import { randomUUID } from "node:crypto";
import type { FastifyInstance } from "fastify";
import { eq, laneDevices, setupState, type Db } from "@parking/db";
import {
  registerBuiltinDrivers,
  registry,
  setDeviceLogSink,
  type DeviceCategory,
} from "@parking/devices";
import { requireRole } from "../auth.js";

// First-run setup API. The admin reads the driver catalog and assigns devices
// per lane. See wiki/concepts/first-run-setup.md.

interface AssignBody {
  lane: number;
  category: DeviceCategory;
  driverId: string;
  config: Record<string, string | number | boolean>;
}

export async function setupRoutes(app: FastifyInstance, db: Db): Promise<void> {
  registerBuiltinDrivers();
  setDeviceLogSink((line) => app.log.info(line));

  // Catalog of selectable drivers per category (no secrets — schema only).
  app.get("/api/setup/catalog", async () => registry.catalog());

  // Current setup status + assignments.
  app.get(
    "/api/setup/state",
    { preHandler: requireRole("admin") },
    async () => {
      const state = await db.select().from(setupState).where(eq(setupState.id, 1)).get();
      const assignments = await db.select().from(laneDevices).all();
      return { completedAt: state?.completedAt ?? null, assignments };
    },
  );

  // Assign a device to a lane. Validates the chosen driver + config against the
  // registry before persisting; rejects unknown drivers / missing config.
  app.post<{ Body: AssignBody }>(
    "/api/setup/assign",
    { preHandler: requireRole("admin") },
    async (req, reply) => {
      const { lane, category, driverId, config } = req.body;
      const driver = registry.get(driverId);
      if (!driver || driver.category !== category) {
        return reply.code(400).send({ error: `invalid driver for ${category}: ${driverId}` });
      }
      try {
        registry.create(driverId, config); // validates required fields
      } catch (err) {
        return reply.code(400).send({ error: (err as Error).message });
      }
      const row = {
        id: randomUUID(),
        lane,
        category,
        driverId,
        config,
        enabled: true,
      };
      await db.insert(laneDevices).values(row);
      return reply.code(201).send(row);
    },
  );

  // Mark first-run setup complete.
  app.post(
    "/api/setup/complete",
    { preHandler: requireRole("admin") },
    async () => {
      const completedAt = new Date().toISOString();
      await db
        .insert(setupState)
        .values({ id: 1, completedAt })
        .onConflictDoUpdate({ target: setupState.id, set: { completedAt } });
      return { completedAt };
    },
  );
}