const SESSION_KEY_NAME = "ignis_session_key";

function summaryInt(summary, key) {
  const value = summary?.[key];
  if (typeof value === "number") {
    return value;
  }
  const parsed = Number.parseInt(String(value ?? ""), 10);
  return Number.isFinite(parsed) ? parsed : 0;
}

function formatRescanSummary(summary) {
  const found = summaryInt(summary, "found");
  const added = summaryInt(summary, "added");
  const updated = summaryInt(summary, "updated");
  const removed = summaryInt(summary, "removed_offline");

  if (added === 0 && updated === 0 && removed === 0 && found === 0) {
    return "Сканирование завершено: устройства не найдены";
  }

  if (added === 0 && removed === 0) {
    return `Сканирование завершено: найдено ${found}, обновлено ${updated}`;
  }

  return `Сканирование завершено: найдено ${found}, новых ${added}, обновлено ${updated}, убрано ${removed}`;
}

const { createApp } = Vue;

createApp({
  data() {
    const sessionApiKey = sessionStorage.getItem(SESSION_KEY_NAME) || "";
    return {
      apiKey: sessionApiKey,
      tempKey: "",
      rememberInSession: sessionApiKey.length > 0,
      tab: "control",
      isAdmin: false,
      isMaster: false,
      authName: "",
      serverInfo: null,
      groups: {},
      devices: [],
      sliders: {},
      newGroup: { id: "", name: "", macs: [] },
      isLoading: false,
      isLoadingStatus: false,
      isFetching: false,
      isRescanning: false,
      taskHour: "22",
      taskMin: "00",
      newTask: { target_id: "", state: true },
      tasks: [],
      allScenes: {},
      toasts: [],
      toastCounter: 0,
      apiKeys: [],
      newKeyName: "",
      newKeyAdmin: false,
      lastCreatedKey: "",
      statsData: [],
      eventLog: [],
      statsDays: 7,
      refreshTimerId: null,
    };
  },
  methods: {
    saveKey() {
      const key = this.tempKey.trim();
      if (!key) {
        return;
      }

      this.apiKey = key;
      this.tempKey = "";
      if (this.rememberInSession) {
        sessionStorage.setItem(SESSION_KEY_NAME, key);
      } else {
        sessionStorage.removeItem(SESSION_KEY_NAME);
      }
      this.initApp();
    },
    resetAuthState() {
      this.apiKey = "";
      this.tempKey = "";
      this.isAdmin = false;
      this.isMaster = false;
      this.authName = "";
      this.serverInfo = null;
      this.groups = {};
      this.devices = [];
      this.sliders = {};
      this.tasks = [];
      this.apiKeys = [];
      this.statsData = [];
      this.eventLog = [];
      this.lastCreatedKey = "";
      if (this.refreshTimerId !== null) {
        clearInterval(this.refreshTimerId);
        this.refreshTimerId = null;
      }
      sessionStorage.removeItem(SESSION_KEY_NAME);
    },
    logout() {
      this.resetAuthState();
      location.reload();
    },
    toast(text, type = "info", duration = 3000) {
      const id = ++this.toastCounter;
      this.toasts.push({ id, text, type });
      setTimeout(() => {
        this.toasts = this.toasts.filter((toast) => toast.id !== id);
      }, duration);
    },
    getGroupName(targetId) {
      const group = this.groups[targetId];
      return group ? group.name : null;
    },
    serverDisplayName() {
      if (this.serverInfo?.instance_name) {
        return this.serverInfo.instance_name;
      }
      return this.serverInfo?.app_name || "Ignis Core";
    },
    serverDisplaySubtitle() {
      if (this.serverInfo?.instance_name) {
        return this.serverInfo.app_name || "Ignis Core";
      }
      if (this.serverInfo?.diagnostics_visible) {
        return "Подключение активно и готово к управлению.";
      }
      return "Подключение активно. Операционная диагностика скрыта для гостевого доступа.";
    },
    shortSha(value) {
      if (!value) {
        return null;
      }
      return value.length <= 7 ? value : value.slice(0, 7);
    },
    formatServerTimestamp(iso) {
      if (!iso) {
        return "unknown";
      }

      const parsed = new Date(iso);
      if (Number.isNaN(parsed.getTime())) {
        return iso;
      }

      const pad = (value) => String(value).padStart(2, "0");
      return `${parsed.getUTCFullYear()}-${pad(parsed.getUTCMonth() + 1)}-${pad(parsed.getUTCDate())} ${pad(parsed.getUTCHours())}:${pad(parsed.getUTCMinutes())} UTC`;
    },
    formatServerBuild(build) {
      if (!build) {
        return "build info unavailable";
      }

      const parts = [`v${build.version}`];
      const shortSha = this.shortSha(build.git_sha);
      if (shortSha) {
        parts.push(shortSha);
      }
      if (build.build_date) {
        parts.push(this.formatServerTimestamp(build.build_date));
      }
      return parts.join(" · ");
    },
    formatDuration(totalSeconds, maxParts = 2) {
      const seconds = Math.max(Number(totalSeconds || 0), 0);
      if (seconds < 60) {
        return "меньше минуты";
      }

      const units = [
        { size: 86400, forms: ["день", "дня", "дней"] },
        { size: 3600, forms: ["час", "часа", "часов"] },
        { size: 60, forms: ["минута", "минуты", "минут"] },
      ];
      let remaining = seconds;
      const parts = [];

      units.forEach((unit) => {
        if (parts.length >= maxParts) {
          return;
        }
        const value = Math.floor(remaining / unit.size);
        if (value <= 0) {
          return;
        }
        parts.push(`${value} ${this.pluralRu(value, ...unit.forms)}`);
        remaining -= value * unit.size;
      });

      return parts.join(" ");
    },
    formatUptime(totalSeconds) {
      return this.formatDuration(totalSeconds, 2);
    },
    formatRelativeUptime(totalSeconds) {
      const seconds = Math.max(Number(totalSeconds || 0), 0);
      if (seconds < 60) {
        return "только что";
      }
      return `${this.formatDuration(seconds, 2)} назад`;
    },
    pluralRu(count, one, few, many) {
      const mod10 = count % 10;
      const mod100 = count % 100;
      if (mod10 === 1 && mod100 !== 11) {
        return one;
      }
      if (mod10 >= 2 && mod10 <= 4 && (mod100 < 12 || mod100 > 14)) {
        return few;
      }
      return many;
    },
    async request(path, { method = "GET", query = null, body = null } = {}) {
      let url = path;
      if (query) {
        url += `?${new URLSearchParams(query).toString()}`;
      }

      try {
        const response = await fetch(url, {
          method,
          cache: "no-store",
          credentials: "same-origin",
          referrerPolicy: "no-referrer",
          headers: {
            "X-API-Key": this.apiKey,
            "Content-Type": "application/json",
          },
          body: body ? JSON.stringify(body) : null,
        });

        if (response.status === 403) {
          const err = await response.json().catch(() => ({}));
          if (
            err.detail === "Недостаточно прав" ||
            err.detail === "Требуется мастер-ключ"
          ) {
            this.toast("Нет прав", "error");
            return null;
          }
          this.toast("Неверный API-ключ", "error");
          this.logout();
          return null;
        }

        if (!response.ok) {
          const err = await response.json().catch(() => ({}));
          this.toast(err.detail || `Ошибка ${response.status}`, "error");
          return null;
        }

        return await response.json();
      } catch (_) {
        this.toast("Сервер недоступен", "error");
        return null;
      }
    },
    async initApp() {
      this.isLoading = true;
      const auth = await this.request("/auth/me");
      if (!auth) {
        this.isLoading = false;
        return;
      }

      this.isAdmin = auth.is_admin;
      this.isMaster = Boolean(auth.is_master);
      this.authName = auth.name;
      await this.fetchData();
      this.isLoading = false;

      if (this.refreshTimerId === null) {
        this.refreshTimerId = setInterval(() => this.fetchData(), 15000);
      }
    },
    async fetchData() {
      if (!this.apiKey || this.isFetching) {
        return;
      }

      this.isFetching = true;
      try {
        const [serverInfoData, groupsData, devicesData, scenesData] = await Promise.all([
          this.request("/system/info"),
          this.request("/devices/groups"),
          this.request("/devices"),
          this.request("/devices/scenes"),
        ]);

        if (serverInfoData) {
          this.serverInfo = serverInfoData;
        }

        if (groupsData) {
          this.groups = groupsData;
          Object.keys(this.groups).forEach((id) => {
            if (!this.sliders[id]) {
              this.sliders[id] = { brightness: 100, temp: 4000, state: false };
            }
          });
          await this.syncGroupStatuses();
        }

        if (devicesData) {
          this.devices = Array.isArray(devicesData)
            ? devicesData
            : Object.values(devicesData);
        }

        if (scenesData) {
          this.allScenes = scenesData;
        }

        if (this.isAdmin) {
          await this.fetchTasks();
        }
        if (this.isMaster) {
          await this.fetchApiKeys();
        }
      } finally {
        this.isFetching = false;
      }
    },
    async control(id, params) {
      await this.request(`/control/group/${id}`, { method: "POST", body: params });
    },
    toggleGroup(id, state) {
      if (this.sliders[id]) {
        this.sliders[id].state = state;
      }
      this.control(id, { state });
    },
    setBrightness(id, value) {
      if (this.sliders[id]) {
        this.sliders[id].brightness = value;
      }
      this.control(id, { brightness: value });
    },
    setTemp(id, value) {
      if (this.sliders[id]) {
        this.sliders[id].temp = value;
      }
      this.control(id, { temp: value });
    },
    setScene(id, scene) {
      this.control(id, { scene });
    },
    setColor(id, hex) {
      this.control(id, {
        r: Number.parseInt(hex.slice(1, 3), 16),
        g: Number.parseInt(hex.slice(3, 5), 16),
        b: Number.parseInt(hex.slice(5, 7), 16),
      });
    },
    async createGroup() {
      const response = await this.request("/devices/groups", {
        method: "POST",
        body: {
          id: this.newGroup.id,
          name: this.newGroup.name,
          macs: this.newGroup.macs,
        },
      });
      if (!response) {
        return;
      }

      this.toast(`Группа "${this.newGroup.name}" создана`, "success");
      this.newGroup = { id: "", name: "", macs: [] };
      await this.fetchData();
      this.tab = "control";
    },
    async deleteGroup(id) {
      const name = this.groups[id]?.name || id;
      if (!confirm(`Удалить группу "${name}"?`)) {
        return;
      }

      const response = await this.request(`/devices/groups/${id}`, {
        method: "DELETE",
      });
      if (!response) {
        return;
      }

      this.toast("Удалена", "success");
      await this.fetchData();
    },
    async rescan() {
      this.isRescanning = true;
      try {
        const response = await this.request("/devices/rescan", { method: "POST" });
        if (!response) {
          return;
        }

        await this.fetchData();
        this.toast(formatRescanSummary(response), "success");
      } finally {
        this.isRescanning = false;
      }
    },
    async blink(id) {
      await this.request(`/control/device/${id}/blink`, { method: "POST" });
    },
    async syncGroupStatuses() {
      if (this.isLoadingStatus) {
        return;
      }

      this.isLoadingStatus = true;
      try {
        const ids = Object.keys(this.groups);
        const results = await Promise.all(
          ids.map((id) => this.request(`/control/group/${id}/status`)),
        );
        ids.forEach((id, index) => {
          const data = results[index];
          if (!data?.results?.length) {
            return;
          }

          const validResult = data.results.find((result) => result.status && !result.error);
          if (validResult) {
            this.sliders[id] = {
              brightness: validResult.status.dimming || 100,
              temp: validResult.status.temp || 4000,
              state: validResult.status.state || false,
            };
          }
        });
      } finally {
        this.isLoadingStatus = false;
      }
    },
    async fetchTasks() {
      const data = await this.request("/schedules/tasks");
      if (data) {
        this.tasks = data.tasks || [];
      }
    },
    async addSchedule() {
      if (!this.newTask.target_id) {
        this.toast("Выберите группу", "error");
        return;
      }

      const response = await this.request("/schedules/cron", {
        method: "POST",
        body: {
          target_id: this.newTask.target_id,
          hour: this.taskHour,
          minute: this.taskMin,
          is_group: true,
          state: this.newTask.state,
        },
      });
      if (response) {
        this.toast(`${this.taskHour}:${this.taskMin} добавлено`, "success");
        await this.fetchTasks();
      }
    },
    async deleteTask(id) {
      const response = await this.request(`/schedules/${id}`, {
        method: "DELETE",
      });
      if (response) {
        this.toast("Отменено", "success");
        await this.fetchTasks();
      }
    },
    async setTimer4h(id) {
      this.toggleGroup(id, true);
      const response = await this.request("/schedules/once", {
        method: "POST",
        body: {
          target_id: id,
          hours_from_now: 4,
          is_group: true,
          state: false,
        },
      });
      if (response) {
        this.toast("Таймер 4ч", "success");
        await this.fetchTasks();
      }
    },
    async fetchApiKeys() {
      const data = await this.request("/api-keys");
      if (data) {
        this.apiKeys = data;
      }
    },
    async createApiKey() {
      const name = this.newKeyName.trim();
      if (!name) {
        return;
      }

      const response = await this.request("/api-keys", {
        method: "POST",
        query: { name, is_admin: this.newKeyAdmin },
      });
      if (!response) {
        return;
      }

      this.lastCreatedKey = response.key;
      this.newKeyName = "";
      this.newKeyAdmin = false;
      this.toast(`Ключ "${name}" создан`, "success");
      await this.fetchApiKeys();
    },
    async revokeApiKey(key, name) {
      if (!confirm(`Отозвать ключ "${name}"?`)) {
        return;
      }

      const response = await this.request("/api-keys/revoke", {
        method: "POST",
        body: { key },
      });
      if (response) {
        this.toast(`Ключ "${name}" отозван`, "success");
        await this.fetchApiKeys();
      }
    },
    async activateApiKey(key, name) {
      const response = await this.request("/api-keys/activate", {
        method: "POST",
        body: { key },
      });
      if (response) {
        this.toast(`Ключ "${name}" активирован`, "success");
        await this.fetchApiKeys();
      }
    },
    async copyKey(key) {
      try {
        await navigator.clipboard.writeText(key);
        this.toast("Скопировано", "success");
      } catch (_) {
        this.toast("Не удалось скопировать ключ", "error");
      }
    },
    async fetchStats() {
      const data = await this.request("/stats/summary", {
        query: { days: this.statsDays },
      });
      if (data) {
        this.statsData = data.groups || [];
      }
      await this.fetchEventLog();
    },
    async fetchEventLog() {
      const data = await this.request("/stats/log", {
        query: { limit: 100 },
      });
      if (data) {
        this.eventLog = data;
      }
    },
    formatTime(iso) {
      if (!iso) {
        return "";
      }

      const date = new Date(iso);
      const pad = (value) => String(value).padStart(2, "0");
      return `${pad(date.getDate())}.${pad(date.getMonth() + 1)} ${pad(date.getHours())}:${pad(date.getMinutes())}:${pad(date.getSeconds())}`;
    },
  },
  async mounted() {
    if (this.apiKey) {
      await this.initApp();
    }
  },
  beforeUnmount() {
    if (this.refreshTimerId !== null) {
      clearInterval(this.refreshTimerId);
    }
  },
}).mount("#app");