#!/usr/bin/env bash

# === Motivation ===
# Keep the official installer as the configuration authority.

# === Problem Statement ===
# We need a clean handoff so the installer uses existing mounts without reformatting.

# === Scope ===
# In scope: instructions and guardrails for the user during the installer run.
# Out of scope: automated installer configuration.

# === Concepts ===
# Handoff: a pause where the wrapper delegates to the installer.

# === Decisions ===
# Provide clear, minimal guidance to avoid overriding prepared filesystems.
# Support only CLI installer flow to keep guidance consistent.

# === Alternatives Considered ===
# Fully scripted installation rejected for this phase.

# === Constraints ===
# The wrapper must not hide or alter installer behavior.

# === Open Questions ===
# Should we provide a checklist or step-by-step guide during the installer handoff?
# How do we detect if the installer reformatted filesystems against our intent?
# Should we monitor the installer process, or fully delegate control?

# === Success Criteria ===
# The installer completes using the prepared mounts without reformatting.

run_installer() {
  : "${MOUNT_ROOT:?Mount root is required}"
  : "${ESP_MOUNT:?ESP mount path is required}"
  if ! findmnt "$MOUNT_ROOT" >/dev/null 2>&1; then
    die "Mount root not found: $MOUNT_ROOT"
  fi
  if ! findmnt "$ESP_MOUNT" >/dev/null 2>&1; then
    die "ESP mount not found: $ESP_MOUNT"
  fi

  log_info "Installer handoff: use the prepared mounts without formatting."
  log_info "In the installer: choose manual partitioning and only set mountpoints."

  if [[ "${SKIP_INSTALLER:-0}" -eq 1 ]]; then
    log_warn "Skipping installer per request."
    return 0
  fi

  read -r -p "Press Enter to launch void-installer..." _

  if command -v void-installer >/dev/null 2>&1; then
    void-installer
  else
    log_warn "void-installer not found. Run it manually in another shell."
  fi

  read -r -p "Press Enter once the installer is complete..." _

  # Verify critical mounts are still intact after installer
  if ! findmnt "$MOUNT_ROOT" >/dev/null 2>&1; then
    die "Root mount disappeared after installer. The installer may have reformatted the filesystem."
  fi
  if ! findmnt "$ESP_MOUNT" >/dev/null 2>&1; then
    die "ESP mount disappeared after installer. The installer may have reformatted the filesystem."
  fi

  log_info "Mount verification passed."
}