import "dotenv/config"
import path from "node:path"

import { defineConfig } from "prisma/config"

const PROJECT_ROOT = process.cwd()
const PRISMA_DIR = path.join(PROJECT_ROOT, "prisma")

function resolveFileUrl(url: string) {
  if (!url.startsWith("file:")) {
    return url
  }

  const filePath = url.slice("file:".length)

  if (filePath.startsWith("//")) {
    return url
  }

  if (path.isAbsolute(filePath)) {
    return `file:${path.normalize(filePath)}`
  }

  const normalized = path.normalize(filePath)
  const prismaPrefix = `prisma${path.sep}`
  const relativeToPrisma = normalized.startsWith(prismaPrefix)
    ? normalized.slice(prismaPrefix.length)
    : normalized

  const absolutePath = path.resolve(PRISMA_DIR, relativeToPrisma)

  if (!absolutePath.startsWith(PROJECT_ROOT)) {
    throw new Error(`DATABASE_URL path escapes project directory: ${filePath}`)
  }

  return `file:${absolutePath}`
}

function normalizeDatasourceUrl(envUrl?: string | null) {
  const trimmed = envUrl?.trim()
  if (trimmed) {
    return resolveFileUrl(trimmed)
  }

  if (process.env.NODE_ENV === "production") {
    return "file:/app/data/db.sqlite"
  }

  return resolveFileUrl("file:./db.dev.sqlite")
}

export default defineConfig({
  schema: path.join("prisma", "schema.prisma"),
  migrations: {
    path: path.join("prisma", "migrations"),
  },
  datasource: {
    url: normalizeDatasourceUrl(process.env.DATABASE_URL),
  },
})