// Run history: runs grouped into days (local time), as shown in the dashboard's job detail and in reports.
import { parseDate } from './format.js';
import { STATUS, normalizeStatus } from './status.js';

// Colour of a day cell: the worst thing that happened that day
export const DAY_SEVERITY = ['failed', 'warning', 'unknown', 'running', 'success'];

const pad2 = (n) => String(n).padStart(2, '0');
export const localDayKey = (d) => `${d.getFullYear()}-${pad2(d.getMonth() + 1)}-${pad2(d.getDate())}`;
export const dayLabelFmt = new Intl.DateTimeFormat(undefined, { weekday: 'short', month: 'short', day: 'numeric' });
export const dayTickFmt = new Intl.DateTimeFormat(undefined, { month: 'short', day: 'numeric' });

export function normalizeRun(r) {
  return {
    id: String(r.id),
    status: normalizeStatus(r.status),
    startedAt: parseDate(r.started_at),
    finishedAt: parseDate(r.finished_at),
    duration: r.duration_seconds,
    size: r.size_bytes,
  };
}

export function buildDays(runs, count) {
  const today = new Date();
  today.setHours(0, 0, 0, 0);
  const days = [];
  for (let i = count - 1; i >= 0; i--) {
    const date = new Date(today);
    date.setDate(date.getDate() - i);
    days.push({ key: localDayKey(date), date, counts: {}, total: 0 });
  }
  const byKey = new Map(days.map((d) => [d.key, d]));
  for (const run of runs) {
    const day = byKey.get(localDayKey(run.startedAt));
    if (!day) continue;
    day.counts[run.status] = (day.counts[run.status] ?? 0) + 1;
    day.total++;
  }
  for (const day of days) day.status = day.total ? DAY_SEVERITY.find((s) => day.counts[s]) : 'none';
  return days;
}

export function describeCounts(counts) {
  return DAY_SEVERITY.filter((s) => counts[s])
    .map((s) => `${counts[s]} ${STATUS[s].label.toLowerCase()}`)
    .join(', ');
}