#!/usr/bin/env python3
"""
Render dog(cat) - apply dog effect to cat image.

Records full provenance: inputs, effects, software, hardware, owner.
"""

import hashlib
import json
import shutil
import sys
from datetime import datetime, timezone
from pathlib import Path

# Add effect to path
sys.path.insert(0, str(Path(__file__).parent.parent / "artdag-effects" / "dog"))

from effect import effect_dog, DOG_HASH


def file_hash(path: Path) -> str:
    """Compute SHA3-256 hash of a file."""
    hasher = hashlib.sha3_256()
    actual_path = path.resolve() if path.is_symlink() else path
    with open(actual_path, "rb") as f:
        for chunk in iter(lambda: f.read(65536), b""):
            hasher.update(chunk)
    return hasher.hexdigest()


def main():
    # Registry hashes
    CAT_HASH = "33268b6e167deaf018cc538de12dbe562612b33e89a749391cef855b320a269b"
    DOG_EFFECT_HASH = "d048fe313433eb4e38f0e24194ffae91b896ca3e6eed3e50b2cc37b7be495555"
    ARTDAG_HASH = "96a5972de216aee12ec794dcad5f9360da2e676171eabf24a46dfe1ee5fee4b0"
    WORKSTATION_HASH = "964bf6e69dc4e2493f42375013caffe26404ec3cf8eb5d9bc170cd42a361523b"

    # Input (cat)
    cat_path = Path.home() / "artdag-art" / "cat.jpg"
    output_dir = Path.home() / "artdag-art"
    output_path = output_dir / "dog-from-cat.mkv"

    print("=== Rendering dog(cat) ===\n")

    # Verify input
    input_hash = file_hash(cat_path)
    print(f"Input: {cat_path}")
    print(f"Input hash: {input_hash}")
    assert input_hash == CAT_HASH, f"Input hash mismatch! Expected {CAT_HASH}"

    # Apply dog effect
    print(f"\nApplying dog effect...")
    result = effect_dog(cat_path, output_path, {})

    # Verify output
    output_hash = file_hash(result)
    print(f"\nOutput: {result}")
    print(f"Output hash: {output_hash}")
    assert output_hash == DOG_HASH, f"Output hash mismatch! Expected {DOG_HASH}"

    print(f"\n✓ dog(cat) = dog.mkv")
    print(f"  Cat went in, dog came out!")

    # Record provenance
    provenance = {
        "minted_at": datetime.now(timezone.utc).isoformat(),
        "minted_by": "@giles@artdag.rose-ash.com",
        "output": {
            "name": "dog-from-cat",
            "content_hash": output_hash,
            "local_path": str(result),
            "url": None,  # To be filled after push
        },
        "inputs": [
            {"name": "cat", "content_hash": CAT_HASH}
        ],
        "recipe": {
            "name": "dog-cat",
            "description": "Apply dog effect to cat"
        },
        "effects": [
            {"name": "effect:dog", "content_hash": DOG_EFFECT_HASH}
        ],
        "infrastructure": {
            "software": {"name": "infra:artdag", "content_hash": ARTDAG_HASH},
            "hardware": {"name": "infra:giles-hp", "content_hash": WORKSTATION_HASH}
        }
    }

    # Save provenance
    provenance_path = result.with_suffix(".provenance.json")
    with open(provenance_path, "w") as f:
        json.dump(provenance, f, indent=2)

    print(f"\nProvenance saved: {provenance_path}")

    return provenance


if __name__ == "__main__":
    main()