import {
  CheckCircleFilled,
  ClockCircleFilled,
  CloseCircleFilled,
  ExclamationCircleFilled,
  InfoCircleFilled,
  MenuFoldOutlined,
  MenuUnfoldOutlined,
} from '@ant-design/icons'
import {
  Alert,
  Badge,
  Button,
  Layout,
  Menu,
  Space,
  Table,
  Tag,
  Tooltip,
  Typography,
  theme,
  type TableProps,
} from 'antd'
import { useEffect, useState, type CSSProperties } from 'react'
import {
  isEditingAvailable,
  isRightPanelCollapsible,
  semanticStatusColors,
  statusDefinitions,
  workspaceThemeTokens,
  type WorkspaceStatus,
} from './workspaceContracts'
import type { AuthenticatedUser } from '../auth/authContracts'
import './WorkspaceShell.css'

const { Header, Sider, Content } = Layout
const { Text, Title } = Typography

type CycleRow = {
  key: string
  municipality: string
  cycle: string
  service: string
  status: WorkspaceStatus
  dueDate: string
  owner: string
}

const cycleRows: CycleRow[] = [
  {
    key: 'CAM-1042',
    municipality: 'Fairview Borough',
    cycle: 'Primary 2026',
    service: 'Addressing',
    status: 'onTrack',
    dueDate: 'May 18',
    owner: 'Client Services',
  },
  {
    key: 'CAM-1088',
    municipality: 'Lake Township',
    cycle: 'Primary 2026',
    service: 'Transport',
    status: 'atRisk',
    dueDate: 'May 12',
    owner: 'Production Lead',
  },
  {
    key: 'CAM-1120',
    municipality: 'Northfield City',
    cycle: 'Special 2026',
    service: 'Sorting',
    status: 'blocked',
    dueDate: 'May 9',
    owner: 'Data Quality',
  },
  {
    key: 'CAM-1137',
    municipality: 'Pine County',
    cycle: 'General 2026',
    service: 'Office Copies',
    status: 'inProgress',
    dueDate: 'May 22',
    owner: 'Operations',
  },
]

const riskItems = [
  {
    id: 'RQ-18',
    title: 'Lake Township transport confirmation',
    status: 'atRisk' as WorkspaceStatus,
    owner: 'Production Lead',
  },
  {
    id: 'RQ-21',
    title: 'Northfield missing sorting owner',
    status: 'blocked' as WorkspaceStatus,
    owner: 'Data Quality',
  },
  {
    id: 'RQ-24',
    title: 'Pine County proof approval check',
    status: 'inProgress' as WorkspaceStatus,
    owner: 'Operations',
  },
]

const statusIcons = {
  onTrack: CheckCircleFilled,
  atRisk: ExclamationCircleFilled,
  blocked: CloseCircleFilled,
  inProgress: InfoCircleFilled,
  overdue: ClockCircleFilled,
} satisfies Record<WorkspaceStatus, typeof CheckCircleFilled>

function useViewportWidth() {
  const [width, setWidth] = useState(() =>
    typeof window === 'undefined' ? 1600 : window.innerWidth,
  )

  useEffect(() => {
    const updateWidth = () => setWidth(window.innerWidth)

    updateWidth()
    window.addEventListener('resize', updateWidth)

    return () => window.removeEventListener('resize', updateWidth)
  }, [])

  return width
}

function StatusIndicator({ status }: { status: WorkspaceStatus }) {
  const definition = statusDefinitions[status]
  const Icon = statusIcons[status]

  return (
    <Tag
      className="workspace-status"
      style={{
        borderColor: definition.color,
        color: definition.color,
      }}
      aria-label={`${definition.iconLabel}: ${definition.label}`}
    >
      <Icon aria-hidden="true" />
      <span>{definition.label}</span>
    </Tag>
  )
}

function WorkspaceNavigation() {
  return (
    <Sider width={248} className="workspace-nav" theme="light">
      <div className="workspace-brand">
        <Text className="workspace-brand__eyebrow">Campaign Tracker</Text>
        <Title level={1}>Operations</Title>
      </div>
      <Menu
        mode="inline"
        defaultSelectedKeys={['cycles']}
        items={[
          { key: 'cycles', label: 'Election Cycles' },
          { key: 'municipalities', label: 'Municipalities' },
          { key: 'milestones', label: 'Milestones' },
          { key: 'reports', label: 'Reports' },
        ]}
      />
    </Sider>
  )
}

function RiskPanel({
  collapsed,
  onToggle,
  canCollapse,
}: {
  collapsed: boolean
  onToggle: () => void
  canCollapse: boolean
}) {
  if (collapsed) {
    return (
      <Sider width={48} className="workspace-inspector workspace-inspector--rail">
        <Tooltip title="Open risk panel" placement="left">
          <Button
            type="text"
            icon={<MenuUnfoldOutlined />}
            aria-label="Open risk panel"
            onClick={onToggle}
          />
        </Tooltip>
      </Sider>
    )
  }

  return (
    <Sider width={336} className="workspace-inspector" theme="light">
      <div className="workspace-inspector__header">
        <div>
          <Text className="workspace-kicker">Risk queue</Text>
          <Title level={2}>Cutoff Watch</Title>
        </div>
        {canCollapse ? (
          <Tooltip title="Collapse risk panel" placement="left">
            <Button
              type="text"
              icon={<MenuFoldOutlined />}
              aria-label="Collapse risk panel"
              onClick={onToggle}
            />
          </Tooltip>
        ) : null}
      </div>
      <Space direction="vertical" size={8} className="workspace-risk-list">
        {riskItems.map((item) => (
          <article className="workspace-risk-item" key={item.id}>
            <div>
              <Text className="workspace-risk-item__id">{item.id}</Text>
              <Text strong>{item.title}</Text>
            </div>
            <StatusIndicator status={item.status} />
            <Text type="secondary">{item.owner}</Text>
          </article>
        ))}
      </Space>
    </Sider>
  )
}

export function WorkspaceShell({ user }: { user: AuthenticatedUser }) {
  const width = useViewportWidth()
  const editingAvailable = isEditingAvailable(width)
  const canCollapseRightPanel = isRightPanelCollapsible(width)
  const [rightPanelCollapseRequested, setRightPanelCollapseRequested] =
    useState(false)
  const rightPanelCollapsed =
    canCollapseRightPanel && rightPanelCollapseRequested
  const { token } = theme.useToken()

  const columns: TableProps<CycleRow>['columns'] = [
    {
      title: 'Record',
      dataIndex: 'key',
      key: 'key',
      render: (value: string) => <Text code>{value}</Text>,
    },
    {
      title: 'Municipality',
      dataIndex: 'municipality',
      key: 'municipality',
    },
    {
      title: 'Cycle',
      dataIndex: 'cycle',
      key: 'cycle',
    },
    {
      title: 'Service',
      dataIndex: 'service',
      key: 'service',
    },
    {
      title: 'Status',
      dataIndex: 'status',
      key: 'status',
      render: (status: WorkspaceStatus) => <StatusIndicator status={status} />,
    },
    {
      title: 'Due',
      dataIndex: 'dueDate',
      key: 'dueDate',
    },
    {
      title: 'Owner',
      dataIndex: 'owner',
      key: 'owner',
    },
  ]

  return (
    <Layout
      className="workspace-shell"
      style={
        {
        '--workspace-secondary': semanticStatusColors.secondary,
        '--workspace-focus': workspaceThemeTokens.colorInfo,
        '--workspace-border': workspaceThemeTokens.colorBorder,
        '--workspace-surface': '#FFFFFF',
        '--workspace-text-secondary': workspaceThemeTokens.colorTextSecondary,
        } as CSSProperties
      }
    >
      <WorkspaceNavigation />
      <Layout className="workspace-main">
        <Header className="workspace-header">
          <Space align="center" size={12}>
            <Badge color={workspaceThemeTokens.colorPrimary} text="Primary workspace" />
            <Text type="secondary">{user.userName}</Text>
          </Space>
          <Space>
            <Button disabled={!editingAvailable}>Save View</Button>
            <Tooltip
              title={
                editingAvailable
                  ? 'Commit selected operational updates'
                  : 'Use a 1280px or wider desktop viewport for editing'
              }
            >
              <Button type="primary" disabled={!editingAvailable}>
                Commit Update
              </Button>
            </Tooltip>
          </Space>
        </Header>
        <Content className="workspace-content">
          {!editingAvailable ? (
            <Alert
              className="workspace-support-notice"
              type="info"
              showIcon
              message="Reduced read mode"
              description="This viewport is below the 1280px operational minimum. Review is available, but editing and commit actions are disabled until the workspace is opened on a supported desktop width."
            />
          ) : null}
          <section
            className="workspace-board"
            aria-label="Election cycle operations workspace"
          >
            <div className="workspace-board__header">
              <div>
                <Text className="workspace-kicker">Election cycle setup</Text>
                <Title level={2}>Municipality work queue</Title>
              </div>
              <Space size={8} wrap>
                <StatusIndicator status="onTrack" />
                <StatusIndicator status="atRisk" />
                <StatusIndicator status="blocked" />
              </Space>
            </div>
            <Table
              className="workspace-table"
              columns={columns}
              dataSource={cycleRows}
              pagination={false}
              size="small"
              scroll={{ x: 960 }}
              rowClassName={(row) =>
                row.status === 'blocked' ? 'workspace-row--blocked' : ''
              }
            />
            <div className="workspace-board__footer">
              <Text type="secondary">
                Last refreshed 12:48 PM. Legacy source context remains read-only;
                new workflow updates route through extension records.
              </Text>
              <Button
                style={{ borderColor: token.colorBorder }}
                disabled={!editingAvailable}
              >
                Open Inspector
              </Button>
            </div>
          </section>
        </Content>
      </Layout>
      <RiskPanel
        collapsed={rightPanelCollapsed}
        canCollapse={canCollapseRightPanel}
        onToggle={() => setRightPanelCollapseRequested((value) => !value)}
      />
    </Layout>
  )
}