#!/bin/sh
set -eu

# deploy — sync built artifacts and/or hand-edited content to the live site.
#
# The build pipeline (`./build alpha|beta|release`) produces self-contained
# bundles in dist/release-output/ but does NOT touch the live site. This
# script is the explicit deploy step. Two sync paths, independent:
#
#   ./deploy                  push everything: content + releases
#   ./deploy --content        push only ~/src/zddc-website/ → /srv/zddc/
#                             (excludes /releases/ so releases stay intact)
#   ./deploy --releases       push only dist/release-output/ → /srv/zddc/releases/
#
# Both paths use rsync with --delete-after, so the live tree exactly
# mirrors the source — files removed locally go away on the live site.
# Mostly-atomic per-file; brief mixed-state during a sync is acceptable
# for a low-traffic static site. Caddy bind-mounts /srv/zddc as :ro and
# serves whatever is there at request time.
#
# Override the source paths via env if you want:
#   ZDDC_CONTENT_DIR             default: ~/src/zddc-website
#   ZDDC_DEPLOY_RELEASES_DIR     default: <this-script-dir>/dist/release-output
#   ZDDC_LIVE_DIR                default: /srv/zddc

SCRIPT_DIR=$(cd "$(dirname "$0")" && pwd)
CONTENT_SRC="${ZDDC_CONTENT_DIR:-$HOME/src/zddc-website}"
RELEASES_SRC="${ZDDC_DEPLOY_RELEASES_DIR:-$SCRIPT_DIR/dist/release-output}"
LIVE="${ZDDC_LIVE_DIR:-/srv/zddc}"

case "${1:-all}" in
    -h|--help|help)
        sed -n '4,21p' "$0" | sed 's/^# \{0,1\}//'
        exit 0
        ;;
    --content|content)
        WHAT=content
        ;;
    --releases|releases)
        WHAT=releases
        ;;
    all|"")
        WHAT=all
        ;;
    *)
        echo "deploy: unknown subcommand '$1'. Try './deploy help'." >&2
        exit 1
        ;;
esac

if [ ! -d "$LIVE" ]; then
    echo "deploy: $LIVE does not exist. Create it and chown to your user first:" >&2
    echo "  sudo mkdir -p $LIVE && sudo chown -R \$USER:\$USER $LIVE" >&2
    exit 1
fi

if [ "$WHAT" = content ] || [ "$WHAT" = all ]; then
    if [ ! -d "$CONTENT_SRC" ]; then
        echo "deploy: content source $CONTENT_SRC does not exist" >&2
        exit 1
    fi
    echo "=== Syncing content: $CONTENT_SRC/ → $LIVE/ ==="
    # --exclude=/releases/ keeps the live site's releases dir untouched
    # by content syncs. --exclude=.git so the .git dir doesn't end up
    # under /usr/share/caddy.
    rsync -av --delete-after \
        --exclude='/releases/' \
        --exclude='/.git*' \
        --exclude='/README.md' \
        --exclude='/LICENSE' \
        "$CONTENT_SRC/" "$LIVE/"
fi

if [ "$WHAT" = releases ] || [ "$WHAT" = all ]; then
    if [ ! -d "$RELEASES_SRC" ] || [ -z "$(ls -A "$RELEASES_SRC" 2>/dev/null)" ]; then
        echo "deploy: releases source $RELEASES_SRC is empty or missing" >&2
        echo "  Run ./build alpha|beta|release first to populate it." >&2
        if [ "$WHAT" = all ]; then
            echo "  (Skipping releases sync; content was synced.)" >&2
            exit 0
        fi
        exit 1
    fi
    mkdir -p "$LIVE/releases"
    echo "=== Syncing releases: $RELEASES_SRC/ → $LIVE/releases/ ==="
    rsync -av --delete-after "$RELEASES_SRC/" "$LIVE/releases/"
fi

echo ""
echo "=== Deploy done ==="
echo "Live: https://zddc.varasys.io/"