import { FastifyInstance } from "fastify"
import { eq } from "drizzle-orm"
import { z } from "zod"
import { db } from "../db"
import { appSettings } from "../db/schema"

const SettingsUpdateSchema = z.object({
  workspaceName: z.string().min(1).optional(),
  defaultBillable: z.boolean().optional(),
  weekStart: z.number().int().min(0).max(6).optional(),
})

export default async function settingsRoutes(fastify: FastifyInstance) {
  fastify.addHook("preHandler", async (request, reply) => {
    try {
      await request.jwtVerify()
    } catch {
      return reply.code(401).send({ message: "Unauthorized" })
    }
  })

  async function getOrCreate() {
    const rows = await db.select().from(appSettings).limit(1)
    if (rows.length > 0) return rows[0]
    const [created] = await db.insert(appSettings).values({}).returning()
    return created
  }

  fastify.get("/", async () => getOrCreate())

  fastify.patch("/", async (request, reply) => {
    const payload = request.user as { sub: string; role: string }
    if (payload.role !== "admin") {
      return reply.code(403).send({ message: "Admin only" })
    }
    const body = SettingsUpdateSchema.parse(request.body)
    const current = await getOrCreate()
    const [updated] = await db
      .update(appSettings)
      .set({ ...body, updatedAt: new Date() })
      .where(eq(appSettings.id, current.id))
      .returning()
    return updated
  })
}