from __future__ import annotations

import json

import pytest

from src.services.observability_contract_matrix import load_latest_observability_contract_matrix


def test_load_latest_observability_contract_matrix_reads_newest_file(tmp_path):
    older = _snapshot(generated_at="2026-06-04T00:00:00+08:00", completion=40)
    newer = _snapshot(generated_at="2026-06-05T00:00:00+08:00", completion=100)
    (tmp_path / "observability_contract_matrix_2026-06-04.json").write_text(
        json.dumps(older),
        encoding="utf-8",
    )
    (tmp_path / "observability_contract_matrix_2026-06-05.json").write_text(
        json.dumps(newer),
        encoding="utf-8",
    )

    loaded = load_latest_observability_contract_matrix(tmp_path)

    assert loaded["generated_at"] == "2026-06-05T00:00:00+08:00"
    assert loaded["program_status"]["overall_completion_percent"] == 100
    assert loaded["rollups"]["total_surfaces"] == 2
    assert loaded["operation_boundaries"]["alertmanager_to_openclaw_allowed"] is False


def test_observability_contract_matrix_requires_read_only_mode(tmp_path):
    snapshot = _snapshot()
    snapshot["program_status"]["read_only_mode"] = False
    (tmp_path / "observability_contract_matrix_2026-06-05.json").write_text(
        json.dumps(snapshot),
        encoding="utf-8",
    )

    with pytest.raises(ValueError, match="read_only_mode"):
        load_latest_observability_contract_matrix(tmp_path)


def test_observability_contract_matrix_blocks_route_and_rule_mutations(tmp_path):
    snapshot = _snapshot()
    snapshot["operation_boundaries"]["prometheus_rule_write_allowed"] = True
    snapshot["operation_boundaries"]["alertmanager_to_openclaw_allowed"] = True
    (tmp_path / "observability_contract_matrix_2026-06-05.json").write_text(
        json.dumps(snapshot),
        encoding="utf-8",
    )

    with pytest.raises(ValueError, match="operation boundaries"):
        load_latest_observability_contract_matrix(tmp_path)


def test_observability_contract_matrix_requires_rollup_consistency(tmp_path):
    snapshot = _snapshot()
    snapshot["rollups"]["surface_ids_requiring_action"] = []
    (tmp_path / "observability_contract_matrix_2026-06-05.json").write_text(
        json.dumps(snapshot),
        encoding="utf-8",
    )

    with pytest.raises(ValueError, match="surface_ids_requiring_action"):
        load_latest_observability_contract_matrix(tmp_path)


def test_observability_contract_matrix_requires_noise_candidates_to_be_proposal_only(tmp_path):
    snapshot = _snapshot()
    snapshot["noise_reduction_opportunities"][0]["proposal_only"] = False
    (tmp_path / "observability_contract_matrix_2026-06-05.json").write_text(
        json.dumps(snapshot),
        encoding="utf-8",
    )

    with pytest.raises(ValueError, match="proposal_only"):
        load_latest_observability_contract_matrix(tmp_path)


def test_observability_contract_matrix_requires_openclaw_receiver_denial(tmp_path):
    snapshot = _snapshot()
    snapshot["operator_contract"]["must_not_interpret_as"].remove(
        "Alertmanager 指向 OpenClaw receiver 批准"
    )
    (tmp_path / "observability_contract_matrix_2026-06-05.json").write_text(
        json.dumps(snapshot),
        encoding="utf-8",
    )

    with pytest.raises(ValueError, match="operator_contract"):
        load_latest_observability_contract_matrix(tmp_path)


def test_observability_contract_matrix_rejects_secret_payload_keys(tmp_path):
    snapshot = _snapshot()
    snapshot["latest_observations"][0]["webhook_secret"] = "redacted"
    (tmp_path / "observability_contract_matrix_2026-06-05.json").write_text(
        json.dumps(snapshot),
        encoding="utf-8",
    )

    with pytest.raises(ValueError, match="forbidden secret payload key"):
        load_latest_observability_contract_matrix(tmp_path)


def test_observability_contract_matrix_fails_when_missing(tmp_path):
    with pytest.raises(FileNotFoundError):
        load_latest_observability_contract_matrix(tmp_path)


def _snapshot(
    *,
    generated_at: str = "2026-06-05T00:00:00+08:00",
    completion: int = 100,
) -> dict:
    surfaces = [
        _surface(
            "prometheus_alert_rule_catalog",
            "Prometheus 告警規則合約",
            "prometheus_rules",
            "action_required",
            "proposal_only",
        ),
        _surface(
            "alertmanager_awoooi_route",
            "Alertmanager → AWOOOI API 路由",
            "alertmanager_route",
            "verified",
            "proposal_only",
        ),
    ]
    opportunities = [
        _opportunity("prometheus_noise_rule_tuning", "approval_required"),
        _opportunity("alertmanager_grouping_inhibit_tuning", "approval_required"),
        _opportunity("success_notification_quiet_policy", "preserved"),
    ]
    gaps = [
        {
            "gap_id": "prometheus_alert_rule_catalog_seed",
            "display_name": "Alert rule catalog seed 未正式產品化",
            "status": "action_required",
            "severity": "high",
            "summary": "只讀矩陣已建立，尚未產生 catalog seed。",
            "evidence_refs": ["docs/adr/ADR-090-monitoring-blindspot-governance.md"],
            "next_action": "先產 proposal，不改 rule。",
        }
    ]
    return {
        "schema_version": "observability_contract_matrix_v1",
        "generated_at": generated_at,
        "program_status": {
            "overall_completion_percent": completion,
            "current_priority": "P1",
            "current_task_id": "P1-003",
            "next_task_id": "P1-004",
            "read_only_mode": True,
        },
        "source_refs": ["docs/schemas/observability_contract_matrix_v1.schema.json"],
        "rollups": {
            "total_surfaces": len(surfaces),
            "by_kind": _count_by(surfaces, "kind"),
            "by_status": _count_by(surfaces, "status"),
            "by_evidence_status": _count_by(surfaces, "evidence_status"),
            "by_noise_policy_status": _count_by(surfaces, "noise_policy_status"),
            "surface_ids_requiring_action": ["prometheus_alert_rule_catalog"],
            "surface_ids_with_proposal_only_noise_policy": [
                "alertmanager_awoooi_route",
                "prometheus_alert_rule_catalog",
            ],
            "noise_reduction_opportunities_total": len(opportunities),
            "approval_required_opportunity_ids": [
                "alertmanager_grouping_inhibit_tuning",
                "prometheus_noise_rule_tuning",
            ],
            "classification_gap_ids": ["prometheus_alert_rule_catalog_seed"],
            "read_only_denials_total": 12,
        },
        "observability_surfaces": surfaces,
        "noise_reduction_opportunities": opportunities,
        "classification_gaps": gaps,
        "latest_observations": [
            {
                "observation_id": "alertmanager_receiver_guard",
                "status": "verified",
                "summary": "Alertmanager 不得指向 OpenClaw。",
                "evidence_refs": ["docs/HARD_RULES.md#alertmanager-routing"],
            }
        ],
        "operator_contract": {
            "display_mode": "read_only_observability_contract_matrix",
            "must_not_interpret_as": [
                "Prometheus alert rule 修改批准",
                "Alertmanager receiver / route 修改批准",
                "Alertmanager 指向 OpenClaw receiver 批准",
                "Silence 建立或維護窗口批准",
                "Grafana dashboard 寫入批准",
                "SigNoz / Sentry webhook 設定修改批准",
                "Secret 已讀取或可輸出",
                "Telegram 測試通知批准",
                "deploy / reload / workflow 觸發批准",
                "runtime execution 授權",
            ],
            "secret_display_policy": "只顯示 redacted metadata。",
            "alertmanager_route_policy": "OpenClaw 不接收 Alertmanager webhook；receiver 維持 AWOOOI API。",
            "noise_reduction_policy": "只產生 proposal。",
            "notification_policy": "成功不洗版。",
        },
        "operation_boundaries": {
            "read_only_api_allowed": True,
            "prometheus_rule_write_allowed": False,
            "prometheus_reload_allowed": False,
            "alertmanager_route_write_allowed": False,
            "alertmanager_receiver_change_allowed": False,
            "alertmanager_to_openclaw_allowed": False,
            "silence_create_allowed": False,
            "grafana_dashboard_write_allowed": False,
            "grafana_api_write_allowed": False,
            "signoz_query_mutation_allowed": False,
            "signoz_webhook_change_allowed": False,
            "sentry_webhook_change_allowed": False,
            "otel_collector_deploy_allowed": False,
            "event_exporter_restart_allowed": False,
            "secret_read_allowed": False,
            "secret_plaintext_allowed": False,
            "notification_send_allowed": False,
            "external_api_call_allowed": False,
            "live_prometheus_query_allowed": False,
            "workflow_trigger_allowed": False,
            "deploy_trigger_allowed": False,
            "reload_trigger_allowed": False,
            "runtime_execution_allowed": False,
        },
        "approval_boundaries": {
            "prometheus_rule_change_authorized": False,
            "prometheus_reload_authorized": False,
            "alertmanager_route_change_authorized": False,
            "alertmanager_receiver_change_authorized": False,
            "alertmanager_to_openclaw_authorized": False,
            "silence_authorized": False,
            "grafana_write_authorized": False,
            "signoz_write_authorized": False,
            "sentry_write_authorized": False,
            "otel_deploy_authorized": False,
            "event_exporter_restart_authorized": False,
            "notification_send_authorized": False,
            "external_call_authorized": False,
            "secret_plaintext_allowed": False,
            "workflow_trigger_authorized": False,
            "deploy_reload_authorized": False,
            "runtime_execution_authorized": False,
        },
    }


def _surface(
    surface_id: str,
    display_name: str,
    kind: str,
    status: str,
    noise_policy_status: str,
) -> dict:
    return {
        "surface_id": surface_id,
        "display_name": display_name,
        "kind": kind,
        "status": status,
        "risk_level": "critical",
        "evidence_status": "committed_manifest",
        "noise_policy_status": noise_policy_status,
        "coverage_contract": "只讀 committed evidence。",
        "current_contract": "不得改 live 設定。",
        "evidence_refs": ["docs/HARD_RULES.md"],
        "next_action": "只產 proposal。",
    }


def _opportunity(opportunity_id: str, status: str) -> dict:
    return {
        "opportunity_id": opportunity_id,
        "display_name": opportunity_id,
        "status": status,
        "proposal_only": True,
        "impact": "降噪提案。",
        "evidence_refs": ["docs/HARD_RULES.md"],
        "next_action": "人工批准前不執行。",
    }


def _count_by(items: list[dict], key: str) -> dict[str, int]:
    counts: dict[str, int] = {}
    for item in items:
        value = item[key]
        counts[value] = counts.get(value, 0) + 1
    return counts