#!/usr/bin/env bash
# deploy-by-script-to <target_branch>: run change-to-all-branches (align + deploy test), then checkout target, pull, deploy target.
# Centralized in ia_dev. Requires: start on branch test (after /push-by-script). Target: test | pprod | prod.
set -euo pipefail

if ! git rev-parse --is-inside-work-tree >/dev/null 2>&1; then
	echo "[deploy-by-script-to][ERROR] Not in a git repository" >&2
	exit 1
fi

PROJECT_ROOT="$(git rev-parse --show-toplevel)"
SCRIPT_REAL="$(readlink -f "${BASH_SOURCE[0]:-$0}" 2>/dev/null || realpath "${BASH_SOURCE[0]:-$0}" 2>/dev/null || echo "${BASH_SOURCE[0]:-$0}")"
DEPLOY_IA="$(cd "$(dirname "$SCRIPT_REAL")" && pwd)"
if [[ "$(pwd)" != "$PROJECT_ROOT" ]]; then
	cd "$PROJECT_ROOT" && exec "$SCRIPT_REAL" "$@"
fi

TARGET_BRANCH="${1:-}"
if [[ -z "$TARGET_BRANCH" ]]; then
	echo "[deploy-by-script-to][ERROR] Missing <target_branch> argument (expected: test | pprod | prod)" >&2
	echo "Usage: ./ia_dev/deploy/deploy-by-script-to.sh <target_branch>  (or ./deploy/deploy-by-script-to.sh if deploy wraps ia_dev)" >&2
	exit 1
fi
if [[ ! "$TARGET_BRANCH" =~ ^(test|pprod|prod)$ ]]; then
	echo "[deploy-by-script-to][ERROR] Invalid target branch: must be test, pprod or prod (got: '${TARGET_BRANCH}')" >&2
	echo "Usage: ./ia_dev/deploy/deploy-by-script-to.sh <target_branch>" >&2
	exit 1
fi

current="$(git rev-parse --abbrev-ref HEAD)"
if [[ "$current" != "test" ]]; then
	echo "[deploy-by-script-to][ERROR] Must be on branch 'test' to run change-to-all-branches first (current: '${current}')" >&2
	exit 1
fi

echo "[deploy-by-script-to] Step 1/5: change-to-all-branches (align + deploy test)..."
"$DEPLOY_IA/change-to-all-branches.sh"

echo "[deploy-by-script-to] Step 2/5: checkout ${TARGET_BRANCH}..."
if [[ "$(git rev-parse --abbrev-ref HEAD)" != "$TARGET_BRANCH" ]]; then
	git checkout "$TARGET_BRANCH"
fi

echo "[deploy-by-script-to] Step 3/5: fetch and sync local branch with origin/${TARGET_BRANCH}..."
git fetch origin
if [[ "$TARGET_BRANCH" == "test" ]]; then
	git pull --rebase origin test || {
		echo "[deploy-by-script-to][ERROR] Pull from origin/test failed. Resolve conflicts or run manually." >&2
		exit 1
	}
else
	git reset --hard "origin/${TARGET_BRANCH}"
fi

echo "[deploy-by-script-to] Step 4/5: deploy ${TARGET_BRANCH} (--import-v1 --skipSetupHost)..."
"$PROJECT_ROOT/deploy/scripts_v2/deploy.sh" "$TARGET_BRANCH" --import-v1 --skipSetupHost

echo "[deploy-by-script-to] Step 5/5: checkout test..."
git checkout test

echo "[deploy-by-script-to] OK: aligned, synced, deployed to ${TARGET_BRANCH}, back on test"