import { err, ok, type CommandContext } from "@tailor-platform/erp-kit/core";
import type { Transaction } from "../generated/kysely-tailordb";
import { InvalidBodyError, ItemNotFoundError } from "../lib/errors.generated";

export interface CreatePipelineItemCommentInput {
  itemId: string;
  body: string;
}

const COMMENT_OWN_KEYS = new Set(["itemId", "body"]);

export async function run<CF extends Record<string, unknown>>(
  db: Transaction,
  input: CreatePipelineItemCommentInput & CF,
  ctx: CommandContext,
) {
  // Consumer extension fields (declared via defineModule's pipelineItemComment.fields)
  // pass through to the insert untouched.
  const customFields: Record<string, unknown> = {};
  for (const [key, value] of Object.entries(input as Record<string, unknown>)) {
    if (!COMMENT_OWN_KEYS.has(key)) {
      customFields[key] = value;
    }
  }

  const item = await db
    .selectFrom("PipelineItem")
    .selectAll()
    .where("id", "=", input.itemId)
    .executeTakeFirst();

  if (!item) {
    return err(new ItemNotFoundError(input.itemId));
  }

  if (!input.body.trim()) {
    return err(new InvalidBodyError(input.itemId));
  }

  const comment = await db
    .insertInto("PipelineItemComment")
    .values({
      ...customFields,
      itemId: input.itemId,
      authorUserId: ctx.actorId,
      body: input.body,
      createdAt: new Date(),
    })
    .returningAll()
    .executeTakeFirstOrThrow();

  return ok({ comment });
}