import { createElement } from 'react'
import type { Chapter } from '../../ui/types.ts'
import driver from '../onedim/driver.m?raw'
import script from './fd2.m?raw'
import text from './text.md?raw'
import { Convergence, Solution1D, fmtErr, type SingleOut, type SweepOut } from '../onedim/panels.tsx'
import { KIND_CONTROL, NS_1D } from '../shared.ts'

export const ch01: Chapter = {
  id: 'manufactured',
  nav: 'Ground truth by construction',
  part: 'One dimension',
  title: 'Ground truth by construction',
  blurb:
    'The one-dimensional model problem, the method of manufactured solutions, and the three-point difference scheme.',
  text,
  labs: [
    {
      id: 'first',
      title: 'One solve',
      caption: 'Move the resolution and change the solution being manufactured.',
      driver,
      script,
      controls: [
        KIND_CONTROL,
        {
          kind: 'slider',
          key: 'N',
          label: 'intervals N',
          min: 4,
          max: 128,
          values: [4, 8, 12, 16, 24, 32, 48, 64, 96, 128, 256],
        },
      ],
      defaults: { kind: 'smooth', mode: 'single', mid: 1, N: 16, ngrid: 700 },
      editorOpen: true,
      render: (d: SingleOut) => createElement(Solution1D, { data: d }),
      summary: (d: SingleOut) => [
        { label: 'unknowns', value: String(d.n - 1) },
        { label: 'max error', value: fmtErr(d.maxerr) },
      ],
    },
    {
      id: 'refine',
      title: 'Refinement study',
      caption: 'The same script, run over a sequence of meshes, with the observed order beside each error.',
      driver,
      script,
      controls: [KIND_CONTROL],
      defaults: { kind: 'smooth', mode: 'sweep', ns: NS_1D, nmaxs: [1e9, 1e9], timed: 0 },
      render: (d: SweepOut) =>
        createElement(Convergence, {
          data: d,
          style: { slots: ['fd2'], refs: [{ p: -2, label: 'slope -2' }] },
        }),
      summary: (d: SweepOut) => {
        const q = d.orders[0][d.orders[0].length - 1]
        return [
          { label: 'finest error', value: fmtErr(d.E[0][d.E[0].length - 1]) },
          { label: 'observed order', value: q == null ? '--' : q.toFixed(2) },
        ]
      },
    },
  ],
}