#!/usr/bin/env bash
set -euo pipefail

ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
WEB_SRC_DIR="$ROOT_DIR/web/src"
MAC_SRC_DIR="${MAC_SRC_DIR:-$ROOT_DIR/mac/src}"
PYTHON_BIN="$ROOT_DIR/.venv/bin/python"
LAUNCHER="$WEB_SRC_DIR/backend_embedded_launcher.py"
BACKEND_BIN_NAME="${BACKEND_BIN_NAME:-WebBackend}"
BUILD_ROOT="$ROOT_DIR/dist-backend-build"
DIST_PATH="$BUILD_ROOT/dist"
WORK_PATH="$BUILD_ROOT/build"
SPEC_PATH="$BUILD_ROOT/spec"
PROJECT_PATH="${MAC_PROJECT_PATH:-}"
SCHEME="${MAC_SCHEME:-}"
TARGET_DIR="${EMBEDDED_BACKEND_DIR:-}"

discover_scheme() {
  local project_path="$1"
  python3 - "$project_path" <<'PY'
import json
import subprocess
import sys

project = sys.argv[1]
try:
    output = subprocess.check_output(
        ["xcodebuild", "-list", "-project", project, "-json"],
        text=True,
        stderr=subprocess.DEVNULL,
    )
    payload = json.loads(output)
except Exception:
    print("")
    raise SystemExit(0)

project_data = payload.get("project", {})
schemes = project_data.get("schemes") or []
print(schemes[0] if schemes else "")
PY
}

if [[ ! -x "$PYTHON_BIN" ]]; then
  echo "Missing virtual environment. Run ./run.sh --setup-only first." >&2
  exit 1
fi

if [[ ! -f "$LAUNCHER" ]]; then
  echo "Missing launcher file: $LAUNCHER" >&2
  exit 1
fi

if [[ -z "$PROJECT_PATH" ]]; then
  PROJECT_PATH="$(find "$MAC_SRC_DIR" -maxdepth 4 -name "*.xcodeproj" | sort | head -n 1)"
fi
if [[ -z "$PROJECT_PATH" ]]; then
  echo "No .xcodeproj found under: $MAC_SRC_DIR" >&2
  echo "Set MAC_PROJECT_PATH to the project you want to build." >&2
  exit 1
fi

PROJECT_DIR="$(dirname "$PROJECT_PATH")"
if [[ -z "$SCHEME" ]]; then
  SCHEME="$(discover_scheme "$PROJECT_PATH")"
fi
if [[ -z "$SCHEME" ]]; then
  SCHEME="$(basename "$PROJECT_PATH" .xcodeproj)"
fi

if [[ -z "$TARGET_DIR" ]]; then
  DEFAULT_TARGET_DIR="$PROJECT_DIR/$SCHEME/EmbeddedBackend"
  if [[ -d "$DEFAULT_TARGET_DIR" ]]; then
    TARGET_DIR="$DEFAULT_TARGET_DIR"
  else
    TARGET_DIR="$(find "$PROJECT_DIR" -maxdepth 4 -type d -name EmbeddedBackend | sort | head -n 1)"
  fi
fi
if [[ -z "$TARGET_DIR" ]]; then
  TARGET_DIR="$PROJECT_DIR/$SCHEME/EmbeddedBackend"
fi

mkdir -p "$DIST_PATH" "$WORK_PATH" "$SPEC_PATH" "$TARGET_DIR"

"$PYTHON_BIN" -m pip install -q pyinstaller

PYI_ARGS=(
  --noconfirm
  --clean
  --onefile
  --name "$BACKEND_BIN_NAME"
  --distpath "$DIST_PATH"
  --workpath "$WORK_PATH"
  --specpath "$SPEC_PATH"
  --add-data "$WEB_SRC_DIR/app.py:."
  --collect-all streamlit
  --collect-all streamlit_autorefresh
  --hidden-import yfinance
  --hidden-import pandas
  --collect-all plotly
  --collect-all kaleido
)

for source_dir in "$WEB_SRC_DIR"/*; do
  source_name="$(basename "$source_dir")"
  if [[ ! -d "$source_dir" ]]; then
    continue
  fi
  if [[ "$source_name" == "tests" ]] || [[ "$source_name" == "__pycache__" ]]; then
    continue
  fi
  PYI_ARGS+=(--add-data "$source_dir:$source_name")
done

if [[ -f "$WEB_SRC_DIR/ONBOARDING.md" ]]; then
  PYI_ARGS+=(--add-data "$WEB_SRC_DIR/ONBOARDING.md:.")
fi

"$PYTHON_BIN" -m PyInstaller "${PYI_ARGS[@]}" "$LAUNCHER"

cp "$DIST_PATH/$BACKEND_BIN_NAME" "$TARGET_DIR/$BACKEND_BIN_NAME"
chmod +x "$TARGET_DIR/$BACKEND_BIN_NAME"

echo "Embedded backend updated: $TARGET_DIR/$BACKEND_BIN_NAME"