import { createI18n } from 'vue-i18n'

import en from './locales/en'
import zh from './locales/zh'

export type UiLocale = 'en' | 'zh'

// 从持久化的 pinia 设置中读取界面语言，默认英文
function getInitialLocale(): UiLocale {
    try {
        const raw = localStorage.getItem('settings')
        if (raw) {
            const parsed = JSON.parse(raw)
            const ui = parsed?.uiLanguage
            if (ui === 'en' || ui === 'zh') return ui
        }
    } catch (e) {
        // ignore
    }
    return 'zh'
}

const i18n = createI18n({
    legacy: false,
    globalInjection: true,
    locale: getInitialLocale(),
    fallbackLocale: 'en',
    messages: { en, zh },
})

export function setUiLocale(locale: UiLocale) {
    i18n.global.locale.value = locale
}

export default i18n