import { Table2 } from 'lucide-react'
import { useState, type ReactNode } from 'react'
import { panel } from '../styles'

export interface LegendItem {
  label: string
  color: string
  shape?: 'rect' | 'line'
}

export interface TableData {
  columns: string[]
  rows: (string | number)[][]
}

/**
 * Card for one chart: title, legend (2+ series), and a table view that shows every value, so
 * nothing depends on hovering or on telling colors apart.
 */
export function ChartFrame({ title, subtitle, legend, table, children, className = '' }: { title: string; subtitle?: string; legend?: LegendItem[]; table: TableData; children: ReactNode; className?: string }) {
  const [showTable, setShowTable] = useState(false)
  return (
    <figure className={`${panel} m-0 flex flex-col p-5 ${className}`}>
      <div className="mb-3 flex items-start justify-between gap-3">
        <div>
          <figcaption className="font-display text-[17px] font-semibold text-ink">{title}</figcaption>
          {subtitle && <p className="mt-0.5 text-2xs text-muted">{subtitle}</p>}
        </div>
        <button
          type="button"
          className={`inline-flex flex-none items-center gap-1 rounded-[5px] border px-2 py-1 text-3xs font-semibold print:hidden ${showTable ? 'border-ink bg-ink text-white' : 'border-line text-muted hover:text-ink'}`}
          aria-pressed={showTable}
          onClick={() => setShowTable(!showTable)}
        >
          <Table2 size={12} /> Table
        </button>
      </div>
      {legend && legend.length > 1 && !showTable && (
        <ul className="mb-3 flex flex-wrap gap-x-4 gap-y-1 text-2xs text-body" aria-label="Legend">
          {legend.map((item) => (
            <li key={item.label} className="inline-flex items-center gap-1.5">
              {item.shape === 'line' ? <i className="h-0.5 w-3.5 rounded-full" style={{ background: item.color }} /> : <i className="size-2.5 rounded-[2px]" style={{ background: item.color }} />}
              {item.label}
            </li>
          ))}
        </ul>
      )}
      {showTable ? <DataTable data={table} /> : children}
    </figure>
  )
}

export function DataTable({ data }: { data: TableData }) {
  return (
    <div className="max-h-[320px] overflow-auto">
      <table className="w-full border-collapse text-2xs">
        <thead className="sticky top-0 bg-white">
          <tr>
            {data.columns.map((column, i) => (
              <th key={column} className={`border-b border-line px-2 py-1.5 font-semibold text-[#586762] ${i ? 'text-right' : 'text-left'}`}>
                {column}
              </th>
            ))}
          </tr>
        </thead>
        <tbody>
          {data.rows.map((row, r) => (
            <tr key={r}>
              {row.map((cell, i) => (
                <td key={i} className={`border-b border-line-soft px-2 py-1.5 text-body ${i ? 'text-right tabular-nums' : ''}`}>
                  {typeof cell === 'number' ? cell.toLocaleString('en-US', { maximumFractionDigits: 2 }) : cell}
                </td>
              ))}
            </tr>
          ))}
        </tbody>
      </table>
    </div>
  )
}

/** Tooltip: value first (strong), series second, keyed with a short line in the series color. */
export function Tooltip({ x, y, title, rows, containerWidth }: { x: number; y: number; title: string; rows: { label: string; value: string; color?: string }[]; containerWidth: number }) {
  const flip = x > containerWidth - 180
  return (
    <div
      className="pointer-events-none absolute z-10 min-w-[140px] rounded-md border border-line bg-white px-3 py-2 text-2xs shadow-[0_6px_20px_#1b252322]"
      style={{ left: flip ? undefined : x + 12, right: flip ? containerWidth - x + 12 : undefined, top: Math.max(0, y - 10) }}
      role="status"
    >
      <p className="mb-1 text-3xs text-muted">{title}</p>
      {rows.map((row) => (
        <p key={row.label} className="flex items-center gap-2">
          {row.color && <i className="h-0.5 w-3 flex-none rounded-full" style={{ background: row.color }} />}
          <strong className="font-semibold text-ink tabular-nums">{row.value}</strong>
          <span className="text-body">{row.label}</span>
        </p>
      ))}
    </div>
  )
}

export function ChartEmpty({ children }: { children: ReactNode }) {
  return <div className="grid min-h-[160px] place-items-center px-4 text-center text-2xs text-muted">{children}</div>
}