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from __future__ import annotations

import json
import os
import sys
import unittest
from pathlib import Path

SERVICE_ROOT = Path(__file__).resolve().parents[1]
BACKEND_ROOT = SERVICE_ROOT.parent
GOLDEN_ROOT = BACKEND_ROOT / "tests" / "golden" / "prompts"
if str(SERVICE_ROOT) not in sys.path:
    sys.path.insert(0, str(SERVICE_ROOT))

from inference.client import build_payload  # noqa: E402
from prompts.chat_system import chat_system_prompt  # noqa: E402
from prompts.json_repair_system import JSON_REPAIR_SYSTEM  # noqa: E402
from prompts.review_system import review_system_prompt  # noqa: E402
from prompts.review_user import review_user_prompt  # noqa: E402


class PromptPayloadTests(unittest.TestCase):
    def test_payload_preserves_system_user_delimiters(self) -> None:
        payload = build_payload(
            system_prompt="SYSTEM BODY",
            user_prompt="USER BODY",
            max_tokens=128,
            temperature=0.1,
        )
        self.assertEqual(payload["messages"][0], {
            "role": "system",
            "content": "SYSTEM BODY",
        })
        user_content = payload["messages"][1]["content"]
        self.assertIn("SYSTEM INSTRUCTIONS:", user_content)
        self.assertIn("SYSTEM BODY", user_content)
        self.assertIn("USER INPUT:", user_content)
        self.assertIn("USER BODY", user_content)
        self.assertEqual(payload["tools"], [{"type": "web_search"}])

    def test_review_system_matches_golden_template(self) -> None:
        golden_path = GOLDEN_ROOT / "static" / "python-review-system-template.txt"
        golden = golden_path.read_text(encoding="utf-8")
        rendered = review_system_prompt(10)
        self.assertTrue(rendered.startswith(golden.split("{{REVIEW_SCHEMA}}")[0]))
        self.assertIn("Return at most 10 findings.", rendered)

    def test_json_repair_system_matches_golden(self) -> None:
        golden = (GOLDEN_ROOT / "static" / "python-json-repair-system.txt").read_text(
            encoding="utf-8"
        )
        self.assertEqual(JSON_REPAIR_SYSTEM, golden.strip())

    def test_review_user_matches_golden(self) -> None:
        fixture_path = GOLDEN_ROOT / "composed" / "python-review-user.json"
        fixture = json.loads(fixture_path.read_text(encoding="utf-8"))
        fix = fixture["fixture"]
        rendered = review_user_prompt(
            review_text=fix["reviewText"],
            document_name=fix["documentName"],
            playbook_name=fix["playbookName"],
            playbook_text=fix["playbookText"],
        )
        self.assertEqual(rendered, fixture["user"])

    def test_chat_system_matches_golden(self) -> None:
        fixture_path = GOLDEN_ROOT / "composed" / "python-chat-user.json"
        fixture = json.loads(fixture_path.read_text(encoding="utf-8"))
        rendered = chat_system_prompt(
            playbook_name=fixture["fixture"]["playbookName"],
            role_brief=fixture["fixture"]["roleBrief"],
        )
        golden = (GOLDEN_ROOT / "static" / "python-chat-system-buyer.txt").read_text(
            encoding="utf-8"
        )
        self.assertEqual(rendered, golden.strip())


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