/**
 * Soma ↔ morfo attribute-duplication audit.
 *
 * "Morfo declares, soma executes." A provider should not re-declare in its
 * `props` getter an attr the morfo already declares with a resolvable value —
 * spread `runtimePart.renderProps()` instead. This script flags every such
 * duplication so the migration backlog is measurable and new drift is caught.
 *
 * For each morfo at `src/uix/morfo/components/*.ts`:
 *   1. compile it → per part, the set of attrs it declares WITH a value
 *      (compiled staticAttrs + dynamicAttrs; no-value contract attrs like a
 *      bare `data-disabled` are excluded — those are legitimately soma-owned).
 *   2. read the matching soma provider, split it into segments by each
 *      `runtime.part('<kebab>', …)` call, and scan each segment for hardcoded
 *      attr literals (`role:` / `type:` / `'aria-*':` / `'data-*':`).
 *   3. report (component · part · attr) where the attr is BOTH hardcoded AND
 *      morfo-declared.
 *
 * Some hits are legitimate value overrides (e.g. a locale-formatted
 * `aria-valuetext` over the morfo's raw value) — those are reviewed during the
 * rollout. The number trends to zero as providers adopt `renderProps()`.
 *
 * Usage: `npx tsx scripts/soma-attr-audit.ts [--component <kebab>]`
 */
import { readdirSync, readFileSync, existsSync } from 'node:fs'
import { join } from 'node:path'
import { pathToFileURL } from 'node:url'
import { compileMorfo } from '../src/uix/morfo/compile'
import type { Morfo } from '../src/uix/morfo/types'

const MORFOS_DIR = 'src/uix/morfo/components'
const SOMA_DIR = 'src/uix/soma/components'
const ATTR_KEY = /^\s*'?(role|type|aria-[a-z-]+|data-[a-z-]+)'?\s*:/
const PART_CALL = /runtime\.part\(\s*'([a-z-]+)'/g

export async function loadMorfos(): Promise<Morfo[]> {
	const out: Morfo[] = []
	for (const f of readdirSync(MORFOS_DIR).filter((f) => f.endsWith('.ts') && !f.endsWith('.test.ts'))) {
		const mod = (await import(pathToFileURL(join(MORFOS_DIR, f)).href)) as Record<string, unknown>
		for (const v of Object.values(mod)) {
			if (typeof v === 'object' && v !== null && 'kebab' in v && 'parts' in v) out.push(v as Morfo)
		}
	}
	return out
}

/** Attrs the compiled part declares with a resolvable value (excludes no-value contract attrs). */
function declaredAttrs(morfo: Morfo, partKebab: string): Set<string> {
	const compiled = compileMorfo(morfo)
	const part = compiled.parts.byKebab.get(partKebab) as
		| { staticAttrs?: Record<string, unknown>; dynamicAttrs?: { attr: string }[] }
		| undefined
	const set = new Set<string>()
	if (!part) return set
	for (const k of Object.keys(part.staticAttrs ?? {})) set.add(k)
	for (const d of part.dynamicAttrs ?? []) set.add(d.attr)
	return set
}

/** Read every provider source file for a component (glob `*-provider.svelte.ts`). */
function providerSources(kebab: string): string {
	const dir = join(SOMA_DIR, kebab)
	if (!existsSync(dir)) return ''
	return readdirSync(dir)
		.filter((f) => f.endsWith('-provider.svelte.ts'))
		.map((f) => readFileSync(join(dir, f), 'utf8'))
		.join('\n')
}

type Hit = { component: string; part: string; attr: string }

export function auditComponent(morfo: Morfo): Hit[] {
	const src = providerSources(morfo.kebab)
	if (!src) return []
	// Segment the source by `runtime.part('X')`: each segment's hardcoded attrs
	// belong to part X (the props getter sits between this call and the next).
	const calls = [...src.matchAll(PART_CALL)]
	if (calls.length === 0) return []
	const hits: Hit[] = []
	for (let i = 0; i < calls.length; i++) {
		const partKebab = calls[i][1]
		const start = calls[i].index ?? 0
		const end = i + 1 < calls.length ? (calls[i + 1].index ?? src.length) : src.length
		const segment = src.slice(start, end)
		const declared = declaredAttrs(morfo, partKebab)
		if (declared.size === 0) continue
		for (const line of segment.split('\n')) {
			const m = ATTR_KEY.exec(line)
			if (m && declared.has(m[1])) hits.push({ component: morfo.kebab, part: partKebab, attr: m[1] })
		}
	}
	return hits
}

async function main() {
	const onlyArg = process.argv.indexOf('--component')
	const only = onlyArg >= 0 ? process.argv[onlyArg + 1] : undefined
	const morfos = (await loadMorfos()).filter((m) => !only || m.kebab === only)

	const byComponent = new Map<string, Hit[]>()
	for (const m of morfos) {
		const hits = auditComponent(m)
		if (hits.length) byComponent.set(m.kebab, hits)
	}

	const total = [...byComponent.values()].reduce((n, h) => n + h.length, 0)
	const sorted = [...byComponent.entries()].sort((a, b) => b[1].length - a[1].length)

	console.log(`\nSoma↔morfo attr duplication — ${total} hits across ${byComponent.size} components\n`)
	for (const [component, hits] of sorted) {
		const byPart = new Map<string, string[]>()
		for (const h of hits) (byPart.get(h.part) ?? byPart.set(h.part, []).get(h.part)!).push(h.attr)
		console.log(`  ${component}  (${hits.length})`)
		for (const [part, attrs] of byPart) console.log(`    ${part}: ${attrs.join(', ')}`)
	}
	console.log('')
}

// Run only when invoked directly (`tsx scripts/soma-attr-audit.ts`), not on import.
if (process.argv[1] && import.meta.url === pathToFileURL(process.argv[1]).href) main()