import os
import unittest
from types import SimpleNamespace

from sglang.srt.environ import envs
from sglang.test.ci.ci_register import register_cuda_ci
from sglang.test.run_eval import run_eval
from sglang.test.server_fixtures.disaggregation_fixture import (
    PDDisaggregationServerBase,
)
from sglang.test.test_utils import (
    DEFAULT_HYBRID_GDN_SMALL_MODEL_NAME_FOR_TEST,
    DEFAULT_MODEL_NAME_FOR_TEST,
    DEFAULT_MODEL_NAME_FOR_TEST_MLA,
    DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
    popen_launch_pd_server,
    try_cached_model,
)

register_cuda_ci(est_time=375, stage="base-c", runner_config="8-gpu-h20")


class TestDisaggregationMooncakePrefillLargerTP(PDDisaggregationServerBase):
    @classmethod
    def setUpClass(cls):
        super().setUpClass()
        # Temporarily disable JIT DeepGEMM
        envs.SGLANG_ENABLE_JIT_DEEPGEMM.set(False)

        cls.model = try_cached_model(DEFAULT_MODEL_NAME_FOR_TEST_MLA)

        # Non blocking start servers
        cls.start_prefill()
        cls.start_decode()

        # Block until both
        cls.wait_server_ready(cls.prefill_url + "/health", process=cls.process_prefill)
        cls.wait_server_ready(cls.decode_url + "/health", process=cls.process_decode)

        cls.launch_lb()

    @classmethod
    def start_prefill(cls):
        prefill_args = [
            "--trust-remote-code",
            "--disaggregation-mode",
            "prefill",
            "--disaggregation-bootstrap-port",
            cls.bootstrap_port,
            "--tp",
            "4",
            "--enable-metrics",
            "--enable-request-time-stats-logging",
        ]
        prefill_args += cls.transfer_backend + cls.rdma_devices
        cls.process_prefill = popen_launch_pd_server(
            cls.model,
            cls.prefill_url,
            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
            other_args=prefill_args,
        )

    @classmethod
    def start_decode(cls):
        decode_args = [
            "--trust-remote-code",
            "--disaggregation-mode",
            "decode",
            "--disaggregation-bootstrap-port",
            cls.bootstrap_port,
            "--tp",
            "2",
            "--base-gpu-id",
            "4",
            "--enable-metrics",
            "--enable-request-time-stats-logging",
        ]
        decode_args += cls.transfer_backend + cls.rdma_devices
        cls.process_decode = popen_launch_pd_server(
            cls.model,
            cls.decode_url,
            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
            other_args=decode_args,
        )

    def test_gsm8k(self):
        args = SimpleNamespace(
            base_url=self.base_url,
            model=self.model,
            eval_name="gsm8k",
            api="completion",
            max_tokens=512,
            num_examples=200,
            num_threads=128,
        )
        metrics = run_eval(args)
        print(f"Evaluation metrics: {metrics}")

        self.assertGreater(metrics["score"], 0.60)


class TestDisaggregationMooncakeDecodeLargerTP(PDDisaggregationServerBase):
    @classmethod
    def setUpClass(cls):
        super().setUpClass()
        # Temporarily disable JIT DeepGEMM
        envs.SGLANG_ENABLE_JIT_DEEPGEMM.set(False)

        cls.model = try_cached_model(DEFAULT_MODEL_NAME_FOR_TEST_MLA)

        # Non blocking start servers
        cls.start_prefill()
        cls.start_decode()

        # Block until both
        cls.wait_server_ready(cls.prefill_url + "/health", process=cls.process_prefill)
        cls.wait_server_ready(cls.decode_url + "/health", process=cls.process_decode)

        cls.launch_lb()

    @classmethod
    def start_prefill(cls):
        prefill_args = [
            "--trust-remote-code",
            "--disaggregation-mode",
            "prefill",
            "--disaggregation-bootstrap-port",
            cls.bootstrap_port,
            "--tp",
            "2",
            "--enable-metrics",
            "--enable-request-time-stats-logging",
        ]
        prefill_args += cls.transfer_backend + cls.rdma_devices
        cls.process_prefill = popen_launch_pd_server(
            cls.model,
            cls.prefill_url,
            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
            other_args=prefill_args,
        )

    @classmethod
    def start_decode(cls):
        decode_args = [
            "--trust-remote-code",
            "--disaggregation-mode",
            "decode",
            "--disaggregation-bootstrap-port",
            cls.bootstrap_port,
            "--tp",
            "4",
            "--base-gpu-id",
            "4",
            "--enable-metrics",
            "--enable-request-time-stats-logging",
        ]
        decode_args += cls.transfer_backend + cls.rdma_devices
        cls.process_decode = popen_launch_pd_server(
            cls.model,
            cls.decode_url,
            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
            other_args=decode_args,
        )

    def test_gsm8k(self):
        args = SimpleNamespace(
            base_url=self.base_url,
            model=self.model,
            eval_name="gsm8k",
            api="completion",
            max_tokens=512,
            num_examples=200,
            num_threads=128,
        )
        metrics = run_eval(args)
        print(f"Evaluation metrics: {metrics}")

        self.assertGreater(metrics["score"], 0.60)


class TestDisaggregationMooncakeMHAPrefillLargerTP(PDDisaggregationServerBase):
    @classmethod
    def setUpClass(cls):
        super().setUpClass()
        # Temporarily disable JIT DeepGEMM
        envs.SGLANG_ENABLE_JIT_DEEPGEMM.set(False)

        cls.model = try_cached_model(DEFAULT_MODEL_NAME_FOR_TEST)

        # Non blocking start servers
        cls.start_prefill()
        cls.start_decode()

        # Block until both
        cls.wait_server_ready(cls.prefill_url + "/health", process=cls.process_prefill)
        cls.wait_server_ready(cls.decode_url + "/health", process=cls.process_decode)

        cls.launch_lb()

    @classmethod
    def start_prefill(cls):
        prefill_args = [
            "--trust-remote-code",
            "--disaggregation-mode",
            "prefill",
            "--disaggregation-bootstrap-port",
            cls.bootstrap_port,
            "--tp",
            "4",
            "--enable-metrics",
            "--enable-request-time-stats-logging",
        ]
        prefill_args += cls.transfer_backend + cls.rdma_devices
        cls.process_prefill = popen_launch_pd_server(
            cls.model,
            cls.prefill_url,
            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
            other_args=prefill_args,
        )

    @classmethod
    def start_decode(cls):
        decode_args = [
            "--trust-remote-code",
            "--disaggregation-mode",
            "decode",
            "--disaggregation-bootstrap-port",
            cls.bootstrap_port,
            "--tp",
            "2",
            "--base-gpu-id",
            "4",
            "--enable-metrics",
            "--enable-request-time-stats-logging",
        ]
        decode_args += cls.transfer_backend + cls.rdma_devices
        cls.process_decode = popen_launch_pd_server(
            cls.model,
            cls.decode_url,
            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
            other_args=decode_args,
        )

    def test_gsm8k(self):
        args = SimpleNamespace(
            base_url=self.base_url,
            model=self.model,
            eval_name="gsm8k",
            api="completion",
            max_tokens=512,
            num_examples=200,
            num_threads=128,
        )
        metrics = run_eval(args)
        print(f"Evaluation metrics: {metrics}")

        self.assertGreater(metrics["score"], 0.60)


class TestDisaggregationMooncakeMHADecodeLargerTP(PDDisaggregationServerBase):
    @classmethod
    def setUpClass(cls):
        super().setUpClass()
        # Temporarily disable JIT DeepGEMM
        envs.SGLANG_ENABLE_JIT_DEEPGEMM.set(False)

        cls.model = try_cached_model(DEFAULT_MODEL_NAME_FOR_TEST)

        # Non blocking start servers
        cls.start_prefill()
        cls.start_decode()

        # Block until both
        cls.wait_server_ready(cls.prefill_url + "/health", process=cls.process_prefill)
        cls.wait_server_ready(cls.decode_url + "/health", process=cls.process_decode)

        cls.launch_lb()

    @classmethod
    def start_prefill(cls):
        prefill_args = [
            "--trust-remote-code",
            "--disaggregation-mode",
            "prefill",
            "--disaggregation-bootstrap-port",
            cls.bootstrap_port,
            "--tp",
            "2",
            "--enable-metrics",
            "--enable-request-time-stats-logging",
        ]
        prefill_args += cls.transfer_backend + cls.rdma_devices
        cls.process_prefill = popen_launch_pd_server(
            cls.model,
            cls.prefill_url,
            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
            other_args=prefill_args,
        )

    @classmethod
    def start_decode(cls):
        decode_args = [
            "--trust-remote-code",
            "--disaggregation-mode",
            "decode",
            "--disaggregation-bootstrap-port",
            cls.bootstrap_port,
            "--tp",
            "4",
            "--base-gpu-id",
            "4",
            "--enable-metrics",
            "--enable-request-time-stats-logging",
        ]
        decode_args += cls.transfer_backend + cls.rdma_devices
        cls.process_decode = popen_launch_pd_server(
            cls.model,
            cls.decode_url,
            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
            other_args=decode_args,
        )

    def test_gsm8k(self):
        args = SimpleNamespace(
            base_url=self.base_url,
            model=self.model,
            eval_name="gsm8k",
            api="completion",
            max_tokens=512,
            num_examples=200,
            num_threads=128,
        )
        metrics = run_eval(args)
        print(f"Evaluation metrics: {metrics}")

        self.assertGreater(metrics["score"], 0.60)


# The prefill staging buffer is auto-sized to one chunk (chunked_prefill_size);
# the decode ring is sized manually.
STAGING_ENV = {
    "SGLANG_DISAGG_STAGING_BUFFER": "1",
    "SGLANG_DISAGG_STAGING_POOL_SIZE_MB": "1024",
}


class TestDisaggregationStagingPrefillLargerTP(PDDisaggregationServerBase):
    """Prefill TP=4 -> Decode TP=2 with staging buffer enabled (MHA model)."""

    @classmethod
    def setUpClass(cls):
        super().setUpClass()
        envs.SGLANG_ENABLE_JIT_DEEPGEMM.set(False)

        cls.model = try_cached_model(DEFAULT_MODEL_NAME_FOR_TEST)

        cls.start_prefill()
        cls.start_decode()

        cls.wait_server_ready(cls.prefill_url + "/health", process=cls.process_prefill)
        cls.wait_server_ready(cls.decode_url + "/health", process=cls.process_decode)

        cls.launch_lb()

    @classmethod
    def start_prefill(cls):
        prefill_args = [
            "--trust-remote-code",
            "--disaggregation-mode",
            "prefill",
            "--disaggregation-bootstrap-port",
            cls.bootstrap_port,
            "--tp",
            "4",
            "--enable-metrics",
            "--enable-request-time-stats-logging",
        ]
        prefill_args += cls.transfer_backend + cls.rdma_devices
        env = {**os.environ, **STAGING_ENV}
        cls.process_prefill = popen_launch_pd_server(
            cls.model,
            cls.prefill_url,
            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
            other_args=prefill_args,
            env=env,
        )

    @classmethod
    def start_decode(cls):
        decode_args = [
            "--trust-remote-code",
            "--disaggregation-mode",
            "decode",
            "--disaggregation-bootstrap-port",
            cls.bootstrap_port,
            "--tp",
            "2",
            "--base-gpu-id",
            "4",
            "--enable-metrics",
            "--enable-request-time-stats-logging",
        ]
        decode_args += cls.transfer_backend + cls.rdma_devices
        env = {**os.environ, **STAGING_ENV}
        cls.process_decode = popen_launch_pd_server(
            cls.model,
            cls.decode_url,
            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
            other_args=decode_args,
            env=env,
        )

    def test_gsm8k(self):
        args = SimpleNamespace(
            base_url=self.base_url,
            model=self.model,
            eval_name="gsm8k",
            api="completion",
            max_tokens=512,
            num_examples=200,
            num_threads=128,
        )
        metrics = run_eval(args)
        print(f"[Staging PrefillLargerTP] Evaluation metrics: {metrics}")
        self.assertGreater(metrics["score"], 0.60)


class TestDisaggregationStagingDecodeLargerTP(PDDisaggregationServerBase):
    """Prefill TP=2 -> Decode TP=4 with staging buffer enabled (MHA model)."""

    @classmethod
    def setUpClass(cls):
        super().setUpClass()
        envs.SGLANG_ENABLE_JIT_DEEPGEMM.set(False)

        cls.model = try_cached_model(DEFAULT_MODEL_NAME_FOR_TEST)

        cls.start_prefill()
        cls.start_decode()

        cls.wait_server_ready(cls.prefill_url + "/health", process=cls.process_prefill)
        cls.wait_server_ready(cls.decode_url + "/health", process=cls.process_decode)

        cls.launch_lb()

    @classmethod
    def start_prefill(cls):
        prefill_args = [
            "--trust-remote-code",
            "--disaggregation-mode",
            "prefill",
            "--disaggregation-bootstrap-port",
            cls.bootstrap_port,
            "--tp",
            "2",
            "--enable-metrics",
            "--enable-request-time-stats-logging",
        ]
        prefill_args += cls.transfer_backend + cls.rdma_devices
        env = {**os.environ, **STAGING_ENV}
        cls.process_prefill = popen_launch_pd_server(
            cls.model,
            cls.prefill_url,
            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
            other_args=prefill_args,
            env=env,
        )

    @classmethod
    def start_decode(cls):
        decode_args = [
            "--trust-remote-code",
            "--disaggregation-mode",
            "decode",
            "--disaggregation-bootstrap-port",
            cls.bootstrap_port,
            "--tp",
            "4",
            "--base-gpu-id",
            "4",
            "--enable-metrics",
            "--enable-request-time-stats-logging",
        ]
        decode_args += cls.transfer_backend + cls.rdma_devices
        env = {**os.environ, **STAGING_ENV}
        cls.process_decode = popen_launch_pd_server(
            cls.model,
            cls.decode_url,
            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
            other_args=decode_args,
            env=env,
        )

    def test_gsm8k(self):
        args = SimpleNamespace(
            base_url=self.base_url,
            model=self.model,
            eval_name="gsm8k",
            api="completion",
            max_tokens=512,
            num_examples=200,
            num_threads=128,
        )
        metrics = run_eval(args)
        print(f"[Staging DecodeLargerTP] Evaluation metrics: {metrics}")
        self.assertGreater(metrics["score"], 0.60)


class TestDisaggregationGDNHybridHeteroTP(PDDisaggregationServerBase):
    """Prefill TP=1 -> Decode TP=4 on a GDN-hybrid (gated-delta-net) model.

    Exercises the heterogeneous attn-TP *scatter* path (prefill attn_tp <
    decode attn_tp), where two independent bugs corrupt accuracy without the
    fix in this change set:
      1. GDN conv_state is cat([query|key|value]) with each sub-block
         independently head-sharded; a single contiguous slice straddles the
         q/k/v boundaries and delivers wrong channels.
      2. GQA KV heads are replicated when num_key_value_heads < decode attn_tp;
         the scatter head map must use integer division (tp_rank //
         num_kv_head_replicas), not modulo.
    Without the fix gsm8k collapses (~0.4); with it, it recovers to agg level.
    """

    @classmethod
    def setUpClass(cls):
        super().setUpClass()
        envs.SGLANG_ENABLE_JIT_DEEPGEMM.set(False)

        cls.model = try_cached_model(DEFAULT_HYBRID_GDN_SMALL_MODEL_NAME_FOR_TEST)

        cls.start_prefill()
        cls.start_decode()

        cls.wait_server_ready(cls.prefill_url + "/health", process=cls.process_prefill)
        cls.wait_server_ready(cls.decode_url + "/health", process=cls.process_decode)

        cls.launch_lb()

    @classmethod
    def start_prefill(cls):
        prefill_args = [
            "--trust-remote-code",
            "--disaggregation-mode",
            "prefill",
            "--disaggregation-bootstrap-port",
            cls.bootstrap_port,
            "--tp",
            "1",
            "--enable-metrics",
            "--enable-request-time-stats-logging",
        ]
        prefill_args += cls.transfer_backend + cls.rdma_devices
        cls.process_prefill = popen_launch_pd_server(
            cls.model,
            cls.prefill_url,
            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
            other_args=prefill_args,
        )

    @classmethod
    def start_decode(cls):
        decode_args = [
            "--trust-remote-code",
            "--disaggregation-mode",
            "decode",
            "--disaggregation-bootstrap-port",
            cls.bootstrap_port,
            "--tp",
            "4",
            "--base-gpu-id",
            "4",
            "--enable-metrics",
            "--enable-request-time-stats-logging",
        ]
        decode_args += cls.transfer_backend + cls.rdma_devices
        cls.process_decode = popen_launch_pd_server(
            cls.model,
            cls.decode_url,
            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
            other_args=decode_args,
        )

    def test_gsm8k(self):
        args = SimpleNamespace(
            base_url=self.base_url,
            model=self.model,
            eval_name="gsm8k",
            api="completion",
            max_tokens=512,
            num_examples=200,
            num_threads=128,
        )
        metrics = run_eval(args)
        print(f"[GDNHybridHeteroTP] Evaluation metrics: {metrics}")
        self.assertGreater(metrics["score"], 0.60)


if __name__ == "__main__":
    unittest.main()
