import type { UniqueID } from "@repo/rdx-ddd";
import { AggregateRoot } from "@repo/rdx-ddd";
import { Result } from "@repo/rdx-utils";
import { z } from "zod/v4";

import { FolderMappingRevision } from "./folder-mapping-revision.entity";
import { FOLDER_STATE_TRANSITIONS, FolderMappingError } from "./folder-mapping-values";
import type { FolderMappingValues } from "./value-objects/folder-mapping-values.vo";

type Props = Readonly<{
  companyId: UniqueID;
  values: FolderMappingValues;
  history: readonly FolderMappingRevision[];
}>;
export class FolderMapping extends AggregateRoot<Props> {
  private constructor(props: Props, id?: UniqueID) {
    super(Object.freeze({ ...props, history: Object.freeze([...props.history]) }), id);
  }
  static create(
    companyId: UniqueID,
    values: FolderMappingValues,
    actorId: UniqueID,
    recordedAt: string
  ): Result<FolderMapping, FolderMappingError> {
    if (
      !(
        z.iso.datetime().safeParse(recordedAt).success &&
        ["pending", "configured"].includes(values.state)
      )
    ) {
      return Result.fail(new FolderMappingError("INVALID_FOLDER_TRANSITION"));
    }
    return Result.ok(
      new FolderMapping({
        companyId,
        values,
        history: [FolderMappingRevision.create({ values, actorId, recordedAt })],
      })
    );
  }
  static rehydrate(props: Props, id: UniqueID) {
    return new FolderMapping(props, id);
  }
  get companyId() {
    return this.props.companyId;
  }
  get values() {
    return this.props.values;
  }
  get history() {
    return this.props.history;
  }
  update(
    values: FolderMappingValues,
    actorId: UniqueID,
    recordedAt: string
  ): Result<FolderMapping, FolderMappingError> {
    if (this.values.equals(values)) {
      return Result.ok(this);
    }
    if (!this.values.sameTarget(values)) {
      return Result.fail(new FolderMappingError("FOLDER_TARGET_IMMUTABLE"));
    }
    if (
      !FOLDER_STATE_TRANSITIONS[this.values.state].some((state) => state === values.state) ||
      (this.values.closed && !this.values.equals(values))
    ) {
      return Result.fail(new FolderMappingError("INVALID_FOLDER_TRANSITION"));
    }
    if (
      !z.iso.datetime().safeParse(recordedAt).success ||
      recordedAt < (this.history.at(-1)?.recordedAt ?? "")
    ) {
      return Result.fail(new FolderMappingError("INVALID_REQUEST"));
    }
    return Result.ok(
      new FolderMapping(
        {
          ...this.props,
          values,
          history: [...this.history, FolderMappingRevision.create({ values, actorId, recordedAt })],
        },
        this.id
      )
    );
  }
}