"""Symbol resolver self-check (pure lookup, no auto logic).

Run: python tests/test_symbol_resolver.py
"""

import os
import sys

HERE = os.path.dirname(os.path.abspath(__file__))
sys.path.insert(0, os.path.normpath(os.path.join(HERE, "..", "scripts")))

from symbol_resolver import resolve_symbol


def _bt(aliases=None):
    return {"symbol_aliases": aliases or {}}


def expect(label, got, want):
    ok = got == want
    print(f"  {'PASS' if ok else 'FAIL'}  {label}: got={got!r} want={want!r}")
    if not ok:
        raise AssertionError(label)


def main():
    print("[1] has alias -> use alias")
    expect("XAUUSD -> XAUUSDc", resolve_symbol("XAUUSD", _bt({"XAUUSD": "XAUUSDc"})), "XAUUSDc")

    print("[2] has alias for another symbol -> that one passes through")
    expect("EURUSD no alias", resolve_symbol("EURUSD", _bt({"XAUUSD": "XAUUSDc"})), "EURUSD")

    print("[3] no aliases config -> bare (back-compat)")
    expect("no config", resolve_symbol("XAUUSD", _bt()), "XAUUSD")

    print("[4] alias value can be any string (suffix, full name, even identical)")
    expect("alias = c suffix", resolve_symbol("XAUUSD", _bt({"XAUUSD": "c"})), "c")

    print("[5] empty symbol -> empty")
    expect("empty", resolve_symbol("", _bt({"": "XAUUSDc"})), "")

    print("[6] aliases value None -> bare")
    expect("None value", resolve_symbol("XAUUSD", _bt({"XAUUSD": None})), "XAUUSD")

    print("[7] symbol_aliases missing key entirely -> bare")
    expect("missing key", resolve_symbol("XAUUSD", {"date_range": {"from": "2020.01.01", "to": "2024.01.01"}}), "XAUUSD")

    print("[8] long date span does NOT auto-switch (explicit override only)")
    expect("long span no alias", resolve_symbol("XAUUSD", {"date_range": {"from": "2010.01.01", "to": "2024.01.01"}}), "XAUUSD")

    print("[9] explicit alias always wins regardless of date/optimization context")
    ctx = {"date_range": {"from": "2010.01.01", "to": "2024.01.01"},
           "optimization": 1, "symbol_aliases": {"XAUUSD": "XAUUSDm"}}
    expect("explicit + opt", resolve_symbol("XAUUSD", ctx), "XAUUSDm")

    print("\nAll symbol resolver checks passed.")


if __name__ == "__main__":
    main()