"""
AI Agent result capture post-release verifier rollback gate snapshot.

Loads the latest committed P2-132 post-release verifier / rollback gate.
This module validates committed evidence only; it never approves owner release,
approves maintenance windows, confirms rollback owners, releases live apply,
applies writers, writes receipts, writes result captures, writes learning
records, updates PlayBook trust, writes reviewer / Gateway queues, sends
Telegram messages, reads secrets, or performs destructive operations.
"""

from __future__ import annotations

import json
from pathlib import Path
from typing import Any

from src.services.snapshot_paths import default_evaluations_dir

_DEFAULT_EVALUATIONS_DIR = default_evaluations_dir(Path(__file__))
_SNAPSHOT_PATTERN = "ai_agent_result_capture_post_release_verifier_rollback_gate_*.json"
_SCHEMA_VERSION = "ai_agent_result_capture_post_release_verifier_rollback_gate_v1"
_RUNTIME_AUTHORITY = "result_capture_post_release_verifier_rollback_gate_only_no_live_write"
# 2026-06-14 Codex: CD retrigger anchor only; loader behavior stays unchanged.


def load_latest_ai_agent_result_capture_post_release_verifier_rollback_gate(
    evaluations_dir: Path | None = None,
) -> dict[str, Any]:
    """Load the newest committed post-release verifier / rollback gate."""
    directory = evaluations_dir or _DEFAULT_EVALUATIONS_DIR
    candidates = sorted(directory.glob(_SNAPSHOT_PATTERN))
    if not candidates:
        raise FileNotFoundError(f"no AI Agent result capture post-release verifier rollback gate snapshots found in {directory}")

    latest = candidates[-1]
    with latest.open(encoding="utf-8") as handle:
        payload = json.load(handle)

    if not isinstance(payload, dict):
        raise ValueError(f"{latest}: expected JSON object")

    label = str(latest)
    _require_schema(payload, label)
    _require_prior(payload, label)
    _require_truth(payload, label)
    _require_verifier_gates(payload, label)
    _require_rollback_gates(payload, label)
    _require_verification_holds(payload, label)
    _require_live_apply_gates(payload, label)
    _require_blocked_transitions(payload, label)
    _require_actions(payload, label)
    _require_display_redaction(payload, label)
    _require_no_forbidden_display_terms(payload, label)
    _require_rollup_consistency(payload, label)
    return payload


def _require_schema(payload: dict[str, Any], label: str) -> None:
    if payload.get("schema_version") != _SCHEMA_VERSION:
        raise ValueError(f"{label}: expected schema_version={_SCHEMA_VERSION}")
    status = payload.get("program_status") or {}
    expected = {
        "current_priority": "P2",
        "current_task_id": "P2-132",
        "next_task_id": "P2-133",
        "read_only_mode": True,
        "runtime_authority": _RUNTIME_AUTHORITY,
        "overall_completion_percent": 100,
    }
    mismatches = _mismatches(status, expected)
    if mismatches:
        raise ValueError(f"{label}: program_status mismatch: {mismatches}")
    if not status.get("status_note"):
        raise ValueError(f"{label}: program_status.status_note is required")


def _require_prior(payload: dict[str, Any], label: str) -> None:
    prior = payload.get("prior_owner_release_approval_gate") or {}
    expected = {
        "schema_version": "ai_agent_result_capture_owner_release_approval_gate_v1",
        "owner_release_approval_packet_count": 5,
        "maintenance_window_approval_gate_count": 5,
        "live_apply_release_approval_gate_count": 5,
        "rollback_owner_approval_check_count": 5,
        "blocked_approval_transition_count": 6,
        "operator_action_count": 5,
        "approval_required_total": 8,
        "blocked_total": 9,
        "owner_release_approved_count": 0,
        "maintenance_window_approved_count": 0,
        "rollback_owner_confirmed_count": 0,
        "post_release_verifier_ready_count": 0,
        "release_approval_pass_count": 0,
        "live_apply_release_pass_count": 0,
        "writer_apply_count": 0,
        "execution_apply_count": 0,
        "receipt_write_count": 0,
        "result_capture_write_count": 0,
        "learning_write_count": 0,
        "playbook_trust_write_count": 0,
        "reviewer_queue_write_count": 0,
        "gateway_queue_write_count": 0,
        "telegram_send_count": 0,
        "bot_api_call_count": 0,
        "report_receipt_write_count": 0,
    }
    mismatches = _mismatches(prior, expected)
    if mismatches:
        raise ValueError(f"{label}: prior_owner_release_approval_gate mismatch: {mismatches}")
    if not prior.get("readiness_note"):
        raise ValueError(f"{label}: prior_owner_release_approval_gate.readiness_note is required")


def _require_truth(payload: dict[str, Any], label: str) -> None:
    truth = payload.get("post_release_verifier_truth") or {}
    required_true = {
        "p2_131_approval_gate_loaded",
        "post_release_verifier_gate_ready",
        "rollback_release_gate_ready",
        "release_verification_hold_active",
        "live_apply_post_release_hold_active",
        "owner_release_review_still_required",
        "maintenance_window_review_still_required",
        "rollback_owner_review_required",
        "redaction_review_required",
        "post_release_verifier_gate_only",
    }
    missing = sorted(field for field in required_true if truth.get(field) is not True)
    if missing:
        raise ValueError(f"{label}: post-release verifier gate flags must remain true: {missing}")

    required_false = {
        "owner_release_approved",
        "maintenance_window_approved",
        "rollback_owner_confirmed",
        "post_release_verifier_ready",
        "release_verification_passed",
        "rollback_release_passed",
        "live_apply_release_passed",
        "writer_apply_enabled",
        "execution_apply_enabled",
        "receipt_write_enabled",
        "reviewer_queue_write_enabled",
        "gateway_queue_write_enabled",
        "telegram_send_enabled",
        "bot_api_call_enabled",
        "report_receipt_write_enabled",
        "result_capture_write_enabled",
        "learning_write_enabled",
        "playbook_trust_write_enabled",
        "production_write_enabled",
        "secret_read_enabled",
        "destructive_operation_enabled",
    }
    unsafe = sorted(field for field in required_false if truth.get(field) is not False)
    if unsafe:
        raise ValueError(f"{label}: post-release verifier live/send/write flags must remain false: {unsafe}")

    zero_counts = {
        "owner_release_approved_count",
        "maintenance_window_approved_count",
        "rollback_owner_confirmed_count",
        "post_release_verifier_ready_count",
        "release_verification_pass_count",
        "rollback_release_pass_count",
        "live_apply_release_pass_count",
        "writer_apply_count",
        "execution_apply_count",
        "receipt_write_count",
        "reviewer_queue_write_count",
        "gateway_queue_write_count",
        "telegram_send_count",
        "bot_api_call_count",
        "report_receipt_write_count",
        "result_capture_write_count",
        "learning_write_count",
        "playbook_trust_write_count",
        "production_write_count",
        "secret_read_count",
        "destructive_operation_count",
    }
    non_zero = sorted(field for field in zero_counts if truth.get(field) != 0)
    if non_zero:
        raise ValueError(f"{label}: post-release verifier live counters must remain zero: {non_zero}")
    if not truth.get("truth_note"):
        raise ValueError(f"{label}: post_release_verifier_truth.truth_note is required")


def _require_verifier_gates(payload: dict[str, Any], label: str) -> None:
    items = payload.get("post_release_verifier_gates") or []
    _require_ids(
        items,
        "gate_id",
        {
            "post_release_verifier_result_capture",
            "post_release_verifier_learning",
            "post_release_verifier_playbook_trust",
            "post_release_verifier_reviewer_queue",
            "post_release_verifier_gateway_queue",
        },
        label,
        "post-release verifier gates",
    )
    for item in items:
        item_id = item.get("gate_id")
        if item.get("gate_mode") != "post_release_verifier_gate":
            raise ValueError(f"{label}: post-release verifier gate {item_id} mode is invalid")
        if item.get("post_release_verifier_ready") is not False or item.get("release_verification_passed") is not False:
            raise ValueError(f"{label}: post-release verifier gate {item_id} must stay unready and unpassed")
        if item.get("status") not in {"ready_for_owner_review", "approval_required", "blocked_by_policy"}:
            raise ValueError(f"{label}: post-release verifier gate {item_id} status is invalid")
        if not item.get("verifier_summary") or not _is_redacted_sha256(item.get("evidence_hash")):
            raise ValueError(f"{label}: post-release verifier gate {item_id} must include summary and redacted evidence_hash")


def _require_rollback_gates(payload: dict[str, Any], label: str) -> None:
    items = payload.get("rollback_release_gates") or []
    _require_count(items, 5, label, "rollback release gates")
    for item in items:
        item_id = item.get("gate_id")
        if item.get("gate_mode") != "rollback_release_gate":
            raise ValueError(f"{label}: rollback release gate {item_id} mode is invalid")
        if item.get("rollback_owner_required") is not True:
            raise ValueError(f"{label}: rollback release gate {item_id} must require rollback owner")
        if item.get("rollback_owner_confirmed") is not False or item.get("rollback_release_enabled") is not False:
            raise ValueError(f"{label}: rollback release gate {item_id} must stay unconfirmed and disabled")
        if item.get("status") not in {"ready_for_owner_review", "approval_required", "blocked_by_policy"}:
            raise ValueError(f"{label}: rollback release gate {item_id} status is invalid")


def _require_verification_holds(payload: dict[str, Any], label: str) -> None:
    items = payload.get("release_verification_holds") or []
    _require_count(items, 5, label, "release verification holds")
    for item in items:
        item_id = item.get("hold_id")
        if item.get("hold_mode") != "release_verification_hold":
            raise ValueError(f"{label}: release verification hold {item_id} mode is invalid")
        if item.get("owner_release_approved") is not False or item.get("maintenance_window_approved") is not False:
            raise ValueError(f"{label}: release verification hold {item_id} must stay unapproved")
        if item.get("release_verification_passed") is not False:
            raise ValueError(f"{label}: release verification hold {item_id} must stay unpassed")
        if item.get("status") not in {"ready_for_owner_review", "approval_required", "blocked_by_policy"}:
            raise ValueError(f"{label}: release verification hold {item_id} status is invalid")


def _require_live_apply_gates(payload: dict[str, Any], label: str) -> None:
    items = payload.get("live_apply_post_release_gates") or []
    _require_count(items, 5, label, "live apply post-release gates")
    for item in items:
        item_id = item.get("gate_id")
        if item.get("gate_mode") != "live_apply_post_release_gate":
            raise ValueError(f"{label}: live apply post-release gate {item_id} mode is invalid")
        if item.get("post_release_verifier_ready") is not False or item.get("live_apply_release_enabled") is not False:
            raise ValueError(f"{label}: live apply post-release gate {item_id} must stay held and disabled")
        if item.get("status") not in {"ready_for_owner_review", "approval_required", "blocked_by_policy"}:
            raise ValueError(f"{label}: live apply post-release gate {item_id} status is invalid")


def _require_blocked_transitions(payload: dict[str, Any], label: str) -> None:
    items = payload.get("blocked_post_release_transitions") or []
    _require_count(items, 6, label, "blocked post-release transitions")
    critical = 0
    for item in items:
        item_id = item.get("blocker_id")
        if item.get("status") not in {"approval_required", "blocked_by_policy"}:
            raise ValueError(f"{label}: blocked post-release transition {item_id} status is invalid")
        if item.get("severity") == "critical":
            critical += 1
        if not item.get("blocked_action") or not _is_redacted_sha256(item.get("evidence_hash")):
            raise ValueError(f"{label}: blocked post-release transition {item_id} must include action and redacted evidence_hash")
    if critical != 5:
        raise ValueError(f"{label}: expected 5 critical blocked post-release transitions, got {critical}")


def _require_actions(payload: dict[str, Any], label: str) -> None:
    items = payload.get("operator_actions") or []
    _require_ids(
        items,
        "action_id",
        {
            "review_post_release_verifier_gates",
            "verify_rollback_release_gate",
            "verify_release_verification_hold",
            "verify_live_apply_post_release_hold",
            "prepare_p2_133_final_release_candidate_readback",
        },
        label,
        "operator actions",
    )
    for item in items:
        if item.get("runtime_write_allowed") is not False:
            raise ValueError(f"{label}: operator action {item.get('action_id')} must keep runtime_write_allowed=false")
        if item.get("status") not in {"ready_for_operator_review", "approval_required", "blocked_by_policy"}:
            raise ValueError(f"{label}: operator action {item.get('action_id')} status is invalid")


def _require_display_redaction(payload: dict[str, Any], label: str) -> None:
    contract = payload.get("display_redaction_contract") or {}
    expected = {
        "redaction_required": True,
        "raw_prompt_display_allowed": False,
        "private_reasoning_display_allowed": False,
        "secret_value_display_allowed": False,
        "raw_runtime_payload_display_allowed": False,
        "internal_collaboration_content_display_allowed": False,
    }
    mismatches = _mismatches(contract, expected)
    if mismatches:
        raise ValueError(f"{label}: display_redaction_contract mismatch: {mismatches}")
    if not contract.get("frontend_display_policy"):
        raise ValueError(f"{label}: display_redaction_contract.frontend_display_policy is required")


def _require_no_forbidden_display_terms(payload: dict[str, Any], label: str) -> None:
    forbidden = {
        "work_window_transcript",
        "session_id",
        "browser_context",
        "authorization_header",
        "raw Telegram payload",
        "private reasoning",
        "raw prompt",
        "chain-of-thought",
        "批准！繼續",
        "My request for Codex",
        "In app browser",
    }
    text = json.dumps(payload, ensure_ascii=False)
    present = sorted(term for term in forbidden if term in text)
    if present:
        raise ValueError(f"{label}: forbidden display terms present: {present}")


def _require_rollup_consistency(payload: dict[str, Any], label: str) -> None:
    rollups = payload.get("rollups") or {}
    expected = {
        "post_release_verifier_gate_count": len(payload.get("post_release_verifier_gates") or []),
        "rollback_release_gate_count": len(payload.get("rollback_release_gates") or []),
        "release_verification_hold_count": len(payload.get("release_verification_holds") or []),
        "live_apply_post_release_gate_count": len(payload.get("live_apply_post_release_gates") or []),
        "blocked_post_release_transition_count": len(payload.get("blocked_post_release_transitions") or []),
        "operator_action_count": len(payload.get("operator_actions") or []),
        "approval_required_verifier_count": _count_status(payload.get("post_release_verifier_gates"), "approval_required"),
        "blocked_verifier_count": _count_status(payload.get("post_release_verifier_gates"), "blocked_by_policy"),
        "approval_required_rollback_count": _count_status(payload.get("rollback_release_gates"), "approval_required"),
        "blocked_rollback_count": _count_status(payload.get("rollback_release_gates"), "blocked_by_policy"),
        "approval_required_verification_hold_count": _count_status(payload.get("release_verification_holds"), "approval_required"),
        "blocked_verification_hold_count": _count_status(payload.get("release_verification_holds"), "blocked_by_policy"),
        "approval_required_live_apply_count": _count_status(payload.get("live_apply_post_release_gates"), "approval_required"),
        "blocked_live_apply_count": _count_status(payload.get("live_apply_post_release_gates"), "blocked_by_policy"),
        "critical_blocker_count": sum(1 for item in payload.get("blocked_post_release_transitions") or [] if item.get("severity") == "critical"),
    }
    zero_fields = {
        "owner_release_approved_count",
        "maintenance_window_approved_count",
        "rollback_owner_confirmed_count",
        "post_release_verifier_ready_count",
        "release_verification_pass_count",
        "rollback_release_pass_count",
        "live_apply_release_pass_count",
        "writer_apply_count",
        "execution_apply_count",
        "receipt_write_count",
        "reviewer_queue_write_count",
        "gateway_queue_write_count",
        "telegram_send_count",
        "bot_api_call_count",
        "report_receipt_write_count",
        "result_capture_write_count",
        "learning_write_count",
        "playbook_trust_write_count",
        "production_write_count",
        "secret_read_count",
        "destructive_operation_count",
    }
    expected.update({field: 0 for field in zero_fields})
    mismatches = _mismatches(rollups, expected)
    if mismatches:
        raise ValueError(f"{label}: rollup counts mismatch: {mismatches}")


def _mismatches(source: dict[str, Any], expected: dict[str, Any]) -> dict[str, dict[str, Any]]:
    return {key: {"expected": value, "actual": source.get(key)} for key, value in expected.items() if source.get(key) != value}


def _require_count(items: Any, expected_count: int, label: str, name: str) -> None:
    if not isinstance(items, list) or len(items) != expected_count:
        raise ValueError(f"{label}: expected {expected_count} {name}, got {len(items) if isinstance(items, list) else 'non-list'}")


def _require_ids(items: list[dict[str, Any]], id_field: str, expected_ids: set[str], label: str, name: str) -> None:
    _require_count(items, len(expected_ids), label, name)
    found = {str(item.get(id_field)) for item in items}
    if found != expected_ids:
        raise ValueError(f"{label}: {name} ids mismatch: expected={sorted(expected_ids)} actual={sorted(found)}")


def _count_status(items: Any, status: str) -> int:
    if not isinstance(items, list):
        return 0
    return sum(1 for item in items if isinstance(item, dict) and item.get("status") == status)


def _is_redacted_sha256(value: Any) -> bool:
    if not isinstance(value, str):
        return False
    prefix = "sha256:"
    return value.startswith(prefix) and len(value) == len(prefix) + 64
