#!/usr/bin/env bash

# ============================================================
# Lobby Systems - Fabric Build Script
# Linux / macOS
# ============================================================

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
cd "$SCRIPT_DIR" || exit 1

BUILD_ONLY=0
if [[ "${1:-}" == "--build-only" ]]; then
    BUILD_ONLY=1
fi

GRADLE_PROPERTIES="$SCRIPT_DIR/gradle.properties"
LOCAL_GRADLE_DIR="$SCRIPT_DIR/.gradle-local"
GRADLE_VERSION="9.5.1"
GRADLE_HOME="$LOCAL_GRADLE_DIR/gradle-$GRADLE_VERSION"
GRADLE_BIN="$GRADLE_HOME/bin/gradle"
GIT_ONLY=0

info() { echo "[INFO] $1"; }
ok() { echo "[OK] $1"; }
warn() { echo "[WARN] $1"; }
error() { echo "[ERROR] $1"; }
separator() { echo "============================================"; }

read_property() {
    local key="$1"
    grep -E "^${key}=" "$GRADLE_PROPERTIES" | head -n 1 | cut -d'=' -f2- | tr -d '\r'
}

suggest_commit_message() {
    SUGGESTED_COMMIT="Update Lobby Systems v$MOD_VERSION"
}

push_branch_with_retry() {
    local round=1
    local attempt

    while true; do
        attempt=1
        while [[ $attempt -le 3 ]]; do
            echo
            info "Push attempt $attempt/3 (round $round) ke origin/$CURRENT_BRANCH..."
            if git push origin "$CURRENT_BRANCH"; then
                return 0
            fi

            warn "Push attempt $attempt/3 gagal."
            if [[ $attempt -lt 3 ]]; then
                info "Mencoba lagi dalam 2 detik..."
                sleep 2
            fi
            attempt=$((attempt + 1))
        done

        echo
        separator
        echo " GIT PUSH FAILED - 3 ATTEMPTS"
        separator
        info "Commit lokal tetap aman dan tidak perlu compile ulang."
        read -r -p "Coba push 3x lagi? [Y/N]: " RETRY_CONFIRM
        case "$RETRY_CONFIRM" in
            y|Y|yes|YES|Yes) round=$((round + 1)) ;;
            *) return 1 ;;
        esac
    done
}

run_git_integration() {
    echo
    separator
    echo " Git Integration"
    separator
    if [[ $GIT_ONLY -eq 1 ]]; then
        info "Mode Git-only: build dilewati karena JAR v$MOD_VERSION sudah tersedia."
    fi

    if ! command -v git >/dev/null 2>&1; then
        error "Git tidak ditemukan di PATH."
        return 2
    fi

    if ! git rev-parse --is-inside-work-tree >/dev/null 2>&1; then
        error "Folder ini belum menjadi Git repository."
        echo
        echo "Jalankan terlebih dahulu:"
        echo "  git init"
        echo "  git branch -M main"
        echo "  git remote add origin <URL-GITEA>"
        return 2
    fi

    info "Memeriksa perubahan Git..."
    CHANGES="$(git status --porcelain)"

    if [[ -n "$CHANGES" ]]; then
        echo
        echo "Perubahan ditemukan:"
        echo
        git status --short
        echo

        suggest_commit_message
        echo "[SUGGEST] Commit message: $SUGGESTED_COMMIT"
        info "Tekan Enter untuk memakai saran tersebut, atau ketik pesan sendiri."
        read -r -p "Commit message [$SUGGESTED_COMMIT]: " COMMIT_MESSAGE
        [[ -z "$COMMIT_MESSAGE" ]] && COMMIT_MESSAGE="$SUGGESTED_COMMIT"

        info "Menambahkan perubahan ke staging..."
        if ! git add -A; then
            error "git add gagal."
            return 2
        fi

        info "Membuat commit..."
        if ! git commit -m "$COMMIT_MESSAGE"; then
            error "git commit gagal."
            return 2
        fi
    else
        info "Tidak ada perubahan source yang perlu di-commit."
        info "Akan mencoba push commit lokal yang belum terkirim, jika ada."
    fi

    CURRENT_BRANCH="$(git branch --show-current)"
    if [[ -z "$CURRENT_BRANCH" ]]; then
        error "Tidak dapat menentukan branch Git aktif."
        return 2
    fi

    info "Branch aktif: $CURRENT_BRANCH"

    if ! git remote get-url origin >/dev/null 2>&1; then
        error "Remote Git 'origin' belum dikonfigurasi."
        info "Commit lokal tetap tersimpan."
        return 2
    fi

    REMOTE_URL="$(git remote get-url origin)"
    info "Remote origin: $REMOTE_URL"

    if ! push_branch_with_retry; then
        return 2
    fi

    echo
    ok "Push ke Git/Gitea berhasil."
    return 0
}

if [[ ! -f "$GRADLE_PROPERTIES" ]]; then
    error "gradle.properties tidak ditemukan."
    exit 1
fi

MOD_VERSION="$(read_property "mod_version")"
MINECRAFT_VERSION="$(read_property "minecraft_version")"
MAVEN_GROUP="$(read_property "maven_group")"

[[ -z "$MOD_VERSION" ]] && MOD_VERSION="unknown"
[[ -z "$MINECRAFT_VERSION" ]] && MINECRAFT_VERSION="26.2"
[[ -z "$MAVEN_GROUP" ]] && MAVEN_GROUP="id.dartokloning"

JAR_PATH="$SCRIPT_DIR/build/libs/lobby-systems-$MOD_VERSION.jar"

separator
echo " Lobby Systems - Fabric $MINECRAFT_VERSION Build"
echo " Version: $MOD_VERSION"
echo " Namespace: id.dartokloning.lobbysystems"
echo " Mod ID: dartokloning"
separator

if [[ $BUILD_ONLY -eq 0 && -f "$JAR_PATH" ]]; then
    echo
    info "JAR untuk v$MOD_VERSION sudah pernah dibuild:"
    echo "       $JAR_PATH"
    echo
    read -r -p "[C] Compile ulang / [G] Git saja: " EXISTING_ACTION
    case "$EXISTING_ACTION" in
        g|G|git|GIT|Git)
            GIT_ONLY=1
            if run_git_integration; then
                echo
                separator
                echo " Lobby Systems v$MOD_VERSION selesai."
                separator
                exit 0
            fi
            echo
            separator
            echo " GIT FAILED"
            separator
            info "Build tidak dijalankan; JAR v$MOD_VERSION yang sudah ada tetap aman."
            info "Commit lokal tetap tersimpan."
            exit 2
            ;;
        *) ;;
    esac
fi

if ! command -v java >/dev/null 2>&1; then
    error "Java tidak ditemukan di PATH."
    echo "Install JDK 25 lalu jalankan script lagi."
    exit 1
fi

JAVA_PATH="$(command -v java)"
info "Java executable: $JAVA_PATH"

JAVA_VERSION_OUTPUT="$(java --version 2>&1 | head -n 1)"
JAVA_VERSION="$(echo "$JAVA_VERSION_OUTPUT" | awk '{print $2}')"
JAVA_MAJOR="$(echo "$JAVA_VERSION" | cut -d'.' -f1)"

if [[ "$JAVA_MAJOR" != "25" ]]; then
    error "Java 25 diperlukan."
    echo "[INFO] Java yang terdeteksi:"
    echo "       $JAVA_VERSION_OUTPUT"
    exit 1
fi

ok "Java 25 terdeteksi."

if [[ ! -x "$GRADLE_BIN" ]]; then
    info "Gradle $GRADLE_VERSION belum tersedia."
    info "Mengunduh distribusi resmi..."

    mkdir -p "$LOCAL_GRADLE_DIR"

    GRADLE_ZIP="$LOCAL_GRADLE_DIR/gradle-$GRADLE_VERSION-bin.zip"
    GRADLE_URL="https://services.gradle.org/distributions/gradle-$GRADLE_VERSION-bin.zip"

    if command -v curl >/dev/null 2>&1; then
        curl -L --fail --progress-bar "$GRADLE_URL" -o "$GRADLE_ZIP"
        DOWNLOAD_RESULT=$?
    elif command -v wget >/dev/null 2>&1; then
        wget "$GRADLE_URL" -O "$GRADLE_ZIP"
        DOWNLOAD_RESULT=$?
    else
        error "curl atau wget tidak ditemukan."
        exit 1
    fi

    if [[ $DOWNLOAD_RESULT -ne 0 ]]; then
        error "Gagal mengunduh Gradle $GRADLE_VERSION."
        exit 1
    fi

    info "Mengekstrak Gradle $GRADLE_VERSION..."

    if ! command -v unzip >/dev/null 2>&1; then
        error "Command 'unzip' tidak ditemukan."
        exit 1
    fi

    unzip -q -o "$GRADLE_ZIP" -d "$LOCAL_GRADLE_DIR"
    EXTRACT_RESULT=$?

    if [[ $EXTRACT_RESULT -ne 0 ]]; then
        error "Gagal mengekstrak Gradle."
        exit 1
    fi

    rm -f "$GRADLE_ZIP"
fi

if [[ ! -x "$GRADLE_BIN" ]]; then
    error "Gradle executable tidak ditemukan:"
    echo "$GRADLE_BIN"
    exit 1
fi

ok "Gradle $GRADLE_VERSION tersedia."
info "Menjalankan clean build Lobby Systems v$MOD_VERSION..."
echo

"$GRADLE_BIN" clean build --no-daemon
BUILD_RESULT=$?

if [[ $BUILD_RESULT -ne 0 ]]; then
    echo
    separator
    echo " BUILD FAILED"
    separator
    echo
    error "Build gagal dengan exit code $BUILD_RESULT."
    info "Git Integration tidak dijalankan."
    exit "$BUILD_RESULT"
fi

echo
separator
echo " BUILD SUCCESS"
separator

if [[ -f "$JAR_PATH" ]]; then
    echo "JAR:"
    echo "$JAR_PATH"
else
    warn "Build berhasil, tetapi JAR utama tidak ditemukan pada:"
    echo "$JAR_PATH"
fi

if [[ $BUILD_ONLY -eq 1 ]]; then
    exit 0
fi

echo
read -r -p "Commit dan push perubahan ke Git/Gitea? [Y/N]: " GIT_CONFIRM
case "$GIT_CONFIRM" in
    y|Y|yes|YES|Yes) ;;
    *)
        echo
        info "Git commit/push dilewati."
        echo
        separator
        echo " Lobby Systems v$MOD_VERSION selesai."
        separator
        exit 0
        ;;
esac

if ! run_git_integration; then
    echo
    separator
    echo " GIT FAILED"
    separator
    info "Build Lobby Systems tetap berhasil."
    info "Commit lokal tetap tersimpan."
    info "Jalankan compile.sh lagi; jika JAR versi sama terdeteksi, pilih G untuk Git-only."
    exit 2
fi

echo
separator
echo " Lobby Systems v$MOD_VERSION selesai."
separator
exit 0