#!/usr/bin/env bash

# ============================================================
# Lobby Systems - Fabric Build Script
# Linux / macOS
#
# Features:
# - Read version from gradle.properties
# - Check Java 25
# - Download Gradle 9.5.1 automatically if needed
# - Clean build
# - Ask for Git commit + push ONLY after BUILD SUCCESS
# ============================================================

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

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"

# ============================================================
# Helper functions
# ============================================================

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'
}

# ============================================================
# Read gradle.properties
# ============================================================

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")"

if [[ -z "$MOD_VERSION" ]]; then
    MOD_VERSION="unknown"
fi

if [[ -z "$MINECRAFT_VERSION" ]]; then
    MINECRAFT_VERSION="26.2"
fi

if [[ -z "$MAVEN_GROUP" ]]; then
    MAVEN_GROUP="id.dartokloning"
fi

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

# ============================================================
# Check Java
# ============================================================

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."

# ============================================================
# Prepare Gradle
# ============================================================

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."

# ============================================================
# Build
# ============================================================

info "Menjalankan clean build Lobby Systems v$MOD_VERSION..."

echo

"$GRADLE_BIN" clean build --no-daemon

BUILD_RESULT=$?

# ============================================================
# BUILD FAILED
# ============================================================

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

# ============================================================
# BUILD SUCCESS
# ============================================================

echo
separator
echo " BUILD SUCCESS"
separator

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

if [[ -f "$JAR_PATH" ]]; then

    echo "JAR:"
    echo "$JAR_PATH"

else

    warn "Build berhasil, tetapi JAR utama tidak ditemukan pada:"
    echo "$JAR_PATH"

fi

# ============================================================
# Ask whether to use Git
# ============================================================

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

# ============================================================
# Git Integration
# ============================================================

echo
separator
echo " Git Integration"
separator

# ------------------------------------------------------------
# Check Git
# ------------------------------------------------------------

if ! command -v git >/dev/null 2>&1; then

    error "Git tidak ditemukan di PATH."
    info "Build tetap berhasil."

    exit 0
fi

# ------------------------------------------------------------
# Check repository
# ------------------------------------------------------------

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
    echo "  git init"
    echo "  git branch -M main"
    echo "  git remote add origin <URL-GITEA>"
    echo

    exit 0
fi

# ------------------------------------------------------------
# Check source changes
# ------------------------------------------------------------

info "Memeriksa perubahan Git..."

CHANGES="$(git status --porcelain)"

if [[ -n "$CHANGES" ]]; then

    echo
    echo "Perubahan ditemukan:"
    echo

    git status --short

    echo

    read -r -p \
        "Commit message [Lobby Systems v$MOD_VERSION build]: " \
        COMMIT_MESSAGE

    if [[ -z "$COMMIT_MESSAGE" ]]; then

        TIMESTAMP="$(date '+%Y-%m-%d %H:%M:%S')"

        COMMIT_MESSAGE="Lobby Systems v$MOD_VERSION build - $TIMESTAMP"

    fi

    # --------------------------------------------------------
    # Git Add
    # --------------------------------------------------------

    info "Menambahkan perubahan ke staging..."

    if ! git add -A; then

        error "git add gagal."
        exit 2

    fi

    # --------------------------------------------------------
    # Git Commit
    # --------------------------------------------------------

    info "Membuat commit..."

    if ! git commit -m "$COMMIT_MESSAGE"; then

        error "git commit gagal."
        exit 2

    fi

else

    info "Tidak ada perubahan source yang perlu di-commit."
    info "Akan mencoba push commit yang sudah ada."

fi

# ============================================================
# Determine current branch
# ============================================================

CURRENT_BRANCH="$(git branch --show-current)"

if [[ -z "$CURRENT_BRANCH" ]]; then

    error "Tidak dapat menentukan branch Git aktif."
    exit 2

fi

info "Branch aktif: $CURRENT_BRANCH"

# ============================================================
# Check origin
# ============================================================

if ! git remote get-url origin >/dev/null 2>&1; then

    error "Remote Git 'origin' belum dikonfigurasi."

    echo
    echo "Tambahkan remote Gitea dengan:"
    echo
    echo "  git remote add origin <URL-GITEA>"
    echo

    info "Commit lokal tetap tersimpan."

    exit 2
fi

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

info "Remote origin: $REMOTE_URL"

# ============================================================
# Git Push
# ============================================================

info "Push ke origin/$CURRENT_BRANCH..."

if ! git push origin "$CURRENT_BRANCH"; then

    echo
    error "Git push gagal."
    info "Commit lokal tetap tersimpan."

    exit 2

fi

# ============================================================
# Complete
# ============================================================

echo
ok "Push ke Git/Gitea berhasil."

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

exit 0