import base64
import json
from pathlib import Path

import pytest
from a2a_pack import LocalRunContext, PlatformUserAuth
from a2a_pack.cli.local import load_local_project

from agent import QuoteJudgeStudioV1


ROOT = Path(__file__).resolve().parents[1]
SUCCESS_QUOTES = [
    {"vendor": "Acme Bearings", "unit_price": 10.75, "quantity": 500, "delivery_days": 12, "warranty_months": 12},
    {"vendor": "Beta Industrial", "unit_price": 9.1, "quantity": 500, "delivery_days": 8, "warranty_months": 18},
]
SUCCESS_WEIGHTS = {"price": 50, "delivery": 30, "warranty": 20}


class FakeCursor:
    def __init__(self, row=None):
        self._row = row

    def fetchone(self):
        return self._row


class FakeConn:
    store = {}
    receipts = []

    def __enter__(self):
        return self

    def __exit__(self, exc_type, exc, tb):
        return False

    def execute(self, sql, params):
        normalized = " ".join(sql.lower().split())
        if normalized.startswith("insert into quote_comparisons"):
            tenant, comparison_id, vendor, score, payload_json = params
            self.store[(tenant, comparison_id)] = json.loads(payload_json)
            return FakeCursor()
        if normalized.startswith("select payload from quote_comparisons"):
            tenant, comparison_id = params
            payload = self.store.get((tenant, comparison_id))
            return FakeCursor((payload,) if payload else None)
        if normalized.startswith("insert into quote_execution_receipts"):
            self.receipts.append(params)
            return FakeCursor()
        raise AssertionError(f"unexpected SQL: {sql}")


@pytest.fixture(autouse=True)
def fake_db(monkeypatch):
    FakeConn.store = {}
    FakeConn.receipts = []
    monkeypatch.setenv("DATABASE_URL", "postgresql://example.invalid/quotejudge")
    monkeypatch.setattr("agent._connect", lambda: FakeConn())


@pytest.fixture
def ctx():
    return LocalRunContext(
        auth=PlatformUserAuth(sub="user-123", user_id=123, email="buyer@example.com", scopes=["agent:invoke"]),
        task_id="test-task",
    )


@pytest.mark.asyncio
async def test_success_failure_reload_and_receipt(ctx):
    agent = QuoteJudgeStudioV1()
    success = await agent.invoke_json(
        "compare_quotes",
        ctx,
        {"comparison_id": "studio-quote-v1", "quotes": SUCCESS_QUOTES, "weights": SUCCESS_WEIGHTS},
    )
    assert success["ok"] is True
    assert success["comparison_id"] == "studio-quote-v1"
    assert success["recommendation"]["vendor"] == "Beta Industrial"
    assert success["quotes"][0]["weighted_score"] == 100.0
    assert FakeConn.receipts, "production execution receipt should be persisted"

    failure = await agent.invoke_json(
        "compare_quotes",
        ctx,
        {
            "comparison_id": "studio-quote-invalid",
            "quotes": [{"vendor": "Only Vendor", "unit_price": 10, "quantity": 1, "delivery_days": 5, "warranty_months": 6}],
            "weights": SUCCESS_WEIGHTS,
        },
    )
    assert failure["ok"] is False
    assert failure["code"] == "at_least_two_quotes_required"

    reload = await agent.invoke_json("get_comparison", ctx, {"comparison_id": "studio-quote-v1"})
    assert reload["ok"] is True
    assert reload["comparison_id"] == "studio-quote-v1"
    assert reload["recommendation"]["vendor"] == "Beta Industrial"
    assert reload["reloaded"] is True


@pytest.mark.asyncio
async def test_browser_upload_bridge(ctx):
    agent = QuoteJudgeStudioV1()
    csv_text = "vendor,unit_price,quantity,delivery_days,warranty_months\nAcme Bearings,10.75,500,12,12\nBeta Industrial,9.10,500,8,18\n"
    result = await agent.invoke_json(
        "compare_quotes_upload",
        ctx,
        {
            "comparison_id": "upload-quote-v1",
            "upload": {
                "filename": "quotes.csv",
                "media_type": "text/csv",
                "data_base64": base64.b64encode(csv_text.encode()).decode(),
            },
            "weights": SUCCESS_WEIGHTS,
        },
    )
    assert result["ok"] is True
    assert result["recommendation"]["vendor"] == "Beta Industrial"

    invalid = await agent.invoke_json(
        "compare_quotes_upload",
        ctx,
        {
            "comparison_id": "bad-upload",
            "upload": {"filename": "quotes.csv", "media_type": "text/csv", "data_base64": "%%%not-base64%%%"},
            "weights": SUCCESS_WEIGHTS,
        },
    )
    assert invalid["ok"] is False
    assert invalid["code"] == "invalid_base64"


def test_full_stack_product_contract():
    manifest = (ROOT / "a2a.yaml").read_text(encoding="utf-8")
    source = (ROOT / "agent.py").read_text(encoding="utf-8")
    frontend = (ROOT / "frontend" / "src" / "App.jsx").read_text(encoding="utf-8")

    assert "frontend:" in manifest and "mount: /app" in manifest
    assert "public: false" in manifest
    assert "resources:" in manifest and "databases:" in manifest
    assert "migrations:" in manifest and "db/migrations" in manifest
    assert "PlatformUserAuth" in source
    assert "AgentPlatformResources" in source and "AgentDatabase(" in source
    assert "Skill runner" not in frontend
    assert "QuoteJudge" in frontend
    assert "data_base64" in frontend
    assert "DATABASE_URL" not in frontend

    migrations = list((ROOT / "db" / "migrations").glob("*.sql"))
    assert migrations and all(path.read_text(encoding="utf-8").strip() for path in migrations)

    card = load_local_project(ROOT).agent_cls().card()
    skill_names = {skill.name for skill in card.skills}
    assert {"compare_quotes", "get_comparison", "compare_quotes_upload", "compare_quotes_file"} <= skill_names
    compare_schema = next(skill.input_schema for skill in card.skills if skill.name == "compare_quotes")
    assert set(compare_schema["required"]) == {"comparison_id", "quotes", "weights"}
    upload_schema = next(skill.input_schema for skill in card.skills if skill.name == "compare_quotes_file")
    assert upload_schema["properties"]["document"]["x-a2a-file-upload"]["max_bytes"] == 65536
    databases = card.runtime.platform_resources.databases
    assert databases, "live Agent Card must declare its managed database"
    assert databases[0].scope == "user"
    assert databases[0].migrations is not None
    assert databases[0].migrations.path == "db/migrations"
    assert card.mcp_endpoint == "/mcp"
    assert card.runtime.pricing.caller_pays_llm is False