import type { UniqueID } from "@repo/rdx-ddd";
import { AggregateRoot } from "@repo/rdx-ddd";
import { Maybe, Result } from "@repo/rdx-utils";

import { ResourceCatalogError } from "./resource-definition";
import { CatalogAvailability, ResourceDefinition } from "./resource-definition.entity";
import type { ResourceDefinitionValues } from "./value-objects/resource-definition-values.vo";

type CatalogProps = {
  definitions: readonly ResourceDefinition[];
  availability: readonly CatalogAvailability[];
};
export class ResourceCatalog extends AggregateRoot<CatalogProps> {
  private constructor(props: CatalogProps, id?: UniqueID) {
    super(
      {
        definitions: Object.freeze([...props.definitions]),
        availability: Object.freeze([...props.availability]),
      },
      id
    );
  }
  static create() {
    return new ResourceCatalog({ definitions: [], availability: [] });
  }
  static rehydrate(props: CatalogProps, id: UniqueID) {
    return new ResourceCatalog(props, id);
  }
  get definitions() {
    return this.props.definitions;
  }
  get availability() {
    return this.props.availability;
  }
  visible(companyId: Maybe<UniqueID>) {
    return this.definitions.filter(
      (item) =>
        !item.companyId.getOrUndefined() ||
        item.companyId.getOrUndefined()?.equals(companyId.getOrUndefined())
    );
  }
  active(item: ResourceDefinition, companyId: Maybe<UniqueID>) {
    const override = this.availability.find(
      (entry) =>
        entry.companyId.equals(companyId.getOrUndefined()) && entry.definitionId.equals(item.id)
    );
    return override?.active.getOrUndefined() ?? item.active;
  }
  save(
    companyId: Maybe<UniqueID>,
    id: Maybe<UniqueID>,
    values: ResourceDefinitionValues
  ): Result<ResourceCatalog, ResourceCatalogError> {
    const previous = id.getOrUndefined()
      ? this.definitions.find((item) => item.id.equals(id.getOrUndefined()))
      : undefined;
    if (id.getOrUndefined() && !(previous && sameScope(previous.companyId, companyId))) {
      return Result.fail(new ResourceCatalogError("DEFINITION_NOT_FOUND"));
    }
    const candidate = previous
      ? previous.update(values)
      : Result.ok(ResourceDefinition.create(companyId, values, true));
    if (!candidate.isSuccess) {
      return candidate;
    }
    return this.replace(candidate.data, companyId, previous);
  }
  private replace(
    candidate: ResourceDefinition,
    scope: Maybe<UniqueID>,
    previous?: ResourceDefinition
  ): Result<ResourceCatalog, ResourceCatalogError> {
    const conflicts = scope.getOrUndefined() ? this.visible(scope) : this.definitions;
    if (
      conflicts.some(
        (item) =>
          !item.id.equals(candidate.id) &&
          item.values.data.kind === candidate.values.data.kind &&
          item.values.data.name.toLocaleLowerCase("es") ===
            candidate.values.data.name.toLocaleLowerCase("es")
      )
    ) {
      return Result.fail(new ResourceCatalogError("NAME_EXISTS"));
    }
    const invalidField = this.invalidField(candidate, scope, previous);
    if (invalidField) {
      return Result.fail(new ResourceCatalogError("FIELD_UNAVAILABLE"));
    }
    if (candidate === previous) {
      return Result.ok(this);
    }
    return Result.ok(
      new ResourceCatalog(
        {
          ...this.props,
          definitions: previous
            ? this.definitions.map((item) => (item.id.equals(candidate.id) ? candidate : item))
            : [...this.definitions, candidate],
        },
        this.id
      )
    );
  }
  private invalidField(
    candidate: ResourceDefinition,
    scope: Maybe<UniqueID>,
    previous?: ResourceDefinition
  ) {
    return candidate.values.fieldIds.some((id) => {
      const field = this.visible(scope).find((item) => item.id.equals(id));
      if (!field || field.values.data.kind !== "field") {
        return true;
      }
      return !(
        this.active(field, scope) ||
        previous?.values.fieldIds.some((existing) => existing.equals(id))
      );
    });
  }
  seed(
    stockKey: string,
    values: ResourceDefinitionValues
  ): Result<ResourceCatalog, ResourceCatalogError> {
    const previous = this.definitions.find((item) => item.stockKey.getOrUndefined() === stockKey);
    if (previous) {
      const upgraded = previous.initializeSections(values);
      if (upgraded === previous) {
        return Result.ok(this);
      }
      return Result.ok(
        new ResourceCatalog(
          {
            ...this.props,
            definitions: this.definitions.map((item) =>
              item.id.equals(previous.id) ? upgraded : item
            ),
          },
          this.id
        )
      );
    }
    return this.replace(
      ResourceDefinition.create(Maybe.none(), values, true, Maybe.some(stockKey)),
      Maybe.none()
    );
  }
  setActive(
    scope: Maybe<UniqueID>,
    id: UniqueID,
    active: boolean | null
  ): Result<ResourceCatalog, ResourceCatalogError> {
    const item = this.visible(scope).find((entry) => entry.id.equals(id));
    if (!item) {
      return Result.fail(new ResourceCatalogError("DEFINITION_NOT_FOUND"));
    }
    const company = scope.getOrUndefined();
    if (company && !item.companyId.getOrUndefined()) {
      const previous = this.availability.find(
        (entry) => entry.companyId.equals(company) && entry.definitionId.equals(id)
      );
      const value = active === null ? Maybe.none<boolean>() : Maybe.some(active);
      const changed = previous
        ? previous.update(value)
        : CatalogAvailability.create(company, id, value);
      if (previous === changed || (!previous && active === null)) {
        return Result.ok(this);
      }
      return Result.ok(
        new ResourceCatalog(
          {
            ...this.props,
            availability: previous
              ? this.availability.map((entry) => (entry.id.equals(previous.id) ? changed : entry))
              : [...this.availability, changed],
          },
          this.id
        )
      );
    }
    if (active === null) {
      return Result.fail(new ResourceCatalogError("INVALID_REQUEST"));
    }
    const changed = item.setActive(active);
    if (changed === item) {
      return Result.ok(this);
    }
    return Result.ok(
      new ResourceCatalog(
        {
          ...this.props,
          definitions: this.definitions.map((entry) => (entry.id.equals(id) ? changed : entry)),
        },
        this.id
      )
    );
  }
}
function sameScope(a: Maybe<UniqueID>, b: Maybe<UniqueID>) {
  return a.getOrUndefined()?.toPrimitive() === b.getOrUndefined()?.toPrimitive();
}