import { and, eq } from "drizzle-orm";
import type { PostgresJsDatabase } from "drizzle-orm/postgres-js";

import { PIPELINE_DEFAULT_ROLE_ROUTES } from "@tasks/shared/model-routing";

import type * as schema from "../schema/index";
import { modelProviders, roleModelRoutes } from "../schema/index";

type Database = PostgresJsDatabase<typeof schema>;

export type SeedDefaultRoleRoutesResult = {
  inserted: number;
  skipped: number;
};

/**
 * Inserts pipeline default role → alias routes for a workspace when matching
 * provider aliases already exist. Does not create providers.
 */
export async function seedDefaultRoleRoutes(
  db: Database,
  workspaceId: string,
): Promise<SeedDefaultRoleRoutesResult> {
  const providers = await db
    .select({ id: modelProviders.id, alias: modelProviders.alias })
    .from(modelProviders)
    .where(eq(modelProviders.workspaceId, workspaceId));

  const aliasToId = new Map(providers.map((row) => [row.alias, row.id]));
  let inserted = 0;
  let skipped = 0;
  let sortOrder = 0;

  for (const [roleId, alias] of Object.entries(PIPELINE_DEFAULT_ROLE_ROUTES)) {
    const providerId = aliasToId.get(alias);
    if (!providerId) {
      skipped++;
      continue;
    }

    const [existing] = await db
      .select({ id: roleModelRoutes.id })
      .from(roleModelRoutes)
      .where(
        and(
          eq(roleModelRoutes.workspaceId, workspaceId),
          eq(roleModelRoutes.roleId, roleId),
        ),
      )
      .limit(1);

    if (existing) {
      skipped++;
      continue;
    }

    await db.insert(roleModelRoutes).values({
      workspaceId,
      roleId,
      providerAliasId: providerId,
      sortOrder: sortOrder++,
    });
    inserted++;
  }

  return { inserted, skipped };
}