from __future__ import annotations

import json
import os
import shutil
import subprocess
import tempfile
import unittest
from datetime import date
from decimal import Decimal
from pathlib import Path

from monthly_reports.contracts import (
    ChannelObservation,
    DailyVersionPin,
    MonthlyFact,
    MonthlySnapshot,
)
from monthly_reports.core import build_monthly_report


PROJECT_ROOT = Path(__file__).resolve().parents[1]
BUILDER = PROJECT_ROOT / "monthly_reports" / "xlsx" / "build_workbook.mjs"


def artifact_tool_module() -> str:
    return os.environ.get("MONTHLY_REPORT_ARTIFACT_TOOL_MODULE", "").strip()


def node_binary() -> str:
    return os.environ.get("MONTHLY_REPORT_NODE_BINARY", "").strip() or shutil.which("node") or ""


def report_payload() -> dict:
    source = MonthlyFact(
        daily_record_id=1,
        daily_version_id=100,
        business_date=date(2026, 7, 8),
        channel_key="QBD",
        arrival=date(2026, 7, 8),
        departure=date(2026, 7, 10),
        nights=2,
        adults=2,
        children=0,
        block_code="=SYN-FORMULA-LIKE",
        no_of_rooms=1,
        company_name="SYN-COMPANY",
        confirmation_no="SYN-CONFIRMATION",
        disp_room_no="SYN-ROOM",
        effective_rate_amount=Decimal("450.50"),
        full_name="SYN-GUEST",
        res_comment="SYN-COMMENT",
        trace_text="",
        products="",
        rate_code="SYN-RATE",
        room_category_label="SYN-TYPE",
        real_price=Decimal("450.50"),
        total_price=Decimal("901.00"),
        kb_amount=None,
    )
    report = build_monthly_report(
        2026,
        7,
        date(2026, 7, 26),
        MonthlySnapshot(
            (source,),
            (DailyVersionPin(date(2026, 7, 8), 100),),
            (ChannelObservation(date(2026, 7, 8), 100, "QBD", 1, 1),),
        ),
    )
    return report.to_workbook_payload()


@unittest.skipUnless(
    bool(artifact_tool_module() and Path(artifact_tool_module()).is_file()),
    "artifact-tool module is not configured",
)
class MonthlyReportsXlsxTests(unittest.TestCase):
    def test_builder_exports_reopens_scans_and_renders_every_channel(self):
        node = node_binary()
        if not node:
            self.skipTest("Node.js is unavailable")
        with tempfile.TemporaryDirectory(prefix="monthly-report-xlsx-") as temp_dir:
            root = Path(temp_dir)
            payload_path = root / "payload.json"
            payload_path.write_text(
                json.dumps(report_payload(), ensure_ascii=False),
                encoding="utf-8",
            )
            output = root / "monthly.xlsx"
            previews = root / "previews"
            summary_path = root / "summary.json"
            completed = subprocess.run(
                [
                    node,
                    str(BUILDER),
                    str(payload_path),
                    str(output),
                    str(previews),
                    str(summary_path),
                ],
                cwd=PROJECT_ROOT,
                capture_output=True,
                text=True,
                timeout=120,
                check=False,
                env=os.environ.copy(),
            )

            self.assertEqual(completed.returncode, 0, completed.stderr)
            summary = json.loads(summary_path.read_text(encoding="utf-8"))
            self.assertEqual(summary["sheet_names"][:5], [
                "LIANTAI-GROUP", "LIANTAI-FIT", "QBD", "DY-AI-Easy-KB", "FENGRUN"
            ])
            self.assertEqual(summary["row_counts"], [0, 0, 1, 0, 0])
            self.assertEqual(summary["formula_count"], 0)
            self.assertEqual(summary["preview_count"], 5)
            self.assertEqual(len(list(previews.glob("sheet-*.png"))), 5)
            self.assertEqual(output.stat().st_mode & 0o777, 0o600)
            self.assertFalse(Path(f"{output}.inspect.ndjson").exists())

    def test_invalid_payload_returns_only_stable_error_code(self):
        node = node_binary()
        if not node:
            self.skipTest("Node.js is unavailable")
        with tempfile.TemporaryDirectory(prefix="monthly-report-xlsx-") as temp_dir:
            root = Path(temp_dir)
            invalid = root / "invalid.json"
            invalid.write_text(
                json.dumps({"schema_version": "bad", "sensitive": "SYN-SECRET"}),
                encoding="utf-8",
            )
            completed = subprocess.run(
                [
                    node,
                    str(BUILDER),
                    str(invalid),
                    str(root / "invalid.xlsx"),
                    str(root / "previews"),
                    str(root / "summary.json"),
                ],
                cwd=PROJECT_ROOT,
                capture_output=True,
                text=True,
                timeout=30,
                check=False,
                env=os.environ.copy(),
            )
            self.assertEqual(completed.returncode, 4)
            self.assertEqual(
                json.loads(completed.stderr),
                {
                    "status": "failed",
                    "code": "MONTHLY_REPORT_OUTPUT_VALIDATION_FAILED",
                },
            )
            self.assertNotIn("SYN-SECRET", completed.stderr)


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