center gap-2 text-sm text-warning cursor-pointer">
          <input
            type="checkbox"
            checked={acknowledged}
            onChange={(e) => setAcknowledged(e.target.checked)}
          />
          I understand that the generated files contain credentials in plain text.
        </label>
      </div>

      {/* Output blocks — DOWN-01 through DOWN-04, CONF-03, DOWN-06 */}
      <OutputBlock
        label="rclone.conf"
        content={rcloneConf}
        filename="rclone.conf"
        disabled={!acknowledged}
      />
      {showIntune && (
        <OutputBlock
          label="Intune Install Script"
          content={intuneInstall}
          filename="intune-install.ps1"
          disabled={!acknowledged}
        />
      )}
      {showIntune && (
        <OutputBlock
          label="Intune Detection Script"
          content={intuneDetection}
          filename="intune-detection.ps1"
          disabled={!acknowledged}
        />
      )}
      {showRmm && (
        <OutputBlock
          label="RMM Script"
          content={rmmScript}
          filename="rmm-script.ps1"
          disabled={!acknowledged}
        />
      )}

      {/* TECH-02: Back button — dispatches SET_STEP(2) */}
      <div className="flex flex-col sm:flex-row gap-3 mt-6">
        <button
          type="button"
          onClick={() => dispatch({ type: 'SET_STEP', payload: 2 })}
          className={`${MD3_BTN_OUTLINED} w-full sm:w-auto`}
        >
          Back
        </button>
      </div>

      {/* DOWN-05: ZIP bundle */}
      <button
        type="button"
        disabled={!acknowledged}
        onClick={handleDownloadZip}
        className={`w-full mt-4 ${MD3_BTN_FILLED}`}
      >
        Download All (ZIP)
      </button>
    </div>
  );
}

export default ReviewStep;