#!/usr/bin/env bash
set -euo pipefail

ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
cd "$ROOT_DIR"

STAGE="${1:-}"

usage() {
  echo "Usage: bash ./scripts/quality-gate.sh <lint|fix|typecheck|pre-commit|pre-push|ci>" >&2
}

has_biome_config() {
  [[ -f "biome.json" ]] || [[ -f "biome.jsonc" ]]
}

run_biome() {
  local -a args=("$@")

  if [[ -x "$ROOT_DIR/node_modules/.bin/biome" ]]; then
    "$ROOT_DIR/node_modules/.bin/biome" "${args[@]}"
    return 0
  fi

  echo "biome: configuration detected but local biome binary is unavailable." >&2
  echo "Run 'npm install' (or add @biomejs/biome to devDependencies)." >&2
  exit 1
}

run_lint() {
  if ! has_biome_config; then
    echo "lint: skipped (no biome config found)"
    return 0
  fi

  run_biome check --no-errors-on-unmatched .
}

run_fix() {
  if ! has_biome_config; then
    echo "fix: skipped (no biome config found)"
    return 0
  fi

  run_biome check --write --no-errors-on-unmatched .
}

run_typecheck() {
  if [[ ! -f "$ROOT_DIR/tsconfig.json" ]]; then
    echo "typecheck: skipped (no tsconfig.json found)"
    return 0
  fi

  if [[ -x "$ROOT_DIR/node_modules/.bin/tsc" ]]; then
    "$ROOT_DIR/node_modules/.bin/tsc" --noEmit
    return 0
  fi

  echo "typecheck: tsconfig.json found but local tsc binary is unavailable." >&2
  echo "Run 'npm install' (or add typescript to devDependencies)." >&2
  exit 1
}

run_tests() {
  if [[ ! -d "$ROOT_DIR/tests" ]]; then
    echo "tests: skipped (no tests directory found)"
    return 0
  fi

  mapfile -t test_files < <(find "$ROOT_DIR/tests" -maxdepth 1 -type f -name "*.test.*" | sort)
  if [[ "${#test_files[@]}" -eq 0 ]]; then
    echo "tests: skipped (no test files matching tests/*.test.*)"
    return 0
  fi

  if ! command -v node >/dev/null 2>&1; then
    echo "tests: node is required to run tests." >&2
    exit 1
  fi

  node --test "${test_files[@]}"
}

run_structure_validation() {
  local args=()
  # For pre-commit, only validate staged files (not untracked)
  if [[ "$STAGE" == "pre-commit" ]]; then
    args+=("--staged-only")
  fi
  bash "$ROOT_DIR/scripts/validate-structure.sh" "${args[@]}"
}

run_pre_commit() {
  echo "== quality gate: pre-commit"
  run_structure_validation
  npm run lint
}

run_pre_push() {
  echo "== quality gate: pre-push"
  run_structure_validation
  npm run lint
  npm run typecheck
  run_tests
}

run_ci() {
  echo "== quality gate: ci"
  run_structure_validation
  npm run lint
  npm run typecheck
  run_tests
  npm pack --dry-run
}

case "$STAGE" in
  lint)
    run_lint
    ;;
  fix)
    run_fix
    ;;
  typecheck)
    run_typecheck
    ;;
  pre-commit)
    run_pre_commit
    ;;
  pre-push)
    run_pre_push
    ;;
  ci)
    run_ci
    ;;
  *)
    usage
    exit 1
    ;;
esac