#!/usr/bin/env bash
# setup-secrets-repo.sh
# One-shot: creates a private encrypted secrets repo on Gitea using git-crypt.
# Run as root on PD.
set -euo pipefail

# ── CONFIG ────────────────────────────────────────────────────────────────────
GITEA_HTTP_URL="http://10.5.30.6:3000"            # ← local Gitea HTTP port (check TrueNAS app config)
GITEA_SSH_PORT="2222"                             # ← Gitea SSH port
GITEA_USER="fizzlepoof"
GITEA_TOKEN=""  # ← set this before use; regenerate with write:repository + write:user scopes
REPO_NAME="homelab-secrets"
LOCAL_PATH="/mnt/docker-ssd/docker/secrets"
KEY_EXPORT_PATH="/root/.git-crypt-secrets.key"   # back this up somewhere safe!
# ─────────────────────────────────────────────────────────────────────────────

RED='\033[0;31m'; GREEN='\033[0;32m'; YELLOW='\033[1;33m'; NC='\033[0m'
info()    { echo -e "${GREEN}[+]${NC} $*"; }
warn()    { echo -e "${YELLOW}[!]${NC} $*"; }
die()     { echo -e "${RED}[✗]${NC} $*" >&2; exit 1; }

[[ -z "$GITEA_TOKEN" ]] && die "GITEA_TOKEN is not set. Edit the CONFIG section and re-run."

# ── 1. Dependencies ───────────────────────────────────────────────────────────
info "Checking dependencies..."
command -v git  &>/dev/null || die "git is not installed"
command -v curl &>/dev/null || die "curl is not installed"

if ! command -v git-crypt &>/dev/null; then
  info "git-crypt not found — installing via Docker (apt is blocked on TrueNAS)..."
  command -v docker &>/dev/null || die "docker is not installed"
  docker run --rm -v /tmp:/out debian:bookworm-slim \
    bash -c "apt-get update -qq && apt-get install -y -qq git-crypt && cp /usr/bin/git-crypt /out/git-crypt" \
    || die "Docker-based git-crypt install failed"
  mkdir -p /root/bin
  cp /tmp/git-crypt /root/bin/git-crypt
  chmod +x /root/bin/git-crypt
  export PATH="/root/bin:$PATH"
  info "git-crypt installed to /root/bin/git-crypt"
fi

# ── 2. Create private repo on Gitea ──────────────────────────────────────────
info "Creating private repo '${REPO_NAME}' on Gitea..."
HTTP_CODE=$(curl -s -o /tmp/gitea-create.json -w "%{http_code}" \
  -X POST "${GITEA_HTTP_URL}/api/v1/user/repos" \
  -H "Authorization: token ${GITEA_TOKEN}" \
  -H "Content-Type: application/json" \
  -d "{
    \"name\":        \"${REPO_NAME}\",
    \"description\": \"Homelab secrets — git-crypt encrypted\",
    \"private\":     true,
    \"auto_init\":   false
  }")

if [[ "$HTTP_CODE" == "201" ]]; then
  info "Repo created successfully."
elif [[ "$HTTP_CODE" == "409" ]]; then
  warn "Repo already exists on Gitea — continuing."
else
  cat /tmp/gitea-create.json
  die "Gitea API returned HTTP ${HTTP_CODE}. Check token and URL."
fi

REPO_URL="ssh://git@10.5.30.6:${GITEA_SSH_PORT}/${GITEA_USER}/${REPO_NAME}.git"

# ── 3. Init local repo ────────────────────────────────────────────────────────
info "Setting up local repo at ${LOCAL_PATH}..."
mkdir -p "$LOCAL_PATH"
cd "$LOCAL_PATH"

if [[ ! -d .git ]]; then
  git init
  git remote add origin "$REPO_URL"
else
  warn ".git already exists — skipping init."
  git remote set-url origin "$REPO_URL" 2>/dev/null || true
fi

# ── 4. Init git-crypt ─────────────────────────────────────────────────────────
if [[ ! -d .git-crypt ]]; then
  info "Initialising git-crypt..."
  git-crypt init
else
  warn "git-crypt already initialised — skipping."
fi

# ── 5. Export symmetric key ───────────────────────────────────────────────────
info "Exporting symmetric key to ${KEY_EXPORT_PATH}..."
git-crypt export-key "$KEY_EXPORT_PATH"
chmod 600 "$KEY_EXPORT_PATH"
warn "BACK THIS KEY UP. Without it you cannot decrypt the repo on another machine."
warn "  scp root@10.5.30.6:${KEY_EXPORT_PATH} /safe/location/"

# ── 6. .gitattributes — encrypt everything except meta files ─────────────────
info "Writing .gitattributes..."
cat > .gitattributes << 'EOF'
# Encrypt everything by default
* filter=git-crypt diff=git-crypt

# These stay plaintext
.gitattributes !filter !diff
README.md      !filter !diff
EOF

# ── 7. Directory structure ────────────────────────────────────────────────────
info "Creating directory structure..."
mkdir -p env keys certs tokens ssh

cat > README.md << EOF
# homelab-secrets

Private secrets store for the homelab. All files except this README and
.gitattributes are encrypted at rest with git-crypt.

## Unlock on a new machine

\`\`\`bash
git clone ${REPO_URL}
cd ${REPO_NAME}
git-crypt unlock /path/to/.git-crypt-secrets.key
\`\`\`

## Structure

| Directory | Contents |
|-----------|----------|
| \`env/\`   | .env files for each stack |
| \`keys/\`  | API keys and tokens |
| \`certs/\` | TLS certificates |
| \`tokens/\`| Service tokens (Paperless, LiteLLM, etc.) |
| \`ssh/\`   | SSH private keys |

## Key location

The symmetric key is stored at \`${KEY_EXPORT_PATH}\` on PD.
Back it up to a password manager or USB drive.
EOF

# Placeholder files so dirs aren't empty
for dir in env keys certs tokens ssh; do
  touch "${dir}/.gitkeep"
done

# ── 8. Initial commit and push ────────────────────────────────────────────────
info "Committing and pushing..."
git add -A
git -c user.name="Fizzlepoof" -c user.email="admin@paccoco.com" \
  commit -m "chore: init encrypted secrets repo"

git push -u origin main 2>/dev/null || git push -u origin master 2>/dev/null || \
  die "Push failed. Check that Gitea credentials are configured (git credential store)."

echo ""
echo -e "${GREEN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo -e "${GREEN}  Done!${NC}"
echo -e "${GREEN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo ""
echo "  Repo:  ${REPO_URL}"
echo "  Local: ${LOCAL_PATH}"
echo "  Key:   ${KEY_EXPORT_PATH}"
echo ""
echo -e "${YELLOW}  Next: back up the key, then start dropping .env files into ${LOCAL_PATH}/env/${NC}"
echo ""