"""Service-readiness contracts, config, health, and conformance helpers."""

from __future__ import annotations

from dataclasses import dataclass, field
from typing import Any

from .adapters import (
    AllowAllPolicyGateway,
    InMemoryMemoryEventLog,
    InMemoryMemoryGraphStore,
    InMemoryRuntimeRegistry,
    InMemorySemanticIndex,
    NoopContextPackageCompiler,
    RecordingAuditSink,
)
from .models import Diagnostic, MemoryEvent, MemoryNode, PolicyDecision, ProfileIntent
from .runtime import PhaseMemoryRuntime

SERVICE_CONTRACT_SCHEMA = "phase_memory.service.contracts.v1"
HEALTH_REPORT_SCHEMA = "phase_memory.health.report.v1"
KONTEXTUAL_DELEGATION_SCHEMA = "phase_memory.kontextual.delegation.v1"


SERVICE_OPERATIONS = {
    "profile.plan": {"request": ["profile"], "response": "runtime_envelope"},
    "graph.import": {"request": ["graph"], "response": "runtime_envelope"},
    "graph.lifecycle.plan": {"request": ["graph", "parameters"], "response": "runtime_envelope"},
    "lifecycle.apply": {"request": ["actions", "review_record"], "response": "runtime_envelope"},
    "graph.activation.plan": {"request": ["graph", "budget"], "response": "runtime_envelope"},
    "package.compile": {"request": ["selection"], "response": "runtime_envelope"},
    "audit.query": {"request": ["filters"], "response": "audit_events"},
    "health.check": {"request": [], "response": "health_report"},
}


@dataclass(frozen=True)
class RuntimeConfig:
    local_store_path: str = ".phase-memory-local"
    adapter_registry: dict[str, str] = field(default_factory=lambda: {"graph_store": "memory", "event_log": "memory"})
    policy_mode: str = "allow-all"
    audit_sink_mode: str = "recording"
    package_compiler_mode: str = "noop"
    semantic_index_mode: str = "disabled"
    dry_run_default: bool = True
    trust_zone_labels: tuple[str, ...] = ("local",)

    @classmethod
    def local_default(cls) -> "RuntimeConfig":
        return cls()

    def diagnostics(self) -> tuple[Diagnostic, ...]:
        diagnostics: list[Diagnostic] = []
        if not self.local_store_path:
            diagnostics.append(Diagnostic("error", "missing_store_path", "Runtime config requires a local store path.", "local_store_path"))
        if self.policy_mode not in {"allow-all", "external"}:
            diagnostics.append(Diagnostic("error", "unsupported_policy_mode", "Unsupported policy mode.", "policy_mode", {"policy_mode": self.policy_mode}))
        if self.semantic_index_mode not in {"disabled", "external"}:
            diagnostics.append(Diagnostic("error", "unsupported_semantic_index_mode", "Unsupported semantic index mode.", "semantic_index_mode", {"semantic_index_mode": self.semantic_index_mode}))
        return tuple(diagnostics)

    def to_dict(self) -> dict[str, Any]:
        return {
            "local_store_path": self.local_store_path,
            "adapter_registry": dict(self.adapter_registry),
            "policy_mode": self.policy_mode,
            "audit_sink_mode": self.audit_sink_mode,
            "package_compiler_mode": self.package_compiler_mode,
            "semantic_index_mode": self.semantic_index_mode,
            "dry_run_default": self.dry_run_default,
            "trust_zone_labels": list(self.trust_zone_labels),
        }


def service_contracts() -> dict[str, Any]:
    return {"schema_version": SERVICE_CONTRACT_SCHEMA, "operations": SERVICE_OPERATIONS}


def runtime_from_config(config: RuntimeConfig | None = None) -> PhaseMemoryRuntime:
    config = config or RuntimeConfig.local_default()
    # First service-ready slice keeps adapters dependency-light. External
    # adapter resolution belongs behind the registry in later deployments.
    return PhaseMemoryRuntime()


def health_report(runtime: PhaseMemoryRuntime, *, config: RuntimeConfig | None = None) -> dict[str, Any]:
    config = config or RuntimeConfig.local_default()
    nodes = runtime.graph_store.list_nodes()
    stale = [node for node in nodes if node.lifecycle.value == "stale"]
    pending_review = [node for node in nodes if node.lifecycle.value == "review_needed"]
    diagnostics = list(config.diagnostics())
    return {
        "schema_version": HEALTH_REPORT_SCHEMA,
        "ok": not any(diagnostic.severity == "error" for diagnostic in diagnostics),
        "adapters": {
            "graph_store": runtime.graph_store.__class__.__name__,
            "event_log": runtime.event_log.__class__.__name__,
            "policy_gateway": runtime.policy_gateway.__class__.__name__,
            "audit_sink": runtime.audit_sink.__class__.__name__,
            "package_compiler": runtime.package_compiler.__class__.__name__,
        },
        "config": config.to_dict(),
        "store": {
            "node_count": len(nodes),
            "stale_memory_count": len(stale),
            "pending_review_count": len(pending_review),
        },
        "diagnostics": [diagnostic.to_dict() for diagnostic in diagnostics],
    }


class LocalServiceRunner:
    """Minimal optional service runner shape without web framework dependency."""

    def __init__(self, runtime: PhaseMemoryRuntime | None = None, config: RuntimeConfig | None = None) -> None:
        self.config = config or RuntimeConfig.local_default()
        self.runtime = runtime or runtime_from_config(self.config)

    def handle(self, operation: str, payload: dict[str, Any] | None = None) -> dict[str, Any]:
        payload = payload or {}
        if operation == "health.check":
            return health_report(self.runtime, config=self.config)
        if operation == "profile.plan":
            return self.runtime.plan_profile(payload["profile"], source_ref=payload.get("source_ref", "service"))
        if operation == "graph.import":
            return self.runtime.import_graph(payload["graph"], source_ref=payload.get("source_ref", "service"))
        if operation == "graph.activation.plan":
            budget = payload.get("budget", {})
            return self.runtime.plan_activation(
                payload["graph"],
                max_items=int(budget["max_items"]),
                max_tokens=int(budget["max_tokens"]),
                profile_id=payload.get("profile_id"),
            )
        raise ValueError(f"Unsupported service operation: {operation}")


def kontextual_delegation_envelope(
    *,
    operation: str,
    graph_id: str = "",
    profile_id: str = "",
    policy_decision: dict[str, Any] | None = None,
    audit_ref: str = "",
) -> dict[str, Any]:
    return {
        "schema_version": KONTEXTUAL_DELEGATION_SCHEMA,
        "operation": operation,
        "phase_memory_owns": ["phase_policy", "lifecycle_planning", "activation_planning"],
        "kontextual_owns": ["durable_records", "permission_aware_retrieval", "long_lived_storage"],
        "graph_id": graph_id,
        "profile_id": profile_id,
        "policy_decision": dict(policy_decision or {}),
        "audit_ref": audit_ref,
        "imports": {"avoid_circular_imports": True, "exchange": "json_envelopes"},
    }


def assert_graph_store_conformance(store) -> None:
    profile = ProfileIntent(profile_id="conformance-profile")
    node = MemoryNode("node.conformance", "decision", "Conformance node")
    store.save_profile(profile)
    store.save_node(node)
    assert store.get_profile(profile.profile_id).profile_id == profile.profile_id
    assert store.get_node(node.node_id).node_id == node.node_id
    assert store.list_nodes(kind="decision")


def assert_event_log_conformance(log) -> None:
    event = MemoryEvent("event.conformance", "recorded")
    log.append(event)
    assert log.list_events(kind="recorded")[0].event_id == event.event_id


def assert_context_compiler_conformance(compiler) -> None:
    response = compiler.compile_selection({"id": "selection.conformance", "nodes": [], "events": []})
    assert "package_id" in response or "package_ref" in response


def assert_policy_gateway_conformance(gateway) -> None:
    decision = gateway.authorize(action="read", resource="node.conformance")
    assert isinstance(decision, PolicyDecision)


def assert_audit_sink_conformance(sink) -> None:
    receipt = sink.record({"operation": "conformance"})
    assert receipt.get("recorded") is True


def assert_semantic_index_conformance(index) -> None:
    node = MemoryNode("node.semantic", "decision", "Conformance search target", metadata={"graph_id": "graph.conformance"})
    receipt = index.upsert_nodes([node])
    results = index.query(graph_id="graph.conformance", query="search target", limit=5)
    assert receipt.get("upserted") == 1
    assert results and results[0]["id"] == node.node_id


def assert_runtime_registry_conformance(registry) -> None:
    envelope = {"operation_id": "op.conformance", "operation": "conformance"}
    receipt = registry.publish_runtime_envelope(envelope)
    fetched = registry.fetch_runtime_envelope(receipt["reference"])
    assert receipt["published"] is True
    assert fetched["operation_id"] == "op.conformance"


def default_conformance_adapters() -> dict[str, Any]:
    return {
        "graph_store": InMemoryMemoryGraphStore(),
        "event_log": InMemoryMemoryEventLog(),
        "context_compiler": NoopContextPackageCompiler(),
        "policy_gateway": AllowAllPolicyGateway(),
        "audit_sink": RecordingAuditSink(),
        "semantic_index": InMemorySemanticIndex(),
        "runtime_registry": InMemoryRuntimeRegistry(),
    }