#!/bin/bash
set -euo pipefail
IFS=$'\n\t'

# ────────────────
# Configuration
# ────────────────
GIT_REMOTE_NAME="gitlab"
REPO_NAME=$(basename "$(pwd)")
DEFAULT_NAME="Mark Randall Havens"
DEFAULT_EMAIL="mark.r.havens@gmail.com"
GITLAB_WEB="https://gitlab.com"
GITLAB_API="$GITLAB_WEB/api/v4"
GITLAB_SSH="git@gitlab.com"
TOKEN_FILE="$HOME/.gitfield_token"
SCRIPT_VERSION="1.0"

info()  { echo -e "\e[1;34m[INFO]\e[0m $*"; }
warn()  { echo -e "\e[1;33m[WARN]\e[0m $*"; }
error() { echo -e "\e[1;31m[ERROR]\e[0m $*" >&2; exit 1; }

RESET_TOKEN=false
if [[ "${1:-}" == "--reset-token" ]]; then
  RESET_TOKEN=true
  rm -f "$TOKEN_FILE"
  info "Token reset requested."
fi

if [ -f "$TOKEN_FILE" ] && [ "$RESET_TOKEN" = false ]; then
  TOKEN=$(<"$TOKEN_FILE")
  info "Using cached token from $TOKEN_FILE"
else
  echo
  echo "🔐 Paste your GitLab Personal Access Token (scopes: api, read_user, write_repository, write_ssh_key)"
  echo "→ Generate at: $GITLAB_WEB/-/user_settings/personal_access_tokens"
  read -rp "🔑 Token: " TOKEN
  echo "$TOKEN" > "$TOKEN_FILE"
  chmod 600 "$TOKEN_FILE"
  info "Token saved for future use at $TOKEN_FILE"
fi

sudo apt update -qq
sudo apt install -y git curl jq openssh-client lsb-release || error "Tool install failed"

# Identity

git config --global user.name "$DEFAULT_NAME"
git config --global user.email "$DEFAULT_EMAIL"
info "Git identity set to: $DEFAULT_NAME <$DEFAULT_EMAIL>"

if [ ! -d .git ]; then
  git init
  git add .
  git commit -m "Initial commit"
fi

if ! git rev-parse HEAD &>/dev/null; then
  git add . && git commit -m "Initial commit" || warn "Nothing to commit"
fi

# SSH Setup

if [ ! -f ~/.ssh/id_rsa ]; then
  ssh-keygen -t rsa -b 4096 -C "$DEFAULT_EMAIL" -f ~/.ssh/id_rsa -N "" || error "SSH keygen failed"
fi

eval "$(ssh-agent -s)"
ssh-add ~/.ssh/id_rsa || error "Failed to add SSH key"

USERNAME=$(curl -s --header "PRIVATE-TOKEN: $TOKEN" "$GITLAB_API/user" | jq -r '.username') || error "Invalid token"
info "GitLab username: $USERNAME"

if ! ssh -T "$GITLAB_SSH" 2>&1 | grep -q "Welcome"; then
  PUBKEY=$(<~/.ssh/id_rsa.pub)
  TITLE="AutoKey-$(hostname)-$(date +%s)"
  curl -s --fail -X POST "$GITLAB_API/user/keys" \
    -H "PRIVATE-TOKEN: $TOKEN" \
    -H "Content-Type: application/json" \
    -d "{\"title\": \"$TITLE\", \"key\": \"$PUBKEY\"}" || warn "SSH key upload may have failed"
  sleep 2
fi

if ! git remote get-url "$GIT_REMOTE_NAME" &>/dev/null; then
  curl -s --fail -X POST "$GITLAB_API/projects" \
    -H "PRIVATE-TOKEN: $TOKEN" \
    -H "Content-Type: application/json" \
    -d "{\"name\": \"$REPO_NAME\", \"visibility\": \"public\"}"
  REMOTE_URL="$GITLAB_SSH:$USERNAME/$REPO_NAME.git"
  git remote add "$GIT_REMOTE_NAME" "$REMOTE_URL"
  info "Remote set to: $REMOTE_URL"
else
  info "Remote already configured: $(git remote get-url "$GIT_REMOTE_NAME")"
fi

# Metadata Block
MARKDOWN_FILE=".gitlab-link.md"
TIMESTAMP=$(date '+%Y-%m-%d %H:%M:%S')
DEFAULT_BRANCH=$(git symbolic-ref --short HEAD)
REPO_PATH=$(pwd)
LATEST_SHA=$(git rev-parse HEAD)
LAST_COMMIT_MSG=$(git log -1 --pretty=format:"%s")
LAST_COMMIT_DATE=$(git log -1 --pretty=format:"%ad")
LAST_COMMIT_AUTHOR=$(git log -1 --pretty=format:"%an <%ae>")
TOTAL_COMMITS=$(git rev-list --count HEAD)
TRACKED_FILES=$(git ls-files | wc -l)
UNCOMMITTED=$(if ! git diff --quiet || ! git diff --cached --quiet; then echo "Yes"; else echo "No"; fi)
LATEST_TAG=$(git describe --tags --abbrev=0 2>/dev/null || echo "None")
HOSTNAME=$(hostname)
CURRENT_USER=$(whoami)
TIMEZONE=$(date +%Z)
OS_NAME=$(uname -s)
KERNEL_VERSION=$(uname -r)
ARCHITECTURE=$(uname -m)
OS_PRETTY_NAME=$(grep PRETTY_NAME /etc/os-release 2>/dev/null | cut -d= -f2 | tr -d '"') || OS_PRETTY_NAME="Unknown"
DOCKER_CHECK=$(grep -qE '/docker|/lxc' /proc/1/cgroup 2>/dev/null && echo "Yes" || echo "No")
WSL_CHECK=$(grep -qi microsoft /proc/version 2>/dev/null && echo "Yes" || echo "No")
VM_CHECK=$(systemd-detect-virt 2>/dev/null || echo "Unknown")
UPTIME=$(uptime -p 2>/dev/null || echo "Unknown")
MAC_ADDR=$(ip link | awk '/ether/ {print $2}' | head -n 1)
LOCAL_IP=$(hostname -I | awk '{print $1}')
CPU_MODEL=$(grep -m1 'model name' /proc/cpuinfo | cut -d: -f2 | sed 's/^ //')
RAM_GB=$(awk '/MemTotal/ {printf "%.2f", $2/1024/1024}' /proc/meminfo)
WEB_LINK="$GITLAB_WEB/$USERNAME/$REPO_NAME"

cat > "$MARKDOWN_FILE" <<EOF
# 🔗 GitLab Repository Link

- **Repo Name**: \`$REPO_NAME\`
- **GitLab User**: \`$USERNAME\`
- **Remote URL**: [$WEB_LINK]($WEB_LINK)
- **Local Repo Path**: \`$REPO_PATH\`
- **Remote Label**: \`$GIT_REMOTE_NAME\`
- **Default Branch**: \`$DEFAULT_BRANCH\`
- **Repo Created**: \`$TIMESTAMP\`

---

## 📦 Commit Info

- **Commit Timestamp**: \`$TIMESTAMP\`
- **Last Commit SHA**: \`$LATEST_SHA\`
- **Commit Message**: \`$LAST_COMMIT_MSG\`
- **Commit Author**: \`$LAST_COMMIT_AUTHOR\`
- **Commit Date**: \`$LAST_COMMIT_DATE\`
- **Commit URL**: [$WEB_LINK/-/commit/$LATEST_SHA]($WEB_LINK/-/commit/$LATEST_SHA)

---

## 📊 Repo Status

- **Total Commits**: \`$TOTAL_COMMITS\`
- **Tracked Files**: \`$TRACKED_FILES\`
- **Uncommitted Changes**: \`$UNCOMMITTED\`
- **Latest Tag**: \`$LATEST_TAG\`

---

## 🧽 Environment

- **Host Machine**: \`$HOSTNAME\`
- **Current User**: \`$CURRENT_USER\`
- **Time Zone**: \`$TIMEZONE\`
- **Script Version**: \`v$SCRIPT_VERSION\`

---

## 🧬 Hardware & OS Fingerprint

- **OS Name**: \`$OS_NAME\`
- **OS Version**: \`$OS_PRETTY_NAME\`
- **Kernel Version**: \`$KERNEL_VERSION\`
- **Architecture**: \`$ARCHITECTURE\`
- **Running in Docker**: \`$DOCKER_CHECK\`
- **Running in WSL**: \`$WSL_CHECK\`
- **Virtual Machine**: \`$VM_CHECK\`
- **System Uptime**: \`$UPTIME\`
- **MAC Address**: \`$MAC_ADDR\`
- **Local IP**: \`$LOCAL_IP\`
- **CPU Model**: \`$CPU_MODEL\`
- **Total RAM (GB)**: \`$RAM_GB\`

---

_Auto-generated by `gitfield-gitlab` push script._
EOF

git add "$MARKDOWN_FILE"
git commit -m "GitLab metadata link commit at $TIMESTAMP" || warn "No changes to commit"

git push -u "$GIT_REMOTE_NAME" "$DEFAULT_BRANCH"
echo -e "\n🔗 View in browser: $WEB_LINK\n"