/**
 * 主题 / 页签状态（精简版，对齐 WT 布局所需能力）
 */
import {
  screenWidth,
  screenHeight,
  contentWidth,
  contentHeight,
} from 'ele-admin';
import {
  TAB_KEEP_ALIVE,
  KEEP_ALIVE_EXCLUDES,
  getThemeStoreName,
  HOME_PATH,
  LAYOUT_PATH,
  isHomeAliasPath,
} from '@/config/setting';
import Vue from 'vue';

const HOME_ROUTE = HOME_PATH || '/home/index';

function isHomeTabKey(key) {
  if (!key) return false;
  if (key === LAYOUT_PATH || key === '/') return true;
  const pathOnly = String(key).split('?')[0];
  return isHomeAliasPath(pathOnly) || pathOnly === HOME_ROUTE;
}

function withoutHomeTabs(tabs = []) {
  return (tabs || []).filter(
    (tab) =>
      tab &&
      !isHomeTabKey(tab.key) &&
      !isHomeTabKey(tab.path) &&
      !isHomeTabKey(tab.fullPath),
  );
}

const DEFAULT_STATE = Object.freeze({
  tabs: [],
  collapse: false,
  sideNavCollapse: false,
  bodyFullscreen: false,
  showTabs: true,
  showFooter: false,
  headStyle: 'light',
  sideStyle: 'dark',
  layoutStyle: 'side',
  sideMenuStyle: 'default',
  tabStyle: 'card',
  transitionName: 'slide-right',
  fixedHeader: false,
  fixedSidebar: true,
  fixedBody: true,
  bodyFull: true,
  logoAutoSize: false,
  colorfulIcon: false,
  sideUniqueOpen: true,
  weakMode: false,
  darkMode: false,
  color: null,
  homeComponents: [],
  routeReload: null,
  screenWidth: screenWidth(),
  screenHeight: screenHeight(),
  contentWidth: contentWidth(),
  contentHeight: contentHeight(),
  styleResponsive: true,
});

function getCacheSetting() {
  try {
    const value = localStorage.getItem(getThemeStoreName());
    if (value) {
      const cache = JSON.parse(value);
      if (typeof cache === 'object' && cache !== null) return cache;
    }
  } catch (e) {
    console.error(e);
  }
  return {};
}

function cacheSetting(key, value) {
  const cache = getCacheSetting();
  if (cache[key] !== value) {
    cache[key] = value;
    localStorage.setItem(getThemeStoreName(), JSON.stringify(cache));
  }
}

export default {
  namespaced: true,
  state: (() => {
    const state = { ...DEFAULT_STATE };
    const cache = getCacheSetting();
    Object.keys(state).forEach((key) => {
      // 不从本地恢复页签：刷新后容易残留旧路径面包屑（如资质证照/新增）
      if (key === 'tabs' || key === 'homeComponents' || key === 'routeReload') {
        return;
      }
      if (typeof cache[key] !== 'undefined') state[key] = cache[key];
    });
    state.tabs = [];
    return state;
  })(),
  getters: {
    keepAliveInclude(state) {
      if (!TAB_KEEP_ALIVE || !state.showTabs) return [];
      const components = new Set();
      const { reloadPath } = state.routeReload || {};
      state.tabs?.forEach((t) => {
        const isAlive = t.meta?.keepAlive !== false;
        const isExclude = KEEP_ALIVE_EXCLUDES.includes(t.path);
        const isReload = reloadPath && reloadPath === t.fullPath;
        if (isAlive && !isExclude && !isReload && t.components) {
          t.components.forEach((c) => {
            if (typeof c === 'string' && c) components.add(c);
          });
        }
      });
      state.homeComponents?.forEach((c) => {
        if (typeof c === 'string' && c) {
          if (!state.routeReload?.reloadHome) components.add(c);
        }
      });
      return Array.from(components);
    },
  },
  mutations: {
    SET(state, { key, value }) {
      state[key] = value;
    },
  },
  actions: {
    setCollapse({ commit }, value) {
      commit('SET', { key: 'collapse', value });
      cacheSetting('collapse', value);
    },
    setSideNavCollapse({ commit }, value) {
      commit('SET', { key: 'sideNavCollapse', value });
      cacheSetting('sideNavCollapse', value);
    },
    setBodyFullscreen({ commit }, value) {
      commit('SET', { key: 'bodyFullscreen', value });
      cacheSetting('bodyFullscreen', value);
    },
    setTabs({ commit }, value) {
      commit('SET', { key: 'tabs', value: withoutHomeTabs(value) });
    },
    tabAdd({ state, commit }, data) {
      if (!data) return;
      if (
        isHomeTabKey(data.key) ||
        isHomeTabKey(data.path) ||
        isHomeTabKey(data.fullPath)
      ) {
        return;
      }
      const tabs = withoutHomeTabs(state.tabs || []);
      const index = tabs.findIndex((t) => t.key === data.key);
      if (index === -1) {
        commit('SET', { key: 'tabs', value: [...tabs, data] });
      } else {
        const next = tabs.slice();
        next[index] = { ...next[index], ...data };
        commit('SET', { key: 'tabs', value: next });
      }
    },
    tabRemove({ state, commit }, { key, active }) {
      // 与 EOM 一致：乾坤下页签由门户管理
      if (window.__POWERED_BY_QIANKUN__) {
        return Vue.prototype.$portalStore?.dispatch('theme/tabRemove', {
          key,
          active,
        });
      }
      if (isHomeTabKey(key)) return Promise.reject();
      const tabs = withoutHomeTabs(state.tabs || []);
      const index = tabs.findIndex((t) => t.key === key);
      if (index === -1) return Promise.reject();
      const target = tabs[index];
      if (target?.closable === false) return Promise.reject();
      const next = tabs.filter((t) => t.key !== key);
      commit('SET', { key: 'tabs', value: next });
      if (active === key) {
        const fallback = next[index] || next[index - 1];
        return Promise.resolve({
          path: fallback?.fullPath || fallback?.key,
          home: !fallback,
        });
      }
      return Promise.resolve({});
    },
    tabRemoveLeft({ state, commit }, { key, active }) {
      const tabs = withoutHomeTabs(state.tabs || []);
      const index = tabs.findIndex((t) => t.key === key);
      if (index <= 0) return Promise.reject();
      const next = tabs.slice(index);
      commit('SET', { key: 'tabs', value: next });
      if (!next.some((t) => t.key === active)) {
        return Promise.resolve({ path: next[0]?.fullPath || next[0]?.key });
      }
      return Promise.resolve({});
    },
    tabRemoveRight({ state, commit }, { key, active }) {
      const tabs = withoutHomeTabs(state.tabs || []);
      const index = tabs.findIndex((t) => t.key === key);
      if (index === -1 || index >= tabs.length - 1) return Promise.reject();
      const next = tabs.slice(0, index + 1);
      commit('SET', { key: 'tabs', value: next });
      if (!next.some((t) => t.key === active)) {
        return Promise.resolve({
          path: next[index]?.fullPath || next[index]?.key,
          home: !next[index],
        });
      }
      return Promise.resolve({});
    },
    tabRemoveOther({ state, commit }, { key }) {
      const tabs = withoutHomeTabs(state.tabs || []);
      if (isHomeTabKey(key)) {
        commit('SET', { key: 'tabs', value: [] });
        return Promise.resolve({ home: true });
      }
      const next = tabs.filter((t) => t.key === key);
      if (!next.length) return Promise.reject();
      commit('SET', { key: 'tabs', value: next });
      return Promise.resolve({
        path: next[0]?.fullPath || next[0]?.key,
        home: false,
      });
    },
    tabRemoveAll({ commit }) {
      commit('SET', { key: 'tabs', value: [] });
      cacheSetting('tabs', []);
      return Promise.resolve({ home: true });
    },
    tabSetItem({ state, commit }, data) {
      if (!data?.key || isHomeTabKey(data.key)) return;
      const tabs = withoutHomeTabs(state.tabs || []);
      const index = tabs.findIndex((t) => t.key === data.key);
      if (index === -1) return;
      const next = tabs.slice();
      next[index] = { ...next[index], ...data };
      commit('SET', { key: 'tabs', value: next });
    },
    setHomeComponents({ commit }, value) {
      commit('SET', { key: 'homeComponents', value: value || [] });
    },
    setRouteReload({ commit }, value) {
      commit('SET', { key: 'routeReload', value });
      return Promise.resolve();
    },
    updateScreenSize({ commit }) {
      commit('SET', { key: 'screenWidth', value: screenWidth() });
      commit('SET', { key: 'screenHeight', value: screenHeight() });
      commit('SET', { key: 'contentWidth', value: contentWidth() });
      commit('SET', { key: 'contentHeight', value: contentHeight() });
    },
    setColor({ commit }, value) {
      commit('SET', { key: 'color', value });
      cacheSetting('color', value);
    },
    setWeakMode({ commit }, value) {
      commit('SET', { key: 'weakMode', value });
      cacheSetting('weakMode', value);
    },
    setStyleResponsive({ commit }, value) {
      commit('SET', { key: 'styleResponsive', value });
      cacheSetting('styleResponsive', value);
    },
    recoverTheme({ commit, state }) {
      // 清理与当前地址无关的脏页签，避免面包屑残留「资质证照/新增」等旧路径
      const cache = getCacheSetting();
      const tabs = withoutHomeTabs(cache.tabs || state.tabs || []);
      commit('SET', { key: 'tabs', value: tabs });
      cacheSetting('tabs', tabs);
    },
  },
};