import type { Actor } from "@rakazo/contracts";
import { GROUP_MEMBER_MAX, GROUP_MEMBER_MIN } from "@rakazo/contracts";
import { createGroupRepos, IsolationError, type PrismaClient } from "@rakazo/db";

export async function createProject(
  deps: { prisma: PrismaClient },
  input: {
    actor: Actor;
    createdByBotId: string;
    name: string;
    botIds?: string[];
  },
) {
  const name = input.name.trim();
  if (!name) return { error: "Project name is required." };

  const botIds = [...new Set([input.createdByBotId, ...(input.botIds ?? [])])];
  if (botIds.length < GROUP_MEMBER_MIN) {
    return {
      error: `At least ${GROUP_MEMBER_MIN} agents are required. Include bot_id values for other teammates.`,
    };
  }
  if (botIds.length > GROUP_MEMBER_MAX) {
    return { error: `At most ${GROUP_MEMBER_MAX} agents are allowed in one project.` };
  }

  const groupRepos = createGroupRepos(deps.prisma);
  try {
    const group = await groupRepos.createGroup(input.actor, { name, botIds });
    return {
      ok: true as const,
      groupId: group.id,
      name: group.name,
      threadId: group.threadId,
      memberCount: group.members.length,
    };
  } catch (error) {
    if (error instanceof IsolationError) {
      return { error: "One or more agents could not be added to the project." };
    }
    throw error;
  }
}