"""
Minimal Solana JSON-RPC over HTTP (stdlib only).

Some public RPCs return a bare string for ``sendTransaction`` ``result`` without
extra fields that ``solana-py``'s ``SendTransactionResp`` expects, which makes
``Client.send_raw_transaction`` panic while deserializing (missing JSON field
``data``). Use :func:`send_transaction_wire` for submission; keep ``solders``
(or ``solana-py``) only for signing and local serialization.
"""

from __future__ import annotations

import base64
import json
import time
import urllib.error
import urllib.request
from typing import Any


DEFAULT_USER_AGENT = "proxmox-scripts/solana-jsonrpc/1.0"


class SolanaJsonRpcError(RuntimeError):
    """JSON-RPC error object or unexpected HTTP / parse failure."""

    def __init__(self, message: str, *, payload: dict[str, Any] | None = None) -> None:
        super().__init__(message)
        self.payload = payload


def post_json_rpc(
    rpc_url: str,
    method: str,
    params: list[Any],
    *,
    request_id: int = 1,
    timeout_s: float = 90.0,
    user_agent: str = DEFAULT_USER_AGENT,
) -> dict[str, Any]:
    body = json.dumps(
        {"jsonrpc": "2.0", "id": request_id, "method": method, "params": params}
    ).encode("utf-8")
    req = urllib.request.Request(
        rpc_url,
        data=body,
        headers={"Content-Type": "application/json", "User-Agent": user_agent},
        method="POST",
    )
    try:
        with urllib.request.urlopen(req, timeout=timeout_s) as resp:
            raw = resp.read().decode("utf-8")
    except urllib.error.HTTPError as e:
        try:
            detail = e.read().decode("utf-8", errors="replace")
        except Exception:
            detail = str(e)
        raise SolanaJsonRpcError(f"HTTP {e.code}: {detail}") from e

    try:
        out: dict[str, Any] = json.loads(raw)
    except json.JSONDecodeError as e:
        raise SolanaJsonRpcError(f"invalid JSON from RPC: {raw[:500]!r}") from e

    err = out.get("error")
    if err:
        raise SolanaJsonRpcError(f"RPC error: {err}", payload=out)
    return out


def get_latest_blockhash(
    rpc_url: str, *, commitment: str = "confirmed", timeout_s: float = 30.0
) -> str:
    out = post_json_rpc(
        rpc_url,
        "getLatestBlockhash",
        [{"commitment": commitment}],
        timeout_s=timeout_s,
    )
    try:
        return str(out["result"]["value"]["blockhash"])
    except (KeyError, TypeError) as e:
        raise SolanaJsonRpcError(f"unexpected getLatestBlockhash shape: {out!r}") from e


def get_balance_lamports(
    rpc_url: str, pubkey_b58: str, *, commitment: str = "confirmed"
) -> int:
    out = post_json_rpc(
        rpc_url,
        "getBalance",
        [pubkey_b58, {"commitment": commitment}],
    )
    try:
        return int(out["result"]["value"])
    except (KeyError, TypeError, ValueError) as e:
        raise SolanaJsonRpcError(f"unexpected getBalance shape: {out!r}") from e


def send_transaction_wire(
    rpc_url: str,
    signed_wire: bytes,
    *,
    skip_preflight: bool = False,
    preflight_commitment: str = "confirmed",
    max_retries: int | None = None,
    timeout_s: float = 90.0,
) -> str:
    """
    Submit a fully signed legacy or versioned transaction (wire bytes).

    Returns base58 transaction signature string from ``result``.
    """
    opts: dict[str, Any] = {
        "encoding": "base64",
        "skipPreflight": skip_preflight,
        "preflightCommitment": preflight_commitment,
    }
    if max_retries is not None:
        opts["maxRetries"] = max_retries

    params: list[Any] = [base64.b64encode(signed_wire).decode("ascii"), opts]
    out = post_json_rpc(rpc_url, "sendTransaction", params, timeout_s=timeout_s)
    result = out.get("result")
    if not isinstance(result, str):
        raise SolanaJsonRpcError(f"unexpected sendTransaction result: {out!r}")
    return result


def get_signature_statuses(
    rpc_url: str,
    signatures: list[str],
    *,
    search_transaction_history: bool = False,
) -> list[dict[str, Any] | None]:
    """Return one status object (or null) per signature, same order as input."""
    if search_transaction_history:
        params: list[Any] = [signatures, {"searchTransactionHistory": True}]
    else:
        params = [signatures]
    out = post_json_rpc(rpc_url, "getSignatureStatuses", params)
    try:
        val = out["result"]["value"]
    except (KeyError, TypeError) as e:
        raise SolanaJsonRpcError(f"unexpected getSignatureStatuses shape: {out!r}") from e
    if not isinstance(val, list):
        raise SolanaJsonRpcError(f"unexpected getSignatureStatuses value: {val!r}")
    out_list: list[dict[str, Any] | None] = []
    for item in val:
        if item is None:
            out_list.append(None)
        elif isinstance(item, dict):
            out_list.append(item)
        else:
            raise SolanaJsonRpcError(f"unexpected status entry: {item!r}")
    return out_list


def wait_until_signature_confirmed(
    rpc_url: str,
    signature: str,
    *,
    timeout_s: float = 90.0,
    poll_interval_s: float = 1.0,
) -> dict[str, Any]:
    """
    Poll ``getSignatureStatuses`` until the signature has a terminal ``err`` or
    reaches ``confirmationStatus`` of ``confirmed`` / ``finalized``.
    """
    deadline = time.monotonic() + timeout_s
    last: dict[str, Any] | None = None
    while time.monotonic() < deadline:
        statuses = get_signature_statuses(rpc_url, [signature])
        st = statuses[0] if statuses else None
        last = st
        if st is None:
            time.sleep(poll_interval_s)
            continue
        err = st.get("err")
        if err:
            raise SolanaJsonRpcError(f"transaction failed: err={err!r}", payload=st)
        conf = st.get("confirmationStatus")
        if conf in ("confirmed", "finalized"):
            return st
        time.sleep(poll_interval_s)
    raise SolanaJsonRpcError(
        f"timeout waiting for confirmation of {signature!r}; last={last!r}"
    )