#!/usr/bin/env python3
"""
Generate BIP85 test vectors for vectors.json

Run this from the repo root:
    python3 tests/generate_bip85_vectors.py
"""

import sys
from pathlib import Path

# Add src to path
sys.path.insert(0, str(Path(__file__).parent.parent / "src"))

import pyhdwallet
from bip_utils import Bip39SeedGenerator
import json

# Test cases to generate
test_cases = [
    {
        "description": "BIP85 test case 1: 12-word child, no passphrase",
        "master_mnemonic": "abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about",
        "master_passphrase": "",
        "child_words": 12,
        "index": 0,
    },
    {
        "description": "BIP85 test case 2: 18-word child, no passphrase",
        "master_mnemonic": "abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about",
        "master_passphrase": "",
        "child_words": 18,
        "index": 0,
    },
    {
        "description": "BIP85 test case 3: 24-word child, no passphrase",
        "master_mnemonic": "abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about",
        "master_passphrase": "",
        "child_words": 24,
        "index": 0,
    },
    {
        "description": "BIP85 test case 4: 12-word child, WITH passphrase",
        "master_mnemonic": "abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about",
        "master_passphrase": "TREZOR",
        "child_words": 12,
        "index": 0,
    },
]

print("Generating BIP85 test vectors...\n")
print("=" * 80)

vectors = []

for case in test_cases:
    print(f"\n{case['description']}")
    print("-" * 80)
    
    # Generate master seed
    master_seed = Bip39SeedGenerator(case["master_mnemonic"]).Generate(case["master_passphrase"])
    
    # Derive child using BIP85
    path, child_mnemonic, entropy64, truncated_entropy = pyhdwallet.bip85_derive_child_mnemonic(
        master_seed,
        case["child_words"],
        case["index"]
    )
    
    vector = {
        "description": case["description"],
        "master_mnemonic": case["master_mnemonic"],
        "master_passphrase": case["master_passphrase"],
        "child_words": case["child_words"],
        "index": case["index"],
        "bip85_path": path,
        "expected_entropy64_hex": entropy64.hex(),
        "expected_entropy_truncated_hex": truncated_entropy.hex(),
        "expected_child_mnemonic": child_mnemonic,
    }
    
    vectors.append(vector)
    
    print(f"Path: {path}")
    print(f"Entropy64: {entropy64.hex()}")
    print(f"Truncated: {truncated_entropy.hex()}")
    print(f"Child mnemonic: {child_mnemonic}")

print("\n" + "=" * 80)
print("\nJSON output for vectors.json:\n")
print(json.dumps(vectors, indent=2))