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

const ProjectSchema = z.object({
  name: z.string().min(1),
  customerId: z.string().uuid()
})

const ProjectUpdateSchema = ProjectSchema.partial()

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

  fastify.get("/", async (request, reply) => {
    const { onlyActive, customerId } = request.query as { onlyActive?: string, customerId?: string }
    const isActiveDefault = onlyActive !== "false"

    const conds = []
    if (isActiveDefault) conds.push(eq(projects.active, true))
    if (customerId) conds.push(eq(projects.customerId, customerId))

    const results = await db
      .select()
      .from(projects)
      .where(conds.length ? and(...conds) : undefined as any)
      .orderBy(projects.name)

    return results
  })

  fastify.get("/:id", async (request, reply) => {
    const { id } = request.params as { id: string }

    const [project] = await db
      .select()
      .from(projects)
      .where(eq(projects.id, id))
      .limit(1)

    if (!project) {
      return reply.code(404).send({ message: "Project not found" })
    }

    return project
  })

  fastify.post("/", async (request, reply) => {
    const body = ProjectSchema.parse(request.body)

    const [project] = await db
      .insert(projects)
      .values({
        name: body.name,
        customerId: body.customerId
      })
      .returning()

    return reply.code(201).send(project)
  })

  fastify.patch("/:id", async (request, reply) => {
    const { id } = request.params as { id: string }
    const body = ProjectUpdateSchema.parse(request.body)

    const [project] = await db
      .update(projects)
      .set(body)
      .where(eq(projects.id, id))
      .returning()

    if (!project) {
      return reply.code(404).send({ message: "Project not found" })
    }

    return project
  })

  fastify.delete("/:id", async (request, reply) => {
    const { id } = request.params as { id: string }

    const [project] = await db
      .update(projects)
      .set({ active: false })
      .where(eq(projects.id, id))
      .returning()

    if (!project) {
      return reply.code(404).send({ message: "Project not found" })
    }

    return reply.code(204).send()
  })
}

// Helper for the filter array since 'and' is needed
function and(...conditions: any[]) {
  return conditions.length > 0 ? conditions : undefined
}

// Overriding the local 'and' to use drizzle's actual 'and'
import { and as drizzleAnd } from "drizzle-orm"
const andHelper = drizzleAnd;