package agentsvc

import (
	"context"
	"testing"

	agentreq "github.com/kweaver-ai/kweaver-core/decision-agent/agent-backend/agent-factory/src/driveradapter/api/rdto/agent/req"
	"github.com/stretchr/testify/assert"
)

func TestHandleStopChan_PanicsWithoutDependencies(t *testing.T) {
	t.Parallel()

	svc := &agentSvc{}
	// All dependencies are nil

	ctx := context.Background()
	req := &agentreq.ChatReq{
		AgentID:        "agent-123",
		ConversationID: "conv-456",
		AgentRunID:     "run-789",
	}
	session := &Session{
		ConversationID: "conv-456",
	}

	// Should panic when trying to access nil dependencies
	assert.Panics(t, func() {
		_ = svc.HandleStopChan(ctx, req, session)
	})
}

func TestHandleStopChan_PanicsWithNilSession(t *testing.T) {
	t.Parallel()

	svc := &agentSvc{}

	ctx := context.Background()
	req := &agentreq.ChatReq{
		AgentID:        "agent-123",
		ConversationID: "conv-456",
		AgentRunID:     "run-789",
	}

	assert.Panics(t, func() {
		_ = svc.HandleStopChan(ctx, req, nil)
	})
}

func TestHandleStopChan_VerifyFunctionSignature(t *testing.T) {
	t.Parallel()

	// This test verifies that HandleStopChan has the correct function signature
	// The function should take (context.Context, *agentreq.ChatReq, *Session) and return error

	svc := &agentSvc{}

	ctx := context.Background()
	req := &agentreq.ChatReq{
		AgentID:        "agent-123",
		ConversationID: "conv-456",
		AgentRunID:     "run-789",
	}
	session := &Session{
		ConversationID: "conv-456",
	}

	// Verify the function exists and can be called (will panic without proper setup)
	assert.Panics(t, func() {
		_ = svc.HandleStopChan(ctx, req, session)
	})
}

func TestHandleStopChan_WithEmptyRequest(t *testing.T) {
	t.Parallel()

	svc := &agentSvc{}

	ctx := context.Background()
	req := &agentreq.ChatReq{}
	session := &Session{}

	assert.Panics(t, func() {
		_ = svc.HandleStopChan(ctx, req, session)
	})
}

func TestHandleStopChan_WithMissingConversationID(t *testing.T) {
	t.Parallel()

	svc := &agentSvc{}

	ctx := context.Background()
	req := &agentreq.ChatReq{
		AgentID:    "agent-123",
		AgentRunID: "run-789",
		// Missing ConversationID
	}
	session := &Session{}

	assert.Panics(t, func() {
		_ = svc.HandleStopChan(ctx, req, session)
	})
}

func TestHandleStopChan_WithMissingAgentRunID(t *testing.T) {
	t.Parallel()

	svc := &agentSvc{}

	ctx := context.Background()
	req := &agentreq.ChatReq{
		AgentID:        "agent-123",
		ConversationID: "conv-456",
		// Missing AgentRunID
	}
	session := &Session{
		ConversationID: "conv-456",
	}

	assert.Panics(t, func() {
		_ = svc.HandleStopChan(ctx, req, session)
	})
}

func TestHandleStopChan_ContextPropagation(t *testing.T) {
	t.Parallel()

	svc := &agentSvc{}

	ctx := context.Background()
	req := &agentreq.ChatReq{
		AgentID:        "agent-123",
		ConversationID: "conv-456",
		AgentRunID:     "run-789",
	}
	session := &Session{
		ConversationID: "conv-456",
	}

	assert.Panics(t, func() {
		_ = svc.HandleStopChan(ctx, req, session)
	})
}

func TestHandleStopChan_VerifySessionUsage(t *testing.T) {
	t.Parallel()

	svc := &agentSvc{}

	ctx := context.Background()
	req := &agentreq.ChatReq{
		AgentID:        "agent-123",
		ConversationID: "conv-456",
		AgentRunID:     "run-789",
	}
	session := &Session{
		ConversationID: "conv-456",
		Signal:         make(chan struct{}, 1),
	}

	// This verifies that the function uses session.GetTempMsgResp()
	// which will be called to get the temporary message response
	assert.Panics(t, func() {
		_ = svc.HandleStopChan(ctx, req, session)
	})
}

func TestHandleStopChan_VerifyResponseStructure(t *testing.T) {
	t.Parallel()

	svc := &agentSvc{}

	// This test verifies the response structure is correct
	// The function should return error

	ctx := context.Background()
	req := &agentreq.ChatReq{
		AgentID:        "agent-123",
		ConversationID: "conv-456",
		AgentRunID:     "run-789",
	}
	session := &Session{
		ConversationID: "conv-456",
	}

	// Verify the function returns error type (will panic without proper setup)
	assert.Panics(t, func() {
		err := svc.HandleStopChan(ctx, req, session)
		// If we get here, verify the return type
		_ = err
	})
}

func TestHandleStopChan_WithVariousAgentIDs(t *testing.T) {
	t.Parallel()

	svc := &agentSvc{}

	agentIDs := []string{"agent-1", "agent-2", "agent-3"}

	for _, agentID := range agentIDs {
		t.Run("agent_"+agentID, func(t *testing.T) {
			t.Parallel()

			ctx := context.Background()
			req := &agentreq.ChatReq{
				AgentID:        agentID,
				ConversationID: "conv-456",
				AgentRunID:     "run-789",
			}
			session := &Session{
				ConversationID: "conv-456",
			}

			assert.Panics(t, func() {
				_ = svc.HandleStopChan(ctx, req, session)
			})
		})
	}
}

func TestHandleStopChan_VerifyCancelStatus(t *testing.T) {
	t.Parallel()

	svc := &agentSvc{}

	// This test verifies that HandleStopChan properly sets the message status to cancelled
	// The status should be cdaenum.MsgStatusCancelled

	ctx := context.Background()
	req := &agentreq.ChatReq{
		AgentID:        "agent-123",
		ConversationID: "conv-456",
		AgentRunID:     "run-789",
	}
	session := &Session{
		ConversationID: "conv-456",
	}

	assert.Panics(t, func() {
		_ = svc.HandleStopChan(ctx, req, session)
	})
}
