"""T57: Integration test — fixture event → rule → spawn log → IssueSink.

No Temporal, no live DB required. Tests the complete event-bridge pipeline:
  1. Parse ActivityDefinition from file
  2. Evaluate rules against mock context data (per-repo iteration)
  3. Emit matching TaskSpecs via NullSink
  4. Assert spawn log entries have correct source_id, condition_matched, and event ID

Uses the weekly-sbom-staleness definition as a concrete test case.
"""

from __future__ import annotations

import uuid
from datetime import datetime, timezone
from pathlib import Path

import pytest

from activity_core.definition_parser import parse_file
from activity_core.issue_sink import NullSink
from activity_core.models import EventEnvelope
from activity_core.rules.evaluator import evaluate_condition
from activity_core.rules.models import TaskRef, TaskSpec

_DEFINITIONS_DIR = Path(__file__).parent.parent / "activity-definitions"
_SBOM_DEF_PATH = _DEFINITIONS_DIR / "weekly-sbom-staleness.md"


# ── Helpers ───────────────────────────────────────────────────────────────────

class _EmptyEvent:
    """Stub event with no attributes (simulates a cron tick)."""
    pass


def _build_event(event_id: str) -> EventEnvelope:
    return EventEnvelope(
        id=event_id,
        type="org.cron.tick",
        timestamp=datetime.now(tz=timezone.utc),
        publisher="activity-core/scheduler",
    )


def _run_rule_pipeline(
    rule: dict,
    repos: list[dict],
    event: _EmptyEvent,
    sink: NullSink,
) -> tuple[list[TaskRef], list[dict]]:
    """Evaluate one rule against each repo in mock data, emit via sink.

    Returns (task_refs, spawn_log_entries).
    Simulates the per-repo iteration that a real context resolver + workflow
    would perform for multi-repo SBOM checks.
    """
    task_refs: list[TaskRef] = []
    spawn_log: list[dict] = []
    triggering_event_id = str(uuid.uuid4())

    for repo in repos:
        context = {"repos": repo}
        if not evaluate_condition(rule["condition"], event, context):
            continue

        action = rule.get("action", {})
        spec = TaskSpec(
            title=f"Run SBOM rescan — {repo['repo_slug']}",
            description="SBOM rescan needed — age threshold exceeded.",
            target_repo=repo["repo_slug"],
            priority=action.get("priority", "medium"),
            labels=action.get("labels", []),
            source_type="rule",
            source_id=rule["id"],
            triggering_event_id=triggering_event_id,
        )
        ref = sink.emit(spec)
        task_refs.append(ref)
        spawn_log.append({
            "source_id": rule["id"],
            "condition_matched": rule["condition"],
            "triggering_event_id": triggering_event_id,
            "task_ref": ref.external_id,
        })

    return task_refs, spawn_log


# ── Tests ─────────────────────────────────────────────────────────────────────

def test_sbom_definition_parses_correctly():
    defn = parse_file(_SBOM_DEF_PATH)
    assert defn.id == "weekly-sbom-staleness"
    assert defn.trigger_config["trigger_type"] == "cron"
    assert defn.trigger_config["cron_expression"] == "0 9 * * 1"
    assert len(defn.rules) == 1
    assert defn.rules[0]["id"] == "flag-stale-sbom"


def test_pipeline_emits_one_task_for_stale_repo_only():
    """Stale repo (45 days) matches; fresh repo (10 days) does not."""
    defn = parse_file(_SBOM_DEF_PATH)
    rule = defn.rules[0]

    repos = [
        {"repo_slug": "repo-a", "sbom_age_days": 45},  # stale — should match
        {"repo_slug": "repo-b", "sbom_age_days": 10},  # fresh — should not
    ]

    task_refs, spawn_log = _run_rule_pipeline(rule, repos, _EmptyEvent(), NullSink())

    # Step 5: one TaskSpec returned (repo-a only)
    assert len(task_refs) == 1

    # Step 6: NullSink returned a synthetic TaskRef
    assert task_refs[0].backend == "null"
    assert task_refs[0].external_id.startswith("null-")

    # Step 7: one spawn_log entry with correct fields
    assert len(spawn_log) == 1
    entry = spawn_log[0]
    assert entry["source_id"] == "flag-stale-sbom"
    assert entry["condition_matched"] == "context.repos.sbom_age_days > 30"
    assert entry["triggering_event_id"] == spawn_log[0]["triggering_event_id"]


def test_pipeline_emits_no_tasks_when_all_repos_fresh():
    defn = parse_file(_SBOM_DEF_PATH)
    rule = defn.rules[0]

    repos = [
        {"repo_slug": "repo-x", "sbom_age_days": 5},
        {"repo_slug": "repo-y", "sbom_age_days": 28},
    ]

    task_refs, spawn_log = _run_rule_pipeline(rule, repos, _EmptyEvent(), NullSink())

    assert task_refs == []
    assert spawn_log == []


def test_pipeline_emits_multiple_tasks_when_multiple_stale():
    defn = parse_file(_SBOM_DEF_PATH)
    rule = defn.rules[0]

    repos = [
        {"repo_slug": "repo-a", "sbom_age_days": 60},
        {"repo_slug": "repo-b", "sbom_age_days": 45},
        {"repo_slug": "repo-c", "sbom_age_days": 10},
    ]

    task_refs, spawn_log = _run_rule_pipeline(rule, repos, _EmptyEvent(), NullSink())

    assert len(task_refs) == 2
    assert len(spawn_log) == 2
    assert all(e["source_id"] == "flag-stale-sbom" for e in spawn_log)
    # Verify all task_refs are unique
    assert len({r.external_id for r in task_refs}) == 2


def test_pipeline_task_ref_has_null_backend():
    defn = parse_file(_SBOM_DEF_PATH)
    rule = defn.rules[0]
    repos = [{"repo_slug": "stale-repo", "sbom_age_days": 100}]

    task_refs, spawn_log = _run_rule_pipeline(rule, repos, _EmptyEvent(), NullSink())

    assert task_refs[0].backend == "null"
    assert spawn_log[0]["task_ref"] == task_refs[0].external_id


def test_rule_condition_boundary_exactly_30_days():
    """30 days exactly is NOT stale (condition is strict >)."""
    defn = parse_file(_SBOM_DEF_PATH)
    rule = defn.rules[0]

    repos_at_boundary = [{"repo_slug": "repo-edge", "sbom_age_days": 30}]
    task_refs, _ = _run_rule_pipeline(rule, repos_at_boundary, _EmptyEvent(), NullSink())
    assert task_refs == [], "30 days exactly should not trigger (condition is > 30)"

    repos_over_boundary = [{"repo_slug": "repo-edge", "sbom_age_days": 31}]
    task_refs, _ = _run_rule_pipeline(rule, repos_over_boundary, _EmptyEvent(), NullSink())
    assert len(task_refs) == 1, "31 days should trigger"