import "reflect-metadata";
import { injectable } from "inversify";
import { getPayload } from "payload";
import type { SanitizedConfig } from "payload";

import type { IMediaRepository } from "../../application/repositories/media.repository.interface";
import type { Media } from "../../entities/models/media";

type PayloadMediaDoc = {
  id: string | number;
  alt?: string | null;
  url?: string | null;
  filename?: string | null;
  mimeType?: string | null;
  filesize?: number | null;
  width?: number | null;
  height?: number | null;
};

function mapDoc(doc: PayloadMediaDoc): Media {
  return {
    id: String(doc.id),
    alt: doc.alt ?? "",
    url: doc.url ?? "",
    filename: doc.filename ?? "",
    mimeType: doc.mimeType ?? "",
    filesize: doc.filesize ?? 0,
    ...(doc.width != null && { width: doc.width }),
    ...(doc.height != null && { height: doc.height }),
  };
}

@injectable()
export class MediaRepository implements IMediaRepository {
  private config: SanitizedConfig;

  constructor(config: SanitizedConfig) {
    this.config = config;
  }

  async getMedia(id: string): Promise<Media | undefined> {
    const payload = await getPayload({ config: this.config });
    try {
      const doc = await payload.findByID({
        collection: "media",
        id,
        overrideAccess: true,
      });
      return mapDoc(doc as PayloadMediaDoc);
    } catch {
      return undefined;
    }
  }

  async listMedia(opts?: { limit?: number; offset?: number }): Promise<Media[]> {
    const payload = await getPayload({ config: this.config });
    const result = await payload.find({
      collection: "media",
      limit: opts?.limit ?? 50,
      page: opts?.offset
        ? Math.floor(opts.offset / (opts.limit ?? 50)) + 1
        : 1,
      overrideAccess: true,
    });
    return result.docs.map((d) => mapDoc(d as PayloadMediaDoc));
  }

  async deleteMedia(id: string): Promise<void> {
    const payload = await getPayload({ config: this.config });
    await payload.delete({
      collection: "media",
      id,
      overrideAccess: true,
    });
  }
}