/*
 * Copyright 2025 CloudWeGo Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package eino

import (
	"context"

	"github.com/RanFeng/ilog"
	"github.com/cloudwego/eino/compose"

	"github.com/cloudwego/eino-examples/flow/agent/deer-go/biz/consts"
	"github.com/cloudwego/eino-examples/flow/agent/deer-go/biz/model"
)

func routerResearchTeam(ctx context.Context, input string, opts ...any) (output string, err error) {
	//ilog.EventInfo(ctx, "routerResearchTeam", "input", input)
	err = compose.ProcessState[*model.State](ctx, func(_ context.Context, state *model.State) error {
		defer func() {
			output = state.Goto
		}()
		state.Goto = consts.Planner
		if state.CurrentPlan == nil {
			return nil
		}
		for i, step := range state.CurrentPlan.Steps {
			if step.ExecutionRes != nil {
				continue
			}
			ilog.EventInfo(ctx, "research_team_step", "step", step, "index", i)
			switch step.StepType {
			case model.Research:
				state.Goto = consts.Researcher
				return nil
			case model.Processing:
				state.Goto = consts.Coder
				return nil
			}
		}
		if state.PlanIterations >= state.MaxPlanIterations {
			state.Goto = consts.Reporter
			return nil
		}
		return nil
	})
	return output, nil
}

func NewResearchTeamNode[I, O any](ctx context.Context) *compose.Graph[I, O] {
	cag := compose.NewGraph[I, O]()
	_ = cag.AddLambdaNode("router", compose.InvokableLambdaWithOption(routerResearchTeam))

	_ = cag.AddEdge(compose.START, "router")
	_ = cag.AddEdge("router", compose.END)

	return cag
}