import json
import os
import tempfile

import pytest

from ipin_vr.export import generate_bank, run_export

# Rozmiary wyczerpujące przestrzeni:
#   Poziom 1: 2 × 10 × 6     = 120
#   Poziom 2: 2 × 10 × 6 × 6 = 720


# --- format JSON ---

def test_meta_fields():
    bank = generate_bank(per_level=5, seed=0)
    assert bank["meta"]["version"] == "1"
    assert bank["meta"]["per_level"] == 5


def test_commands_structure():
    bank = generate_bank(per_level=5, seed=0)
    for cmd in bank["commands"]:
        assert "level" in cmd
        assert "text" in cmd
        assert cmd["level"] in {1, 2, 3}
        assert isinstance(cmd["text"], str)
        assert len(cmd["text"]) > 0


def test_commands_end_with_period():
    bank = generate_bank(per_level=5, seed=0)
    for cmd in bank["commands"]:
        assert cmd["text"].endswith("."), f"Brak kropki: {cmd['text']!r}"


def test_json_roundtrip():
    bank = generate_bank(per_level=5, seed=0)
    dumped = json.dumps(bank, ensure_ascii=False)
    reloaded = json.loads(dumped)
    assert reloaded["meta"] == bank["meta"]
    assert reloaded["commands"] == bank["commands"]


# --- deduplikacja w obrębie poziomu ---

def test_dedup_level1():
    bank = generate_bank(per_level=50, seed=1)
    texts = [c["text"] for c in bank["commands"] if c["level"] == 1]
    assert len(texts) == len(set(texts)), "Duplikaty w poziomie 1"


def test_dedup_level2():
    bank = generate_bank(per_level=50, seed=1)
    texts = [c["text"] for c in bank["commands"] if c["level"] == 2]
    assert len(texts) == len(set(texts)), "Duplikaty w poziomie 2"


def test_dedup_level3():
    bank = generate_bank(per_level=50, seed=1)
    texts = [c["text"] for c in bank["commands"] if c["level"] == 3]
    assert len(texts) == len(set(texts)), "Duplikaty w poziomie 3"


# --- ograniczenie przez rozmiar przestrzeni ---

def test_level1_capped_at_space():
    """Poziom 1: 2 × 10 × 6 = 120 unikatów — więcej nie istnieje."""
    bank = generate_bank(per_level=300, seed=2)
    texts = [c["text"] for c in bank["commands"] if c["level"] == 1]
    assert len(texts) == 120
    assert len(texts) == len(set(texts))


def test_level2_capped_at_space():
    """Poziom 2: 2 × 10 × 6 × 6 = 720 unikatów."""
    bank = generate_bank(per_level=1000, seed=2)
    texts = [c["text"] for c in bank["commands"] if c["level"] == 2]
    assert len(texts) == 720
    assert len(texts) == len(set(texts))


def test_level3_respects_per_level():
    bank = generate_bank(per_level=30, seed=3)
    texts = [c["text"] for c in bank["commands"] if c["level"] == 3]
    assert len(texts) == 30


# --- dokładna liczba na poziom ---

def test_counts_per_level_small():
    bank = generate_bank(per_level=10, seed=4)
    for level in [1, 2, 3]:
        texts = [c["text"] for c in bank["commands"] if c["level"] == level]
        assert len(texts) == 10, f"Poziom {level}: oczekiwano 10, jest {len(texts)}"


# --- flagi CLI ---

def test_cli_out_file():
    with tempfile.NamedTemporaryFile(suffix=".json", delete=False) as tf:
        path = tf.name
    try:
        run_export(["--per-level", "5", "--out", path, "--seed", "7"])
        with open(path, encoding="utf-8") as f:
            data = json.load(f)
        assert data["meta"]["per_level"] == 5
        assert len(data["commands"]) == 15  # 5 per level × 3 levels
    finally:
        os.unlink(path)


def test_cli_seed_deterministic():
    """Ten sam seed → identyczny wynik."""
    b1 = generate_bank(per_level=10, seed=99)
    b2 = generate_bank(per_level=10, seed=99)
    assert b1["commands"] == b2["commands"]


def test_cli_different_seeds():
    """Różne seedy → różne wyniki (z bardzo dużym prawdopodobieństwem)."""
    b1 = generate_bank(per_level=50, seed=1)
    b2 = generate_bank(per_level=50, seed=2)
    t1 = [c["text"] for c in b1["commands"] if c["level"] == 3]
    t2 = [c["text"] for c in b2["commands"] if c["level"] == 3]
    assert t1 != t2