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

# ╭─────────────────────────────────────╮
# │          CONFIGURATION              │
# ╰─────────────────────────────────────╯
BITBUCKET_USER="mrhavens"
BITBUCKET_WORKSPACE="thefoldwithin"
REMOTE_NAME="bitbucket"
REPO_NAME=$(basename "$(pwd)")
EMAIL="mark.r.havens@gmail.com"
FULL_NAME="Mark Randall Havens"
APP_PASS_FILE="$HOME/.bitbucket_app_password"
API_URL="https://api.bitbucket.org/2.0/repositories/$BITBUCKET_WORKSPACE/$REPO_NAME"
SSH_REMOTE="git@bitbucket.org:$BITBUCKET_WORKSPACE/$REPO_NAME.git"
WEB_LINK="https://bitbucket.org/$BITBUCKET_WORKSPACE/$REPO_NAME"

# ╭─────────────────────────────────────╮
# │           LOGGING UTILS             │
# ╰─────────────────────────────────────╯
info()  { echo -e "\n\e[1;34m[INFO]\e[0m $*"; }
warn()  { echo -e "\n\e[1;33m[WARN]\e[0m $*"; }
error() { echo -e "\n\e[1;31m[ERROR]\e[0m $*" >&2; exit 1; }

# ╭─────────────────────────────────────╮
# │       CHECK + INSTALL TOOLS         │
# ╰─────────────────────────────────────╯
info "Checking prerequisites..."
sudo apt update -qq
sudo apt install -y git curl jq openssh-client || error "Dependency install failed"

# ╭─────────────────────────────────────╮
# │        GIT IDENTITY SETUP           │
# ╰─────────────────────────────────────╯
git config --global user.name "$FULL_NAME"
git config --global user.email "$EMAIL"
info "Git identity: $FULL_NAME <$EMAIL>"

# ╭─────────────────────────────────────╮
# │        SSH KEYGEN + AGENT           │
# ╰─────────────────────────────────────╯
if [ ! -f ~/.ssh/id_rsa ]; then
  info "Generating new SSH key..."
  ssh-keygen -t rsa -b 4096 -C "$EMAIL" -f ~/.ssh/id_rsa -N ""
fi

eval "$(ssh-agent -s)"
ssh-add ~/.ssh/id_rsa || error "Failed to add SSH key"
ssh-keyscan -t rsa bitbucket.org >> ~/.ssh/known_hosts 2>/dev/null || true

# ╭─────────────────────────────────────╮
# │        SSH AUTH VERIFICATION        │
# ╰─────────────────────────────────────╯
info "Verifying SSH access to Bitbucket..."
if ssh -T git@bitbucket.org 2>&1 | grep -q "authenticated"; then
  info "✓ SSH access to Bitbucket verified."
else
  warn "❌ SSH key not authorized with Bitbucket."
  echo "→ Visit: https://bitbucket.org/account/settings/ssh-keys/"
  echo "→ Paste this key:"
  echo
  cat ~/.ssh/id_rsa.pub
  echo
  exit 1
fi

# ╭─────────────────────────────────────╮
# │     BITBUCKET APP PASSWORD SETUP    │
# ╰─────────────────────────────────────╯
if [ ! -f "$APP_PASS_FILE" ]; then
  echo
  echo "🔐 Create a Bitbucket App Password (repo:admin + write + webhook)"
  echo "→ https://bitbucket.org/account/settings/app-passwords/"
  read -rsp "Enter Bitbucket App Password (input hidden): " APP_PASS
  echo "$APP_PASS" > "$APP_PASS_FILE"
  chmod 600 "$APP_PASS_FILE"
  echo
  info "App password saved at $APP_PASS_FILE"
fi

APP_PASS=$(<"$APP_PASS_FILE")

# ╭─────────────────────────────────────╮
# │         GIT INIT & COMMIT           │
# ╰─────────────────────────────────────╯
if [ ! -d .git ]; then
  info "Initializing Git repository..."
  git init
  git add . || warn "Nothing to add"
  git commit -m "Initial commit" || warn "Nothing to commit"
else
  info "✓ Git repo already initialized."
fi

# ╭─────────────────────────────────────╮
# │     CREATE REMOTE IF NOT EXISTS     │
# ╰─────────────────────────────────────╯
REPO_EXISTS=$(curl -s -u "$BITBUCKET_USER:$APP_PASS" "$API_URL" | jq -r '.name // empty')
if [ -z "$REPO_EXISTS" ]; then
  info "Creating Bitbucket repository '$REPO_NAME'..."
  CREATE_RESPONSE=$(curl -s -w "%{http_code}" -o /tmp/create_resp.txt -u "$BITBUCKET_USER:$APP_PASS" -X POST "$API_URL" \
    -H "Content-Type: application/json" \
    -d "{\"scm\": \"git\", \"is_private\": false}")
  if [[ "$CREATE_RESPONSE" != "200" && "$CREATE_RESPONSE" != "201" ]]; then
    cat /tmp/create_resp.txt
    error "Failed to create repository (HTTP $CREATE_RESPONSE)"
  fi
  info "✓ Repository created."
else
  info "✓ Remote Bitbucket repo already exists."
fi

# ╭─────────────────────────────────────╮
# │      REMOTE VALIDATION + SETUP      │
# ╰─────────────────────────────────────╯
EXPECTED_REMOTE="$SSH_REMOTE"
CURRENT_REMOTE=$(git remote get-url "$REMOTE_NAME" 2>/dev/null || echo "")
if [[ "$CURRENT_REMOTE" != "$EXPECTED_REMOTE" ]]; then
  if [ -n "$CURRENT_REMOTE" ]; then
    warn "Removing incorrect remote: $CURRENT_REMOTE"
    git remote remove "$REMOTE_NAME"
  fi
  info "Setting correct Bitbucket remote: $EXPECTED_REMOTE"
  git remote add "$REMOTE_NAME" "$EXPECTED_REMOTE"
else
  info "✓ Remote already correctly set to: $EXPECTED_REMOTE"
fi

# ╭─────────────────────────────────────╮
# │          COMMIT + PUSH LOGIC        │
# ╰─────────────────────────────────────╯
BRANCH=$(git rev-parse --abbrev-ref HEAD)
if ! git diff --quiet || ! git diff --cached --quiet; then
  git add . && git commit -m "Update: $(date '+%Y-%m-%d %H:%M:%S')" || warn "Nothing to commit"
else
  info "No uncommitted changes."
fi

if ! git config --get branch."$BRANCH".remote &>/dev/null; then
  info "Pushing with upstream..."
  git push -u "$REMOTE_NAME" "$BRANCH" || error "Push failed"
else
  info "Pushing to $REMOTE_NAME/$BRANCH..."
  git push "$REMOTE_NAME" "$BRANCH" || error "Push failed"
fi

# ╭─────────────────────────────────────╮
# │          FINAL LINK OUTPUT          │
# ╰─────────────────────────────────────╯
info "✅ Bitbucket push complete."
# ╭─────────────────────────────────────╮
# │   WRITE BITBUCKET-SPECIFIC MARKDOWN │
# ╰─────────────────────────────────────╯
MARKDOWN_FILE=".bitbucket-link.md"
info "Creating Bitbucket markdown reference: $MARKDOWN_FILE"

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

- **Repo Name**: \`$REPO_NAME\`  
- **Bitbucket Workspace**: \`$BITBUCKET_WORKSPACE\`  
- **Remote URL**: [$WEB_LINK]($WEB_LINK)  
- **Commit Timestamp**: \`$(date '+%Y-%m-%d %H:%M:%S')\`

_Auto-generated by \`gitfield-bitbucket\` push script._
EOF

git add "$MARKDOWN_FILE"
git commit -m "Add/update Bitbucket repo link metadata" || warn "No changes to commit for $MARKDOWN_FILE"

echo -e "\n🔗 View in browser: $WEB_LINK\n"