import fs from 'node:fs'
import path from 'node:path'
import notificationRules from '../src/config/notificationRules.js'

const rootDir = path.resolve(import.meta.dirname, '..')
const targetFile = path.join(
  rootDir,
  'android',
  'app',
  'src',
  'main',
  'java',
  'com',
  'echo',
  'app',
  'notification',
  'NotificationRuleData.kt',
)

const toKotlinString = (value) => JSON.stringify(value).replace(/\$/g, '\\$')

const toKotlinStringList = (values = []) =>
  values.length ? `listOf(${values.map((value) => toKotlinString(value)).join(', ')})` : 'emptyList()'

const toKotlinRegex = (spec) => {
  if (!spec?.pattern) return 'null'
  const flags = spec.flags?.includes('i') ? ', setOf(RegexOption.IGNORE_CASE)' : ''
  return `Regex(${toKotlinString(spec.pattern)}${flags})`
}

const toOptionalString = (value) => (value ? toKotlinString(value) : 'null')

const toRuleBlock = (rule) => `        NotificationRuleDefinition(
            id = ${toKotlinString(rule.id)},
            label = ${toKotlinString(rule.label)},
            channels = ${toKotlinStringList(rule.channels)},
            keywords = ${toKotlinStringList(rule.keywords)},
            requiredTextPatterns = ${toKotlinStringList(rule.requiredTextPatterns)},
            direction = NotificationRuleDirection.${rule.direction === 'income' ? 'INCOME' : 'EXPENSE'},
            entryType = ${toKotlinString(rule.entryType || 'expense')},
            fundSourceType = ${toKotlinString(rule.fundSourceType || 'cash')},
            fundSourceName = ${toOptionalString(rule.fundSourceName)},
            fundSourceNameFromChannel = ${rule.fundSourceNameFromChannel ? 'true' : 'false'},
            fundTargetType = ${toKotlinString(rule.fundTargetType || 'merchant')},
            fundTargetName = ${toOptionalString(rule.fundTargetName)},
            fundTargetNameFromChannel = ${rule.fundTargetNameFromChannel ? 'true' : 'false'},
            impactExpense = ${rule.impactExpense === false ? 'false' : 'true'},
            impactIncome = ${rule.impactIncome ? 'true' : 'false'},
            defaultCategory = ${toKotlinString(rule.defaultCategory)},
            autoCapture = ${rule.autoCapture ? 'true' : 'false'},
            merchantPattern = ${toKotlinRegex(rule.merchantPattern)},
            defaultMerchant = ${toOptionalString(rule.defaultMerchant)},
        )`

const content = `package com.echo.app.notification

// Generated from src/config/notificationRules.js by scripts/sync-notification-rules.mjs.
internal object NotificationRuleData {
    val fallbackRules: List<NotificationRuleDefinition> = listOf(
${notificationRules.map(toRuleBlock).join(',\n')}
    )
}
`

fs.writeFileSync(targetFile, content)
console.log(`[rules:sync] wrote ${path.relative(rootDir, targetFile)}`)