package runtime

import (
	"context"
	"fmt"
	"strings"

	applicationruntime "code.tczkiot.com/wlw/ai-agent/internal/ai/application/runtime"
	"code.tczkiot.com/wlw/ai-agent/internal/ai/runtime/graphs"
	"code.tczkiot.com/wlw/ai-agent/internal/models"
)

type runtimeReplyExecutor struct{}

type runtimeReplyRunInput struct {
	Conversation models.Conversation
	Message      models.Message
	AIAgent      models.AIAgent
}

type runtimeReplyResumeInput struct {
	Conversation     models.Conversation
	Message          models.Message
	AIAgent          models.AIAgent
	PendingInterrupt *models.ConversationInterrupt
}

func newRuntimeReplyExecutor() *runtimeReplyExecutor {
	return &runtimeReplyExecutor{}
}

func (e *runtimeReplyExecutor) Run(ctx context.Context, input runtimeReplyRunInput) (*applicationruntime.RunResult, error) {
	config, err := applicationruntime.ResolveRuntimeAIConfig(ctx, input.AIAgent.AIConfigID)
	if err != nil {
		return nil, err
	}
	// The trigger layer may enrich an anonymous channel conversation with a
	// business subject resolved from the current message or recent history.
	// Run the already validated objects so that card/device identity is not lost
	// by reloading the original guest ownership record from the database.
	summary, err := applicationruntime.DefaultAgentApplicationService.RunPrepared(ctx, applicationruntime.RunInput{
		Conversation: input.Conversation,
		UserMessage:  input.Message,
		AIAgent:      input.AIAgent,
		AIConfig:     *config,
	})
	return summary, err
}

func (e *runtimeReplyExecutor) ResumePendingInterrupt(ctx context.Context, input runtimeReplyResumeInput) (*applicationruntime.RunResult, error) {
	if input.PendingInterrupt == nil {
		return nil, fmt.Errorf("pending interrupt is required")
	}
	config, err := applicationruntime.ResolveRuntimeAIConfig(ctx, input.AIAgent.AIConfigID)
	if err != nil {
		return nil, err
	}
	summary, err := applicationruntime.DefaultAgentApplicationService.ResumePrepared(ctx, applicationruntime.ResumeInput{
		Conversation: input.Conversation,
		UserMessage:  input.Message,
		AIAgent:      input.AIAgent,
		AIConfig:     *config,
		CheckPointID: strings.TrimSpace(input.PendingInterrupt.CheckPointID),
		ResumeData: map[string]string{
			strings.TrimSpace(input.PendingInterrupt.InterruptID): strings.TrimSpace(input.Message.Content),
		},
	})
	return summary, err
}

func expiredInterruptSummary() *applicationruntime.RunResult {
	return &applicationruntime.RunResult{
		Status:    "expired",
		ReplyText: graphs.ConfirmationExpiredReply,
	}
}