#!/usr/bin/env bash
# =============================================================================
# push-to-gitea.sh — Push current branch to Gitea (Tailscale Funnel)
#
# Usage:
#   bash scripts/push-to-gitea.sh [BRANCH]
#
# BRANCH defaults to the current checked-out branch.
#
# Gitea base URL is resolved from (in order):
#   1. GITEA_URL env var
#   2. GITEA_URL in .env.local
#   3. Hard-coded Tailscale Funnel fallback
#
# Token is resolved from (in order):
#   1. GITEA_TOKEN env var
#   2. .gitea-credentials file in repo root (gitignored, one line: the token)
# =============================================================================
set -euo pipefail

GITEA_USER="${GITEA_USER:-replit}"
REPO_ROOT="$(git rev-parse --show-toplevel 2>/dev/null || pwd)"

RED='\033[0;31m'; GREEN='\033[0;32m'; YELLOW='\033[1;33m'; CYAN='\033[0;36m'; NC='\033[0m'
info() { echo -e "${CYAN}[gitea]${NC} $*"; }
ok()   { echo -e "${GREEN}[ok]${NC}    $*"; }
warn() { echo -e "${YELLOW}[warn]${NC}  $*"; }
die()  { echo -e "${RED}[error]${NC} $*" >&2; exit 1; }

# ─── 1. Resolve Gitea base URL ───────────────────────────────────────────────

GITEA_BASE="${GITEA_URL:-}"

if [[ -z "$GITEA_BASE" && -f "$REPO_ROOT/.env.local" ]]; then
  GITEA_BASE="$(grep '^GITEA_URL=' "$REPO_ROOT/.env.local" | cut -d= -f2- | tr -d '[:space:]')"
fi

# Fallback: Tailscale Funnel (permanent, no port changes)
GITEA_BASE="${GITEA_BASE:-https://mm.tailb74b2d.ts.net}"

# Strip trailing slash
GITEA_BASE="${GITEA_BASE%/}"

# ─── 2. Load token ───────────────────────────────────────────────────────────

CREDS_FILE="$REPO_ROOT/.gitea-credentials"

if [[ -z "${GITEA_TOKEN:-}" && -f "$CREDS_FILE" ]]; then
  GITEA_TOKEN="$(tr -d '[:space:]' < "$CREDS_FILE")"
fi

if [[ -z "${GITEA_TOKEN:-}" ]]; then
  die "GITEA_TOKEN is not set.

  Set it in one of two ways:
    a) Export in your shell:
         export GITEA_TOKEN=<your-token>
    b) Save to .gitea-credentials:
         echo <your-token> > .gitea-credentials

  Get your token from: ${GITEA_BASE}/user/settings/applications"
fi

# ─── 3. Verify Gitea is reachable ────────────────────────────────────────────

info "Checking Gitea at ${GITEA_BASE} …"

if ! curl -sf --max-time 8 "${GITEA_BASE}/api/v1/version" -o /dev/null 2>/dev/null; then
  die "Gitea is not reachable at ${GITEA_BASE}.

  Check that your Tailscale Funnel is running:
    tailscale funnel status
    tailscale funnel 3000   # to start it"
fi

ok "Gitea reachable at ${GITEA_BASE}"

# ─── 4. Detect repo and branch ───────────────────────────────────────────────

EXISTING_REMOTE="$(git -C "$REPO_ROOT" remote get-url gitea 2>/dev/null || true)"
if [[ "$EXISTING_REMOTE" =~ /([^/]+)\.git$ ]]; then
  REPO_NAME="${BASH_REMATCH[1]}"
else
  REPO_NAME="$(basename "$REPO_ROOT")"
fi

BRANCH="${1:-$(git -C "$REPO_ROOT" rev-parse --abbrev-ref HEAD)}"

if [[ "$BRANCH" == "HEAD" ]]; then
  die "Detached HEAD state — check out a branch before pushing."
fi

info "Repo:   ${REPO_NAME}"
info "Branch: ${BRANCH}"

# ─── 5. Update (or add) the gitea remote ─────────────────────────────────────

REMOTE_URL_WITH_CREDS="${GITEA_BASE/https:\/\//https://${GITEA_USER}:${GITEA_TOKEN}@}/${GITEA_USER}/${REPO_NAME}.git"

if git -C "$REPO_ROOT" remote get-url gitea &>/dev/null; then
  git -C "$REPO_ROOT" remote set-url gitea "$REMOTE_URL_WITH_CREDS"
else
  git -C "$REPO_ROOT" remote add gitea "$REMOTE_URL_WITH_CREDS"
  info "Added 'gitea' remote."
fi

# ─── 6. Push ─────────────────────────────────────────────────────────────────

info "Pushing ${BRANCH} → gitea …"
echo ""

if git -C "$REPO_ROOT" push gitea "HEAD:${BRANCH}"; then
  echo ""
  ok "Pushed ${BRANCH} to gitea."
  echo ""
  echo "  Branch:  ${GITEA_BASE}/${GITEA_USER}/${REPO_NAME}/src/branch/${BRANCH}"
  echo "  Open PR: ${GITEA_BASE}/${GITEA_USER}/${REPO_NAME}/compare/main...${BRANCH}"
  echo ""
else
  EXIT_CODE=$?
  echo ""
  die "git push failed (exit ${EXIT_CODE}). See error above."
fi