import type { UniqueID } from "@repo/rdx-ddd";
import { Result, synchronizeTemplateStructure } from "@repo/rdx-utils";
import type { Sequelize, Transaction } from "sequelize";
import { QueryTypes } from "sequelize";

import { captureGlobalResourceSpecification } from "../../application/global-resource-specification";
import { validateOperatingSystemIdentity } from "../../application/operating-system-identity-policy";
import { captureResourceSpecification } from "../../application/resource-input.mapper";
import type { Resource } from "../../domain/resource.aggregate";
import type { ResourceCatalog } from "../../domain/resource-catalog.aggregate";
import { ResourceCatalogError } from "../../domain/resource-definition";
import { ResourceSpecification } from "../../domain/value-objects/resource-values.vo";

import { readInventory, readInventoryByIds } from "./resource-inventory-relational";
import { ResourcePersistenceMapper, inventoryIdentity } from "./resource-persistence.mapper";
import { ResourceScopeSchemaReader } from "./resource-scope-schema";

/** Prepara todas las compañías antes de escribir: un fallo de dominio no deja el catálogo a medio propagar. */
export async function prepareResourceTemplateUpdates(
  database: Sequelize,
  previous: ResourceCatalog,
  next: ResourceCatalog,
  actorId: UniqueID | undefined,
  transaction: Transaction
) {
  const updates: { previous: Resource; next: Resource }[] = [];

  if (!actorId) {
    return Result.ok(updates);
  }
  const templateIds = changedTemplateIds(previous, next);

  if (!templateIds.length) {
    return Result.ok(updates);
  }
  const mode = await new ResourceScopeSchemaReader(database).read();
  const companies = await database.query<{ companyId: string | null }>(
    "SELECT DISTINCT companyId FROM resources WHERE templateId IN (:templateIds) ORDER BY companyId",
    { replacements: { templateIds }, type: QueryTypes.SELECT, transaction }
  );
  const now = new Date().toISOString();
  const mapper = new ResourcePersistenceMapper();

  const owners = companies.map(({ companyId }) =>
    companyId === null ? null : inventoryIdentity(companyId)
  );

  const readResource =
    mode === "scoped" ? mapper.toScopedDomain.bind(mapper) : mapper.toDomain.bind(mapper);

  for (const owner of owners.filter((entry) => entry !== null)) {
    await database.query("SELECT id FROM companies WHERE id=:id FOR UPDATE", {
      replacements: { id: owner.toPrimitive() },
      type: QueryTypes.SELECT,
      transaction,
    });
    const loaded = await readInventory(database, owner.toPrimitive(), transaction);

    const resources = loaded.rows
      .filter((row) => templateIds.includes(row.templateId))
      .map((row) =>
        readResource(
          row,
          loaded.revisions.filter((revision) => revision.resourceId === row.id)
        )
      );

    if (resources.some((item) => !item.belongsToCompany(owner))) {
      throw new ResourceCatalogError("INVALID_RESOURCE_SCOPE");
    }
    const prepared = prepareTemplateUpdates(resources, next, actorId, now);

    if (!prepared.isSuccess) {
      return prepared;
    }
    updates.push(...prepared.data);
  }

  if (owners.includes(null)) {
    const identities = await database.query<{ id: string }>(
      "SELECT id FROM resources WHERE companyId IS NULL AND templateId IN (:templateIds) ORDER BY id",
      { replacements: { templateIds }, transaction, type: QueryTypes.SELECT }
    );
    const loaded = await readInventoryByIds(
      database,
      identities.map((row) => row.id),
      transaction
    );

    const resources = loaded.rows.map((row) =>
      mapper.toScopedDomain(
        row,
        loaded.revisions.filter((revision) => revision.resourceId === row.id)
      )
    );
    const prepared = prepareTemplateUpdates(resources, next, actorId, now);

    if (!prepared.isSuccess) {
      return prepared;
    }
    updates.push(...prepared.data);
  }

  return Result.ok(updates);
}

function prepareTemplateUpdates(
  resources: readonly Resource[],
  next: ResourceCatalog,
  actor: UniqueID,
  now: string
) {
  const updates: { previous: Resource; next: Resource }[] = [];

  for (const item of resources) {
    const changed = synchronizeResourceTemplate(item, next, actor, now);

    if (!changed.isSuccess) {
      return Result.fail(changed.error);
    }
    const error = validateOperatingSystemIdentity(changed.data, next);

    if (error) {
      return Result.fail(new ResourceCatalogError(error));
    }
    if (changed.data !== item) {
      updates.push({ previous: item, next: changed.data });
    }
  }

  return Result.ok(updates);
}

function synchronizeResourceTemplate(
  item: Resource,
  next: ResourceCatalog,
  actorId: UniqueID,
  now: string
) {
  const captured =
    item.scope === "global"
      ? captureGlobalResourceSpecification(next, item.values.toPrimitive().templateId, {
          existing: true,
          kind:
            next.definitions
              .find((definition) => definition.id.equals(item.specification.templateId))
              ?.stockKey.getOrUndefined() === "template:os"
              ? "os"
              : "application",
        })
      : captureResourceSpecification(
          { templateId: item.values.toPrimitive().templateId },
          item.requireCompanyId(),
          { catalog: next },
          { existing: true }
        );

  if (!captured.isSuccess) {
    return Result.fail(captured.error);
  }
  const integration = item.values.toPrimitive().integration;
  const protectedFieldIds =
    integration?.kind === "mailbox"
      ? [integration.addressFieldId, integration.contextFieldId]
      : integration?.kind === "access"
        ? [integration.referenceFieldId]
        : [];
  const structure = synchronizeTemplateStructure({
    previous: item.specification.toPrimitive(),
    next: captured.data.toPrimitive(),
    values: item.values.toPrimitive().characteristics,
    protectedFieldIds,
  });
  const specification = ResourceSpecification.create({
    ...captured.data.toPrimitive(),
    ...structure,
  });

  if (!specification.isSuccess) {
    return Result.fail(specification.error);
  }

  return item.scope === "global"
    ? item.synchronizeGlobalSpecification(specification.data, actorId, now)
    : item.synchronizeSpecification(specification.data, actorId, now);
}

function changedTemplateIds(previous: ResourceCatalog, next: ResourceCatalog) {
  return next.definitions
    .filter((definition) => {
      if (definition.values.data.kind !== "template") {
        return false;
      }
      const old = previous.definitions.find((item) => item.id.equals(definition.id));

      return (
        old &&
        (!old.values.equals(definition.values) ||
          definition.values.data.fields.some((binding) => {
            const field = next.definitions.find(
              (item) => item.id.toPrimitive() === binding.fieldId
            );
            const oldField = previous.definitions.find(
              (item) => item.id.toPrimitive() === binding.fieldId
            );

            return field && oldField && !field.values.equals(oldField.values);
          }))
      );
    })
    .map((item) => item.id.toPrimitive());
}