#!/usr/bin/env bash

REPO_ROOT="$(git rev-parse --show-toplevel 2>/dev/null || pwd)"
GIT_DIR_PATH="$(git rev-parse --git-dir 2>/dev/null)"
GIT_COMMON_PATH="$(git rev-parse --git-common-dir 2>/dev/null)"

# Linked worktrees get their own runtime state and port range.
if [ -n "$GIT_COMMON_PATH" ] \
  && [ "$GIT_DIR_PATH" != "$GIT_COMMON_PATH" ]; then
  IS_WORKTREE=1
  MAIN_REPO_ROOT="$(cd "$GIT_COMMON_PATH/.." && pwd)"
else
  IS_WORKTREE=0
  MAIN_REPO_ROOT="$REPO_ROOT"
fi

if [ "$IS_WORKTREE" = 1 ]; then
  if [ -n "$PORT_OFFSET" ]; then
    OFFSET="$PORT_OFFSET"
  else
    PORT_HASH="$(printf '%s' "$REPO_ROOT" | cksum | cut -d' ' -f1)"
    OFFSET=$(( (PORT_HASH % 49 + 1) * 100 ))
  fi
else
  OFFSET=0
fi

export CADDY_PORT=$((8000 + OFFSET))
export BACKEND_PORT=$((8001 + OFFSET))
export VITE_PORT=$((5173 + OFFSET))
export MAILPIT_SMTP_PORT=$((2525 + OFFSET))
export MAILPIT_UI_PORT=$((8025 + OFFSET))
export PC_PORT_NUM=$((8080 + OFFSET))

export PGDATA="$REPO_ROOT/.postgres"
export PGHOST="$PGDATA"
export PGUSER="postgres"
export PGDATABASE="postgres"

DEV_APP_URL="https://localhost:$CADDY_PORT"
DEV_FRONTEND_URL="https://localhost:$VITE_PORT"
DEV_DB_CONNECTION="pgsql"
DEV_DB_HOST="$PGHOST"
DEV_DB_PORT="5432"
DEV_DB_DATABASE="$PGDATABASE"
DEV_DB_USERNAME="$PGUSER"
DEV_DB_PASSWORD=""
DEV_MAIL_MAILER="smtp"
DEV_MAIL_HOST="127.0.0.1"
DEV_MAIL_PORT="$MAILPIT_SMTP_PORT"

if [ ! -d "$PGDATA" ]; then
  echo "[pg] initializing cluster at $PGDATA"
  initdb --auth=trust --username="$PGUSER" --no-locale --encoding=UTF8 >/dev/null
  {
    echo "listen_addresses = ''"
    echo "unix_socket_directories = '$PGDATA'"
  } >> "$PGDATA/postgresql.conf"
fi

# Worktrees share host-independent localhost certificates with the main checkout.
MAIN_CERT_ROOT="$MAIN_REPO_ROOT/.cert"
if [ ! -d "$MAIN_CERT_ROOT" ]; then
  echo "[cert] installing local CA + generating TLS certs in $MAIN_CERT_ROOT"
  mkcert -install
  mkdir -p "$MAIN_CERT_ROOT"
  mkcert \
    -key-file "$MAIN_CERT_ROOT/localhost-key.pem" \
    -cert-file "$MAIN_CERT_ROOT/localhost.pem" \
    localhost 127.0.0.1 ::1
fi

if [ "$IS_WORKTREE" = 1 ] \
  && [ ! -e "$REPO_ROOT/.cert" ] \
  && [ ! -L "$REPO_ROOT/.cert" ]; then
  ln -s "$MAIN_CERT_ROOT" "$REPO_ROOT/.cert"
fi

ENV_FILE="$REPO_ROOT/backend/.env"
if [ ! -f "$ENV_FILE" ]; then
  if [ "$IS_WORKTREE" = 1 ] && [ -f "$MAIN_REPO_ROOT/backend/.env" ]; then
    cp "$MAIN_REPO_ROOT/backend/.env" "$ENV_FILE"
  else
    cp "$REPO_ROOT/backend/.env.example" "$ENV_FILE"
  fi
fi

set_env_value() {
  local env_key="$1"
  local env_value="$2"
  local escaped_value

  escaped_value="$(printf '%s' "$env_value" | sed 's/[&|\\]/\\&/g')"

  if grep -q "^${env_key}=" "$ENV_FILE"; then
    sed -i "s|^${env_key}=.*|${env_key}=${escaped_value}|" "$ENV_FILE"
  else
    printf '%s=%s\n' "$env_key" "$env_value" >> "$ENV_FILE"
  fi
}

set_env_value APP_URL "$DEV_APP_URL"
set_env_value FRONTEND_URL "$DEV_FRONTEND_URL"
set_env_value DB_CONNECTION "$DEV_DB_CONNECTION"
set_env_value DB_HOST "$DEV_DB_HOST"
set_env_value DB_PORT "$DEV_DB_PORT"
set_env_value DB_DATABASE "$DEV_DB_DATABASE"
set_env_value DB_USERNAME "$DEV_DB_USERNAME"
set_env_value DB_PASSWORD "$DEV_DB_PASSWORD"
set_env_value MAIL_MAILER "$DEV_MAIL_MAILER"
set_env_value MAIL_HOST "$DEV_MAIL_HOST"
set_env_value MAIL_PORT "$DEV_MAIL_PORT"

FRONTEND_ENV_FILE="$REPO_ROOT/frontend/website/.env.local"
FRONTEND_API_URL="VITE_API_URL=$DEV_APP_URL"
if [ ! -f "$FRONTEND_ENV_FILE" ] \
  || [ "$(cat "$FRONTEND_ENV_FILE")" != "$FRONTEND_API_URL" ]; then
  printf '%s\n' "$FRONTEND_API_URL" > "$FRONTEND_ENV_FILE"
fi

if [ ! -d "$REPO_ROOT/backend/vendor" ]; then
  echo "[composer] installing backend dependencies"
  (cd "$REPO_ROOT/backend" && composer install)
fi

if grep -q '^APP_KEY=$' "$ENV_FILE"; then
  echo "[laravel] generating application key"
  (cd "$REPO_ROOT/backend" && php artisan key:generate)
fi

if [ ! -e "$REPO_ROOT/backend/public/storage" ]; then
  echo "[laravel] linking public storage"
  (cd "$REPO_ROOT/backend" && php artisan storage:link)
fi

echo "[dev] run 'process-compose up' to start:" \
  "postgres + mailpit + backend + caddy + frontend"