import assert from 'node:assert/strict'
import { createElement } from 'react'
import { renderToStaticMarkup } from 'react-dom/server'
import { MermaidSvgCache } from '../src/renderer/src/workbuddy/mermaid/cache'
import { MermaidBlock } from '../src/renderer/src/workbuddy/mermaid/MermaidBlock'
import {
  createMermaidRenderer,
  type MermaidApi,
  type MermaidConfiguration
} from '../src/renderer/src/workbuddy/mermaid/renderer'
import {
  isWidthDependentDiagram,
  normalizeMermaidCode
} from '../src/renderer/src/workbuddy/mermaid/sanitize'
import { remapSvgIdReferences } from '../src/renderer/src/workbuddy/mermaid/svg'
import {
  MERMAID_ACTIVATION_ROOT_MARGIN,
  MERMAID_VISIBLE_ROOT_MARGIN
} from '../src/renderer/src/workbuddy/mermaid/visibility'
import {
  MERMAID_WIDTH_DEBOUNCE_MS,
  shouldPublishMermaidWidth
} from '../src/renderer/src/workbuddy/mermaid/width'

const flowchart = normalizeMermaidCode('flowchart LR\nA["draft (one)"] --> B[\'two\']')
assert.equal(flowchart, 'flowchart LR\nA[draft one] --> B[two]')

const graph = normalizeMermaidCode('graph TD\nA["one"] --> B[\'two\']\nclick A "open \"details\""')
assert.match(graph, /A\[one\] --> B\[two\]/)
assert.ok(graph.includes("click A \"open 'details'\""))

const xychart = normalizeMermaidCode('xychart-beta\nx-axis "Quarter (Q1)" ["One", "Two"]')
assert.match(xychart, /x-axis ".*Quarter.*Q1.*" \[/)
assert.match(xychart, /_#40#_.*_#41#_/)
assert.equal(isWidthDependentDiagram('---\ntitle: Plan\n---\n%% note\ngantt\ndateFormat YYYY-MM-DD'), true)
assert.equal(isWidthDependentDiagram('flowchart LR\nA-->B'), false)
assert.equal(MERMAID_VISIBLE_ROOT_MARGIN, '320px')
assert.equal(MERMAID_ACTIVATION_ROOT_MARGIN, '320px 0px')
assert.equal(MERMAID_WIDTH_DEBOUNCE_MS, 360)
assert.equal(shouldPublishMermaidWidth(0, 1), true)
assert.equal(shouldPublishMermaidWidth(500, 515), false)
assert.equal(shouldPublishMermaidWidth(500, 516), true)

const ids = new Map([
  ['a', 'cr-mermaid-1-a'],
  ['long-id', 'cr-mermaid-1-long-id']
])
assert.equal(
  remapSvgIdReferences('fill="url(#a)" href="#long-id" url(#a-next)', ids),
  'fill="url(#cr-mermaid-1-a)" href="#cr-mermaid-1-long-id" url(#a-next)'
)
assert.equal(
  remapSvgIdReferences('url(#a.b) url(#axb)', new Map([['a.b', 'safe-a-b']])),
  'url(#safe-a-b) url(#axb)'
)

const lru = new MermaidSvgCache(1024, 2)
lru.set('one', '<svg>one</svg>')
lru.set('two', '<svg>two</svg>')
assert.equal(lru.get('one'), '<svg>one</svg>')
lru.set('three', '<svg>three</svg>')
assert.equal(lru.get('two'), undefined)
assert.equal(lru.size, 2)
assert.ok(lru.byteSize <= 1024)

const entryBounded = new MermaidSvgCache()
for (let index = 0; index < 65; index++) entryBounded.set(`diagram-${index}`, '<svg/>')
assert.equal(entryBounded.size, 64)
assert.equal(entryBounded.get('diagram-0'), undefined)

const oversized = new MermaidSvgCache(8, 4)
oversized.set('too-large-key', '<svg/>')
assert.equal(oversized.size, 0)

let activeRenders = 0
let maxActiveRenders = 0
const renderedCodes: string[] = []
const configurations: MermaidConfiguration[] = []
const fakeMermaid: MermaidApi = {
  initialize(configuration) { configurations.push(configuration) },
  async render(_id, code) {
    activeRenders++
    maxActiveRenders = Math.max(maxActiveRenders, activeRenders)
    renderedCodes.push(code)
    await new Promise((resolve) => setTimeout(resolve, 10))
    activeRenders--
    return { svg: `<svg>${code}</svg>` }
  }
}

const render = createMermaidRenderer()
const firstController = new AbortController()
const secondController = new AbortController()
const firstRender = render({
  mermaid: fakeMermaid,
  code: 'gantt\ntitle first',
  dark: true,
  width: 540,
  signal: firstController.signal
})
const secondRender = render({
  mermaid: fakeMermaid,
  code: 'flowchart LR\nA-->B',
  dark: false,
  width: 540,
  signal: secondController.signal
})
secondController.abort()
assert.equal(await firstRender, '<svg>gantt\ntitle first</svg>')
assert.equal(await secondRender, undefined)
assert.deepEqual(renderedCodes, ['gantt\ntitle first'])
assert.equal(maxActiveRenders, 1)
assert.equal(configurations[0].gantt.useWidth, 540)

const cacheHitController = new AbortController()
assert.equal(await render({
  mermaid: fakeMermaid,
  code: 'gantt\ntitle first',
  dark: true,
  width: 540,
  signal: cacheHitController.signal
}), '<svg>gantt\ntitle first</svg>')
assert.equal(renderedCodes.length, 1)

let releaseSlowRender: ((value: string) => void) | undefined
let slowStarted: (() => void) | undefined
const slowApi: MermaidApi = {
  initialize() {},
  render() {
    slowStarted?.()
    return new Promise<string>((resolve) => { releaseSlowRender = resolve })
  }
}
const staleController = new AbortController()
const staleRenderer = createMermaidRenderer()
const staleResult = staleRenderer({
  mermaid: slowApi,
  code: 'flowchart LR\nA-->B',
  dark: false,
  width: 800,
  signal: staleController.signal
})
await new Promise<void>((resolve) => { slowStarted = resolve })
staleController.abort()
releaseSlowRender?.('<svg>stale</svg>')
assert.equal(await staleResult, undefined)

const blockMarkup = renderToStaticMarkup(createElement(MermaidBlock, {
  code: 'flowchart LR\nA-->B',
  isRendering: false
}))
assert.match(blockMarkup, /cr-mermaid-block__tab--active/)
assert.match(blockMarkup, />图表</)
assert.match(blockMarkup, /data-mermaid-render-state="pending"/)

console.log('Mermaid cache, sanitizer, queue, and abort regression checks passed')