from __future__ import annotations

import json
import tempfile
import unittest
from pathlib import Path

from airfrans_frontier.remote.artifacts import verify_artifacts
from airfrans_frontier.remote.config import load_remote_run_config
from airfrans_frontier.remote.skypilot import render_skypilot_yaml
from airfrans_frontier.remote.vast import VastOffer, choose_offer


class RemoteRunConfigTests(unittest.TestCase):
    def test_loads_remote_smoke_config(self) -> None:
        config = load_remote_run_config("configs/remote_smoke.toml")

        self.assertEqual(config.provider.kind, "vastai")
        self.assertEqual(config.provider.gpu.name, "RTX 4090")
        self.assertEqual(config.job.artifact_dir.as_posix(), "artifacts/current_run")
        self.assertIn("checkpoint.pt", config.artifacts.required)


class VastSelectionTests(unittest.TestCase):
    def test_selection_filters_bad_hosts_and_drops_suspiciously_cheap_tail(self) -> None:
        config = load_remote_run_config("configs/remote_smoke.toml")
        offers = [
            offer(1, price=0.10, host=1),
            offer(2, price=0.20, host=2),
            offer(3, price=0.30, host=3),
            offer(4, price=0.40, host=4),
            offer(5, price=0.50, host=59017),
            offer(6, price=0.25, host=6, geo="CN"),
            offer(7, price=0.26, host=7, verification="deverified"),
        ]

        result = choose_offer(offers, config, query={"test": True})

        # Four reachable RTX 4090 offers remain; drop_cheap_frac=0.30 drops floor(1.2)=1 cheapest.
        self.assertEqual(result.selected_offer_id, 2)
        self.assertEqual(result.candidate_count, 7)
        self.assertEqual(result.survivor_count, 3)

    def test_rendered_yaml_injects_selected_offer(self) -> None:
        config = load_remote_run_config("configs/remote_smoke.toml")
        result = choose_offer([offer(123, price=0.30, host=22), offer(124, price=0.40, host=23)], config, query={})

        yaml = render_skypilot_yaml(config, result, run_id="airfrans-test")

        self.assertIn("selected_offer_id: 123", yaml)
        self.assertNotIn("sky launch", yaml)
        self.assertIn("remote-run smoke-train", yaml)


class ArtifactVerificationTests(unittest.TestCase):
    def test_verify_artifacts_requires_contract_files_and_writes_manifest(self) -> None:
        with tempfile.TemporaryDirectory() as tmp:
            root = Path(tmp)
            (root / "final_metrics.json").write_text(json.dumps({"loss": 1.0}) + "\n")
            (root / "metrics.jsonl").write_text(json.dumps({"step": 0}) + "\n")
            (root / "checkpoint.pt").write_bytes(b"weights")
            (root / "run_manifest.json").write_text(json.dumps({"exit_code": 0}) + "\n")

            manifest = verify_artifacts(root)

            self.assertEqual(manifest["file_count"], 4)
            self.assertTrue((root / "artifact_manifest.json").is_file())
            self.assertTrue((root / "checksums.txt").is_file())


def offer(
    offer_id: int,
    *,
    price: float,
    host: int,
    geo: str = "US",
    verification: str = "verified",
) -> VastOffer:
    return VastOffer(
        id=offer_id,
        gpu_name="RTX 4090",
        dph_total=price,
        gpu_ram=24_000,
        geolocation=geo,
        inet_down_cost_per_tb=0.0,
        inet_up_cost_per_tb=0.0,
        host_id=host,
        verification=verification,
        reliability2=0.99,
        cuda_max_good=12.8,
        direct_port_count=1,
        inet_down=500.0,
        inet_up=100.0,
        verified=True,
    )


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