// ---------------------------------------------------------------------------
// Table
// ---------------------------------------------------------------------------

export function renderTable(el: HTMLElement, rows: Record<string, unknown>[], columns?: string[]): void {
  const table = el.createEl('table', { cls: 'logfire-table' });
  const allKeys = columns ?? Object.keys(rows[0]);

  const thead = table.createEl('thead');
  const headerRow = thead.createEl('tr');
  for (const key of allKeys) {
    headerRow.createEl('th', { text: key });
  }

  const tbody = table.createEl('tbody');
  for (const row of rows) {
    const tr = tbody.createEl('tr');
    for (const key of allKeys) {
      tr.createEl('td', { text: formatValue(row[key]) });
    }
  }
}

// ---------------------------------------------------------------------------
// Timeline
// ---------------------------------------------------------------------------

export function renderTimeline(el: HTMLElement, rows: Record<string, unknown>[]): void {
  const list = el.createEl('ul', { cls: 'logfire-timeline' });
  for (const row of rows) {
    const ts = typeof row.timestamp === 'number'
      ? new Date(row.timestamp).toLocaleTimeString()
      : '';
    const type = String(row.type ?? '');
    const source = String(row.source ?? '');
    list.createEl('li', { text: `${ts} ${type} ${source}` });
  }
}

// ---------------------------------------------------------------------------
// Summary
// ---------------------------------------------------------------------------

export function renderSummary(el: HTMLElement, rows: Record<string, unknown>[]): void {
  const container = el.createDiv({ cls: 'logfire-summary' });
  for (const row of rows) {
    for (const [key, value] of Object.entries(row)) {
      const line = container.createDiv();
      line.createEl('strong', { text: `${key}: ` });
      line.appendText(formatValue(value));
    }
  }
}

// ---------------------------------------------------------------------------
// Metric (single big number)
// ---------------------------------------------------------------------------

export function renderMetric(el: HTMLElement, rows: Record<string, unknown>[]): void {
  const record = rows[0];
  const values = Object.values(record);
  const value = values.length > 0 ? values[values.length - 1] : 0;
  const div = el.createEl('div', {
    text: formatValue(value),
    cls: 'logfire-metric',
  });
  div.style.fontSize = '2em';
}

// ---------------------------------------------------------------------------
// List
// ---------------------------------------------------------------------------

export function renderList(el: HTMLElement, rows: Record<string, unknown>[]): void {
  const list = el.createEl('ul', { cls: 'logfire-list' });
  for (const row of rows) {
    const text = Object.values(row).map(formatValue).join(' | ');
    list.createEl('li', { text });
  }
}

// ---------------------------------------------------------------------------
// Heatmap (text-based bar chart)
// ---------------------------------------------------------------------------

export function renderHeatmap(el: HTMLElement, rows: Record<string, unknown>[]): void {
  const container = el.createDiv({ cls: 'logfire-heatmap' });

  for (const row of rows) {
    const group = String(row.group ?? '');
    const count = Number(row.count ?? 0);
    const bar = '\u2588'.repeat(Math.min(count, 50));
    container.createDiv({ text: `${group} ${bar} ${count}` });
  }
}

// ---------------------------------------------------------------------------
// Markdown table generation (for copy/export)
// ---------------------------------------------------------------------------

export function toMarkdownTable(keys: string[], rows: Record<string, unknown>[]): string {
  const header = `| ${keys.join(' | ')} |`;
  const separator = `| ${keys.map(() => '---').join(' | ')} |`;
  const body = rows.map(row =>
    `| ${keys.map(k => {
      const v = row[k];
      return v === null || v === undefined ? '' : String(v);
    }).join(' | ')} |`
  ).join('\n');

  return `${header}\n${separator}\n${body}`;
}

// ---------------------------------------------------------------------------
// Value formatting
// ---------------------------------------------------------------------------

export function formatValue(value: unknown): string {
  if (value === null || value === undefined) return '';
  if (typeof value === 'number') {
    if (value > 1e12) return new Date(value).toLocaleString();
    return value.toLocaleString();
  }
  return String(value);
}