import type {
  AutomationScheduleDto,
  MetadataProviderId,
  MetadataSourceConfigDto,
  MetadataSourcesConfigDto,
  UpdateMetadataSourcesConfigDto
} from "@readabook/shared";

export const providerLabels: Record<MetadataProviderId, string> = {
  local: "Fichier local",
  openlibrary: "OpenLibrary",
  googlebooks: "Google Books",
  bnf: "BnF"
};

const weekdays = ["dimanche", "lundi", "mardi", "mercredi", "jeudi", "vendredi", "samedi"];

export function normalizeMetadataSources(config: MetadataSourcesConfigDto): MetadataSourcesConfigDto {
  const sorted = [...config.sources].sort((left, right) => left.priority - right.priority);
  const local = sorted.find((source) => source.provider === "local") ?? { provider: "local", enabled: true, priority: 0, hasApiKey: false };
  const external = sorted.filter((source) => source.provider !== "local");
  return {
    isbnPriorityEnabled: config.isbnPriorityEnabled,
    sources: [
      { ...local, enabled: true, priority: 0 },
      ...external.map((source, index) => ({ ...source, priority: index + 1 }))
    ]
  };
}

export function metadataSourcesPayload(config: MetadataSourcesConfigDto): UpdateMetadataSourcesConfigDto {
  const sources: NonNullable<UpdateMetadataSourcesConfigDto["sources"]> = [];
  config.sources.forEach((source) => {
    if (source.provider === "local") return;
    sources.push({
      provider: source.provider,
      enabled: source.enabled,
      priority: sources.length + 1
    });
  });
  return {
    isbnPriorityEnabled: config.isbnPriorityEnabled,
    sources
  };
}

export function moveSource(sources: MetadataSourceConfigDto[], provider: MetadataProviderId, direction: -1 | 1): MetadataSourceConfigDto[] {
  const external = sources.filter((source) => source.provider !== "local");
  const index = external.findIndex((source) => source.provider === provider);
  const nextIndex = index + direction;
  if (index < 0 || nextIndex < 0 || nextIndex >= external.length) return sources;

  const nextExternal = [...external];
  [nextExternal[index], nextExternal[nextIndex]] = [nextExternal[nextIndex], nextExternal[index]];
  const local = sources.find((source) => source.provider === "local") ?? { provider: "local", enabled: true, priority: 0, hasApiKey: false };
  return [local, ...nextExternal].map((source, priority) => ({ ...source, priority: source.provider === "local" ? 0 : priority }));
}

export function scheduleSummary(schedule: AutomationScheduleDto, subject: string): string {
  if (schedule.frequency === "disabled") return `${subject} desactive.`;
  if (schedule.frequency === "daily") return `${subject} tous les jours a ${schedule.time}.`;
  return `${subject} chaque ${weekdays[schedule.dayOfWeek]} a ${schedule.time}.`;
}

export const scheduleDays = weekdays.map((label, value) => ({ label, value }));