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import React, { useRef, useEffect } from 'react';
import { Box, Typography, CircularProgress, Button } from '@mui/material';
import CheckIcon from '@mui/icons-material/Check';
import CloseIcon from '@mui/icons-material/Close';
import StopCircleIcon from '@mui/icons-material/StopCircle';
import HourglassEmptyIcon from '@mui/icons-material/HourglassEmpty';
import AccessTimeIcon from '@mui/icons-material/AccessTime';
import CableIcon from '@mui/icons-material/Cable';
import { AgentTraceMetadata } from '@/types/agent';
import { useAgentStore, selectSelectedStepIndex, selectFinalStep, selectIsConnectingToE2B, selectIsAgentProcessing } from '@/stores/agentStore';
interface TimelineProps {
metadata: AgentTraceMetadata;
isRunning: boolean;
}
export const Timeline: React.FC<TimelineProps> = ({ metadata, isRunning }) => {
const timelineRef = useRef<HTMLDivElement>(null);
const selectedStepIndex = useAgentStore(selectSelectedStepIndex);
const setSelectedStepIndex = useAgentStore((state) => state.setSelectedStepIndex);
const finalStep = useAgentStore(selectFinalStep);
const isConnectingToE2B = useAgentStore(selectIsConnectingToE2B);
const isAgentProcessing = useAgentStore(selectIsAgentProcessing);
// Show connection indicator if connecting or if we have started processing
const showConnectionIndicator = isConnectingToE2B || isAgentProcessing || (metadata.numberOfSteps > 0) || finalStep;
// Generate array of steps with their status
// Only show completed steps + current step if running
const totalStepsToShow = isRunning && !isConnectingToE2B
? metadata.numberOfSteps + 1 // Show completed steps + current step
: metadata.numberOfSteps; // Show only completed steps when not running
// Calculate total width for the line (including finalStep if present)
const lineWidth = finalStep
? `calc(${totalStepsToShow} * (40px + 12px) + 52px)` // Add space for finalStep (40px + 12px gap)
: `calc(${totalStepsToShow} * (40px + 12px))`;
const steps = Array.from({ length: totalStepsToShow }, (_, index) => ({
stepNumber: index + 1,
stepIndex: index,
isCompleted: index < metadata.numberOfSteps,
// Step is current if: we're at the right index AND running AND not connecting to E2B
isCurrent: (index === metadata.numberOfSteps && isRunning && !isConnectingToE2B) ||
(index === 0 && metadata.numberOfSteps === 0 && isRunning && !isConnectingToE2B),
isSelected: selectedStepIndex === index,
}));
// Handle step click
const handleStepClick = (stepIndex: number, isCompleted: boolean, isCurrent: boolean) => {
if (isCompleted) {
setSelectedStepIndex(stepIndex);
} else if (isCurrent) {
// Clicking on the current step (with animation) goes back to live mode
setSelectedStepIndex(null);
}
};
// Handle final step click (goes to live mode showing the final status)
const handleFinalStepClick = () => {
setSelectedStepIndex(null);
};
// Auto-scroll to current step while running
useEffect(() => {
if (timelineRef.current && isRunning) {
// Only auto-scroll while running, not when finished
const currentStepElement = timelineRef.current.querySelector(`[data-step="${metadata.numberOfSteps}"]`);
if (currentStepElement) {
currentStepElement.scrollIntoView({ behavior: 'smooth', inline: 'center', block: 'nearest' });
}
}
}, [metadata.numberOfSteps, isRunning]);
return (
<Box
sx={{
p: 2,
border: '1px solid',
borderColor: 'divider',
borderRadius: '12px',
backgroundColor: 'background.paper',
flexShrink: 0,
}}
>
<Box sx={{ display: 'flex', flexDirection: 'column', gap: 1.5 }}>
{/* Header with step count */}
<Box sx={{ display: 'flex', alignItems: 'center', justifyContent: 'space-between' }}>
<Typography variant="h6" sx={{ fontSize: '0.9rem', fontWeight: 700, color: 'text.primary' }}>
Timeline
{selectedStepIndex !== null && (
<Typography component="span" sx={{ ml: 1, color: 'text.secondary', fontWeight: 500, fontSize: '0.65rem' }}>
- Viewing step {selectedStepIndex + 1}
</Typography>
)}
</Typography>
{selectedStepIndex !== null && (
<Button
size="small"
variant="outlined"
onClick={handleFinalStepClick}
sx={{
textTransform: 'none',
fontSize: '0.7rem',
fontWeight: 600,
px: 1.5,
py: 0.25,
minWidth: 'auto',
color: 'text.secondary',
borderColor: 'divider',
'&:hover': {
backgroundColor: (theme) => theme.palette.mode === 'dark' ? 'rgba(255,255,255,0.05)' : 'rgba(0,0,0,0.03)',
borderColor: 'text.secondary',
},
}}
>
Back to latest step
</Button>
)}
</Box>
{/* Horizontal scrollable step indicators */}
<Box
ref={timelineRef}
sx={{
display: 'flex',
alignItems: 'center',
overflowX: 'auto',
overflowY: 'hidden',
gap: 1.5,
py: 1.5,
height: 60,
position: 'relative',
// Hide scrollbar completely
scrollbarWidth: 'none', // Firefox
'&::-webkit-scrollbar': {
display: 'none', // Chrome, Safari, Edge
},
// Horizontal line crossing through circles
'&::before': {
content: '""',
position: 'absolute',
left: "25px",
// Calculate width to cover visible steps + finalStep if present
width: lineWidth,
top: '19.5px',
transform: 'translateY(-50%)',
transition: 'width 0.6s cubic-bezier(0.4, 0, 0.2, 1)',
height: '2px',
backgroundColor: (theme) => theme.palette.mode === 'dark' ? 'rgba(255, 255, 255, 0.1)' : 'rgba(0, 0, 0, 0.3)',
zIndex: 0,
pointerEvents: 'none',
},
}}
>
{/* Connection indicator (step 0) */}
{showConnectionIndicator && (
<Box
data-step="connection"
sx={{
display: 'flex',
flexDirection: 'column',
alignItems: 'center',
gap: 0.75,
minWidth: 40,
flexShrink: 0,
position: 'relative',
zIndex: 1,
}}
>
{/* White circle background to hide the line */}
<Box
sx={{
position: 'relative',
display: 'flex',
alignItems: 'center',
justifyContent: 'center',
height: 28,
width: 28,
}}
>
{/* White background to hide the line */}
<Box
sx={{
position: 'absolute',
width: 28,
height: 28,
borderRadius: '50%',
backgroundColor: 'background.paper',
zIndex: 0,
}}
/>
{/* Connection icon */}
{isConnectingToE2B ? (
<CircularProgress
size={20}
thickness={5}
sx={{
color: 'primary.main',
position: 'relative',
zIndex: 1,
}}
/>
) : (
<CableIcon
sx={{
fontSize: 20,
color: 'success.main',
position: 'relative',
zIndex: 1,
}}
/>
)}
</Box>
{/* Connection label */}
<Typography
variant="caption"
sx={{
fontSize: '0.7rem',
fontWeight: 700,
color: isConnectingToE2B ? 'primary.main' : 'success.main',
whiteSpace: 'nowrap',
}}
>
{isConnectingToE2B ? 'Connecting' : 'Connected'}
</Typography>
</Box>
)}
{/* Render steps and insert final step at the right position */}
{steps.map((step, index) => (
<React.Fragment key={step.stepNumber}>
<Box
data-step={step.stepNumber}
onClick={() => handleStepClick(step.stepIndex, step.isCompleted, step.isCurrent)}
sx={{
display: 'flex',
flexDirection: 'column',
alignItems: 'center',
gap: 0.75,
minWidth: 40,
flexShrink: 0,
position: 'relative',
zIndex: 1,
cursor: (step.isCompleted || step.isCurrent) ? 'pointer' : 'default',
'&:hover': (step.isCompleted || step.isCurrent) ? {
'& .step-dot': {
transform: 'scale(1.15)',
},
} : {},
}}
>
{/* White circle background to hide the line */}
<Box
sx={{
position: 'relative',
display: 'flex',
alignItems: 'center',
justifyContent: 'center',
height: 28,
width: 28,
}}
>
{/* White background to hide the line */}
<Box
sx={{
position: 'absolute',
width: 28,
height: 28,
borderRadius: '50%',
backgroundColor: 'background.paper',
zIndex: 0,
}}
/>
{/* Step dot */}
{step.isCurrent ? (
<Box
sx={{
position: 'relative',
display: 'flex',
alignItems: 'center',
justifyContent: 'center',
zIndex: 1,
}}
>
<CircularProgress
size={20}
thickness={5}
sx={{
color: 'primary.main',
position: 'absolute',
}}
/>
<Box
sx={{
width: 8,
height: 8,
borderRadius: '50%',
backgroundColor: 'white',
position: 'absolute',
pointerEvents: 'none',
boxShadow: '0 0 4px rgba(0,0,0,0.2)',
}}
/>
</Box>
) : (
<Box
sx={{
position: 'relative',
display: 'flex',
alignItems: 'center',
justifyContent: 'center',
zIndex: 1,
}}
>
<Box
className="step-dot"
sx={{
width: step.isSelected ? 20 : step.isCompleted ? 14 : 12,
height: step.isSelected ? 20 : step.isCompleted ? 14 : 12,
borderRadius: '50%',
// Always keep steps in primary color (blue)
backgroundColor: step.isCompleted
? 'primary.main' // Blue for completed steps
: (theme) => theme.palette.mode === 'dark' ? 'grey.800' : 'grey.300', // Light grey for future steps
transition: 'all 0.2s ease',
boxShadow: step.isCompleted || step.isSelected
? step.isSelected
? '0 0 8px rgba(255, 167, 38, 0.5)'
: '0 2px 4px rgba(0,0,0,0.1)'
: 'none',
}}
/>
{/* White dot for selected step */}
{step.isSelected && (
<Box
sx={{
width: 8,
height: 8,
borderRadius: '50%',
backgroundColor: 'white',
position: 'absolute',
}}
/>
)}
</Box>
)}
</Box>
{/* Step number - show for all steps */}
<Typography
variant="caption"
sx={{
fontSize: '0.7rem',
fontWeight: step.isSelected || step.isCurrent ? 900 : 400,
color: step.isCurrent
? 'primary.main'
: (step.isCompleted || step.isSelected
? 'text.primary'
: (theme) => theme.palette.mode === 'dark' ? 'grey.700' : 'grey.400'),
whiteSpace: 'nowrap',
lineHeight: 1,
}}
>
{step.stepNumber}
</Typography>
</Box>
{/* Insert final step indicator right after the last completed step */}
{finalStep && step.stepNumber === metadata.numberOfSteps && (
<Box
data-step="final"
onClick={handleFinalStepClick}
sx={{
display: 'flex',
flexDirection: 'column',
alignItems: 'center',
gap: 0.75,
minWidth: 40,
flexShrink: 0,
position: 'relative',
zIndex: 1,
cursor: 'pointer',
'&:hover': {
'& .final-step-icon': {
transform: 'scale(1.15)',
},
},
}}
>
{/* White circle background to hide the line */}
<Box
sx={{
position: 'relative',
display: 'flex',
alignItems: 'center',
justifyContent: 'center',
height: 28,
width: 28,
}}
>
{/* White background to hide the line */}
<Box
sx={{
position: 'absolute',
width: 28,
height: 28,
borderRadius: '50%',
backgroundColor: 'background.paper',
zIndex: 0,
}}
/>
{/* Final step icon */}
<Box
className="final-step-icon"
sx={{
width: selectedStepIndex === null ? 20 : 18,
height: selectedStepIndex === null ? 20 : 18,
borderRadius: '50%',
backgroundColor:
finalStep.type === 'success' ? 'success.main' :
finalStep.type === 'stopped' || finalStep.type === 'max_steps_reached' ? 'warning.main' :
'error.main',
display: 'flex',
alignItems: 'center',
justifyContent: 'center',
transition: 'all 0.2s ease',
boxShadow: selectedStepIndex === null
? finalStep.type === 'success'
? '0 2px 8px rgba(102, 187, 106, 0.4)'
: finalStep.type === 'stopped' || finalStep.type === 'max_steps_reached'
? '0 2px 8px rgba(255, 152, 0, 0.4)'
: '0 2px 8px rgba(244, 67, 54, 0.4)'
: '0 2px 4px rgba(0,0,0,0.1)',
position: 'relative',
zIndex: 1,
}}
>
{finalStep.type === 'success' ? (
<CheckIcon sx={{ fontSize: 14, color: 'white' }} />
) : finalStep.type === 'stopped' ? (
<StopCircleIcon sx={{ fontSize: 14, color: 'white' }} />
) : finalStep.type === 'max_steps_reached' ? (
<HourglassEmptyIcon sx={{ fontSize: 14, color: 'white' }} />
) : finalStep.type === 'sandbox_timeout' ? (
<AccessTimeIcon sx={{ fontSize: 14, color: 'white' }} />
) : (
<CloseIcon sx={{ fontSize: 14, color: 'white' }} />
)}
</Box>
</Box>
{/* Final step label */}
<Typography
variant="caption"
sx={{
fontSize: '0.7rem',
fontWeight: selectedStepIndex === null ? 700 : 500,
color:
finalStep.type === 'success'
? (selectedStepIndex === null ? 'text.primary' : 'text.secondary')
: finalStep.type === 'stopped' || finalStep.type === 'max_steps_reached'
? 'warning.main'
: 'error.main',
whiteSpace: 'nowrap',
}}
>
{finalStep.type === 'success' ? 'End' :
finalStep.type === 'stopped' ? 'Stopped' :
finalStep.type === 'max_steps_reached' ? 'Max Steps' :
finalStep.type === 'sandbox_timeout' ? 'Timeout' :
'Failed'}
</Typography>
</Box>
)}
</React.Fragment>
))}
</Box>
</Box>
</Box>
);
};
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