import type { CollectionConfig } from "payload";

export const Papers: CollectionConfig = {
  slug: "papers",
  labels: {
    singular: "Diplomarbeit",
    plural: "Diplomarbeiten",
  },
  access: {
    create: ({ req: { user } }) => Boolean(user?.type === "admin"),
    delete: ({ req: { user } }) => Boolean(user?.type === "admin"),
    read: () => true,
    update: async ({ req: { user, payload }, id }) => {
      if (!user || !id) return false; // Explicitly handle missing ID

      if (user?.type === "admin") return true;


      const paper = await payload.findByID({
        collection: "papers",
        id,
        depth: 1,
      });

      if (!paper) return false;
      if(paper.published) return false;

      return paper.authors.some((author: any) => author.name === user.name);
    },
  },
  admin: {
    useAsTitle: "title",
  },
  fields: [
    {
      name: "published",
      type: "checkbox",
      defaultValue: false,
      label: "Veröffentlicht (Auf der Website sichtbar)",
      access: {
        update: ({ req: { user } }) => Boolean(user?.type === "admin"),
      }
    },
    {
      name: "title",
      type: "text",
      unique: true,
    },
    {
      name: "department",
      type: "select",
      options: [
        { label: "WI", value: "WI" },
        { label: "CI", value: "CI" },
        { label: "MD", value: "MD" },
      ],
    },
    {
      name: "year",
      type: "text",
    },
    {
      name: "issue",
      label: "Problemstellung",
      type: "textarea",
    },
    {
      name: "goal",
      label: "Zielsetzung",
      type: "textarea",
    },
    {
      name: "result",
      label: "Ergebnis",
      type: "textarea",
    },
    {
      name: "technologies",
      type: "array",
      fields: [
        {
          name: "technology",
          type: "relationship",
          relationTo: "technologies",
          required: true,
        },
        {
          name: "description",
          type: "text",
          admin: {
            placeholder: "... wurde für das Frontend verwendet",
          },
        },
      ],
    },
    {
      name: "prototype",
      type: "group",
      fields: [
        {
          name: "image",
          type: "upload",
          relationTo: "media",
        },
        {
          name: "description",
          type: "text",
        },
      ],
    },
    {
      name: "mentor",
      type: "text",
      label: "Betreuer",
    },
    {
      name: "authors",
      type: "array",
      label: "Projektmitglieder",
      fields: [
        {
          name: "image",
          type: "upload",
          relationTo: "media",
        },
        {
          name: "name",
          type: "text",
          required: true,
        },
        {
          name: "position",
          type: "select",
          required: true,
          options: [
            {
              label: "Projektleiter (PL)",
              value: "leader",
            },
            {
              label: "Projektmitarbeiter (PM)",
              value: "member",
            },
          ],
        },
        {
          name: "description",
          type: "text",
        },
      ],
      validate: (authors) => {
        // @ts-ignore
        const leaders = authors.filter(
          (author) => author.position === "leader",
        );
        if (leaders.length > 1) {
          return "Only one author can be the project leader.";
        }
        return true;
      },
    },
  ],
};