from __future__ import annotations

import unittest

from fastapi import HTTPException
from sqlalchemy import create_engine
from sqlalchemy.orm import Session

from govoplan_access.backend.db.models import Account, Group, User
from govoplan_campaign.backend.db.models import Campaign, CampaignJob, CampaignVersion
from govoplan_campaign.backend.router import (
    _campaign_jobs_grid_filter_expressions,
    _campaign_jobs_ordering,
    _campaign_jobs_page_response,
)
from govoplan_core.core.change_sequence import ChangeSequenceEntry
from govoplan_core.db.base import Base


class CampaignJobListQueryTests(unittest.TestCase):
    def setUp(self) -> None:
        self.engine = create_engine("sqlite+pysqlite:///:memory:")
        Base.metadata.create_all(
            self.engine,
            tables=[
                Account.__table__,
                User.__table__,
                Group.__table__,
                Campaign.__table__,
                CampaignVersion.__table__,
                CampaignJob.__table__,
                ChangeSequenceEntry.__table__,
            ],
        )
        self.session = Session(self.engine)
        rows = [
            (0, "ordinary-0@example.test", "General notice", "ready", "draft", "not_queued", "not_requested", 0),
            (1, "ordinary-1@example.test", "General notice", "ready", "draft", "not_queued", "not_requested", 1),
            (2, "target-c@example.test", "Target notice C", "warning", "queued", "queued", "pending", 2),
            (3, "ordinary-3@example.test", "General notice", "blocked", "draft", "failed_permanent", "failed", 3),
            (4, "target-b@example.test", "Target notice B", "ready", "draft", "failed_temporary", "not_requested", 4),
            (5, "target-a@example.test", "Target notice A", "ready", "draft", "outcome_unknown", "outcome_unknown", 5),
        ]
        for entry_index, recipient, subject, validation, queue, send, imap, attempts in rows:
            self.session.add(CampaignJob(
                id=f"job-{entry_index}",
                tenant_id="tenant-1",
                campaign_id="campaign-1",
                campaign_version_id="version-1",
                entry_index=entry_index,
                entry_id=f"entry-{entry_index}",
                recipient_email=recipient,
                subject=subject,
                message_id_header=f"<message-{entry_index}@example.test>",
                eml_sha256=f"sha-{entry_index}",
                build_status="built",
                validation_status=validation,
                queue_status=queue,
                send_status=send,
                imap_status=imap,
                attempt_count=attempts,
                resolved_attachments=[],
                issues_snapshot=[],
            ))
        self.session.commit()

    def tearDown(self) -> None:
        self.session.close()
        self.engine.dispose()

    def test_grid_filters_apply_before_pagination_and_report_filtered_totals(self) -> None:
        base_filters = [CampaignJob.tenant_id == "tenant-1", CampaignJob.campaign_id == "campaign-1"]
        grid_filters = {"recipient": "target"}
        filtered = [*base_filters, *_campaign_jobs_grid_filter_expressions(grid_filters)]

        page = _campaign_jobs_page_response(
            self.session,
            campaign_id="campaign-1",
            version_id="version-1",
            base_filters=base_filters,
            filtered=filtered,
            reviewed_keys=set(),
            review_metadata={},
            page=1,
            page_size=2,
            grid_filters=grid_filters,
            sort_by="recipient",
            sort_direction="asc",
        )

        self.assertEqual(page.total, 3)
        self.assertEqual(page.total_unfiltered, 6)
        self.assertEqual(page.pages, 2)
        self.assertEqual(
            [row["recipient_email"] for row in page.jobs],
            ["target-a@example.test", "target-b@example.test"],
        )
        self.assertIsNone(page.next_cursor)

    def test_list_and_integer_filters_share_the_full_backend_query(self) -> None:
        expressions = _campaign_jobs_grid_filter_expressions({
            "send": 'list:["failed_temporary","outcome_unknown"]',
            "attempts": "gte:4",
        })

        rows = (
            self.session.query(CampaignJob)
            .filter(*expressions)
            .order_by(*_campaign_jobs_ordering("attempts", "desc"))
            .all()
        )

        self.assertEqual([row.id for row in rows], ["job-5", "job-4"])

    def test_invalid_list_filters_fail_closed(self) -> None:
        with self.assertRaises(HTTPException) as raised:
            _campaign_jobs_grid_filter_expressions({"send": 'list:["not-a-status"]'})

        self.assertEqual(raised.exception.status_code, 422)


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