import {
  Release,
  IssueLinkType,
  IssuePriority,
  ProjectRole,
  ReleaseStatus,
  SettingColor,
  StatusCategory,
  Workflow,
} from '@task-stream/web/tracker/domain';

type ChipColor =
  | 'accent'
  | 'grey'
  | 'highlighted'
  | 'primary'
  | 'success'
  | 'warn';

/* UI copy (es) and the visual language of the tracker. */

/** CSS colour of a settings colour token (`--ts-c-*` in styles.scss). */
export const tone = (color: string) => `var(--ts-c-${color}, var(--ts-muted))`;

/** A status as the UI shows it: the project's name and colour. */
export function statusLook(workflow: Workflow, id: string) {
  const status = workflow.status(id);
  return {
    label: status.name,
    tone: tone(status.color),
    category: status.category,
  };
}

/** A ticket type as the UI shows it: name, icon and colour. */
export function typeLook(workflow: Workflow, id: string) {
  const type = workflow.type(id);
  return { label: type.name, icon: type.icon, tone: tone(type.color) };
}

/** What each category means, whatever the project calls its statuses. */
export const CATEGORY: Record<
  StatusCategory,
  { label: string; hint: string; tone: string }
> = {
  [StatusCategory.TODO]: {
    label: 'Pendiente',
    hint: 'Aún no empezado. Los tickets nuevos entran en el primero.',
    tone: tone('slate'),
  },
  [StatusCategory.IN_PROGRESS]: {
    label: 'En curso',
    hint: 'Alguien trabaja en él (mide el tiempo de ciclo).',
    tone: tone('violet'),
  },
  [StatusCategory.QA]: {
    label: 'QA',
    hint: 'Esperando o en pruebas. Salir a «hecho» cuenta como QA superado.',
    tone: tone('amber'),
  },
  [StatusCategory.DONE]: {
    label: 'Hecho',
    hint: 'Terminado: cuenta como resuelto en releases y estadísticas.',
    tone: tone('green'),
  },
  [StatusCategory.CANCELLED]: {
    label: 'Cancelado',
    hint: 'Descartado: no ocupa columna ni cuenta en el alcance.',
    tone: tone('stone'),
  },
};

/** Names of the icons a ticket type can pick (TYPE_ICONS). */
export const ICON_LABEL: Record<string, string> = {
  bug: 'Bicho',
  feature: 'Estrella',
  palette: 'Paleta',
  task: 'Casilla',
  qa: 'Lupa',
  flag: 'Bandera',
  'star-fill': 'Estrella rellena',
  rocket: 'Cohete',
  document: 'Documento',
  'light-bulb': 'Bombilla',
  key: 'Llave',
  support: 'Soporte',
};

export const COLOR_LABEL: Record<SettingColor, string> = {
  slate: 'Pizarra',
  stone: 'Piedra',
  violet: 'Violeta',
  blue: 'Azul',
  sky: 'Cielo',
  teal: 'Verde azulado',
  green: 'Verde',
  amber: 'Ámbar',
  orange: 'Naranja',
  red: 'Rojo',
  pink: 'Rosa',
};

/** Signal strength of a priority, drawn as bars (1–4) like a phone signal. */
export const PRIORITY_LEVEL: Record<IssuePriority, number> = {
  [IssuePriority.CRITICAL]: 4,
  [IssuePriority.HIGH]: 3,
  [IssuePriority.MEDIUM]: 2,
  [IssuePriority.LOW]: 1,
  [IssuePriority.LOWEST]: 0,
};

export const PRIORITY: Record<
  IssuePriority,
  { label: string; color: ChipColor }
> = {
  [IssuePriority.CRITICAL]: { label: 'Crítica', color: 'warn' },
  [IssuePriority.HIGH]: { label: 'Alta', color: 'accent' },
  [IssuePriority.MEDIUM]: { label: 'Media', color: 'primary' },
  [IssuePriority.LOW]: { label: 'Baja', color: 'grey' },
  [IssuePriority.LOWEST]: { label: 'Mínima', color: 'grey' },
};

export const LINK: Record<IssueLinkType, { outward: string; inward: string }> =
  {
    [IssueLinkType.BLOCKS]: {
      outward: 'bloquea a',
      inward: 'está bloqueado por',
    },
    [IssueLinkType.DEPENDS_ON]: {
      outward: 'depende de',
      inward: 'es dependencia de',
    },
    [IssueLinkType.TESTS]: { outward: 'prueba', inward: 'es probado por' },
    [IssueLinkType.DUPLICATES]: {
      outward: 'duplica a',
      inward: 'está duplicado por',
    },
    [IssueLinkType.RELATES_TO]: {
      outward: 'relacionado con',
      inward: 'relacionado con',
    },
  };

/** Colour of each project role (pills in members and tracking). */
export const ROLE_TONE: Record<ProjectRole, string> = {
  [ProjectRole.OWNER]: 'var(--ts-brand)',
  [ProjectRole.ADMIN]: 'var(--ts-s-review)',
  [ProjectRole.MEMBER]: 'var(--ts-s-todo)',
  [ProjectRole.VIEWER]: 'var(--ts-s-cancelled)',
};

export const ROLE: Record<ProjectRole, string> = {
  [ProjectRole.OWNER]: 'Propietario',
  [ProjectRole.ADMIN]: 'Admin',
  [ProjectRole.MEMBER]: 'Miembro',
  [ProjectRole.VIEWER]: 'Lector',
};

export const RELEASE_STATUS: Record<
  ReleaseStatus,
  { label: string; color: ChipColor }
> = {
  [ReleaseStatus.PLANNED]: { label: 'Planificada', color: 'primary' },
  [ReleaseStatus.RELEASED]: { label: 'Publicada', color: 'success' },
  [ReleaseStatus.ARCHIVED]: { label: 'Archivada', color: 'grey' },
};

export const options = <T extends string>(
  record: Record<T, string | { label: string }>,
) =>
  (Object.keys(record) as T[]).map((value) => {
    const entry = record[value];
    return { value, label: typeof entry === 'string' ? entry : entry.label };
  });

/** "hace 5 min", "ayer"… */
export function timeAgo(iso: string, now = Date.now()): string {
  const seconds = Math.max(0, Math.round((now - Date.parse(iso)) / 1000));
  const rtf = new Intl.RelativeTimeFormat('es', { numeric: 'auto' });
  if (seconds < 60) return rtf.format(-seconds, 'second');
  if (seconds < 3600) return rtf.format(-Math.round(seconds / 60), 'minute');
  if (seconds < 86400) return rtf.format(-Math.round(seconds / 3600), 'hour');
  return rtf.format(-Math.round(seconds / 86400), 'day');
}

const PROJECT_TONES = [
  'var(--ts-t-feature)',
  'var(--ts-s-review)',
  'var(--ts-t-ui)',
  'var(--ts-t-qa)',
  'var(--ts-s-done)',
  'var(--ts-s-qa)',
];

/** A stable colour per project (from its key), so it is recognisable everywhere. */
export function projectTone(key: string): string {
  let hash = 0;
  for (const char of key) hash = (hash * 31 + char.charCodeAt(0)) >>> 0;
  return PROJECT_TONES[hash % PROJECT_TONES.length];
}

/** "Ana García" → "AG". */
export function initials(name: string): string {
  return name
    .split(/\s+/)
    .filter(Boolean)
    .map((part) => part[0])
    .join('')
    .slice(0, 2)
    .toUpperCase();
}

/** "14:05" today, "3 oct" otherwise (logs and histories). */
export function clock(iso: string, now = new Date()): string {
  const date = new Date(iso);
  return date.toDateString() === now.toDateString()
    ? date.toLocaleTimeString('es', { hour: '2-digit', minute: '2-digit' })
    : date.toLocaleDateString('es', { day: 'numeric', month: 'short' });
}

/** "publicada hace 2 días", "objetivo 17 oct · en 14 d", "objetivo 3 oct · retrasada 2 d". */
export function releaseWhen(release: Release, now = Date.now()): string {
  if (release.releasedAt)
    return `publicada ${timeAgo(release.releasedAt, now)}`;
  if (!release.targetDate) return 'sin fecha';
  const target = new Date(release.targetDate);
  const days = Math.ceil((target.getTime() - now) / 86_400_000);
  const date = target.toLocaleDateString('es', {
    day: 'numeric',
    month: 'short',
  });
  if (days < 0) return `objetivo ${date} · retrasada ${-days} d`;
  return days === 0 ? 'objetivo hoy' : `objetivo ${date} · en ${days} d`;
}

/** WEB-12 → WEB (the project key prefix of a ticket key). */
export function projectKeyOf(issueKey: string): string {
  return issueKey.slice(0, issueKey.lastIndexOf('-'));
}