import { resolve } from "path"
import { existsSync } from "fs"
import { die } from "../fmt.ts"
import { requireSession } from "./helpers.ts"

export async function action(branch: string, file: string) {
  const editor = process.env.EDITOR
  if (!editor) {
    die("$EDITOR is not set.")
  }

  const { session } = await requireSession(branch)
  const worktree = resolve(session.worktree)
  const path = resolve(worktree, file)

  if (!path.startsWith(worktree + "/") && path !== worktree) {
    die("File path escapes the worktree.")
  }

  if (!existsSync(path)) {
    die(`File not found: ${file}`)
  }

  const [cmd, ...args] = editor.split(/\s+/)
  const proc = Bun.spawn([cmd, ...args, path], {
    stdin: "inherit",
    stdout: "inherit",
    stderr: "inherit",
  })

  const exitCode = await proc.exited
  if (exitCode !== 0) {
    die(`Editor exited with code ${exitCode}.`)
  }
}