import chalk from 'chalk';
import Table from 'cli-table3';
import type { Feed } from '../db/schema';
import { MAX_TITLE_DISPLAY_LENGTH } from './constants';
import { formatRelativeTime } from './date';
import { sanitizeTerminalText } from './terminal';

/**
 * Render the Feed list as a CLI table.
 */
export function createFeedsTable(feeds: Feed[]): string {
  const table = new Table({
    head: [
      chalk.cyan('ID'),
      chalk.cyan('Title'),
      chalk.cyan('Category'),
      chalk.cyan('Last Fetched'),
      chalk.cyan('Status'),
      chalk.cyan('Articles'),
    ],
    colWidths: [6, 40, 15, 20, 12, 10],
    wordWrap: true,
  });

  for (const feed of feeds) {
    const status = feed.isActive
      ? feed.fetchError
        ? chalk.red('Error')
        : chalk.green('Active')
      : chalk.gray('Inactive');

    const lastFetched = feed.lastFetchedAt ? formatRelativeTime(feed.lastFetchedAt) : chalk.gray('Never');

    const articleCount = 'articleCount' in feed ? String((feed as Feed & { articleCount: number }).articleCount) : '-';

    table.push([
      feed.id.toString(),
      sanitizeTerminalText(feed.title).slice(0, MAX_TITLE_DISPLAY_LENGTH),
      feed.category ? sanitizeTerminalText(feed.category) : chalk.gray('-'),
      lastFetched,
      status,
      articleCount,
    ]);
  }

  return table.toString();
}

/**
 * Render the summary banner shown after `fetch all`.
 */
export function formatFetchSummary(
  results: Array<{
    feed: Feed;
    status: string;
    newArticles: number;
    error?: string;
    deactivated?: boolean;
  }>,
): string {
  const lines: string[] = [];

  const success = results.filter((r) => r.status === 'success');
  const notModified = results.filter((r) => r.status === 'not_modified');
  const errors = results.filter((r) => r.status === 'error');
  const deactivated = results.filter((r) => r.deactivated);
  const totalNew = results.reduce((sum, r) => sum + r.newArticles, 0);

  lines.push('');
  lines.push(chalk.bold('Fetch Summary:'));
  lines.push(chalk.green(`  ✓ Fetched: ${success.length}`));
  lines.push(chalk.blue(`  ○ Not modified: ${notModified.length}`));

  if (errors.length > 0) {
    lines.push(chalk.red(`  ✗ Errors: ${errors.length}`));
    for (const e of errors) {
      lines.push(
        chalk.red(`    - ${sanitizeTerminalText(e.feed.title)}: ${sanitizeTerminalText(e.error || 'Unknown error')}`),
      );
    }
  }

  if (deactivated.length > 0) {
    lines.push(chalk.yellow(`  ⊘ Deactivated: ${deactivated.length} (too many consecutive errors)`));
  }

  lines.push(chalk.cyan(`  Total new articles: ${totalNew}`));

  return lines.join('\n');
}