#!/usr/bin/env bash

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
REPO_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
APP_DIR="$REPO_ROOT/apps/chanora_flutter"
PUBSPEC="$APP_DIR/pubspec.yaml"
OBOE_DIR="$(cd "$REPO_ROOT/.." && pwd)/oboe-rs"
DIST_DIR="$REPO_ROOT/dist/android"
TMP_DIR=""

cleanup() {
  if [[ -n "$TMP_DIR" && -d "$TMP_DIR" ]]; then
    rm -rf "$TMP_DIR"
  fi
}
trap cleanup EXIT

require_cmd() {
  local cmd=$1
  if ! command -v "$cmd" >/dev/null 2>&1; then
    echo "ERROR: required command '$cmd' is not on PATH." >&2
    exit 1
  fi
}

require_file() {
  local path=$1
  local label=$2
  if [[ ! -f "$path" ]]; then
    echo "ERROR: missing $label at $path" >&2
    exit 1
  fi
}

ensure_release_signing() {
  if [[ -n "${CHANORA_RELEASE_STORE_FILE:-}" ]]; then
    local missing=()
    [[ -n "${CHANORA_RELEASE_STORE_PASSWORD:-}" ]] || missing+=("CHANORA_RELEASE_STORE_PASSWORD")
    [[ -n "${CHANORA_RELEASE_KEY_ALIAS:-}" ]] || missing+=("CHANORA_RELEASE_KEY_ALIAS")
    [[ -n "${CHANORA_RELEASE_KEY_PASSWORD:-}" ]] || missing+=("CHANORA_RELEASE_KEY_PASSWORD")
    if (( ${#missing[@]} > 0 )); then
      printf 'ERROR: release signing is partially configured; missing %s\n' "${missing[*]}" >&2
      exit 1
    fi
    require_file "$CHANORA_RELEASE_STORE_FILE" "release keystore"
    return
  fi

  require_cmd keytool
  TMP_DIR="$(mktemp -d "${TMPDIR:-/tmp}/chanora-android-aab.XXXXXX")"

  export CHANORA_RELEASE_STORE_FILE="$TMP_DIR/chanora-release.keystore"
  export CHANORA_RELEASE_STORE_PASSWORD="${CHANORA_RELEASE_STORE_PASSWORD:-chanora-ci}"
  export CHANORA_RELEASE_KEY_ALIAS="${CHANORA_RELEASE_KEY_ALIAS:-chanora-ci}"
  export CHANORA_RELEASE_KEY_PASSWORD="${CHANORA_RELEASE_KEY_PASSWORD:-$CHANORA_RELEASE_STORE_PASSWORD}"

  keytool -genkeypair \
    -storetype PKCS12 \
    -keystore "$CHANORA_RELEASE_STORE_FILE" \
    -storepass "$CHANORA_RELEASE_STORE_PASSWORD" \
    -keypass "$CHANORA_RELEASE_KEY_PASSWORD" \
    -alias "$CHANORA_RELEASE_KEY_ALIAS" \
    -keyalg RSA \
    -keysize 2048 \
    -validity 3650 \
    -dname "CN=Chanora CI,O=Chanora,OU=Engineering,L=Seoul,S=Seoul,C=KR" \
    -noprompt >/dev/null 2>&1

  printf 'Generated ephemeral Android release keystore: %s\n' "$CHANORA_RELEASE_STORE_FILE"
}

main() {
  require_cmd flutter
  require_file "$PUBSPEC" "Flutter pubspec"

  if [[ ! -f "$OBOE_DIR/Cargo.toml" ]]; then
    cat >&2 <<EOF
ERROR: missing sibling oboe-rs checkout at:
  $OBOE_DIR

This repository's Android-targeted Rust manifest currently depends on a local
oboe-rs fork. Clone it before running this script:

  git clone https://github.com/edisonjwa/oboe-rs.git "$OBOE_DIR"
EOF
    exit 1
  fi

  ensure_release_signing

  local app_version
  app_version="$(sed -n 's/^version:[[:space:]]*//p' "$PUBSPEC" | head -n1)"
  if [[ -z "$app_version" ]]; then
    echo "ERROR: could not read version from $PUBSPEC" >&2
    exit 1
  fi

  (
    cd "$APP_DIR"
    flutter pub get
    flutter build appbundle --release
  )

  local source_aab="$APP_DIR/build/app/outputs/bundle/release/app-release.aab"
  require_file "$source_aab" "Android release app bundle"

  mkdir -p "$DIST_DIR"
  local output="$DIST_DIR/chanora-${app_version}-release.aab"
  cp "$source_aab" "$output"

  printf 'Built Android release bundle: %s\n' "$output"
}

main "$@"