#!/bin/bash

# ---------------- CONFIG ----------------
PROJECTS_DIR="git_repo_project_files"  # Working clones
LFS_EXTENSIONS=("*.so" "*.zip" "*.bin")  # Large files to track

# ---------------- HARD-CODED TOKEN ----------------
GITHUB_TOKEN=""

# ---------------- VALIDATION ----------------
if [ $# -lt 3 ]; then
    echo "Usage: $0 <repo_name> <gitea_repo_url> <github_repo_url>"
    echo "Example: $0 solo-level-app-automation https://gitea.arulbalaji.xyz/arul/solo-level-app-automation.git https://github.com/username/repo.git"
    exit 1
fi

REPO_NAME="$1"
GITEA_URL="$2"
GITHUB_URL="$3"
WORKDIR="$PROJECTS_DIR/$REPO_NAME"

echo "🔹 Processing repository: $REPO_NAME"

# ---------------- CREATE BASE DIR ----------------
mkdir -p "$PROJECTS_DIR"

# ---------------- CLONE / UPDATE ----------------
if [ ! -d "$WORKDIR/.git" ]; then
    echo "Cloning from Gitea..."
    git clone "$GITEA_URL" "$WORKDIR" || { echo "❌ Clone failed"; exit 1; }
else
    echo "Working repo exists. Ensuring it's a proper checkout and pulling latest changes..."
    cd "$WORKDIR" || { echo "❌ Failed to enter directory"; exit 1; }
    git fetch origin
    git fetch github 2>/dev/null
    git pull origin main || echo "⚠️ Pull failed, continuing..."
    cd - >/dev/null
fi

cd "$WORKDIR" || { echo "❌ Failed to cd into $WORKDIR"; exit 1; }

# ---------------- GIT LFS ----------------
echo "Initializing Git LFS..."
git lfs install

echo "Tracking large files: ${LFS_EXTENSIONS[*]}"
for ext in "${LFS_EXTENSIONS[@]}"; do
    git lfs track "$ext"
done

# Commit .gitattributes if needed
if git status --porcelain | grep -q ".gitattributes"; then
    git add .gitattributes
    git commit -m "Track large files with Git LFS" || echo "⚠️ No commit needed"
fi

# ---------------- REWRITE HISTORY WITH LFS ----------------
echo "=== MIGRATING HISTORY TO LFS (this rewrites history) ==="

CMD="git lfs migrate import --include=\"*.so,*.zip,*.bin\" --everything --yes"
echo "Running: $CMD"

eval $CMD || { echo "❌ git lfs migrate import failed"; exit 1; }

echo "✔ History rewritten successfully."

# ---------------- GITHUB REMOTE ----------------
AUTH_URL="${GITHUB_URL/https:\/\//https://$GITHUB_TOKEN@}"

if ! git remote | grep -q github; then
    echo "Adding GitHub remote..."
    git remote add github "$AUTH_URL"
else
    echo "Updating GitHub remote URL..."
    git remote set-url github "$AUTH_URL"
fi

# ---------------- FORCE PUSH (because history changed) ----------------
echo "🚀 Force pushing rewritten history to GitHub..."
git push github --all --force
git push github --tags --force

echo
echo "✅ Done pushing $REPO_NAME to GitHub with rewritten LFS history!"
echo "🔥 Your GitHub repo is now clean and optimized."