"""Tests for the Slack interactions Lambda endpoint.

Covers: signature verification, drill_category modal, drill_site modal,
base64-encoded bodies, non-block_actions payloads, and missing-field no-ops.
"""

from __future__ import annotations

import base64
import json
from urllib.parse import urlencode


def _make_event(
    payload_dict: dict,
    *,
    timestamp: str = "1234567890",
    signature: str = "v0=fakesig",
    base64_encoded: bool = False,
) -> dict:
    """Build a realistic API Gateway HTTP API event for Slack interactions."""
    raw_payload = urlencode({"payload": json.dumps(payload_dict)})
    body: str
    if base64_encoded:
        body = base64.b64encode(raw_payload.encode("utf-8")).decode("utf-8")
    else:
        body = raw_payload
    return {
        "headers": {
            "x-slack-request-timestamp": timestamp,
            "x-slack-signature": signature,
            "content-type": "application/x-www-form-urlencoded",
        },
        "body": body,
        "isBase64Encoded": base64_encoded,
    }


def _block_actions_payload(
    action_id: str,
    value: str,
    trigger_id: str = "trigger123",
) -> dict:
    return {
        "type": "block_actions",
        "trigger_id": trigger_id,
        "actions": [
            {
                "action_id": action_id,
                "value": value,
            }
        ],
    }


# ---------------------------------------------------------------------------
# Tests
# ---------------------------------------------------------------------------


def test_invalid_signature_returns_401_and_no_views_open(monkeypatch):
    import interactions
    import slackio

    monkeypatch.setattr(slackio, "verify_signature", lambda body, ts, sig: False)

    views_open_calls = []
    fake_client = type(
        "C", (), {"views_open": lambda self, **kw: views_open_calls.append(kw)}
    )
    monkeypatch.setattr(slackio, "web_client", lambda: fake_client())

    event = _make_event(
        _block_actions_payload(
            "drill_category:Report / Docs Needed", "Report / Docs Needed"
        )
    )
    resp = interactions.handler(event, None)

    assert resp["statusCode"] == 401
    assert "invalid" in resp["body"].lower()
    assert views_open_calls == []


def test_drill_category_opens_modal_with_matching_wos(monkeypatch):
    import interactions
    import slackio

    monkeypatch.setattr(slackio, "verify_signature", lambda body, ts, sig: True)
    monkeypatch.setattr(
        slackio, "get_dashboard_url", lambda: "https://grafana.example.com"
    )

    details = [
        {"wo_number": "WO-001", "category": "Report / Docs Needed", "site": "ABQ5"},
        {"wo_number": "WO-002", "category": "3rd Escalation", "site": "ACY9"},
        {"wo_number": "WO-003", "category": "Report / Docs Needed", "site": "ABQ5"},
    ]
    monkeypatch.setattr(slackio, "read_meta_json", lambda dt, name: details)

    views_open_calls = []
    fake_client = type(
        "C",
        (),
        {"views_open": lambda self, **kw: views_open_calls.append(kw)},
    )()
    monkeypatch.setattr(slackio, "web_client", lambda: fake_client)

    event = _make_event(
        _block_actions_payload(
            "drill_category:Report / Docs Needed", "Report / Docs Needed"
        )
    )
    resp = interactions.handler(event, None)

    assert resp["statusCode"] == 200
    assert len(views_open_calls) == 1
    call = views_open_calls[0]
    assert call["trigger_id"] == "trigger123"
    view = call["view"]
    # Title must reflect the count (2 matching WOs)
    assert "2" in view["title"]["text"]
    assert "Report / Docs Needed" in view["title"]["text"]


def test_drill_site_filters_on_site_field(monkeypatch):
    import interactions
    import slackio

    monkeypatch.setattr(slackio, "verify_signature", lambda body, ts, sig: True)
    monkeypatch.setattr(
        slackio, "get_dashboard_url", lambda: "https://grafana.example.com"
    )

    details = [
        {"wo_number": "WO-001", "category": "Report / Docs Needed", "site": "ABQ5"},
        {"wo_number": "WO-002", "category": "3rd Escalation", "site": "ACY9"},
        {"wo_number": "WO-003", "category": "Awaiting Scheduling", "site": "ABQ5"},
    ]
    monkeypatch.setattr(slackio, "read_meta_json", lambda dt, name: details)

    views_open_calls = []
    fake_client = type(
        "C",
        (),
        {"views_open": lambda self, **kw: views_open_calls.append(kw)},
    )()
    monkeypatch.setattr(slackio, "web_client", lambda: fake_client)

    event = _make_event(_block_actions_payload("drill_site:ABQ5", "ABQ5"))
    resp = interactions.handler(event, None)

    assert resp["statusCode"] == 200
    assert len(views_open_calls) == 1
    view = views_open_calls[0]["view"]
    # 2 WOs match site ABQ5
    assert "2" in view["title"]["text"]
    assert "ABQ5" in view["title"]["text"]


def test_base64_encoded_body_is_decoded(monkeypatch):
    import interactions
    import slackio

    monkeypatch.setattr(slackio, "verify_signature", lambda body, ts, sig: True)
    monkeypatch.setattr(
        slackio, "get_dashboard_url", lambda: "https://grafana.example.com"
    )
    monkeypatch.setattr(
        slackio,
        "read_meta_json",
        lambda dt, name: [
            {"wo_number": "WO-010", "category": "3rd Escalation", "site": "ACY9"}
        ],
    )

    views_open_calls = []
    fake_client = type(
        "C",
        (),
        {"views_open": lambda self, **kw: views_open_calls.append(kw)},
    )()
    monkeypatch.setattr(slackio, "web_client", lambda: fake_client)

    event = _make_event(
        _block_actions_payload("drill_category:3rd Escalation", "3rd Escalation"),
        base64_encoded=True,
    )
    resp = interactions.handler(event, None)

    assert resp["statusCode"] == 200
    assert len(views_open_calls) == 1


def test_non_block_actions_type_returns_200_no_views_open(monkeypatch):
    import interactions
    import slackio

    monkeypatch.setattr(slackio, "verify_signature", lambda body, ts, sig: True)

    views_open_calls = []
    fake_client = type(
        "C",
        (),
        {"views_open": lambda self, **kw: views_open_calls.append(kw)},
    )()
    monkeypatch.setattr(slackio, "web_client", lambda: fake_client)

    # "view_submission" is a valid Slack payload type but not block_actions
    event = _make_event({"type": "view_submission"})
    resp = interactions.handler(event, None)

    assert resp["statusCode"] == 200
    assert views_open_calls == []


def test_unknown_action_kind_returns_200_no_views_open(monkeypatch):
    """action_id prefix not in _FILTER_FIELD → no-op."""
    import interactions
    import slackio

    monkeypatch.setattr(slackio, "verify_signature", lambda body, ts, sig: True)

    views_open_calls = []
    fake_client = type(
        "C",
        (),
        {"views_open": lambda self, **kw: views_open_calls.append(kw)},
    )()
    monkeypatch.setattr(slackio, "web_client", lambda: fake_client)

    payload = {
        "type": "block_actions",
        "trigger_id": "tid",
        "actions": [{"action_id": "open_dashboard", "value": "something"}],
    }
    event = _make_event(payload)
    resp = interactions.handler(event, None)

    assert resp["statusCode"] == 200
    assert views_open_calls == []


def test_missing_value_returns_200_no_views_open(monkeypatch):
    """action has a valid kind but missing value → no-op."""
    import interactions
    import slackio

    monkeypatch.setattr(slackio, "verify_signature", lambda body, ts, sig: True)

    views_open_calls = []
    fake_client = type(
        "C",
        (),
        {"views_open": lambda self, **kw: views_open_calls.append(kw)},
    )()
    monkeypatch.setattr(slackio, "web_client", lambda: fake_client)

    payload = {
        "type": "block_actions",
        "trigger_id": "tid",
        "actions": [
            {"action_id": "drill_category:Report / Docs Needed"}
        ],  # no value key
    }
    event = _make_event(payload)
    resp = interactions.handler(event, None)

    assert resp["statusCode"] == 200
    assert views_open_calls == []


def test_missing_trigger_id_returns_200_no_views_open(monkeypatch):
    """Valid action but no trigger_id → no-op."""
    import interactions
    import slackio

    monkeypatch.setattr(slackio, "verify_signature", lambda body, ts, sig: True)

    views_open_calls = []
    fake_client = type(
        "C",
        (),
        {"views_open": lambda self, **kw: views_open_calls.append(kw)},
    )()
    monkeypatch.setattr(slackio, "web_client", lambda: fake_client)

    payload = {
        "type": "block_actions",
        # trigger_id absent
        "actions": [
            {
                "action_id": "drill_category:Report / Docs Needed",
                "value": "Report / Docs Needed",
            }
        ],
    }
    event = _make_event(payload)
    resp = interactions.handler(event, None)

    assert resp["statusCode"] == 200
    assert views_open_calls == []


def test_empty_details_json_shows_zero_wos_in_modal(monkeypatch):
    """Details list is empty → views_open still called, modal title shows 0."""
    import interactions
    import slackio

    monkeypatch.setattr(slackio, "verify_signature", lambda body, ts, sig: True)
    monkeypatch.setattr(
        slackio, "get_dashboard_url", lambda: "https://grafana.example.com"
    )
    monkeypatch.setattr(slackio, "read_meta_json", lambda dt, name: [])

    views_open_calls = []
    fake_client = type(
        "C",
        (),
        {"views_open": lambda self, **kw: views_open_calls.append(kw)},
    )()
    monkeypatch.setattr(slackio, "web_client", lambda: fake_client)

    event = _make_event(
        _block_actions_payload("drill_category:3rd Escalation", "3rd Escalation")
    )
    resp = interactions.handler(event, None)

    assert resp["statusCode"] == 200
    assert len(views_open_calls) == 1
    assert "(0)" in views_open_calls[0]["view"]["title"]["text"]