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

# =============================================================
# Genex Frontend Flutter Build Script
# 用法: ./build.sh <app> <mode> [platform]
#
#   app:      mobile | admin-app
#   mode:     debug | release | clean
#   platform: apk | appbundle | ios (默认 apk)
#
# 示例:
#   ./build.sh mobile debug          # 构建消费者App debug APK
#   ./build.sh mobile release        # 构建消费者App release APK
#   ./build.sh admin-app debug       # 构建发行方App debug APK
#   ./build.sh admin-app release apk # 构建发行方App release APK
#   ./build.sh admin-app release appbundle  # 构建 AAB (Google Play)
#   ./build.sh mobile clean          # 清理构建缓存
#   ./build.sh all debug             # 同时构建两个App
# =============================================================

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
OUTPUT_DIR="$SCRIPT_DIR/build-output"

# 颜色
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m'

log()  { echo -e "${BLUE}[BUILD]${NC} $*"; }
ok()   { echo -e "${GREEN}[OK]${NC} $*"; }
warn() { echo -e "${YELLOW}[WARN]${NC} $*"; }
err()  { echo -e "${RED}[ERROR]${NC} $*" >&2; }

usage() {
    echo ""
    echo "用法: $0 <app> <mode> [platform]"
    echo ""
    echo "  app:      mobile | admin-app | all"
    echo "  mode:     debug | release | clean | run"
    echo "  platform: apk | appbundle | ios (默认 apk)"
    echo ""
    echo "示例:"
    echo "  $0 mobile debug              # debug APK"
    echo "  $0 mobile release            # release APK"
    echo "  $0 admin-app release         # release APK"
    echo "  $0 admin-app release appbundle  # release AAB"
    echo "  $0 mobile run                # 连接设备运行 debug"
    echo "  $0 mobile clean              # 清理缓存"
    echo "  $0 all debug                 # 构建全部"
    echo ""
    exit 1
}

check_flutter() {
    if ! command -v flutter &>/dev/null; then
        err "Flutter SDK 未安装或不在 PATH 中"
        exit 1
    fi
    log "Flutter $(flutter --version --machine 2>/dev/null | grep -o '"frameworkVersion":"[^"]*"' | cut -d'"' -f4 || flutter --version | head -1)"
}

get_app_dir() {
    local app="$1"
    case "$app" in
        mobile)    echo "$SCRIPT_DIR/mobile" ;;
        admin-app) echo "$SCRIPT_DIR/admin-app" ;;
        *) err "未知 app: $app"; exit 1 ;;
    esac
}

get_app_name() {
    local app="$1"
    case "$app" in
        mobile)    echo "Genex Consumer (消费者端)" ;;
        admin-app) echo "Genex Issuer (发行方端)" ;;
    esac
}

do_clean() {
    local app="$1"
    local app_dir
    app_dir="$(get_app_dir "$app")"

    log "清理 $(get_app_name "$app") ..."
    cd "$app_dir"
    flutter clean
    ok "清理完成"
}

do_build() {
    local app="$1"
    local mode="$2"
    local platform="${3:-apk}"
    local app_dir
    app_dir="$(get_app_dir "$app")"
    local app_name
    app_name="$(get_app_name "$app")"

    log "========================================="
    log "构建: $app_name"
    log "模式: $mode | 平台: $platform"
    log "========================================="

    cd "$app_dir"

    # 获取依赖
    log "获取依赖..."
    flutter pub get

    # 构建
    local build_cmd=""
    local output_path=""

    case "$platform" in
        apk)
            build_cmd="flutter build apk --$mode"
            if [ "$mode" = "release" ]; then
                output_path="$app_dir/build/app/outputs/flutter-apk/app-release.apk"
            else
                output_path="$app_dir/build/app/outputs/flutter-apk/app-debug.apk"
            fi
            ;;
        appbundle)
            build_cmd="flutter build appbundle --$mode"
            output_path="$app_dir/build/app/outputs/bundle/${mode}/app-${mode}.aab"
            ;;
        ios)
            if [ "$mode" = "debug" ]; then
                build_cmd="flutter build ios --debug --no-codesign"
            else
                build_cmd="flutter build ios --release"
            fi
            ;;
        *)
            err "未知平台: $platform"
            exit 1
            ;;
    esac

    log "执行: $build_cmd"
    $build_cmd

    # 复制产物到统一输出目录
    if [ -n "$output_path" ] && [ -f "$output_path" ]; then
        mkdir -p "$OUTPUT_DIR"
        local filename
        if [ "$platform" = "apk" ]; then
            filename="${app}-${mode}.apk"
        else
            filename="${app}-${mode}.aab"
        fi
        cp "$output_path" "$OUTPUT_DIR/$filename"
        ok "构建成功!"
        ok "产物: $OUTPUT_DIR/$filename"
        ok "大小: $(du -h "$OUTPUT_DIR/$filename" | cut -f1)"
    else
        ok "构建成功!"
        [ "$platform" = "ios" ] && ok "iOS 产物在: $app_dir/build/ios/"
    fi

    echo ""
}

do_run() {
    local app="$1"
    local app_dir
    app_dir="$(get_app_dir "$app")"

    log "运行 $(get_app_name "$app") (debug模式)..."
    cd "$app_dir"
    flutter pub get
    flutter run
}

# =============================================================
# 主逻辑
# =============================================================

[ $# -lt 2 ] && usage

APP="$1"
MODE="$2"
PLATFORM="${3:-apk}"

check_flutter

case "$MODE" in
    clean)
        if [ "$APP" = "all" ]; then
            do_clean mobile
            do_clean admin-app
        else
            do_clean "$APP"
        fi
        ;;
    run)
        if [ "$APP" = "all" ]; then
            err "不能同时运行两个 App，请指定一个"
            exit 1
        fi
        do_run "$APP"
        ;;
    debug|release)
        if [ "$APP" = "all" ]; then
            do_build mobile "$MODE" "$PLATFORM"
            do_build admin-app "$MODE" "$PLATFORM"
            echo ""
            ok "========================================="
            ok "全部构建完成! 产物目录: $OUTPUT_DIR/"
            ok "========================================="
            ls -lh "$OUTPUT_DIR/" 2>/dev/null || true
        else
            do_build "$APP" "$MODE" "$PLATFORM"
        fi
        ;;
    *)
        err "未知模式: $MODE"
        usage
        ;;
esac