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from __future__ import annotations

from dataclasses import dataclass, field

from tokenspeed_kernel.profiling import ProfilingConfig

__all__ = ["BenchmarkConfig"]


@dataclass
class BenchmarkConfig:
    """Configuration for a benchmark run."""

    warmup_iters: int = 10
    bench_iters: int = 100
    verify: bool = True
    percentiles: list[float] = field(default_factory=lambda: [50.0, 90.0, 99.0])
    use_cuda_events: bool = True
    seed: int = 42
    proton_profile: bool = False
    proton_config: ProfilingConfig | None = None

    def validate(self) -> None:
        if self.warmup_iters < 0:
            raise ValueError("warmup_iters must be >= 0")
        if self.bench_iters <= 0:
            raise ValueError("bench_iters must be > 0")
        if not isinstance(self.verify, bool):
            raise ValueError("verify must be a bool")
        if not self.percentiles:
            raise ValueError("percentiles must not be empty")
        for percentile in self.percentiles:
            if percentile < 0 or percentile > 100:
                raise ValueError("percentiles must be in [0, 100]")

        if not isinstance(self.proton_profile, bool):
            raise ValueError("proton_profile must be a bool")

        if self.proton_config is None:
            return

        if not isinstance(self.proton_config, ProfilingConfig):
            raise ValueError("proton_config must be a ProfilingConfig")

        if not self.proton_config.output:
            raise ValueError("proton_config.output must be non-empty")

        if self.proton_config.data not in {"tree", "trace"}:
            raise ValueError("proton_config.data must be one of: tree, trace")

        if self.proton_config.backend not in {None, "cupti", "roctracer"}:
            raise ValueError(
                "proton_config.backend must be one of: None, cupti, roctracer"
            )

        if self.proton_config.mode not in {None, "pcsampling", "periodic_flushing"}:
            raise ValueError(
                "proton_config.mode must be one of: None, pcsampling, periodic_flushing"
            )

        if self.proton_config.hook not in {None, "triton"}:
            raise ValueError("proton_config.hook must be one of: None, triton")

        if self.proton_config.output_format not in {
            "",
            "hatchet",
            "hatchet_msgpack",
            "chrome_trace",
        }:
            raise ValueError(
                "proton_config.output_format must be one of: '', hatchet, "
                "hatchet_msgpack, chrome_trace"
            )