import type PocketBase from "pocketbase";

/** Targeted, repeatable schema addition for task areas. Existing card rows are untouched. */
export async function ensureWorkAreaSchema(pb: PocketBase): Promise<string[]> {
  const changed: string[] = [];
  const projects = await pb.collections.getOne("projects");
  let areas = await pb.collections.getOne("work_areas").catch(() => null);
  if (!areas) {
    areas = await pb.collections.create({
      name: "work_areas",
      type: "base",
      listRule: '@request.auth.id != "" && (@request.auth.role = "owner" || project.client = @request.auth.client)',
      viewRule: '@request.auth.id != "" && (@request.auth.role = "owner" || project.client = @request.auth.client)',
      createRule: '@request.auth.role = "owner"',
      updateRule: '@request.auth.role = "owner"',
      deleteRule: '@request.auth.role = "owner"',
      fields: [
        { name: "project", type: "relation", required: true, collectionId: projects.id, maxSelect: 1, cascadeDelete: true },
        { name: "name", type: "text", required: true, max: 80, presentable: true },
        { name: "color", type: "text", required: true, max: 20 },
        { name: "created", type: "autodate", onCreate: true, onUpdate: false },
        { name: "updated", type: "autodate", onCreate: true, onUpdate: true },
      ],
      indexes: ["CREATE UNIQUE INDEX idx_work_areas_project_name ON work_areas (project, lower(name))"],
    });
    changed.push("work_areas collection");
  }
  if (!areas) throw new Error("Could not create work_areas");

  const cards = await pb.collections.getOne("cards");
  if (!cards.fields.some((field: { name: string }) => field.name === "work_area")) {
    await pb.collections.update(cards.id, {
      fields: [...(cards.fields as unknown[]), {
        name: "work_area", type: "relation", required: false,
        collectionId: areas.id, maxSelect: 1, cascadeDelete: false,
      }],
    });
    changed.push("cards.work_area field");
  }
  return changed;
}