/** Project inception (milestone 297): what a project was decided to inherit. */
import { apiGet, apiPost } from "@/api/client";
import type { ProjectPlatform } from "@/api/platforms";

export interface InceptionChoices {
  design_system_id: number | null;
  seed_systems: boolean;
  /** Platform slugs (milestone 463). null = not answered; a list is the
   *  whole answer — members left out of it are recorded as "not this".
   *  Absent on records decided before the question existed. */
  platforms?: string[] | null;
}

export interface InceptionRecord {
  decided_at: string;
  decided_by: number | null;
  via: "mcp" | "ui" | "legacy";
  choices: InceptionChoices;
}

export interface InceptionDefaults {
  design_system_id: number | null;
  design_systems: { id: number; title: string }[];
  systems: number;
  platforms: { slug: string; name: string }[];
  /** What detection (or an earlier answer) already says about the project. */
  project_platforms: ProjectPlatform[];
}

export interface InceptionDecision {
  project_id: number;
  inception: InceptionRecord;
  effects: {
    design_system_id: number | null;
    systems_seeded: string[];
    /** The project's answers after the decision; null when left unstated. */
    platforms: ProjectPlatform[] | null;
  };
}

export const emptyChoices = (): InceptionChoices => ({
  design_system_id: null, seed_systems: false, platforms: null,
});

export const fetchInceptionDefaults = (projectId: number) =>
  apiGet<InceptionDefaults>(`/api/projects/${projectId}/inception/defaults`);

export const decideInception = (projectId: number, choices: InceptionChoices) =>
  apiPost<InceptionDecision>(`/api/projects/${projectId}/inception`, { choices });