#!/usr/bin/env python3
"""Generate typed 1000:0270 collision-call data from preserved raw evidence."""

from __future__ import annotations

import argparse
from pathlib import Path

ROOT = Path(__file__).resolve().parent.parent
RAW = ROOT / "TDKPIN_GHIDRA_COMPLETE_RAW.c"
OUTPUT = ROOT / "reconstructed" / "tdkpin_game_setup_collision_data.inc"


def calls_from_raw() -> list[list[int]]:
    text = RAW.read_text(encoding="utf-8")
    start = text.index("/* ===== 1000:0270 ")
    end = text.index("/* ===== 1000:51f5 ", start)
    text = text[start:end]
    needle = "FUN_1008_0138("
    calls: list[list[int]] = []
    position = 0
    while True:
        begin = text.find(needle, position)
        if begin < 0:
            break
        cursor = begin + len(needle)
        depth = 1
        while depth:
            character = text[cursor]
            if character == "(":
                depth += 1
            elif character == ")":
                depth -= 1
            cursor += 1
        arguments = text[begin + len(needle) : cursor - 1]
        words = [
            int(item.strip(), 0) & 0xFFFF
            for item in arguments.replace("\n", "").split(",")
        ]
        if len(words) != 40:
            raise RuntimeError(f"expected 40 words, found {len(words)}")
        calls.append(words)
        position = cursor
    if len(calls) != 177:
        raise RuntimeError(f"expected 177 calls, found {len(calls)}")
    return calls


def u16(value: int) -> str:
    return f"0x{value:04x}u"


def i32(low: int, high: int) -> str:
    value = low | high << 16
    return f"(int32_t)UINT32_C(0x{value:08x})"


def real48(words: list[int]) -> str:
    bytes_ = []
    for word in words:
        bytes_.extend((word & 0xFF, word >> 8))
    return "{{" + ", ".join(f"0x{byte:02x}" for byte in bytes_) + "}}"


def initializer(words: list[int], ordinal: int) -> str:
    fields = [
        f".render_bottom={u16(words[0])}",
        f".render_right={u16(words[1])}",
        f".render_top={u16(words[2])}",
        f".render_left={u16(words[3])}",
        f".fallback_y_adjust={i32(words[4], words[5])}",
        f".fallback_x_adjust={i32(words[6], words[7])}",
        f".layer_mask={u16(words[8])}",
        f".score_low={u16(words[9])}",
        f".score_high={u16(words[10])}",
        f".contact_state={u16(words[11])}",
        f".flags={u16(words[12])}",
        f".response_kick={real48(words[13:16])}",
        f".response_auxiliary={real48(words[16:19])}",
        f".response_tangent={real48(words[19:22])}",
        f".response_normal={real48(words[22:25])}",
        f".radius={i32(words[25], words[26])}",
        f".point2_y={i32(words[27], words[28])}",
        f".point2_x={i32(words[29], words[30])}",
        f".point1_y={i32(words[31], words[32])}",
        f".point1_x={i32(words[33], words[34])}",
        f".coordinate_mode={u16(words[35])}",
        f".subtype={u16(words[36])}",
        f".type={u16(words[37])}",
        f".active={u16(words[38])}",
        f".index={u16(words[39])}",
    ]
    return (
        f"    /* call {ordinal:03d}, record {words[39]:3d} */ "
        "{" + ", ".join(fields) + "},"
    )


def generated_text() -> str:
    calls = calls_from_raw()
    lines = [
        "/* Generated by tools/generate_game_setup_collision_data.py.",
        " * Source: TDKPIN_GHIDRA_COMPLETE_RAW.c, 1000:0270 call order.",
        " * Do not hand-edit; run the generator and its --check mode.",
        " */",
        "static const TdkpinCollisionInitArgs g_game_setup_collision_calls[177] = {",
    ]
    lines.extend(initializer(words, index + 1) for index, words in enumerate(calls))
    lines.append("};")
    lines.append("")
    return "\n".join(lines)


def main() -> int:
    parser = argparse.ArgumentParser()
    parser.add_argument("--check", action="store_true")
    arguments = parser.parse_args()
    generated = generated_text()
    if arguments.check:
        if not OUTPUT.exists() or OUTPUT.read_text(encoding="utf-8") != generated:
            raise SystemExit(f"generated collision data is stale: {OUTPUT}")
        return 0
    OUTPUT.write_text(generated, encoding="utf-8")
    return 0


if __name__ == "__main__":
    raise SystemExit(main())