import { createHash } from "node:crypto";

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

import { ProcessTemplate } from "../../domain/process-template.aggregate";
import { ProcessTemplateRevision } from "../../domain/process-template-revision.entity";
import { ProcessTemplateInputSchema } from "../../domain/process-values";
import { ProcessTemplateValues } from "../../domain/value-objects/process-template-values";

import { persistedJson } from "./work-profile-persistence.mapper";
export type ProcessTemplateRow = { id: string; nameKey: string; values: unknown };
export type ProcessTemplateRevisionRow = {
  id: string;
  itemId: string;
  position: number;
  actorId: string | null;
  recordedAt: string;
  values: unknown;
};
function identity(value: string) {
  const parsed = UniqueID.create(value);
  if (!parsed.isSuccess) {
    throw new Error("Identidad de proceso inconsistente.");
  }
  return parsed.data;
}
function mapped(raw: unknown) {
  const values = ProcessTemplateValues.create(ProcessTemplateInputSchema.parse(persistedJson(raw)));
  if (!values.isSuccess) {
    throw new Error("Valores de proceso inconsistentes.");
  }
  return values.data;
}
export class ProcessTemplatePersistenceMapper {
  toDomain(row: ProcessTemplateRow, revisions: readonly ProcessTemplateRevisionRow[]) {
    const values = mapped(row.values);
    const ordered = [...revisions].sort((a, b) => a.position - b.position);
    const history = ordered.map((r, index) => {
      if (
        r.itemId !== row.id ||
        r.position !== index ||
        !z.iso.datetime().safeParse(r.recordedAt).success ||
        r.recordedAt < (ordered[index - 1]?.recordedAt ?? "") ||
        (!r.actorId && index !== 0)
      ) {
        throw new Error("Historial de proceso inconsistente.");
      }
      return ProcessTemplateRevision.rehydrate(
        {
          values: mapped(r.values),
          actorId: r.actorId ? Maybe.some(identity(r.actorId)) : Maybe.none(),
          recordedAt: r.recordedAt,
        },
        identity(r.id)
      );
    });
    if (
      !(history.length && history.at(-1)?.values.equals(values)) ||
      row.nameKey !== processTemplateNameKey(values.name.toPrimitive())
    ) {
      throw new Error("Raíz de proceso inconsistente.");
    }

    return ProcessTemplate.rehydrate({ values, history }, identity(row.id));
  }
  toPersistence(item: ProcessTemplate) {
    const values = item.values.toPrimitive();
    return {
      root: {
        id: item.id.toPrimitive(),
        nameKey: processTemplateNameKey(values.name),
        values: JSON.stringify(values),
      },
      revisions: item.history.map((r, position) => ({
        id: r.id.toPrimitive(),
        itemId: item.id.toPrimitive(),
        position,
        actorId: r.actorId.getOrUndefined()?.toPrimitive() ?? null,
        recordedAt: r.recordedAt,
        values: JSON.stringify(r.values.toPrimitive()),
      })),
    };
  }
}

export function processTemplateNameKey(name: string) {
  return createHash("sha256").update(name.toLowerCase()).digest("hex");
}