use std::{env, path::PathBuf};

static ALWAYS_SERDE: &str = "#[cfg_attr(not(feature = \"serde_serialize\"), \
                               derive(::serde::Serialize, ::serde::Deserialize))]";

fn main() -> Result<(), Box<dyn std::error::Error>> {
    println!("cargo:rerun-if-changed=./protos");
    let out = PathBuf::from(env::var("OUT_DIR").unwrap());
    let descriptor_file = out.join("descriptors.bin");
    tonic_build::configure()
        // We don't actually want to build the grpc definitions - we don't need them (for now).
        // Just build the message structs.
        .build_server(false)
        .build_client(true)
        // Make conversions easier for some types
        .type_attribute(
            "temporal.api.history.v1.HistoryEvent.attributes",
            "#[derive(::derive_more::From)]",
        )
        .type_attribute(
            "temporal.api.history.v1.History",
            "#[derive(::derive_more::From)]",
        )
        .type_attribute(
            "temporal.api.command.v1.Command.attributes",
            "#[derive(::derive_more::From)]",
        )
        .type_attribute(
            "temporal.api.common.v1.WorkflowType",
            "#[derive(::derive_more::From)]",
        )
        .type_attribute(
            "temporal.api.common.v1.Header",
            "#[derive(::derive_more::From)]",
        )
        .type_attribute(
            "temporal.api.common.v1.Memo",
            "#[derive(::derive_more::From)]",
        )
        .type_attribute(
            "temporal.api.enums.v1.SignalExternalWorkflowExecutionFailedCause",
            "#[derive(::derive_more::Display)]",
        )
        .type_attribute(
            "temporal.api.enums.v1.CancelExternalWorkflowExecutionFailedCause",
            "#[derive(::derive_more::Display)]",
        )
        .type_attribute(
            "coresdk.workflow_commands.WorkflowCommand.variant",
            "#[derive(::derive_more::From, ::derive_more::Display)]",
        )
        .type_attribute(
            "coresdk.workflow_commands.QueryResult.variant",
            "#[derive(::derive_more::From)]",
        )
        .type_attribute(
            "coresdk.workflow_activation.workflow_activation_job",
            "#[derive(::derive_more::From)]",
        )
        .type_attribute(
            "coresdk.workflow_activation.WorkflowActivationJob.variant",
            "#[derive(::derive_more::From)]",
        )
        .type_attribute(
            "coresdk.workflow_completion.WorkflowActivationCompletion.status",
            "#[derive(::derive_more::From)]",
        )
        .type_attribute(
            "coresdk.activity_result.ActivityExecutionResult.status",
            "#[derive(::derive_more::From)]",
        )
        .type_attribute(
            "coresdk.activity_result.ActivityResolution.status",
            "#[derive(::derive_more::From)]",
        )
        .type_attribute(
            "coresdk.activity_task.ActivityCancelReason",
            "#[derive(::derive_more::Display)]",
        )
        .type_attribute("coresdk.Task.variant", "#[derive(::derive_more::From)]")
        // All external data is useful to be able to JSON serialize, so it can render in web UI
        .type_attribute(".coresdk.external_data", ALWAYS_SERDE)
        .type_attribute(
            ".",
            "#[cfg_attr(feature = \"serde_serialize\", derive(::serde::Serialize, ::serde::Deserialize))]",
        )
        .field_attribute(
            "coresdk.external_data.LocalActivityMarkerData.complete_time",
            "#[serde(with = \"opt_timestamp\")]",
        )
        .field_attribute(
            "coresdk.external_data.LocalActivityMarkerData.original_schedule_time",
            "#[serde(with = \"opt_timestamp\")]",
        )
        .field_attribute(
            "coresdk.external_data.LocalActivityMarkerData.backoff",
            "#[serde(with = \"opt_duration\")]",
        )
        .extern_path(
            ".google.protobuf.Any",
            "::prost_wkt_types::Any"
        )
        .extern_path(
            ".google.protobuf.Timestamp",
            "::prost_wkt_types::Timestamp"
        )
        .extern_path(
            ".google.protobuf.Duration",
            "::prost_wkt_types::Duration"
        )
        .extern_path(
            ".google.protobuf.Value",
            "::prost_wkt_types::Value"
        )
        .file_descriptor_set_path(descriptor_file)
        .skip_debug("temporal.api.common.v1.Payload")
        .compile_protos(
            &[
                "./protos/local/temporal/sdk/core/core_interface.proto",
                "./protos/api_upstream/temporal/api/workflowservice/v1/service.proto",
                "./protos/api_upstream/temporal/api/operatorservice/v1/service.proto",
                "./protos/api_cloud_upstream/temporal/api/cloud/cloudservice/v1/service.proto",
                "./protos/testsrv_upstream/temporal/api/testservice/v1/service.proto",
                "./protos/grpc/health/v1/health.proto",
            ],
            &[
                "./protos/api_upstream",
                "./protos/api_cloud_upstream",
                "./protos/local",
                "./protos/testsrv_upstream",
                "./protos/grpc",
            ],
        )?;

    Ok(())
}
