import type { CollectionConfig } from "payload";

/**
 * Derived-effect ledger for validated operation events.
 *
 * One row per (event, effect type) pair, keyed by `effectKey` =
 * `${eventId}:${effectType}` so an exact retry is a no-op. Effects are the
 * only place derived operation state may be recorded; they always carry
 * provenance back to both the operation event and the raw source event.
 *
 * Writes are internal only (create/update/delete denied; the bridge writes
 * via `overrideAccess`). Read is open to any logged-in user.
 */
export const OperationEffects: CollectionConfig = {
  slug: "operation-effects",
  admin: {
    group: "Operations",
    useAsTitle: "effectKey",
    defaultColumns: ["effectKey", "operationId", "effectType", "status", "appliedAt"],
  },
  access: {
    read: ({ req }) => !!req.user,
    create: () => false,
    update: () => false,
    delete: () => false,
  },
  fields: [
    {
      name: "operationEvent",
      type: "relationship",
      relationTo: "operation-events",
      required: true,
      index: true,
      admin: {
        description: "The validated operation event this effect derives from.",
      },
    },
    {
      name: "sourceEvent",
      type: "relationship",
      relationTo: "arma-sync-events",
      required: true,
      index: true,
      admin: {
        description: "The raw source event this effect derives from.",
      },
    },
    {
      name: "operationId",
      type: "text",
      required: true,
      index: true,
    },
    {
      name: "effectKey",
      type: "text",
      required: true,
      unique: true,
      index: true,
      admin: {
        description: "Idempotency key: `${eventId}:${effectType}`.",
      },
    },
    {
      name: "effectType",
      type: "select",
      required: true,
      options: [
        { label: "Operation Started", value: "operation.started" },
        { label: "Operation Ended", value: "operation.ended" },
        { label: "Objective Updated", value: "operation.objective-updated" },
        { label: "Extraction Recorded", value: "operation.extraction-recorded" },
        { label: "Inventory Recorded", value: "operation.inventory-recorded" },
      ],
    },
    {
      name: "status",
      type: "select",
      required: true,
      defaultValue: "applied",
      options: [
        { label: "Applied", value: "applied" },
        { label: "Pending", value: "pending" },
        { label: "Failed", value: "failed" },
        { label: "Reversed", value: "reversed" },
      ],
    },
    { name: "payload", type: "json" },
    {
      name: "reversalOf",
      type: "relationship",
      relationTo: "operation-effects",
      admin: {
        description: "Set when this effect reverses another effect.",
      },
    },
    {
      name: "reversedBy",
      type: "relationship",
      relationTo: "operation-effects",
      admin: {
        description: "Set when this effect has been reversed.",
      },
    },
    { name: "reconciliationNotes", type: "textarea" },
    { name: "appliedAt", type: "date" },
  ],
};