import { defineStore } from 'pinia';

interface PersonalForm {
  enabled: boolean;
  self_identify: string;
  user_name: string;
  profession: string;
  tone: string;
  considerations: string[];
  thinking_interval: number | null;
  disabled_tool_categories: string[];
}

interface PersonalizationState {
  visible: boolean;
  loading: boolean;
  saving: boolean;
  loaded: boolean;
  status: string;
  error: string;
  maxConsiderations: number;
  toggleUpdating: boolean;
  overlayPressActive: boolean;
  newConsideration: string;
  tonePresets: string[];
  draggedConsiderationIndex: number | null;
  form: PersonalForm;
  toolCategories: Array<{ id: string; label: string }>;
  thinkingIntervalDefault: number;
  thinkingIntervalRange: { min: number; max: number };
}

const DEFAULT_INTERVAL = 10;
const DEFAULT_INTERVAL_RANGE = { min: 1, max: 50 };

const defaultForm = (): PersonalForm => ({
  enabled: false,
  self_identify: '',
  user_name: '',
  profession: '',
  tone: '',
  considerations: [],
  thinking_interval: null,
  disabled_tool_categories: []
});

export const usePersonalizationStore = defineStore('personalization', {
  state: (): PersonalizationState => ({
    visible: false,
    loading: false,
    saving: false,
    loaded: false,
    status: '',
    error: '',
    maxConsiderations: 10,
    toggleUpdating: false,
    overlayPressActive: false,
    newConsideration: '',
    tonePresets: ['健谈', '幽默', '直言不讳', '鼓励性', '诗意', '企业商务', '打破常规', '同理心'],
    draggedConsiderationIndex: null,
    form: defaultForm(),
    toolCategories: [],
    thinkingIntervalDefault: DEFAULT_INTERVAL,
    thinkingIntervalRange: { ...DEFAULT_INTERVAL_RANGE }
  }),
  actions: {
    async openDrawer() {
      this.visible = true;
      if (!this.loaded && !this.loading) {
        await this.fetchPersonalization();
      }
    },
    closeDrawer() {
      this.visible = false;
      this.draggedConsiderationIndex = null;
      this.overlayPressActive = false;
    },
    handleOverlayPressStart(event: Event) {
      if (event && (event as MouseEvent).type === 'mousedown') {
        const mouse = event as MouseEvent;
        if (mouse.button !== 0) {
          return;
        }
      }
      this.overlayPressActive = true;
    },
    handleOverlayPressEnd() {
      if (!this.overlayPressActive) {
        return;
      }
      this.overlayPressActive = false;
      this.closeDrawer();
    },
    handleOverlayPressCancel() {
      this.overlayPressActive = false;
    },
    async fetchPersonalization() {
      this.loading = true;
      this.error = '';
      try {
        const resp = await fetch('/api/personalization');
        const result = await resp.json();
        if (!resp.ok || !result.success) {
          throw new Error(result.error || '加载失败');
        }
        this.applyPersonalizationData(result.data || {});
        this.applyPersonalizationMeta(result);
        this.loaded = true;
      } catch (error: any) {
        this.error = error?.message || '加载失败';
      } finally {
        this.loading = false;
      }
    },
    applyPersonalizationData(data: any) {
      this.form = {
        enabled: !!data.enabled,
        self_identify: data.self_identify || '',
        user_name: data.user_name || '',
        profession: data.profession || '',
        tone: data.tone || '',
        considerations: Array.isArray(data.considerations) ? [...data.considerations] : [],
        thinking_interval: typeof data.thinking_interval === 'number' ? data.thinking_interval : null,
        disabled_tool_categories: Array.isArray(data.disabled_tool_categories) ? data.disabled_tool_categories.filter((item: unknown) => typeof item === 'string') : []
      };
      this.clearFeedback();
    },
    applyPersonalizationMeta(payload: any) {
      if (payload && typeof payload.thinking_interval_default === 'number') {
        this.thinkingIntervalDefault = payload.thinking_interval_default;
      } else {
        this.thinkingIntervalDefault = DEFAULT_INTERVAL;
      }
      if (payload && payload.thinking_interval_range) {
        const { min, max } = payload.thinking_interval_range;
        this.thinkingIntervalRange = {
          min: typeof min === 'number' ? min : DEFAULT_INTERVAL_RANGE.min,
          max: typeof max === 'number' ? max : DEFAULT_INTERVAL_RANGE.max
        };
      } else {
        this.thinkingIntervalRange = { ...DEFAULT_INTERVAL_RANGE };
      }
      if (payload && Array.isArray(payload.tool_categories)) {
        this.toolCategories = payload.tool_categories
          .map((item: { id?: string; label?: string } = {}) => ({
            id: typeof item.id === 'string' ? item.id : String(item.id ?? ''),
            label: (item.label && String(item.label)) || (typeof item.id === 'string' ? item.id : String(item.id ?? ''))
          }))
          .filter((item: { id: string }) => !!item.id);
      } else {
        this.toolCategories = [];
      }
    },
    clearFeedback() {
      this.status = '';
      this.error = '';
    },
    async toggleEnabled() {
      if (this.toggleUpdating) {
        return;
      }
      const newValue = !this.form.enabled;
      const previousValue = this.form.enabled;
      this.toggleUpdating = true;
      this.status = '';
      this.error = '';
      this.form.enabled = newValue;
      try {
        const resp = await fetch('/api/personalization', {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify({ enabled: newValue })
        });
        const result = await resp.json();
        if (!resp.ok || !result.success) {
          throw new Error(result.error || '更新失败');
        }
        if (result.data) {
          this.applyPersonalizationData(result.data);
        }
        this.applyPersonalizationMeta(result);
        const statusLabel = newValue ? '已启用' : '已停用';
        this.status = statusLabel;
        setTimeout(() => {
          if (this.status === statusLabel) {
            this.status = '';
          }
        }, 2000);
      } catch (error: any) {
        this.form.enabled = previousValue;
        this.error = error?.message || '更新失败';
      } finally {
        this.toggleUpdating = false;
      }
    },
    async save() {
      if (this.saving) {
        return;
      }
      this.saving = true;
      this.status = '';
      this.error = '';
      try {
        const resp = await fetch('/api/personalization', {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify(this.form)
        });
        const result = await resp.json();
        if (!resp.ok || !result.success) {
          throw new Error(result.error || '保存失败');
        }
        this.applyPersonalizationData(result.data || {});
        this.applyPersonalizationMeta(result);
        this.status = '已保存';
        setTimeout(() => {
          if (this.status === '已保存') {
            this.status = '';
          }
        }, 3000);
      } catch (error: any) {
        this.error = error?.message || '保存失败';
      } finally {
        this.saving = false;
      }
    },
    updateField(payload: { key: keyof PersonalForm; value: string }) {
      if (!payload || !payload.key) {
        return;
      }
      this.form = {
        ...this.form,
        [payload.key]: payload.value
      };
      this.clearFeedback();
    },
    setThinkingInterval(value: number | null) {
      let target: number | null = value;
      if (typeof target === 'number') {
        if (Number.isNaN(target)) {
          target = null;
        } else {
          const rounded = Math.round(target);
          const min = this.thinkingIntervalRange.min ?? DEFAULT_INTERVAL_RANGE.min;
          const max = this.thinkingIntervalRange.max ?? DEFAULT_INTERVAL_RANGE.max;
          target = Math.max(min, Math.min(max, rounded));
          if (target === this.thinkingIntervalDefault) {
            target = null;
          }
        }
      }
      this.form = {
        ...this.form,
        thinking_interval: target
      };
      this.clearFeedback();
    },
    toggleDefaultToolCategory(categoryId: string) {
      if (!categoryId) {
        return;
      }
      const current = new Set(this.form.disabled_tool_categories || []);
      if (current.has(categoryId)) {
        current.delete(categoryId);
      } else {
        current.add(categoryId);
      }
      this.form = {
        ...this.form,
        disabled_tool_categories: Array.from(current)
      };
      this.clearFeedback();
    },
    applyTonePreset(preset: string) {
      if (!preset) {
        return;
      }
      this.form = {
        ...this.form,
        tone: preset
      };
      this.clearFeedback();
    },
    updateNewConsideration(value: string) {
      this.newConsideration = value;
      this.clearFeedback();
    },
    addConsideration() {
      if (!this.newConsideration) {
        return;
      }
      if (this.form.considerations.length >= this.maxConsiderations) {
        return;
      }
      this.form = {
        ...this.form,
        considerations: [...this.form.considerations, this.newConsideration]
      };
      this.newConsideration = '';
      this.clearFeedback();
    },
    removeConsideration(index: number) {
      const items = [...this.form.considerations];
      items.splice(index, 1);
      this.form = {
        ...this.form,
        considerations: items
      };
      this.clearFeedback();
    },
    considerationDragStart(index: number, event: DragEvent) {
      this.draggedConsiderationIndex = index;
      if (event && event.dataTransfer) {
        event.dataTransfer.effectAllowed = 'move';
      }
    },
    considerationDragOver(index: number, event: DragEvent) {
      if (event) {
        event.preventDefault();
      }
      if (this.draggedConsiderationIndex === null || this.draggedConsiderationIndex === index) {
        return;
      }
      const items = [...this.form.considerations];
      const [moved] = items.splice(this.draggedConsiderationIndex, 1);
      items.splice(index, 0, moved);
      this.form = {
        ...this.form,
        considerations: items
      };
      this.draggedConsiderationIndex = index;
      this.clearFeedback();
    },
    considerationDrop(index: number, event: DragEvent) {
      if (event) {
        event.preventDefault();
      }
      this.considerationDragEnd();
      this.considerationDragOver(index, event);
    },
    considerationDragEnd() {
      this.draggedConsiderationIndex = null;
    },
    async logout() {
      try {
        const resp = await fetch('/logout', { method: 'POST' });
        let result: any = {};
        try {
          result = await resp.json();
        } catch (err) {
          result = {};
        }
        if (!resp.ok || (result && result.success === false)) {
          const message = (result && (result.error || result.message)) || '退出失败';
          throw new Error(message);
        }
        window.location.href = '/login';
      } catch (error: any) {
        console.error('退出登录失败:', error);
        this.error = error?.message || '退出登录失败，请稍后重试';
      }
    }
  }
});