/* 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 trendOptionsFile = path.join(currentDir, '..', 'utils', 'trendOptions.ts')
const trendOptionsSource = fs.readFileSync(trendOptionsFile, 'utf8')

const expectations = [
    ['steady y-axis upper padding uses 1.15', /const\s+STEADY_AXIS_EXPAND_RATIO\s*=\s*1\.15/],
    ['steady y-axis lower padding uses 0.85', /const\s+STEADY_AXIS_SHRINK_RATIO\s*=\s*0\.85/],
    [
        'steady integer ranges still enter readable-axis normalization',
        /rawInterval\s*>=\s*STEADY_AXIS_SMALL_INTERVAL_THRESHOLD/,
        true
    ],
    ['steady y-axis keeps readable interval normalization', /getReadableAxisInterval\(axisRange\s*\/\s*currentSplitCount\)/],
    ['steady y-axis keeps min label visible', /showMinLabel:\s*true/],
    ['steady y-axis keeps max label visible', /showMaxLabel:\s*true/]
]

const failures = expectations.filter(([, pattern, shouldBeMissing]) => {
    const exists = pattern.test(trendOptionsSource)
    return shouldBeMissing ? exists : !exists
})

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

console.log('steady axis range contract check passed')