import shutil
import tempfile
import unittest
from types import SimpleNamespace

import requests

from sglang.srt.environ import envs
from sglang.srt.utils import kill_process_tree
from sglang.test.accuracy_test_runner import AccuracyTestParams
from sglang.test.ci.ci_register import register_cuda_ci

# This eval harness applies the chat_template, which is critical for qwen3.5
# to get good accuracy on gsm8k
from sglang.test.run_combined_tests import run_combined_tests
from sglang.test.run_eval import run_eval
from sglang.test.test_utils import (
    DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
    DEFAULT_URL_FOR_TEST,
    CustomTestCase,
    ModelLaunchSettings,
    popen_launch_server,
)

register_cuda_ci(est_time=1400, suite="stage-c-test-4-gpu-b200")

QWEN35_FP4_MODEL = "nvidia/Qwen3.5-397B-A17B-NVFP4"
QWEN35_27B_MODEL = "Qwen/Qwen3.5-27B"
ACC_THRESHOLDS = {QWEN35_FP4_MODEL: {"gsm8k": 0.95}, QWEN35_27B_MODEL: {"gsm8k": 0.8}}


class TestQwen35FP4(unittest.TestCase):
    def test_gsm8k(self):
        base_args = [
            "--tp-size",
            "4",
            "--chunked-prefill-size",
            "2048",
            "--mamba-scheduler-strategy",
            "extra_buffer",
            "--mamba-track-interval",
            "128",
            "--mamba-ssm-dtype",
            "bfloat16",
            "--max-running-requests",
            "128",
            "--reasoning-parser",
            "qwen3",
            "--attention-backend",
            "trtllm_mha",
            "--quantization",
            "modelopt_fp4",
            "--model-loader-extra-config",
            '{"enable_multithread_load": true,"num_threads": 64}',
        ]

        variants = [
            ModelLaunchSettings(
                QWEN35_FP4_MODEL,
                extra_args=base_args,
                variant="Triton",
            ),
            # TODO: Fix this and re-enable it
            # ModelLaunchSettings(
            #     QWEN35_FP4_MODEL,
            #     extra_args=base_args + ["--linear-attn-decode-backend", "flashinfer"],
            #     variant="FlashInfer",
            # ),
        ]

        run_combined_tests(
            models=variants,
            test_name="Qwen3.5-397B-A17B-NVFP4",
            accuracy_params=AccuracyTestParams(
                dataset="gsm8k",
                baseline_accuracy=ACC_THRESHOLDS[QWEN35_FP4_MODEL]["gsm8k"],
                num_examples=200,
                num_threads=128,
                max_tokens=16000,
                thinking_mode="qwen3",
                temperature=0.6,
                top_p=0.95,
                top_k=20,
            ),
        )


class TestQwen35FP4MTP(CustomTestCase):
    @classmethod
    def setUpClass(cls):
        cls.model = QWEN35_FP4_MODEL
        cls.base_url = DEFAULT_URL_FOR_TEST
        cls.process = popen_launch_server(
            cls.model,
            cls.base_url,
            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
            other_args=[
                "--tp-size",
                "4",
                "--chunked-prefill-size",
                "2048",
                "--mamba-scheduler-strategy",
                "extra_buffer",
                "--mamba-track-interval",
                "128",
                "--mamba-ssm-dtype",
                "bfloat16",
                "--max-running-requests",
                "128",
                "--reasoning-parser",
                "qwen3",
                "--attention-backend",
                "trtllm_mha",
                "--quantization",
                "modelopt_fp4",
                "--speculative-algorithm",
                "NEXTN",
                "--speculative-num-steps",
                "3",
                "--speculative-eagle-topk",
                "1",
                "--speculative-num-draft-tokens",
                "4",
                "--mem-fraction-static",
                "0.8",
                "--model-loader-extra-config",
                '{"enable_multithread_load": true,"num_threads": 64}',
            ],
        )

    @classmethod
    def tearDownClass(cls):
        kill_process_tree(cls.process.pid)

    def test_gsm8k(self):
        args = SimpleNamespace(
            model=self.model,
            eval_name="gsm8k",
            num_shots=5,
            num_examples=200,
            max_tokens=16000,
            num_threads=128,
            repeat=1,
            temperature=0.6,
            top_p=0.95,
            top_k=20,
            base_url=self.base_url,
            host="http://127.0.0.1",
            port=int(self.base_url.split(":")[-1]),
        )
        metrics = run_eval(args)
        print(f"{metrics=}")
        self.assertGreaterEqual(metrics["score"], ACC_THRESHOLDS[self.model]["gsm8k"])

        server_info = requests.get(self.base_url + "/get_server_info")
        avg_spec_accept_length = server_info.json()["internal_states"][0][
            "avg_spec_accept_length"
        ]
        print(f"{avg_spec_accept_length=}")
        self.assertGreater(avg_spec_accept_length, 3.3)


class TestQwen35FP4MTPV2(CustomTestCase):
    @classmethod
    def setUpClass(cls):
        cls.model = QWEN35_FP4_MODEL
        cls.base_url = DEFAULT_URL_FOR_TEST
        envs.SGLANG_ENABLE_SPEC_V2.set(True)
        cls.process = popen_launch_server(
            cls.model,
            cls.base_url,
            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
            other_args=[
                "--tp-size",
                "4",
                "--chunked-prefill-size",
                "2048",
                "--mamba-scheduler-strategy",
                "extra_buffer",
                "--mamba-track-interval",
                "128",
                "--mamba-ssm-dtype",
                "bfloat16",
                "--max-running-requests",
                "128",
                "--reasoning-parser",
                "qwen3",
                "--attention-backend",
                "trtllm_mha",
                "--quantization",
                "modelopt_fp4",
                "--speculative-algorithm",
                "NEXTN",
                "--speculative-num-steps",
                "3",
                "--speculative-eagle-topk",
                "1",
                "--speculative-num-draft-tokens",
                "4",
                "--mem-fraction-static",
                "0.8",
                "--model-loader-extra-config",
                '{"enable_multithread_load": true,"num_threads": 64}',
            ],
        )

    @classmethod
    def tearDownClass(cls):
        envs.SGLANG_ENABLE_SPEC_V2.set(False)
        kill_process_tree(cls.process.pid)

    def test_gsm8k(self):
        args = SimpleNamespace(
            model=self.model,
            eval_name="gsm8k",
            num_shots=5,
            num_examples=200,
            max_tokens=16000,
            num_threads=128,
            repeat=1,
            temperature=0.6,
            top_p=0.95,
            top_k=20,
            base_url=self.base_url,
            host="http://127.0.0.1",
            port=int(self.base_url.split(":")[-1]),
        )
        metrics = run_eval(args)
        print(f"{metrics=}")
        self.assertGreaterEqual(metrics["score"], ACC_THRESHOLDS[self.model]["gsm8k"])

        server_info = requests.get(self.base_url + "/get_server_info")
        avg_spec_accept_length = server_info.json()["internal_states"][0][
            "avg_spec_accept_length"
        ]
        print(f"{avg_spec_accept_length=}")
        self.assertGreater(avg_spec_accept_length, 3.3)


class TestQwen35WithHiCache(CustomTestCase):
    @classmethod
    def setUpClass(cls):
        cls.model = QWEN35_27B_MODEL
        cls.base_url = DEFAULT_URL_FOR_TEST
        cls.storage_dir = tempfile.mkdtemp(prefix="qwen35-hicache-")
        env = {
            "SGLANG_HICACHE_FILE_BACKEND_STORAGE_DIR": cls.storage_dir,
        }
        cls.process = popen_launch_server(
            cls.model,
            cls.base_url,
            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
            env=env,
            other_args=[
                "--tp-size",
                "4",
                "--chunked-prefill-size",
                "2048",
                "--mamba-scheduler-strategy",
                "extra_buffer",
                "--mamba-track-interval",
                "128",
                "--mamba-ssm-dtype",
                "bfloat16",
                "--max-running-requests",
                "128",
                "--reasoning-parser",
                "qwen3",
                "--model-loader-extra-config",
                '{"enable_multithread_load": true,"num_threads": 64}',
                "--hicache-mem-layout",
                "page_first_direct",
                "--enable-hierarchical-cache",
                "--hicache-ratio",
                "2",
                "--hicache-size",
                "0",
                "--hicache-write-policy",
                "write_through",
                "--hicache-storage-backend",
                "file",
                "--hicache-storage-prefetch-policy",
                "wait_complete",
            ],
        )

    @classmethod
    def tearDownClass(cls):
        kill_process_tree(cls.process.pid)
        shutil.rmtree(cls.storage_dir, ignore_errors=True)

    def test_gsm8k(self):
        args = SimpleNamespace(
            model=self.model,
            eval_name="gsm8k",
            num_shots=5,
            num_examples=200,
            max_tokens=16000,
            num_threads=128,
            repeat=1,
            temperature=0.6,
            top_p=0.95,
            top_k=20,
            base_url=self.base_url,
            host="http://127.0.0.1",
            port=int(self.base_url.split(":")[-1]),
        )
        metrics = run_eval(args)
        print(f"{metrics=}")
        self.assertGreaterEqual(metrics["score"], ACC_THRESHOLDS[self.model]["gsm8k"])


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