#!/usr/bin/env bash

set -euo pipefail

# If invoked from a linked worktree copy of this script, re-exec the canonical
# script from the repository root so behavior stays consistent across worktrees.
script_self="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/$(basename "${BASH_SOURCE[0]}")"
script_parent_dir="$(dirname "$script_self")"
if common_git_dir=$(git -C "$script_parent_dir" rev-parse --path-format=absolute --git-common-dir 2>/dev/null); then
  canonical_repo_root="$(dirname "$common_git_dir")"
  canonical_self="$canonical_repo_root/scripts/$(basename "${BASH_SOURCE[0]}")"
  if [ "$script_self" != "$canonical_self" ] && [ -x "$canonical_self" ]; then
    exec "$canonical_self" "$@"
  fi
fi

usage() {
  cat <<USAGE
Usage:
  scripts/pr ls
  scripts/pr gc [--dry-run]
  scripts/pr review-init <PR>
  scripts/pr review-checkout-main <PR>
  scripts/pr review-checkout-pr <PR>
  scripts/pr review-claim <PR>
  scripts/pr review-guard <PR>
  scripts/pr review-artifacts-init <PR>
  scripts/pr review-validate-artifacts <PR>
  scripts/pr review-tests <PR> <test-file> [<test-file> ...]
  scripts/pr prepare-init <PR>
  scripts/pr prepare-validate-commit <PR>
  scripts/pr prepare-gates <PR>
  scripts/pr prepare-push <PR>
  scripts/pr prepare-sync-head <PR>
  scripts/pr prepare-run <PR>
  scripts/pr merge-verify <PR>
  scripts/pr merge-run <PR>
USAGE
}

require_cmds() {
  local missing=()
  local cmd
  for cmd in git gh jq rg pnpm node; do
    if ! command -v "$cmd" >/dev/null 2>&1; then
      missing+=("$cmd")
    fi
  done

  if [ "${#missing[@]}" -gt 0 ]; then
    echo "Missing required command(s): ${missing[*]}"
    exit 1
  fi
}

# shellcheck disable=SC1091
source "$script_parent_dir/pr-lib/worktree.sh"
# shellcheck disable=SC1091
source "$script_parent_dir/pr-lib/common.sh"
# shellcheck disable=SC1091
source "$script_parent_dir/pr-lib/changelog.sh"
# shellcheck disable=SC1091
source "$script_parent_dir/pr-lib/gates.sh"
# shellcheck disable=SC1091
source "$script_parent_dir/pr-lib/push.sh"
# shellcheck disable=SC1091
source "$script_parent_dir/pr-lib/review.sh"
# shellcheck disable=SC1091
source "$script_parent_dir/pr-lib/prepare-core.sh"
# shellcheck disable=SC1091
source "$script_parent_dir/pr-lib/merge.sh"

main() {
  if [ "$#" -lt 1 ]; then
    usage
    exit 2
  fi

  require_cmds

  local cmd="${1-}"
  shift || true

  case "$cmd" in
    ls)
      list_pr_worktrees
      ;;
    gc)
      local dry_run=false
      if [ "${1-}" = "--dry-run" ]; then
        dry_run=true
      fi
      gc_pr_worktrees "$dry_run"
      ;;
    review-init)
      local pr="${1-}"
      [ -n "$pr" ] || { usage; exit 2; }
      review_init "$pr"
      ;;
    review-checkout-main)
      local pr="${1-}"
      [ -n "$pr" ] || { usage; exit 2; }
      review_checkout_main "$pr"
      ;;
    review-checkout-pr)
      local pr="${1-}"
      [ -n "$pr" ] || { usage; exit 2; }
      review_checkout_pr "$pr"
      ;;
    review-claim)
      local pr="${1-}"
      [ -n "$pr" ] || { usage; exit 2; }
      review_claim "$pr"
      ;;
    review-guard)
      local pr="${1-}"
      [ -n "$pr" ] || { usage; exit 2; }
      review_guard "$pr"
      ;;
    review-artifacts-init)
      local pr="${1-}"
      [ -n "$pr" ] || { usage; exit 2; }
      review_artifacts_init "$pr"
      ;;
    review-validate-artifacts)
      local pr="${1-}"
      [ -n "$pr" ] || { usage; exit 2; }
      review_validate_artifacts "$pr"
      ;;
    review-tests)
      local pr="${1-}"
      [ -n "$pr" ] || { usage; exit 2; }
      shift || true
      review_tests "$pr" "$@"
      ;;
    prepare-init)
      local pr="${1-}"
      [ -n "$pr" ] || { usage; exit 2; }
      prepare_init "$pr"
      ;;
    prepare-validate-commit)
      local pr="${1-}"
      [ -n "$pr" ] || { usage; exit 2; }
      prepare_validate_commit "$pr"
      ;;
    prepare-gates)
      local pr="${1-}"
      [ -n "$pr" ] || { usage; exit 2; }
      prepare_gates "$pr"
      ;;
    prepare-push)
      local pr="${1-}"
      [ -n "$pr" ] || { usage; exit 2; }
      prepare_push "$pr"
      ;;
    prepare-sync-head)
      local pr="${1-}"
      [ -n "$pr" ] || { usage; exit 2; }
      prepare_sync_head "$pr"
      ;;
    prepare-run)
      local pr="${1-}"
      [ -n "$pr" ] || { usage; exit 2; }
      prepare_run "$pr"
      ;;
    merge-verify)
      local pr="${1-}"
      [ -n "$pr" ] || { usage; exit 2; }
      merge_verify "$pr"
      ;;
    merge-run)
      local pr="${1-}"
      [ -n "$pr" ] || { usage; exit 2; }
      merge_run "$pr"
      ;;
    *)
      usage
      exit 2
      ;;
  esac
}

main "$@"