/* eslint-env node */
import fs from 'node:fs'
import path from 'node:path'
import { fileURLToPath } from 'node:url'

const currentDir = path.dirname(fileURLToPath(import.meta.url))
const componentDir = path.join(currentDir, '..', 'components')

const read = file => fs.readFileSync(path.join(componentDir, file), 'utf8')
const pageSource = fs.readFileSync(path.join(currentDir, '..', 'index.vue'), 'utf8')
const selectionRulesSource = fs.readFileSync(path.join(currentDir, '..', 'utils', 'selectionRules.ts'), 'utf8')

const expectations = [
    [
        'ledger tree excludes half-checked parents when collecting checked nodes',
        /getCheckedNodes\(\s*false\s*,\s*false\s*\)/,
        read('SteadyLedgerTree.vue')
    ],
    [
        'indicator tree excludes half-checked parents when collecting checked nodes',
        /getCheckedNodes\(\s*false\s*,\s*false\s*\)/,
        read('SteadyIndicatorTree.vue')
    ],
    [
        'selection rules expose the first selectable ledger resolver',
        /export const findFirstSelectableLedgerNode/,
        selectionRulesSource
    ],
    [
        'selection rules expose the first leaf indicator resolver',
        /export const findFirstLeafIndicator/,
        selectionRulesSource
    ],
    [
        'steady page applies default selected ledger keys after ledger tree load',
        /defaultLedgerCheckedKeys\.value\s*=/,
        pageSource
    ],
    [
        'steady page applies default selected indicator keys after indicator tree load',
        /defaultIndicatorCheckedKeys\.value\s*=/,
        pageSource
    ],
    ['ledger tree receives default checked keys', /defaultCheckedKeys/, read('SteadyLedgerTree.vue')],
    [
        'ledger tree renders level icons',
        /<component\s+:is="resolveLedgerIcon\(data\.level\)"/,
        read('SteadyLedgerTree.vue')
    ],
    [
        'ledger tree resolves icons by ledger level',
        /const\s+ledgerIcons[\s\S]*0:[\s\S]*1:[\s\S]*2:[\s\S]*3:/,
        read('SteadyLedgerTree.vue')
    ],
    ['indicator tree receives default checked keys', /defaultCheckedKeys/, read('SteadyIndicatorTree.vue')],
    [
        'selection rules dedupe leaf indicators collected from checked parents and children',
        /seenIndicatorKeys[\s\S]*node\.indicatorCode[\s\S]*seenIndicatorKeys\.has[\s\S]*seenIndicatorKeys\.add/,
        selectionRulesSource
    ]
]

const failures = expectations.filter(([, pattern, source]) => !pattern.test(source))

if (failures.length) {
    console.error('steadyTrend selection contract failed:')
    for (const [name] of failures) {
        console.error(`- ${name}`)
    }
    process.exit(1)
}

console.log('steadyTrend selection contract passed')