import { createI18n } from 'vue-i18n';

export const defaultLocale = 'en';
const localeStorageKey = 'pokopia_locale';
const localeChangeEvent = 'pokopia-locale-change';

const messages = {
  en: {
    common: {
      add: 'Add',
      admin: 'Admin',
      all: 'All',
      back: 'Back',
      backToList: 'Back to list',
      cancel: 'Cancel',
      close: 'Close',
      create: 'Create',
      delete: 'Delete',
      edit: 'Edit',
      filters: 'Filters',
      loading: 'Loading',
      name: 'Name',
      new: 'New',
      none: 'None',
      save: 'Save',
      saving: 'Saving',
      search: 'Search',
      select: 'Select',
      selected: 'Selected',
      system: 'System',
      noRecords: 'No records',
      fieldForLanguage: '{field} ({language})',
      searchOrSelect: 'Search or select',
      noMatches: 'No matches',
      createNamed: 'Add "{name}"',
      creating: 'Adding',
      removeNamed: 'Remove {name}',
      quantity: 'Quantity',
      required: 'Required'
    },
    nav: {
      pokemon: 'Pokemon',
      habitats: 'Habitats',
      items: 'Items',
      recipes: 'Recipes',
      checklist: 'CheckList',
      admin: 'Admin',
      main: 'Main navigation',
      language: 'Language',
      login: 'Log in',
      logout: 'Log out',
      register: 'Register'
    },
    auth: {
      email: 'Email',
      password: 'Password',
      displayName: 'Display name',
      loginTitle: 'Log in',
      loginSubtitle: 'Use a verified email to enter Pokopia Wiki.',
      loggingIn: 'Logging in',
      loginFailed: 'Login failed',
      noAccount: 'No account yet?',
      registerTitle: 'Register',
      registerSubtitle: 'Verify your email after creating an account.',
      registerFailed: 'Registration failed',
      sending: 'Sending',
      sendVerification: 'Send verification email',
      hasAccount: 'Already have an account?',
      verifyTitle: 'Email verification',
      verifySubtitle: 'You can log in after verification is complete.',
      verifyingEmail: 'Verifying email',
      invalidVerification: 'The verification link is invalid or expired.',
      verifyFailed: 'Email verification failed',
      goLogin: 'Go to login'
    },
    errors: {
      requestFailed: 'Request failed ({status})',
      operationFailed: 'Operation failed',
      loadFailed: 'Load failed',
      addFailed: 'Add failed',
      saveFailed: 'Save failed',
      completeEmailVerification: 'Please complete email verification first.'
    },
    pages: {
      pokemon: {
        title: 'Pokemon',
        subtitle: 'Search Pokemon and filter by specialities, ideal habitat, and favourites.',
        detailKicker: 'Pokédex Detail',
        editKicker: 'Pokédex Edit',
        editSubtitle: 'Maintain Pokemon profile, specialities, and favourites.',
        newTitle: 'New Pokemon',
        editTitle: 'Edit #{id} {name}',
        loadingList: 'Loading Pokemon list',
        loadingDetail: 'Loading Pokemon detail',
        loadingEdit: 'Loading Pokemon editor',
        environmentPrefix: 'Ideal Habitat: {name}',
        environment: 'Ideal Habitat',
        skills: 'Specialities',
        skillMatchMode: 'Speciality match mode',
        any: 'Any',
        all: 'All',
        favoriteThings: 'Favourites',
        favoriteThingMatchMode: 'Favourites match mode',
        skillDrops: 'Speciality drops',
        skillDrop: '{name} drop',
        dropItem: 'Drop item',
        searchPokemon: 'Search Pokemon',
        relatedItems: 'Related items',
        relatedItemCategory: 'Related item category',
        habitats: 'Habitats',
        namePlaceholder: 'Name',
        searchEnvironment: 'Search ideal habitats',
        searchSkills: 'Search specialities',
        searchFavoriteThings: 'Search favourites',
        searchItems: 'Search items'
      },
      habitats: {
        title: 'Habitats',
        subtitle: 'View recipes and Pokemon that may appear.',
        detailSubtitle: 'Habitat detail',
        editSubtitle: 'Maintain habitat recipes and possible Pokemon appearances.',
        newTitle: 'New habitat',
        editTitle: 'Edit {name}',
        fallbackName: 'Habitat',
        loadingList: 'Loading habitat list',
        loadingDetail: 'Loading habitat detail',
        loadingEdit: 'Loading habitat editor',
        recipe: 'Recipe',
        recipeList: 'Recipe list',
        possiblePokemon: 'Possible Pokemon',
        addItem: 'Add item',
        addPokemon: 'Add Pokemon',
        maps: 'Maps',
        searchMaps: 'Search maps'
      },
      items: {
        title: 'Items',
        subtitle: 'Browse items by category, usage, and tags.',
        detailKicker: 'Item Detail',
        detailSubtitle: 'Item detail',
        editKicker: 'Item Edit',
        editSubtitle: 'Maintain item category, usage, acquisition methods, customization, and tags.',
        newTitle: 'New item',
        editTitle: 'Edit {name}',
        fallbackName: 'Item',
        loadingList: 'Loading item list',
        loadingDetail: 'Loading item detail',
        loadingEdit: 'Loading item editor',
        category: 'Category',
        usage: 'Usage',
        tags: 'Tags',
        acquisitionMethods: 'Acquisition methods',
        customization: 'Customization',
        dyeable: 'Dyeable',
        dualDyeable: 'Dual dyeable',
        patternEditable: 'Pattern editable',
        noRecipe: 'No recipe',
        recipeInfo: 'Recipe info',
        relatedRecipes: 'Related recipes',
        relatedHabitats: 'Related habitats',
        pokemonDrops: 'Pokemon drops',
        createRecipe: 'Create recipe',
        searchCategory: 'Search categories',
        searchUsage: 'Search usages',
        searchMethods: 'Search acquisition methods',
        searchTags: 'Search tags'
      },
      recipes: {
        title: 'Recipes',
        subtitle: 'Browse recipes by category, usage, and tags.',
        detailKicker: 'Recipe Detail',
        detailSubtitle: 'Recipe detail',
        editKicker: 'Recipe Edit',
        editSubtitle: 'Maintain result item, acquisition methods, and materials.',
        newTitle: 'New recipe',
        editTitle: 'Edit {name}',
        fallbackName: 'Recipe',
        loadingList: 'Loading recipe list',
        loadingDetail: 'Loading recipe detail',
        loadingEdit: 'Loading recipe editor',
        item: 'Item',
        materials: 'Materials',
        addMaterial: 'Add material'
      },
      checklist: {
        title: 'Daily checklist',
        subtitle: 'See what can be completed each day.',
        sectionTitle: 'Daily tasks',
        empty: 'No daily checklist',
        loading: 'Loading daily checklist',
        task: 'Task',
        newTask: 'New task',
        editTask: 'Edit task'
      },
      admin: {
        title: 'Admin',
        subtitle: 'Maintain system configuration and manage Wiki records.',
        modules: 'Admin modules',
        loading: 'Loading admin list',
        config: 'System config',
        configType: 'System config type',
        checklist: 'CheckList',
        pokemonList: 'Pokemon list',
        itemList: 'Item list',
        recipeList: 'Recipe list',
        habitatList: 'Habitat list',
        languages: 'Languages',
        newConfig: 'New {name}',
        editConfig: 'Edit {name}',
        hasItemDrop: 'Has item drop',
        dragSort: 'Drag to reorder: {name}',
        dragSortTitle: 'Drag to reorder',
        languageCode: 'Code',
        languageName: 'Language name',
        enabled: 'Enabled',
        defaultLanguage: 'Default language',
        sortOrder: 'Sort order',
        newLanguage: 'New language',
        editLanguage: 'Edit language'
      }
    },
    config: {
      skills: 'Specialities',
      environments: 'Ideal Habitats',
      favoriteThings: 'Favourites / tags',
      itemCategories: 'Item categories',
      itemUsages: 'Item usages',
      acquisitionMethods: 'Acquisition methods',
      maps: 'Maps'
    },
    appearance: {
      time: 'Time',
      weather: 'Weather',
      rarity: 'Rarity',
      map: 'Map',
      maps: 'Maps',
      morning: 'Morning',
      noon: 'Noon',
      evening: 'Evening',
      night: 'Night',
      sunny: 'Sunny',
      cloudy: 'Cloudy',
      rainy: 'Rainy',
      stars: '{count} stars'
    },
    history: {
      title: 'Contribution records',
      createdBy: 'Created by',
      lastEdited: 'Last edited',
      editHistory: 'Edit history',
      before: 'Before',
      after: 'After',
      author: 'Author',
      time: 'Time',
      action: 'Action',
      create: 'Create',
      update: 'Edit',
      delete: 'Delete',
      empty: 'No edit history'
    }
  },
  'zh-CN': {
    common: {
      add: '添加',
      admin: '管理',
      all: '全部',
      back: '返回',
      backToList: '返回列表',
      cancel: '取消',
      close: '关闭',
      create: '创建',
      delete: '删除',
      edit: '编辑',
      filters: '筛选',
      loading: '加载中',
      name: '名称',
      new: '新建',
      none: '无',
      save: '保存',
      saving: '保存中',
      search: '搜索',
      select: '请选择',
      selected: '已选',
      system: '系统',
      noRecords: '暂无记录',
      fieldForLanguage: '{field}（{language}）',
      searchOrSelect: '搜索或选择',
      noMatches: '没有匹配项',
      createNamed: '添加「{name}」',
      creating: '添加中',
      removeNamed: '移除{name}',
      quantity: '数量',
      required: '必填'
    },
    nav: {
      pokemon: 'Pokemon',
      habitats: '栖息地',
      items: '物品',
      recipes: '材料单',
      checklist: 'CheckList',
      admin: '管理',
      main: '主导航',
      language: '语言',
      login: '登录',
      logout: '退出',
      register: '注册'
    },
    auth: {
      email: '邮箱',
      password: '密码',
      displayName: '显示名',
      loginTitle: '登录',
      loginSubtitle: '使用已验证邮箱进入 Pokopia Wiki',
      loggingIn: '登录中',
      loginFailed: '登录失败',
      noAccount: '还没有账号？',
      registerTitle: '注册',
      registerSubtitle: '创建账号后需要完成邮箱验证',
      registerFailed: '注册失败',
      sending: '发送中',
      sendVerification: '发送验证邮件',
      hasAccount: '已有账号？',
      verifyTitle: '邮箱验证',
      verifySubtitle: '完成验证后即可登录',
      verifyingEmail: '正在验证邮箱',
      invalidVerification: '验证链接无效或已过期',
      verifyFailed: '邮箱验证失败',
      goLogin: '去登录'
    },
    errors: {
      requestFailed: '请求失败（{status}）',
      operationFailed: '操作失败',
      loadFailed: '加载失败',
      addFailed: '添加失败',
      saveFailed: '保存失败',
      completeEmailVerification: '请先完成邮箱验证'
    },
    pages: {
      pokemon: {
        title: 'Pokemon',
        subtitle: '搜索宝可梦，并按特长、环境、喜欢的东西筛选。',
        detailKicker: 'Pokédex Detail',
        editKicker: 'Pokédex Edit',
        editSubtitle: '维护 Pokemon 基本资料、特长和喜欢的东西。',
        newTitle: '新增 Pokemon',
        editTitle: '编辑 #{id} {name}',
        loadingList: '正在加载 Pokemon 列表',
        loadingDetail: '正在加载 Pokemon 详情',
        loadingEdit: '正在加载 Pokemon 编辑内容',
        environmentPrefix: '喜欢的环境：{name}',
        environment: '喜欢的环境',
        skills: '特长',
        skillMatchMode: '特长匹配方式',
        any: '任意',
        all: '全部',
        favoriteThings: '喜欢的东西',
        favoriteThingMatchMode: '喜欢的东西匹配方式',
        skillDrops: '特长掉落物',
        skillDrop: '{name}掉落物',
        dropItem: '掉落物',
        searchPokemon: '搜索 Pokemon',
        relatedItems: '关联物品',
        relatedItemCategory: '关联物品分类',
        habitats: '栖息地',
        namePlaceholder: '名字',
        searchEnvironment: '搜索喜欢的环境',
        searchSkills: '搜索特长',
        searchFavoriteThings: '搜索喜欢的东西',
        searchItems: '搜索物品'
      },
      habitats: {
        title: '栖息地',
        subtitle: '查看配方和可能出现的宝可梦。',
        detailSubtitle: '栖息地详情',
        editSubtitle: '维护栖息地配方和可能出现的 Pokemon。',
        newTitle: '新增栖息地',
        editTitle: '编辑 {name}',
        fallbackName: '栖息地',
        loadingList: '正在加载栖息地列表',
        loadingDetail: '正在加载栖息地详情',
        loadingEdit: '正在加载栖息地编辑内容',
        recipe: '配方',
        recipeList: '配方列表',
        possiblePokemon: '可能出现的宝可梦',
        addItem: '添加物品',
        addPokemon: '添加 Pokemon',
        maps: '地图',
        searchMaps: '搜索地图'
      },
      items: {
        title: '物品',
        subtitle: '按分类、用途、标签查看物品。',
        detailKicker: 'Item Detail',
        detailSubtitle: '物品详情',
        editKicker: 'Item Edit',
        editSubtitle: '维护物品分类、用途、入手方式、自定义和标签。',
        newTitle: '新增物品',
        editTitle: '编辑 {name}',
        fallbackName: '物品',
        loadingList: '正在加载列表',
        loadingDetail: '正在加载物品详情',
        loadingEdit: '正在加载物品编辑内容',
        category: '分类',
        usage: '用途',
        tags: '标签',
        acquisitionMethods: '入手方式',
        customization: '自定义',
        dyeable: '可染色',
        dualDyeable: '可双区染色',
        patternEditable: '可改花纹',
        noRecipe: '无材料单',
        recipeInfo: '材料单信息',
        relatedRecipes: '相关材料单',
        relatedHabitats: '相关栖息地',
        pokemonDrops: 'Pokemon 掉落',
        createRecipe: '创建材料单',
        searchCategory: '搜索分类',
        searchUsage: '搜索用途',
        searchMethods: '搜索入手方式',
        searchTags: '搜索标签'
      },
      recipes: {
        title: '材料单',
        subtitle: '按分类、用途、标签查看材料单。',
        detailKicker: 'Recipe Detail',
        detailSubtitle: '材料单详情',
        editKicker: 'Recipe Edit',
        editSubtitle: '维护材料单结果物品、入手方式和需要材料。',
        newTitle: '新增材料单',
        editTitle: '编辑 {name}',
        fallbackName: '材料单',
        loadingList: '正在加载材料单列表',
        loadingDetail: '正在加载材料单详情',
        loadingEdit: '正在加载材料单编辑内容',
        item: '物品',
        materials: '需要材料',
        addMaterial: '添加材料'
      },
      checklist: {
        title: '每日清单',
        subtitle: '查看每天可以完成的事项。',
        sectionTitle: '每日做什么',
        empty: '暂无每日清单',
        loading: '正在加载每日清单',
        task: 'Task',
        newTask: '新增 Task',
        editTask: '编辑 Task'
      },
      admin: {
        title: '管理',
        subtitle: '维护系统配置，查看并删除 Wiki 数据记录。',
        modules: '管理模块',
        loading: '正在加载管理列表',
        config: '系统配置',
        configType: '系统配置类型',
        checklist: 'CheckList',
        pokemonList: 'Pokemon 列表',
        itemList: '物品列表',
        recipeList: '材料单列表',
        habitatList: '栖息地列表',
        languages: '语言',
        newConfig: '新增{name}',
        editConfig: '编辑{name}',
        hasItemDrop: '有掉落物',
        dragSort: '拖曳排序：{name}',
        dragSortTitle: '拖曳排序',
        languageCode: 'Code',
        languageName: '语言名称',
        enabled: '启用',
        defaultLanguage: '默认语言',
        sortOrder: '排序',
        newLanguage: '新增语言',
        editLanguage: '编辑语言'
      }
    },
    config: {
      skills: '特长',
      environments: '喜欢的环境',
      favoriteThings: '喜欢的东西 / 标签',
      itemCategories: '物品分类',
      itemUsages: '物品用途',
      acquisitionMethods: '入手方式',
      maps: '地图'
    },
    appearance: {
      time: '时段',
      weather: '天气',
      rarity: '稀有度',
      map: '地图',
      maps: '出现地图',
      morning: '早晨',
      noon: '中午',
      evening: '傍晚',
      night: '晚上',
      sunny: '晴天',
      cloudy: '阴天',
      rainy: '雨天',
      stars: '{count} 星'
    },
    history: {
      title: '贡献记录',
      createdBy: '由谁创建',
      lastEdited: '最后编辑',
      editHistory: '编辑历史',
      before: '修改前',
      after: '修改后',
      author: '作者',
      time: '时间',
      action: '动作',
      create: '创建',
      update: '编辑',
      delete: '删除',
      empty: '暂无编辑历史'
    }
  }
};

export type MessageKey = keyof typeof messages.en;

export const i18n = createI18n({
  legacy: false,
  globalInjection: true,
  locale: readStoredLocale(),
  fallbackLocale: defaultLocale,
  messages
});

function readStoredLocale(): string {
  if (typeof localStorage === 'undefined') {
    return defaultLocale;
  }

  const storedLocale = localStorage.getItem(localeStorageKey);
  return storedLocale && storedLocale.trim() !== '' ? storedLocale : defaultLocale;
}

function globalLocaleRef() {
  return i18n.global.locale as unknown as { value: string };
}

export function getCurrentLocale(): string {
  return globalLocaleRef().value || defaultLocale;
}

export function setCurrentLocale(locale: string): void {
  const nextLocale = locale || defaultLocale;
  globalLocaleRef().value = nextLocale;

  if (typeof document !== 'undefined') {
    document.documentElement.lang = nextLocale;
  }

  if (typeof localStorage !== 'undefined') {
    localStorage.setItem(localeStorageKey, nextLocale);
  }

  if (typeof window !== 'undefined') {
    window.dispatchEvent(new Event(localeChangeEvent));
  }
}

export function onLocaleChange(callback: () => void): () => void {
  window.addEventListener(localeChangeEvent, callback);
  return () => window.removeEventListener(localeChangeEvent, callback);
}

setCurrentLocale(getCurrentLocale());