use std::path::PathBuf;

use mcpaas_core::{
    AuthConfig, AuthKind, AuthProfile, AuthProfileId, ConfigExport, ExportMode, GeneratedDraft,
    GeneratedDraftStatus, OperationId, OperationStatus, Protocol, SampleId, Samples, Target,
};
use mcpaas_mapping::{JsonPathRoot, MappingSet, infer_mapping_from_samples};
use mcpaas_proto::{ProtoService, services_from_descriptor_set_bytes};
use mcpaas_registry::{
    CreateVersionRequest, OperationSampleMetadata, OperationSummary, OperationVersionRecord,
    PostgresRegistry, PublishRequest, RegistryOperation, SampleKind, SaveAuthProfileRequest,
    SaveDescriptorMetadataRequest, SaveSampleMetadataRequest,
};
use mcpaas_runtime::{PreparedRequest, RuntimeError, RuntimeExecutor, RuntimeOperation};
use mcpaas_schema::Schema;
use serde::{Deserialize, Serialize};
use serde_json::{Value, json};
use time::{OffsetDateTime, format_description::well_known::Rfc3339};
use tracing::{info, instrument};
use uuid::Uuid;

use crate::{error::ApiError, storage::LocalArtifactStorage};

#[derive(Clone)]
pub struct AdminService {
    registry: PostgresRegistry,
    runtime: RuntimeExecutor,
    storage: LocalArtifactStorage,
}

#[derive(Clone, Debug, Deserialize, Serialize)]
pub struct OperationPayload {
    pub name: String,
    pub display_name: String,
    pub protocol: Protocol,
    pub target: Target,
    pub input_schema: Schema,
    pub output_schema: Schema,
    pub input_mapping: MappingSet,
    pub output_mapping: MappingSet,
    pub execution_config: mcpaas_core::ExecutionConfig,
    pub tool_description: mcpaas_core::ToolDescription,
}

#[derive(Clone, Debug, Deserialize)]
pub struct NewVersionPayload {
    #[serde(flatten)]
    pub operation: OperationPayload,
    #[serde(default)]
    pub change_note: Option<String>,
}

#[derive(Clone, Debug, Deserialize)]
pub struct PublishPayload {
    pub version: u32,
}

#[derive(Clone, Debug, Deserialize)]
pub struct TestRunPayload {
    pub version: u32,
    pub input: Value,
}

#[derive(Clone, Debug, Serialize)]
pub struct TestRunResult {
    pub ok: bool,
    pub request_preview: Value,
    pub response_preview: Value,
    pub errors: Vec<Value>,
}

#[derive(Clone, Debug, Deserialize)]
pub struct AuthProfilePayload {
    pub name: String,
    pub kind: AuthKind,
    pub config: AuthConfig,
}

#[derive(Clone, Debug, Deserialize)]
pub struct GenerateDraftPayload {
    #[serde(default)]
    pub sources: Vec<String>,
}

#[derive(Clone, Debug, Serialize)]
pub struct DraftGenerationResult {
    pub generated_draft: GeneratedDraft,
    pub input_schema: Schema,
    pub output_schema: Schema,
    pub input_mapping: MappingSet,
    pub output_mapping: MappingSet,
}

#[derive(Clone, Debug, Deserialize)]
pub struct ImportQuery {
    #[serde(default)]
    pub mode: ImportMode,
}

#[derive(Clone, Copy, Debug, Default, Deserialize, Serialize)]
#[serde(rename_all = "snake_case")]
pub enum ImportMode {
    #[default]
    Create,
    Upsert,
}

#[derive(Clone, Debug, Deserialize)]
pub struct ExportQuery {
    pub version: Option<u32>,
    #[serde(default = "default_export_mode")]
    pub mode: ExportMode,
}

#[derive(Clone, Debug, Deserialize, Serialize)]
pub struct YamlOperationDocument {
    pub format_version: String,
    pub kind: String,
    pub operation: RegistryOperation,
}

#[derive(Clone, Debug, Serialize)]
pub struct CreatedOperationResponse {
    pub operation_id: String,
    pub version: u32,
    pub status: OperationStatus,
}

#[derive(Clone, Debug, Serialize)]
pub struct PublishResponse {
    pub operation_id: String,
    pub published_version: u32,
    pub published_at: String,
}

#[derive(Clone, Debug, Serialize)]
pub struct ImportResponse {
    pub operation_id: String,
    pub version: u32,
    pub import_mode: ImportMode,
    pub warnings: Vec<String>,
}

#[derive(Clone, Debug, Serialize)]
pub struct DescriptorUploadResponse {
    pub descriptor_id: String,
    pub version: u32,
}

#[derive(Clone, Debug, Serialize)]
pub struct GrpcServiceSummary {
    pub package: String,
    pub service: String,
    pub methods: Vec<GrpcMethodSummary>,
}

#[derive(Clone, Debug, Serialize)]
pub struct GrpcMethodSummary {
    pub name: String,
    pub kind: String,
    pub input_schema: Schema,
    pub output_schema: Schema,
}

impl AdminService {
    pub fn new(registry: PostgresRegistry, storage_root: PathBuf) -> Self {
        Self {
            registry,
            runtime: RuntimeExecutor::new(),
            storage: LocalArtifactStorage::new(storage_root),
        }
    }

    #[instrument(skip(self))]
    pub async fn list_operations(&self) -> Result<Vec<OperationSummary>, ApiError> {
        Ok(self.registry.list_operations().await?)
    }

    #[instrument(skip(self))]
    pub async fn get_operation(
        &self,
        operation_id: &OperationId,
    ) -> Result<OperationSummary, ApiError> {
        self.registry
            .get_operation_summary(operation_id)
            .await?
            .ok_or_else(|| {
                ApiError::not_found(format!("operation {} was not found", operation_id.as_str()))
            })
    }

    #[instrument(skip(self))]
    pub async fn get_operation_version(
        &self,
        operation_id: &OperationId,
        version: u32,
    ) -> Result<OperationVersionRecord, ApiError> {
        self.registry
            .get_operation_version(operation_id, version)
            .await?
            .ok_or_else(|| {
                ApiError::not_found(format!(
                    "operation version {version} for {} was not found",
                    operation_id.as_str()
                ))
            })
    }

    #[instrument(skip(self, payload), fields(protocol = ?payload.protocol, operation_name = %payload.name))]
    pub async fn create_operation(
        &self,
        payload: OperationPayload,
    ) -> Result<CreatedOperationResponse, ApiError> {
        self.validate_operation_payload(&payload)?;

        if self.find_operation_by_name(&payload.name).await?.is_some() {
            return Err(ApiError::conflict(format!(
                "operation with name {} already exists",
                payload.name
            )));
        }

        let now = now_string()?;
        let operation_id = OperationId::new(new_prefixed_id("op"));
        let snapshot = RegistryOperation {
            id: operation_id.clone(),
            name: payload.name,
            display_name: payload.display_name,
            protocol: payload.protocol,
            status: OperationStatus::Draft,
            version: 1,
            target: payload.target,
            input_schema: payload.input_schema,
            output_schema: payload.output_schema,
            input_mapping: payload.input_mapping,
            output_mapping: payload.output_mapping,
            execution_config: payload.execution_config,
            tool_description: payload.tool_description,
            samples: Some(Samples::default()),
            generated_draft: None,
            config_export: Some(ConfigExport {
                format_version: "1".to_owned(),
                export_mode: ExportMode::Portable,
            }),
            created_at: now.clone(),
            updated_at: now,
            published_at: None,
        };

        self.registry.create_operation(&snapshot, None).await?;
        info!(operation_id = %operation_id.as_str(), version = 1, "operation created");

        Ok(CreatedOperationResponse {
            operation_id: operation_id.as_str().to_owned(),
            version: 1,
            status: OperationStatus::Draft,
        })
    }

    #[instrument(skip(self, payload), fields(operation_id = %operation_id.as_str(), protocol = ?payload.operation.protocol))]
    pub async fn create_version(
        &self,
        operation_id: &OperationId,
        payload: NewVersionPayload,
    ) -> Result<CreatedOperationResponse, ApiError> {
        self.validate_operation_payload(&payload.operation)?;

        let summary = self.get_operation(operation_id).await?;
        let now = now_string()?;
        let version = summary.current_draft_version + 1;
        let snapshot = RegistryOperation {
            id: operation_id.clone(),
            name: payload.operation.name,
            display_name: payload.operation.display_name,
            protocol: payload.operation.protocol,
            status: OperationStatus::Draft,
            version,
            target: payload.operation.target,
            input_schema: payload.operation.input_schema,
            output_schema: payload.operation.output_schema,
            input_mapping: payload.operation.input_mapping,
            output_mapping: payload.operation.output_mapping,
            execution_config: payload.operation.execution_config,
            tool_description: payload.operation.tool_description,
            samples: Some(Samples::default()),
            generated_draft: None,
            config_export: Some(ConfigExport {
                format_version: "1".to_owned(),
                export_mode: ExportMode::Portable,
            }),
            created_at: summary.created_at,
            updated_at: now,
            published_at: None,
        };

        self.registry
            .create_version(CreateVersionRequest {
                snapshot: &snapshot,
                change_note: payload.change_note.as_deref(),
                created_by: None,
            })
            .await?;
        info!(operation_id = %operation_id.as_str(), version, "operation version created");

        Ok(CreatedOperationResponse {
            operation_id: operation_id.as_str().to_owned(),
            version,
            status: OperationStatus::Draft,
        })
    }

    #[instrument(skip(self), fields(operation_id = %operation_id.as_str(), version))]
    pub async fn publish_operation(
        &self,
        operation_id: &OperationId,
        version: u32,
    ) -> Result<PublishResponse, ApiError> {
        let published_at = now_string()?;
        self.registry
            .publish_operation(PublishRequest {
                operation_id,
                version,
                published_at: &published_at,
                published_by: None,
            })
            .await?;
        info!(operation_id = %operation_id.as_str(), version, "operation published");

        Ok(PublishResponse {
            operation_id: operation_id.as_str().to_owned(),
            published_version: version,
            published_at,
        })
    }

    #[instrument(skip(self, payload), fields(operation_id = %operation_id.as_str(), version = payload.version))]
    pub async fn run_test(
        &self,
        operation_id: &OperationId,
        payload: TestRunPayload,
    ) -> Result<TestRunResult, ApiError> {
        let record = self
            .get_operation_version(operation_id, payload.version)
            .await?;
        let runtime = RuntimeOperation::from(record.snapshot.clone());
        let request_preview =
            match build_request_preview(&record.snapshot.input_mapping, &payload.input) {
                Ok(preview) => preview,
                Err(error) => {
                    return Ok(TestRunResult {
                        ok: false,
                        request_preview: Value::Null,
                        response_preview: Value::Null,
                        errors: vec![crate::error::runtime_test_failure(&RuntimeError::Mapping(
                            error,
                        ))],
                    });
                }
            };

        match self.runtime.execute(&runtime, &payload.input).await {
            Ok(output) => Ok(TestRunResult {
                ok: true,
                request_preview,
                response_preview: output,
                errors: Vec::new(),
            }),
            Err(error) => Ok(TestRunResult {
                ok: false,
                request_preview,
                response_preview: Value::Null,
                errors: vec![crate::error::runtime_test_failure(&error)],
            }),
        }
    }

    #[instrument(skip(self))]
    pub async fn list_auth_profiles(&self) -> Result<Vec<AuthProfile>, ApiError> {
        Ok(self.registry.list_auth_profiles().await?)
    }

    #[instrument(skip(self, payload), fields(operation_id = %operation_id.as_str(), source_name = source_name.unwrap_or("descriptor-set.bin")))]
    pub async fn upload_descriptor_set(
        &self,
        operation_id: &OperationId,
        source_name: Option<&str>,
        payload: &[u8],
    ) -> Result<DescriptorUploadResponse, ApiError> {
        let summary = self.get_operation(operation_id).await?;
        if summary.protocol != Protocol::Grpc {
            return Err(ApiError::validation(
                "descriptor upload is only allowed for grpc operations",
            ));
        }

        let services = services_from_descriptor_set_bytes(payload)
            .map_err(|error| ApiError::validation(error.to_string()))?;
        let descriptor_id = mcpaas_core::DescriptorId::new(new_prefixed_id("desc"));
        let storage_ref = self
            .storage
            .write_descriptor(
                operation_id,
                summary.current_draft_version,
                mcpaas_registry::DescriptorKind::DescriptorSet,
                &descriptor_id,
                source_name,
                payload,
            )
            .await?;

        self.registry
            .save_descriptor_metadata(SaveDescriptorMetadataRequest {
                descriptor: &mcpaas_registry::DescriptorMetadata {
                    id: descriptor_id.clone(),
                    operation_id: Some(operation_id.clone()),
                    version: Some(summary.current_draft_version),
                    descriptor_kind: mcpaas_registry::DescriptorKind::DescriptorSet,
                    storage_ref,
                    source_name: source_name.map(ToOwned::to_owned),
                    package_index: Some(
                        serde_json::to_value(&services)
                            .map_err(|error| ApiError::internal(error.to_string()))?,
                    ),
                    created_at: now_string()?,
                },
            })
            .await?;
        info!(
            operation_id = %operation_id.as_str(),
            descriptor_id = %descriptor_id.as_str(),
            version = summary.current_draft_version,
            "descriptor set uploaded"
        );

        Ok(DescriptorUploadResponse {
            descriptor_id: descriptor_id.as_str().to_owned(),
            version: summary.current_draft_version,
        })
    }

    #[instrument(skip(self, payload), fields(operation_id = %operation_id.as_str(), source_name = source_name.unwrap_or("schema.proto")))]
    pub async fn upload_proto_file(
        &self,
        operation_id: &OperationId,
        source_name: Option<&str>,
        payload: &[u8],
    ) -> Result<DescriptorUploadResponse, ApiError> {
        let summary = self.get_operation(operation_id).await?;
        if summary.protocol != Protocol::Grpc {
            return Err(ApiError::validation(
                "proto upload is only allowed for grpc operations",
            ));
        }

        let descriptor_id = mcpaas_core::DescriptorId::new(new_prefixed_id("desc"));
        let storage_ref = self
            .storage
            .write_descriptor(
                operation_id,
                summary.current_draft_version,
                mcpaas_registry::DescriptorKind::ProtoUpload,
                &descriptor_id,
                source_name,
                payload,
            )
            .await?;

        self.registry
            .save_descriptor_metadata(SaveDescriptorMetadataRequest {
                descriptor: &mcpaas_registry::DescriptorMetadata {
                    id: descriptor_id.clone(),
                    operation_id: Some(operation_id.clone()),
                    version: Some(summary.current_draft_version),
                    descriptor_kind: mcpaas_registry::DescriptorKind::ProtoUpload,
                    storage_ref,
                    source_name: source_name.map(ToOwned::to_owned),
                    package_index: None,
                    created_at: now_string()?,
                },
            })
            .await?;
        info!(
            operation_id = %operation_id.as_str(),
            descriptor_id = %descriptor_id.as_str(),
            version = summary.current_draft_version,
            "proto file uploaded"
        );

        Ok(DescriptorUploadResponse {
            descriptor_id: descriptor_id.as_str().to_owned(),
            version: summary.current_draft_version,
        })
    }

    #[instrument(skip(self), fields(operation_id = %operation_id.as_str(), version))]
    pub async fn list_grpc_services(
        &self,
        operation_id: &OperationId,
        version: Option<u32>,
    ) -> Result<Vec<GrpcServiceSummary>, ApiError> {
        let summary = self.get_operation(operation_id).await?;
        if summary.protocol != Protocol::Grpc {
            return Err(ApiError::validation(
                "grpc services are only available for grpc operations",
            ));
        }

        let version = version.unwrap_or(summary.current_draft_version);
        let descriptor = self
            .registry
            .list_descriptor_metadata(operation_id, version)
            .await?
            .into_iter()
            .rev()
            .find(|descriptor| {
                descriptor.descriptor_kind == mcpaas_registry::DescriptorKind::DescriptorSet
            })
            .ok_or_else(|| ApiError::not_found("descriptor set was not uploaded"))?;
        let bytes = self.storage.read_bytes(&descriptor.storage_ref).await?;
        let services = services_from_descriptor_set_bytes(&bytes)
            .map_err(|error| ApiError::validation(error.to_string()))?;

        services
            .into_iter()
            .map(proto_service_summary)
            .collect::<Result<Vec<_>, _>>()
    }

    #[instrument(skip(self))]
    pub async fn get_auth_profile(
        &self,
        auth_profile_id: &AuthProfileId,
    ) -> Result<AuthProfile, ApiError> {
        self.registry
            .get_auth_profile(auth_profile_id)
            .await?
            .ok_or_else(|| {
                ApiError::not_found(format!(
                    "auth profile {} was not found",
                    auth_profile_id.as_str()
                ))
            })
    }

    #[instrument(skip(self, payload), fields(auth_profile_name = %payload.name, auth_kind = ?payload.kind))]
    pub async fn create_auth_profile(
        &self,
        payload: AuthProfilePayload,
    ) -> Result<AuthProfile, ApiError> {
        validate_auth_profile_kind(payload.kind, &payload.config)?;

        let now = now_string()?;
        let profile = AuthProfile {
            id: AuthProfileId::new(new_prefixed_id("auth")),
            name: payload.name,
            kind: payload.kind,
            config: payload.config,
            created_at: now.clone(),
            updated_at: now,
        };

        self.registry
            .save_auth_profile(SaveAuthProfileRequest { profile: &profile })
            .await?;
        info!(auth_profile_id = %profile.id.as_str(), "auth profile created");

        Ok(profile)
    }

    #[instrument(skip(self), fields(operation_id = %operation_id.as_str(), version = query.version.unwrap_or_default(), mode = ?query.mode))]
    pub async fn export_operation(
        &self,
        operation_id: &OperationId,
        query: ExportQuery,
    ) -> Result<String, ApiError> {
        let version = match query.version {
            Some(version) => version,
            None => {
                self.get_operation(operation_id)
                    .await?
                    .current_draft_version
            }
        };
        let record = self.get_operation_version(operation_id, version).await?;
        let document = YamlOperationDocument {
            format_version: "1".to_owned(),
            kind: "operation".to_owned(),
            operation: RegistryOperation {
                config_export: Some(ConfigExport {
                    format_version: "1".to_owned(),
                    export_mode: query.mode,
                }),
                ..record.snapshot
            },
        };

        serde_yaml::to_string(&document).map_err(|error| ApiError::internal(error.to_string()))
    }

    #[instrument(skip(self, yaml_document), fields(mode = ?query.mode))]
    pub async fn import_operation(
        &self,
        query: ImportQuery,
        yaml_document: &str,
    ) -> Result<ImportResponse, ApiError> {
        let document: YamlOperationDocument = serde_yaml::from_str(yaml_document)
            .map_err(|error| ApiError::validation(error.to_string()))?;
        if document.kind != "operation" {
            return Err(ApiError::validation("yaml kind must be operation"));
        }

        let payload = OperationPayload {
            name: document.operation.name.clone(),
            display_name: document.operation.display_name.clone(),
            protocol: document.operation.protocol,
            target: document.operation.target.clone(),
            input_schema: document.operation.input_schema.clone(),
            output_schema: document.operation.output_schema.clone(),
            input_mapping: document.operation.input_mapping.clone(),
            output_mapping: document.operation.output_mapping.clone(),
            execution_config: document.operation.execution_config.clone(),
            tool_description: document.operation.tool_description.clone(),
        };

        match query.mode {
            ImportMode::Create => {
                let created = self.create_operation(payload).await?;
                Ok(ImportResponse {
                    operation_id: created.operation_id,
                    version: created.version,
                    import_mode: ImportMode::Create,
                    warnings: Vec::new(),
                })
            }
            ImportMode::Upsert => {
                if let Some(existing) = self
                    .find_operation_by_name(&document.operation.name)
                    .await?
                {
                    let created = self
                        .create_version(
                            &existing.id,
                            NewVersionPayload {
                                operation: payload,
                                change_note: Some("yaml upsert".to_owned()),
                            },
                        )
                        .await?;

                    let response = ImportResponse {
                        operation_id: created.operation_id,
                        version: created.version,
                        import_mode: ImportMode::Upsert,
                        warnings: Vec::new(),
                    };
                    info!(
                        operation_id = %response.operation_id,
                        version = response.version,
                        "operation imported by upsert"
                    );
                    Ok(response)
                } else {
                    let created = self.create_operation(payload).await?;
                    let response = ImportResponse {
                        operation_id: created.operation_id,
                        version: created.version,
                        import_mode: ImportMode::Upsert,
                        warnings: Vec::new(),
                    };
                    info!(
                        operation_id = %response.operation_id,
                        version = response.version,
                        "operation imported by upsert"
                    );
                    Ok(response)
                }
            }
        }
    }

    #[instrument(skip(self, payload), fields(operation_id = %operation_id.as_str(), sample_kind = ?sample_kind))]
    pub async fn save_json_sample(
        &self,
        operation_id: &OperationId,
        sample_kind: SampleKind,
        payload: &Value,
    ) -> Result<OperationSampleMetadata, ApiError> {
        let summary = self.get_operation(operation_id).await?;
        let version = summary.current_draft_version;
        let sample_id = SampleId::new(new_prefixed_id("sample"));
        let now = now_string()?;
        let file_name = match sample_kind {
            SampleKind::InputJson => "input.json",
            SampleKind::OutputJson => "output.json",
            SampleKind::YamlImportSource => "source.yaml",
        };
        let storage_ref = self
            .storage
            .write_json_sample(operation_id, version, sample_kind, &sample_id, payload)
            .await?;
        let metadata = OperationSampleMetadata {
            id: sample_id,
            operation_id: operation_id.clone(),
            version,
            sample_kind,
            storage_ref,
            content_type: "application/json".to_owned(),
            file_name: Some(file_name.to_owned()),
            created_at: now,
        };

        self.registry
            .save_sample_metadata(SaveSampleMetadataRequest { sample: &metadata })
            .await?;
        info!(
            operation_id = %operation_id.as_str(),
            sample_id = %metadata.id.as_str(),
            version,
            "json sample saved"
        );

        Ok(metadata)
    }

    #[instrument(skip(self, payload), fields(operation_id = %operation_id.as_str()))]
    pub async fn generate_draft(
        &self,
        operation_id: &OperationId,
        payload: GenerateDraftPayload,
    ) -> Result<DraftGenerationResult, ApiError> {
        let summary = self.get_operation(operation_id).await?;
        let samples = self
            .registry
            .list_sample_metadata(operation_id, summary.current_draft_version)
            .await?;

        let input_sample = latest_sample_ref(&samples, SampleKind::InputJson)
            .ok_or_else(|| ApiError::validation("input_json sample was not found"))?;
        let output_sample = latest_sample_ref(&samples, SampleKind::OutputJson)
            .ok_or_else(|| ApiError::validation("output_json sample was not found"))?;
        let input_value = self.storage.read_json(&input_sample.storage_ref).await?;
        let output_value = self.storage.read_json(&output_sample.storage_ref).await?;

        let input_schema = Schema::from_json_sample(&input_value);
        let output_schema = Schema::from_json_sample(&output_value);
        let input_mapping = infer_mapping_from_samples(
            &input_value,
            JsonPathRoot::Mcp,
            &input_value,
            JsonPathRoot::RequestBody,
        );
        let output_mapping = infer_mapping_from_samples(
            &output_value,
            JsonPathRoot::ResponseBody,
            &output_value,
            JsonPathRoot::Output,
        );
        let source_types = if payload.sources.is_empty() {
            vec![
                "input_json_sample".to_owned(),
                "output_json_sample".to_owned(),
            ]
        } else {
            payload.sources
        };
        let generated_draft = GeneratedDraft {
            status: GeneratedDraftStatus::Available,
            source_types,
            generated_at: Some(now_string()?),
            input_schema_generated: true,
            output_schema_generated: true,
            input_mapping_generated: true,
            output_mapping_generated: true,
            warnings: Vec::new(),
        };

        let result = DraftGenerationResult {
            generated_draft,
            input_schema,
            output_schema,
            input_mapping,
            output_mapping,
        };
        info!(operation_id = %operation_id.as_str(), "draft generated from samples");

        Ok(result)
    }

    fn validate_operation_payload(&self, payload: &OperationPayload) -> Result<(), ApiError> {
        validate_protocol_target(payload.protocol, &payload.target)?;
        payload.input_mapping.validate_paths()?;
        payload.output_mapping.validate_paths()?;
        Ok(())
    }

    async fn find_operation_by_name(
        &self,
        name: &str,
    ) -> Result<Option<OperationSummary>, ApiError> {
        Ok(self
            .registry
            .list_operations()
            .await?
            .into_iter()
            .find(|operation| operation.name == name))
    }
}

fn build_request_preview(
    mapping: &MappingSet,
    input: &Value,
) -> Result<Value, mcpaas_mapping::MappingError> {
    let mapped = mapping.apply(&json!({ "mcp": input }))?;
    let prepared = PreparedRequest::from_mapping_output(&mapped).map_err(|error| {
        mcpaas_mapping::MappingError::InvalidJsonPath {
            path: error.to_string(),
        }
    })?;

    Ok(json!({
        "path": prepared.path_params,
        "query": prepared.query_params,
        "headers": prepared.headers,
        "grpc": prepared.grpc.unwrap_or(Value::Null),
        "variables": prepared.variables.unwrap_or(Value::Null),
        "body": prepared.body.unwrap_or(Value::Null)
    }))
}

fn validate_protocol_target(protocol: Protocol, target: &Target) -> Result<(), ApiError> {
    let is_match = matches!(
        (protocol, target),
        (Protocol::Rest, Target::Rest(_))
            | (Protocol::Graphql, Target::Graphql(_))
            | (Protocol::Grpc, Target::Grpc(_))
    );

    if is_match {
        return Ok(());
    }

    Err(ApiError::validation("protocol and target kind must match"))
}

fn validate_auth_profile_kind(kind: AuthKind, config: &AuthConfig) -> Result<(), ApiError> {
    let is_match = matches!(
        (kind, config),
        (AuthKind::Bearer, AuthConfig::Bearer(_))
            | (AuthKind::Basic, AuthConfig::Basic(_))
            | (AuthKind::ApiKeyHeader, AuthConfig::ApiKeyHeader(_))
            | (AuthKind::ApiKeyQuery, AuthConfig::ApiKeyQuery(_))
    );

    if is_match {
        return Ok(());
    }

    Err(ApiError::validation("auth kind and config must match"))
}

fn latest_sample_ref(
    samples: &[OperationSampleMetadata],
    sample_kind: SampleKind,
) -> Option<OperationSampleMetadata> {
    samples
        .iter()
        .rev()
        .find(|sample| sample.sample_kind == sample_kind)
        .cloned()
}

fn default_export_mode() -> ExportMode {
    ExportMode::Portable
}

fn new_prefixed_id(prefix: &str) -> String {
    format!("{prefix}_{}", Uuid::now_v7().simple())
}

fn now_string() -> Result<String, ApiError> {
    OffsetDateTime::now_utc()
        .format(&Rfc3339)
        .map_err(|error| ApiError::internal(error.to_string()))
}

fn proto_service_summary(service: ProtoService) -> Result<GrpcServiceSummary, ApiError> {
    let methods = service
        .unary_methods()
        .map(|method| {
            Ok(GrpcMethodSummary {
                name: method.name.clone(),
                kind: "unary".to_owned(),
                input_schema: mcpaas_proto::message_to_schema(&method.input)
                    .map_err(|error| ApiError::validation(error.to_string()))?,
                output_schema: mcpaas_proto::message_to_schema(&method.output)
                    .map_err(|error| ApiError::validation(error.to_string()))?,
            })
        })
        .collect::<Result<Vec<_>, ApiError>>()?;

    Ok(GrpcServiceSummary {
        package: service.package,
        service: service.name,
        methods,
    })
}