#!/usr/bin/env bash

set -euo pipefail

ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
source "$ROOT_DIR/scripts/harness/lib.sh"

main() {
  cd "$ROOT_DIR"
  local uv_bin
  uv_bin="$(harness_require_tool uv)"

  harness_run "$uv_bin" run --frozen --project "$ROOT_DIR" python - <<'PY'
import ast
from pathlib import Path

root = Path.cwd()
failures: list[str] = []


def fail(message: str) -> None:
    failures.append(message)


class BackendDebugCallVisitor(ast.NodeVisitor):
    def __init__(self, path: Path) -> None:
        self.path = path

    def visit_Call(self, node: ast.Call) -> None:
        if isinstance(node.func, ast.Name) and node.func.id in {"print", "breakpoint"}:
            fail(f"{self.path}:{node.lineno}: backend app code must use structured logging, not {node.func.id}()")
        if (
            isinstance(node.func, ast.Attribute)
            and node.func.attr == "set_trace"
            and isinstance(node.func.value, ast.Name)
            and node.func.value.id == "pdb"
        ):
            fail(f"{self.path}:{node.lineno}: remove pdb.set_trace() from backend app code")
        self.generic_visit(node)


for path in sorted((root / "backend/app").rglob("*.py")):
    rel = path.relative_to(root)
    try:
        tree = ast.parse(path.read_text(encoding="utf-8"), filename=str(rel))
    except SyntaxError as exc:
        fail(f"{rel}:{exc.lineno}: Python syntax error: {exc.msg}")
        continue
    BackendDebugCallVisitor(rel).visit(tree)

if failures:
    for message in failures:
        print(f"fail: {message}")
    raise SystemExit(f"backend rules check failed: {len(failures)} failure(s)")

print("backend rules check passed")
PY
}

main "$@"