import { CollectionConfig } from "payload";
import { isDeveloper } from "@/utils/access-control/isRole";
import { emitGameEvent } from "@/utils/event-log/emit";

export const GameStructures: CollectionConfig = {
  slug: "game-structures",
  admin: {
    group: "Game",
    useAsTitle: "name",
  },
  access: {
    read: ({ req }) => !!req.user,
    create: isDeveloper,
    update: isDeveloper,
    delete: isDeveloper,
  },
  hooks: {
    afterChange: [
      async ({ doc, previousDoc, req }) => {
        const d = doc as any;
        const prev = previousDoc as any;
        if (!prev) return;
        if (!req.user) return;

        const oldStored = JSON.stringify(prev.storedResources ?? []);
        const newStored = JSON.stringify(d.storedResources ?? []);
        const oldVoid = JSON.stringify(prev.voidStorage ?? []);
        const newVoid = JSON.stringify(d.voidStorage ?? []);

        if (oldStored === newStored && oldVoid === newVoid) return;

        await emitGameEvent(req.payload, {
          type: "storage:withdraw",
          message: `Admin updated storage in "${d.name}"`,
          actor: req.user.id,
          structure: d.id,
          targetCollection: "game-structures",
          targetId: d.id,
          data: {
            previousStored: prev.storedResources,
            newStored: d.storedResources,
            previousVoid: prev.voidStorage,
            newVoid: d.voidStorage,
          },
        });
      },
    ],
  },
  fields: [
    {
      name: "name",
      type: "text",
      label: "Display Name",
      admin: {
        description: "The name of the structure as displayed in-game and on the frontend.",
      },
      required: true,
    },
    {
      name: "type",
      type: "relationship",
      relationTo: "structures",
      required: true,
      admin: {
        description: "The type of structure this is.",
      },
    },
    {
      name: "faction",
      type: "relationship",
      relationTo: "factions",
      admin: {
        description: "The faction that owns this structure.",
      },
    },
    {
      label: "Geolocation",
      type: "group",
      fields: [
        {
          name: "coordinates",
          type: "point",
        },
      ],
    },
    {
      name: "storedResources",
      type: "array",
      fields: [
        {
          name: "resource",
          type: "relationship",
          relationTo: "resources",
          required: true,
        },
        {
          name: "amount",
          type: "number",
          required: true,
          min: 1,
        },
        {
          name: "gridX",
          type: "number",
          required: true,
          min: 0,
          admin: {
            description: "Column position in the inventory grid (0-indexed).",
          },
        },
        {
          name: "gridY",
          type: "number",
          required: true,
          min: 0,
          admin: {
            description: "Row position in the inventory grid (0-indexed).",
          },
        },
        {
          name: "rotated",
          type: "checkbox",
          defaultValue: false,
          admin: {
            description: "Whether this item is rotated 90 degrees (swaps width and height).",
          },
        },
      ],
    },
    {
      name: "voidStorage",
      type: "array",
      admin: {
        description:
          "Items that no longer fit in the grid after a resize, stored here until retrieved.",
      },
      fields: [
        {
          name: "resource",
          type: "relationship",
          relationTo: "resources",
          required: true,
        },
        {
          name: "amount",
          type: "number",
          required: true,
          min: 1,
        },
        {
          name: "gridX",
          type: "number",
          required: true,
          min: 0,
        },
        {
          name: "gridY",
          type: "number",
          required: true,
          min: 0,
        },
        {
          name: "rotated",
          type: "checkbox",
          defaultValue: false,
        },
      ],
    },
  ],
};