#!/usr/bin/env python3
"""Generate deterministic Blender 5.2 sequencer, physics, and I/O inventories."""

import hashlib
import json
import pathlib
import re
import sys

import bpy


def text(value):
    return value.decode("utf-8", errors="replace") if isinstance(value, bytes) else str(value)


def sha256_file(path):
    digest = hashlib.sha256()
    with open(path, "rb") as handle:
        for chunk in iter(lambda: handle.read(1024 * 1024), b""):
            digest.update(chunk)
    return digest.hexdigest()


def property_info(prop):
    result = {"identifier": prop.identifier, "type": prop.type, "readOnly": bool(prop.is_readonly)}
    if hasattr(prop, "array_length"):
        result["arrayLength"] = prop.array_length
    return result


def enum_item_info(item):
    return {"identifier": item.identifier, "name": text(item.name), "description": text(item.description), "value": item.value}


def enum_inventory(rna_type, property_name):
    entries = [enum_item_info(item) for item in rna_type.bl_rna.properties[property_name].enum_items]
    entries.sort(key=lambda item: item["identifier"])
    return entries


def class_properties(rna):
    entries = [property_info(prop) for prop in rna.properties if prop.identifier != "rna_type"]
    entries.sort(key=lambda prop: prop["identifier"])
    return entries


def physics_inventory():
    marker = re.compile(r"(Particle|Boid|Cloth|SoftBody|RigidBody|Fluid|DynamicPaint|Effector|Collision|Field|PointCache|BakeSettings)")
    entries = []
    for class_name in sorted(name for name in dir(bpy.types) if not name.startswith("_")):
        cls = getattr(bpy.types, class_name)
        if not isinstance(cls, type) or not marker.search(class_name) or re.match(r"[A-Z0-9]+_(?:PT|OT|MT|UL)_", class_name):
            continue
        rna = getattr(cls, "bl_rna", None)
        if not rna or class_name.endswith("Node"):
            continue
        entries.append({"className": class_name, "rnaIdentifier": text(rna.identifier), "properties": class_properties(rna)})
    entries.sort(key=lambda entry: (entry["rnaIdentifier"], entry["className"]))
    return entries


def operator_inventory():
    entries = []
    for module_name in sorted(name for name in dir(bpy.ops) if not name.startswith("_")):
        module = getattr(bpy.ops, module_name)
        for operator_name in sorted(name for name in dir(module) if not name.startswith("_")):
            operator_path = f"{module_name}.{operator_name}"
            if not re.search(r"(?:import|export)", operator_path, re.IGNORECASE):
                continue
            try:
                operator = getattr(module, operator_name)
                rna = operator.get_rna_type()
                properties = class_properties(rna)
                try:
                    poll = bool(operator.poll())
                    poll_error = None
                except (AttributeError, RuntimeError) as error:
                    poll = None
                    poll_error = type(error).__name__
                entries.append({"operator": operator_path, "rnaIdentifier": text(rna.identifier), "poll": poll, "pollError": poll_error, "properties": properties})
            except (AttributeError, KeyError, RuntimeError):
                continue
    entries.sort(key=lambda entry: entry["operator"])
    return entries


def main():
    if "--" not in sys.argv or len(sys.argv[sys.argv.index("--") + 1:]) != 1:
        raise SystemExit("usage: blender --background --factory-startup --python generate-blender-format-inventory.py -- OUTPUT.json")
    output = pathlib.Path(sys.argv[sys.argv.index("--") + 1]).resolve()
    version = tuple(int(value) for value in bpy.app.version)
    if version != (5, 2, 0):
        raise RuntimeError(f"expected Blender 5.2.0, got {version}")
    strips = enum_inventory(bpy.types.Strip, "type")
    physics = physics_inventory()
    io_operators = operator_inventory()
    binary_path = pathlib.Path(bpy.app.binary_path).resolve()
    inventory = {
        "schemaVersion": 1,
        "task": "M15-01D",
        "operation": "BLENDER_FORMAT_INVENTORY",
        "sourceAnchor": "blender-5.2.0/source/blender/makesrna",
        "runtime": {
            "blenderVersion": text(bpy.app.version_string),
            "versionTuple": list(version),
            "buildHash": text(bpy.app.build_hash),
            "buildBranch": text(bpy.app.build_branch),
            "buildPlatform": text(bpy.app.build_platform),
            "buildType": text(bpy.app.build_type),
            "buildDate": text(bpy.app.build_date),
            "buildTime": text(bpy.app.build_time),
            "binarySha256": sha256_file(binary_path),
        },
        "summary": {"stripTypeCount": len(strips), "physicsTypeCount": len(physics), "ioOperatorCount": len(io_operators)},
        "stripTypes": strips,
        "physicsTypes": physics,
        "ioOperators": io_operators,
        "nextTask": "M15-01E",
    }
    output.parent.mkdir(parents=True, exist_ok=True)
    output.write_text(json.dumps(inventory, indent=2, sort_keys=True) + "\n", encoding="utf-8")
    print(f"blender-format-inventory-generated strips={len(strips)} physics={len(physics)} io={len(io_operators)} output={output}")


if __name__ == "__main__":
    main()