"""HTTP boundary for secret-free external data-source management."""

import logging

from flask import g, jsonify, request

from app.api.data_source import bp
from app.core.connectors.errors import (
    ConnectorAuthenticationError,
    ConnectorConfigurationError,
    ConnectorError,
)
from app.core.data_source.errors import DataSourceError
from app.core.data_source.redaction import (
    redact_mapping,
    sanitize_exception,
)
from app.models.result import failed, success

logger = logging.getLogger(__name__)


def get_data_source_service():
    from app.core.data_source.runtime import get_data_source_manager
    from app.core.data_source.service import build_data_source_service

    return build_data_source_service(get_data_source_manager())


def _actor_uid():
    identity = getattr(g, "current_user", {}) or {}
    return identity.get("id") or identity.get("sub")


def _error_response(error):
    if isinstance(error, ConnectorError):
        logger.warning("连接器操作失败: category=%s", error.category)
        return jsonify(
            failed(
                "连接器操作失败",
                code=error.http_status,
                error={
                    "code": "CONNECTOR_ERROR",
                    "category": error.category,
                    "retryable": error.retryable,
                },
            )
        ), error.http_status
    if isinstance(error, DataSourceError):
        logger.warning(
            "数据源操作失败: code=%s message=%s",
            error.code,
            sanitize_exception(error),
        )
        return (
            jsonify(
                failed(
                    str(error),
                    code=error.http_status,
                    error={"code": error.code},
                )
            ),
            error.http_status,
        )
    logger.error(
        "数据源操作异常: %s",
        sanitize_exception(error),
    )
    return (
        jsonify(
            failed(
                "数据源操作失败",
                code=500,
                error={"code": "DATASOURCE_ERROR"},
            )
        ),
        500,
    )


@bp.route("/save", methods=["POST"])
def data_source_save():
    payload = request.get_json(silent=True) or {}
    logger.debug("保存数据源请求: %s", redact_mapping(payload))
    try:
        service = get_data_source_service()
        definition, created = service.save(
            payload,
            actor_uid=_actor_uid(),
        )
        status = 201 if created else 200
        return jsonify(success(service.serialize(definition))), status
    except Exception as error:
        return _error_response(error)


@bp.route("/list", methods=["POST"])
def data_source_list():
    payload = request.get_json(silent=True) or {}
    try:
        service = get_data_source_service()
        definitions = service.list(payload)
        items = [service.serialize(item) for item in definitions]
        return jsonify(success({"data_source": items, "total": len(items)})), 200
    except Exception as error:
        return _error_response(error)


@bp.route("/delete", methods=["POST"])
def data_source_delete():
    payload = request.get_json(silent=True) or {}
    logger.debug("删除数据源请求: %s", redact_mapping(payload))
    try:
        result = get_data_source_service().delete(
            payload.get("uid"),
            actor_uid=_actor_uid(),
        )
        return jsonify(success(result)), 200
    except Exception as error:
        return _error_response(error)


@bp.route("/conntest", methods=["POST"])
def data_source_conn_test():
    payload = request.get_json(silent=True) or {}
    logger.debug("测试数据源连接请求: %s", redact_mapping(payload))
    try:
        result = get_data_source_service().test_connection(payload)
        return jsonify(success(result)), 200
    except Exception as error:
        return _error_response(error)


@bp.route("/valid", methods=["POST"])
def data_source_connstr_valid():
    payload = request.get_json(silent=True) or {}
    logger.debug("验证数据源连接请求: %s", redact_mapping(payload))
    try:
        result = get_data_source_service().test_connection(payload)
        return jsonify(success({"exists": False, **result})), 200
    except Exception as error:
        return _error_response(error)


@bp.route("/parse", methods=["POST"])
def data_source_connstr_parse():
    return (
        jsonify(
            failed(
                "连接字符串快捷解析已停用",
                code=410,
                error={"code": "DATASOURCE_PARSE_RETIRED"},
            )
        ),
        410,
    )


@bp.route("/pools", methods=["GET"])
def data_source_pool_list():
    try:
        service = get_data_source_service()
        items = [
            service.serialize_pool_status(status) for status in service.pool_statuses()
        ]
        return jsonify(success({"pools": items, "total": len(items)})), 200
    except Exception as error:
        return _error_response(error)


@bp.route("/<data_source_uid>/pool", methods=["GET"])
def data_source_pool_status(data_source_uid):
    try:
        service = get_data_source_service()
        status = service.pool_status(data_source_uid)
        serializer = getattr(
            service,
            "serialize_pool_status",
            None,
        )
        data = (
            serializer(status)
            if serializer is not None
            else {
                "data_source_uid": status.data_source_uid,
                "credential_version": status.credential_version,
                "pool_state": status.pool_state,
                "pool_size": status.pool_size,
                "checked_out": status.checked_out,
                "checked_in": status.checked_in,
                "overflow": status.overflow,
                "leases": status.leases,
            }
        )
        return jsonify(success(data)), 200
    except Exception as error:
        return _error_response(error)


@bp.route("/<data_source_uid>/pool/invalidate", methods=["POST"])
def data_source_pool_invalidate(data_source_uid):
    payload = request.get_json(silent=True) or {}
    reason = payload.get("reason")
    if reason not in {
        "admin_reset",
        "configuration_changed",
        "credential_rotated",
    }:
        return (
            jsonify(
                failed(
                    "连接池失效原因无效",
                    code=400,
                    error={"code": "DATASOURCE_CONFIGURATION_INVALID"},
                )
            ),
            400,
        )
    try:
        result = get_data_source_service().invalidate_pool(
            data_source_uid,
            reason=reason,
            actor_uid=_actor_uid(),
        )
        return jsonify(success(result)), 200
    except Exception as error:
        return _error_response(error)


@bp.route("/graph", methods=["POST"])
def data_source_graph_relationship():
    from app import db
    from app.core.connectors.repository import ConnectorRepository

    payload = request.get_json(silent=True) or {}
    try:
        graph = ConnectorRepository(db.session).graph(
            source_uid=payload.get("source_uid"),
            business_domain_uid=payload.get("business_domain_uid"),
            process_key=payload.get("process_key"),
            run_uid=payload.get("run_uid"),
            limit=payload.get("limit", 500),
        )
        return jsonify(success(graph)), 200
    except Exception as error:
        return _error_response(error)


def _connector_registry():
    from flask import current_app

    from app.core.connectors.builtin import register_builtin_connectors
    from app.core.connectors.registry import ConnectorRegistry
    from app.core.connectors.secrets import EnvironmentSecretResolver
    from app.core.data_source.runtime import get_data_source_manager

    registry = current_app.extensions.get("connector_registry")
    if registry is not None:
        return registry
    registry = ConnectorRegistry()
    register_builtin_connectors(
        registry,
        connection_provider=get_data_source_manager().connect,
        secret_resolver=current_app.config.get("CONNECTOR_SECRET_RESOLVER")
        or EnvironmentSecretResolver(),
    )
    current_app.extensions["connector_registry"] = registry
    return registry


@bp.route("/connectors/manifests", methods=["GET"])
def connector_manifests():
    try:
        return jsonify(success({"manifests": _connector_registry().manifests()})), 200
    except Exception as error:
        return _error_response(error)


@bp.route("/connectors/config/validate", methods=["POST"])
def connector_config_validate():
    payload = request.get_json(silent=True) or {}
    try:
        config = _connector_registry().validate(
            payload.get("connector_id"), payload.get("version"), payload.get("config")
        )
        return jsonify(success({"valid": True, "config_keys": sorted(config)})), 200
    except Exception as error:
        return _error_response(error)


@bp.route("/connectors/<connector_id>/<version>/health", methods=["POST"])
def connector_health(connector_id, version):
    payload = request.get_json(silent=True) or {}
    try:
        connector = _connector_registry().resolve(connector_id, version)
        return jsonify(
            success(vars(connector.health(payload.get("config") or {})))
        ), 200
    except Exception as error:
        return _error_response(error)


@bp.route("/connectors/<connector_id>/<version>/compatibility", methods=["GET"])
def connector_compatibility(connector_id, version):
    try:
        connector = _connector_registry().resolve(connector_id, version)
        return jsonify(success(vars(connector.compatibility()))), 200
    except Exception as error:
        return _error_response(error)


@bp.route("/connectors/runs", methods=["GET"])
def connector_runs_list():
    from app import db
    from app.core.connectors.repository import ConnectorRepository

    try:
        repository = ConnectorRepository(db.session, _actor_uid())
        return jsonify(
            success({"runs": repository.list(request.args.get("limit", 100))})
        ), 200
    except Exception as error:
        db.session.rollback()
        return _error_response(error)


def _require_human_dry_run(payload):
    if payload.get("dry_run") is not True:
        raise ConnectorConfigurationError("human connector runs must use dry_run=true")


def _require_collection_operation(payload):
    if payload.get("operation") not in {
        "discover",
        "snapshot",
        "incremental",
        "lineage",
        "profile",
        "evidence",
    }:
        raise ConnectorConfigurationError("connector collection operation is invalid")


@bp.route("/connectors/runs", methods=["POST"])
def connector_run_create():
    from app import db
    from app.core.connectors.repository import ConnectorRepository

    try:
        repository = ConnectorRepository(
            db.session, _actor_uid(), run_access="human"
        )
        from dataclasses import asdict

        from app.core.connectors.runtime import ConnectorRuntime
        from app.core.connectors.sdk import OperationRequest

        payload = request.get_json(silent=True) or {}
        _require_human_dry_run(payload)
        _require_collection_operation(payload)
        registry = _connector_registry()
        for manifest in (
            registry.resolve(
                payload.get("connector_id"), payload.get("version")
            ).manifest,
        ):
            repository.register_manifest(manifest, _actor_uid())
        db.session.commit()
        operation_request = OperationRequest(
            source_uid=str(payload.get("source_uid") or ""),
            operation=str(payload.get("operation") or ""),
            config=payload.get("config") or {},
            scope=payload.get("scope") or {},
            cursor=payload.get("cursor") or {},
            checkpoint=payload.get("checkpoint") or {},
            idempotency_key=payload.get("idempotency_key"),
            dry_run=bool(payload.get("dry_run", False)),
            process_key=str(payload.get("process_key") or "dry-run"),
        )
        result = ConnectorRuntime(registry, store=repository).execute(
            payload.get("connector_id"), payload.get("version"), operation_request
        )
        return jsonify(success(asdict(result), code=201)), 201
    except Exception as error:
        db.session.rollback()
        return _error_response(error)


@bp.route("/connectors/machine/runs", methods=["POST"])
def connector_machine_run():
    """Machine-only run boundary; a human bearer token is never accepted here."""
    from app import db
    from app.core.connectors.identity import ConnectorIdentityRepository
    from app.core.connectors.repository import ConnectorRepository
    from app.core.connectors.runtime import ConnectorRuntime
    from app.core.connectors.sdk import OperationRequest

    payload = request.get_json(silent=True) or {}
    token = request.headers.get("X-Connector-Credential", "").strip()
    if not token:
        return _error_response(
            ConnectorAuthenticationError("machine credential is required")
        )
    try:
        for field in (
            "connector_id",
            "version",
            "source_uid",
            "business_domain_uid",
            "environment",
            "process_key",
            "operation",
        ):
            if not str(payload.get(field) or "").strip():
                raise ConnectorConfigurationError(
                    "machine connector binding is incomplete"
                )
        _require_collection_operation(payload)
        if "config" in payload:
            raise ConnectorConfigurationError(
                "machine connector config is supplied by the approved source binding"
            )
        identity = ConnectorIdentityRepository(db.session).authenticate(
            token,
            connector_id=str(payload.get("connector_id") or ""),
            connector_version=str(payload.get("version") or ""),
            source_uid=str(payload.get("source_uid") or ""),
            business_domain_uid=str(payload.get("business_domain_uid") or ""),
            environment=str(payload.get("environment") or ""),
            operation=str(payload.get("operation") or ""),
            scope=payload.get("scope") or {},
        )
        registry = _connector_registry()
        manifest = registry.resolve(
            payload.get("connector_id"), payload.get("version")
        ).manifest
        if not identity.get("source_binding_uid"):
            raise ConnectorConfigurationError(
                "machine connector principal has no approved source binding"
            )
        repository = ConnectorRepository(
            db.session,
            identity["principal_uid"],
            run_access="machine",
            principal_uid=identity["principal_uid"],
        )
        repository.register_manifest(manifest, identity["principal_uid"])
        db.session.commit()
        operation_request = OperationRequest(
            source_uid=str(payload.get("source_uid")),
            operation=str(payload.get("operation")),
            config=identity["approved_config"],
            scope=payload.get("scope") or {},
            cursor=payload.get("cursor") or {},
            checkpoint=payload.get("checkpoint") or {},
            idempotency_key=payload.get("idempotency_key"),
            dry_run=bool(payload.get("dry_run", False)),
            principal_uid=identity["principal_uid"],
            business_domain_uid=str(payload.get("business_domain_uid")),
            environment=str(payload.get("environment")),
            process_key=str(payload.get("process_key") or ""),
            source_binding_uid=identity["source_binding_uid"],
            source_binding_version=identity["source_binding_version"],
        )
        result = ConnectorRuntime(registry, store=repository).execute(
            payload.get("connector_id"), payload.get("version"), operation_request
        )
        from dataclasses import asdict

        return jsonify(success(asdict(result), code=201)), 201
    except Exception as error:
        db.session.rollback()
        return _error_response(error)


@bp.route("/connectors/runs/<idempotency_key>/cancel", methods=["POST"])
def connector_run_cancel(idempotency_key):
    from app import db
    from app.core.connectors.repository import ConnectorRepository
    from app.core.connectors.runtime import ConnectorRuntime

    try:
        result = ConnectorRuntime(
            _connector_registry(),
            store=ConnectorRepository(
                db.session, _actor_uid(), run_access="human"
            ),
        ).cancel(idempotency_key)
        return jsonify(success(result)), 200
    except Exception as error:
        db.session.rollback()
        return _error_response(error)


@bp.route("/connectors/runs/<idempotency_key>/resume", methods=["POST"])
def connector_run_resume(idempotency_key):
    from app import db
    from app.core.connectors.repository import ConnectorRepository
    from app.core.connectors.runtime import ConnectorRuntime

    try:
        result = ConnectorRuntime(
            _connector_registry(),
            store=ConnectorRepository(
                db.session, _actor_uid(), run_access="human"
            ),
        ).resume(idempotency_key)
        return jsonify(success(result)), 200
    except Exception as error:
        db.session.rollback()
        return _error_response(error)


def _machine_run_action(idempotency_key, action):
    from app import db
    from app.core.connectors.identity import ConnectorIdentityRepository
    from app.core.connectors.repository import ConnectorRepository
    from app.core.connectors.runtime import ConnectorRuntime

    token = request.headers.get("X-Connector-Credential", "").strip()
    if not token:
        return _error_response(
            ConnectorAuthenticationError("machine credential is required")
        )
    try:
        record = ConnectorRepository(db.session).get(idempotency_key)
        if not record or not record.get("principal_uid") or record.get("dry_run"):
            raise ConnectorConfigurationError("machine connector run was not found")
        identity = ConnectorIdentityRepository(db.session).authenticate(
            token,
            connector_id=record["connector_id"],
            connector_version=record["connector_version"],
            source_uid=record["source_uid"],
            business_domain_uid=record["business_domain_uid"],
            environment=record["environment"],
            operation=action,
            scope=record.get("scope") or {},
        )
        if (
            identity["principal_uid"] != record["principal_uid"]
            or identity.get("source_binding_uid") != record.get("source_binding_uid")
            or identity.get("source_binding_version")
            != record.get("source_binding_version")
        ):
            raise ConnectorAuthenticationError(
                "machine credential run binding was rejected"
            )
        repository = ConnectorRepository(
            db.session,
            identity["principal_uid"],
            run_access="machine",
            principal_uid=identity["principal_uid"],
        )
        runtime = ConnectorRuntime(_connector_registry(), store=repository)
        result = getattr(runtime, action)(idempotency_key)
        if action == "resume":
            from dataclasses import asdict

            result = asdict(result)
        return jsonify(success(result)), 200
    except Exception as error:
        db.session.rollback()
        return _error_response(error)


@bp.route(
    "/connectors/machine/runs/<idempotency_key>/cancel", methods=["POST"]
)
def connector_machine_run_cancel(idempotency_key):
    """Cancel one bound machine run with a fresh one-time credential."""
    return _machine_run_action(idempotency_key, "cancel")


@bp.route(
    "/connectors/machine/runs/<idempotency_key>/resume", methods=["POST"]
)
def connector_machine_run_resume(idempotency_key):
    """Resume one bound machine run with a fresh one-time credential."""
    return _machine_run_action(idempotency_key, "resume")


@bp.route("/connectors/source-bindings", methods=["GET"])
def connector_source_bindings_list():
    from app import db
    from app.core.connectors.bindings import ConnectorSourceBindingRepository

    try:
        items = ConnectorSourceBindingRepository(db.session).list_public(
            request.args.get("limit", 100)
        )
        return jsonify(success({"source_bindings": items})), 200
    except Exception as error:
        db.session.rollback()
        return _error_response(error)


@bp.route("/connectors/source-bindings", methods=["POST"])
def connector_source_binding_approve():
    from app import db
    from app.core.connectors.bindings import ConnectorSourceBindingRepository
    from app.core.connectors.repository import ConnectorRepository

    payload = request.get_json(silent=True) or {}
    try:
        registry = _connector_registry()
        manifest = registry.resolve(
            payload.get("connector_id"), payload.get("version")
        ).manifest
        approved_config = registry.validate(
            payload.get("connector_id"),
            payload.get("version"),
            payload.get("approved_config") or {},
        )
        ConnectorRepository(db.session, _actor_uid()).register_manifest(
            manifest, _actor_uid()
        )
        result = ConnectorSourceBindingRepository(db.session).approve(
            connector_id=payload.get("connector_id"),
            connector_version=payload.get("version"),
            source_uid=payload.get("source_uid"),
            business_domain_uid=payload.get("business_domain_uid"),
            environment=payload.get("environment"),
            approved_config=approved_config,
            approved_by=_actor_uid(),
            binding_uid=payload.get("binding_uid"),
        )
        return jsonify(success(result, code=201)), 201
    except Exception as error:
        db.session.rollback()
        return _error_response(error)


@bp.route("/connectors/source-bindings/<binding_uid>/revoke", methods=["POST"])
def connector_source_binding_revoke(binding_uid):
    from app import db
    from app.core.connectors.bindings import ConnectorSourceBindingRepository

    try:
        revoked = ConnectorSourceBindingRepository(db.session).revoke(
            binding_uid, _actor_uid()
        )
        return jsonify(success(revoked)), 200
    except Exception as error:
        db.session.rollback()
        return _error_response(error)


@bp.route("/connectors/principals", methods=["POST"])
def connector_principal_create():
    from app import db
    from app.core.connectors.identity import ConnectorIdentityRepository

    payload = request.get_json(silent=True) or {}
    try:
        _connector_registry().resolve(
            payload.get("connector_id"), payload.get("version", "1.0.0")
        )
        uid = ConnectorIdentityRepository(db.session).create_principal(
            connector_id=payload.get("connector_id"),
            connector_version=payload.get("version", "1.0.0"),
            source_uid=payload.get("source_uid"),
            business_domain_uid=payload.get("business_domain_uid"),
            environment=payload.get("environment"),
            operations=payload.get("operations") or (),
            scopes=payload.get("scopes") or {},
            actor_uid=_actor_uid(),
            source_binding_uid=payload.get("source_binding_uid"),
            source_binding_version=payload.get("source_binding_version"),
        )
        return jsonify(success({"principal_uid": uid}, code=201)), 201
    except Exception as error:
        db.session.rollback()
        return _error_response(error)


@bp.route("/connectors/principals/<principal_uid>/credentials", methods=["POST"])
def connector_credential_issue(principal_uid):
    from app import db
    from app.core.connectors.identity import ConnectorIdentityRepository

    payload = request.get_json(silent=True) or {}
    try:
        result = ConnectorIdentityRepository(db.session).issue(
            principal_uid,
            ttl_seconds=payload.get("ttl_seconds", 900),
            actor_uid=_actor_uid(),
        )
        response = jsonify(success(result, code=201))
        response.headers["Cache-Control"] = "no-store"
        return response, 201
    except Exception as error:
        db.session.rollback()
        return _error_response(error)


@bp.route("/connectors/credentials/<credential_uid>/<action>", methods=["POST"])
def connector_credential_action(credential_uid, action):
    from app import db
    from app.core.connectors.identity import ConnectorIdentityRepository

    payload = request.get_json(silent=True) or {}
    try:
        repository = ConnectorIdentityRepository(db.session)
        if action == "revoke":
            result = {"revoked": repository.revoke(credential_uid, _actor_uid())}
        elif action == "rotate":
            result = repository.rotate(
                credential_uid,
                ttl_seconds=payload.get("ttl_seconds", 900),
                actor_uid=_actor_uid(),
            )
        else:
            raise ConnectorConfigurationError("credential action is invalid")
        response = jsonify(success(result))
        response.headers["Cache-Control"] = "no-store"
        return response, 200
    except Exception as error:
        db.session.rollback()
        return _error_response(error)