import { defineStore } from "pinia";
import { ref, computed } from "vue";
import DocumentAttachmentService from "@/services/documentAttachment";
import type {
  DocumentAttachment,
  CreateAttachmentPayload,
  UpdateAttachmentPayload,
  BulkDeletePayload,
  ReorderAttachmentPayload,
} from "@/services/documentAttachment";

export const useDocumentAttachmentStore = defineStore(
  "documentAttachment",
  () => {
    // State
    const attachments = ref<DocumentAttachment[]>([]);
    const loading = ref(false);
    const error = ref<string | null>(null);
    const success = ref(false);

    // Getters
    const allAttachments = computed(() => attachments.value);
    const isLoading = computed(() => loading.value);
    const hasError = computed(() => error.value !== null);
    const getError = computed(() => error.value);
    const isSuccess = computed(() => success.value);

    const getAttachmentsByType = computed(() => (type: string) =>
      attachments.value?.filter(
        (attachment) => attachment.attachable_type === type
      ) || []
    );

    const getAttachmentsById = computed(() => (id: number) =>
      attachments.value?.filter(
        (attachment) => attachment.attachable_id === id
      ) || []
    );

    const getInterventionAttachments = computed(
      () => (interventionId: number) =>
        attachments.value?.filter(
          (attachment) =>
            attachment.attachable_type === "App\\Models\\Intervention" &&
            attachment.attachable_id === interventionId
        ) || []
    );

    const getClientAttachments = computed(() => (clientId: number) =>
      attachments.value?.filter(
        (attachment) =>
          attachment.attachable_type === "App\\Models\\Client" &&
          attachment.attachable_id === clientId
      ) || []
    );

    const getDeceasedAttachments = computed(() => (deceasedId: number) =>
      attachments.value?.filter(
        (attachment) =>
          attachment.attachable_type === "App\\Models\\Deceased" &&
          attachment.attachable_id === deceasedId
      ) || []
    );

    // Actions
    const setLoading = (isLoading: boolean) => {
      loading.value = isLoading;
    };

    const setError = (err: string | null) => {
      error.value = err;
    };

    const clearError = () => {
      error.value = null;
    };

    const setSuccess = (isSuccess: boolean) => {
      success.value = isSuccess;
    };

    const clearSuccess = () => {
      success.value = false;
    };

    const setAttachments = (newAttachments: DocumentAttachment[]) => {
      attachments.value = newAttachments || [];
    };

    const addAttachment = (attachment: DocumentAttachment) => {
      if (!attachments.value) {
        attachments.value = [];
      }
      attachments.value.push(attachment);
    };

    const updateAttachment = (updatedAttachment: DocumentAttachment) => {
      if (!attachments.value) return;

      const index = attachments.value.findIndex(
        (attachment) => attachment.id === updatedAttachment.id
      );
      if (index !== -1) {
        attachments.value[index] = updatedAttachment;
      }
    };

    const removeAttachment = (attachmentId: number) => {
      if (!attachments.value) return;

      attachments.value = attachments.value.filter(
        (attachment) => attachment.id !== attachmentId
      );
    };

    const removeAttachments = (attachmentIds: number[]) => {
      if (!attachments.value) return;

      attachments.value = attachments.value.filter(
        (attachment) => !attachmentIds.includes(attachment.id)
      );
    };

    /**
     * Attach a file to a model
     */
    const attachFile = async (payload: CreateAttachmentPayload) => {
      setLoading(true);
      setError(null);
      setSuccess(false);

      try {
        const response = await DocumentAttachmentService.attachFile(payload);
        addAttachment(response.data);
        setSuccess(true);
        return response.data;
      } catch (err: any) {
        const errorMessage =
          err.response?.data?.message ||
          err.message ||
          "Échec de l'attachement du fichier";
        setError(errorMessage);
        throw err;
      } finally {
        setLoading(false);
      }
    };

    /**
     * Detach a file from a model
     */
    const detachFile = async (attachmentId: number) => {
      setLoading(true);
      setError(null);
      setSuccess(false);

      try {
        await DocumentAttachmentService.detachFile(attachmentId);
        removeAttachment(attachmentId);
        setSuccess(true);
        return { message: "Fichier détaché avec succès" };
      } catch (err: any) {
        const errorMessage =
          err.response?.data?.message ||
          err.message ||
          "Échec du détachement du fichier";
        setError(errorMessage);
        throw err;
      } finally {
        setLoading(false);
      }
    };

    /**
     * Update file attachment metadata
     */
    const updateAttachmentMetadata = async (
      attachmentId: number,
      payload: UpdateAttachmentPayload
    ) => {
      setLoading(true);
      setError(null);
      setSuccess(false);

      try {
        const response = await DocumentAttachmentService.updateAttachment(
          attachmentId,
          payload
        );
        updateAttachment(response.data);
        setSuccess(true);
        return response.data;
      } catch (err: any) {
        const errorMessage =
          err.response?.data?.message ||
          err.message ||
          "Échec de la mise à jour du document";
        setError(errorMessage);
        throw err;
      } finally {
        setLoading(false);
      }
    };

    /**
     * Get files attached to a specific model
     */
    const fetchAttachedFiles = async (
      attachableType: string,
      attachableId: number
    ) => {
      setLoading(true);
      setError(null);
      setSuccess(false);

      try {
        const response = await DocumentAttachmentService.getAttachedFiles(
          attachableType,
          attachableId
        );
        setAttachments(response.data);
        return response.data;
      } catch (err: any) {
        const errorMessage =
          err.response?.data?.message ||
          err.message ||
          "Échec du chargement des fichiers attachés";
        setError(errorMessage);
        throw err;
      } finally {
        setLoading(false);
      }
    };

    /**
     * Get files attached to an intervention
     */
    const fetchInterventionFiles = async (interventionId: number) => {
      setLoading(true);
      setError(null);
      setSuccess(false);

      try {
        const response = await DocumentAttachmentService.getInterventionFiles(
          interventionId
        );
        setAttachments(response.data);
        return response.data;
      } catch (err: any) {
        const errorMessage =
          err.response?.data?.message ||
          err.message ||
          "Échec du chargement des fichiers de l'intervention";
        setError(errorMessage);
        throw err;
      } finally {
        setLoading(false);
      }
    };

    /**
     * Get files attached to a client
     */
    const fetchClientFiles = async (clientId: number) => {
      setLoading(true);
      setError(null);
      setSuccess(false);

      try {
        const response = await DocumentAttachmentService.getClientFiles(
          clientId
        );
        setAttachments(response.data);
        return response.data;
      } catch (err: any) {
        const errorMessage =
          err.response?.data?.message ||
          err.message ||
          "Échec du chargement des fichiers du client";
        setError(errorMessage);
        throw err;
      } finally {
        setLoading(false);
      }
    };

    /**
     * Get files attached to a deceased
     */
    const fetchDeceasedFiles = async (deceasedId: number) => {
      setLoading(true);
      setError(null);
      setSuccess(false);

      try {
        const response = await DocumentAttachmentService.getDeceasedFiles(
          deceasedId
        );
        setAttachments(response.data);
        return response.data;
      } catch (err: any) {
        const errorMessage =
          err.response?.data?.message ||
          err.message ||
          "Échec du chargement des fichiers du défunt";
        setError(errorMessage);
        throw err;
      } finally {
        setLoading(false);
      }
    };

    /**
     * Detach multiple files at once
     */
    const detachMultipleFiles = async (payload: BulkDeletePayload) => {
      setLoading(true);
      setError(null);
      setSuccess(false);

      try {
        const response = await DocumentAttachmentService.detachMultiple(
          payload
        );
        removeAttachments(payload.attachment_ids);
        setSuccess(true);
        return response;
      } catch (err: any) {
        const errorMessage =
          err.response?.data?.message ||
          err.message ||
          "Échec de la suppression des fichiers";
        setError(errorMessage);
        throw err;
      } finally {
        setLoading(false);
      }
    };

    /**
     * Reorder file attachments
     */
    const reorderAttachments = async (payload: ReorderAttachmentPayload) => {
      setLoading(true);
      setError(null);
      setSuccess(false);

      try {
        const response = await DocumentAttachmentService.reorderAttachments(
          payload
        );

        // Update sort order in local state
        if (attachments.value) {
          payload.attachments.forEach((item) => {
            const attachment = attachments.value.find((a) => a.id === item.id);
            if (attachment) {
              attachment.sort_order = item.sort_order;
            }
          });

          // Sort attachments by sort_order
          attachments.value.sort((a, b) => a.sort_order - b.sort_order);
        }

        setSuccess(true);
        return response;
      } catch (err: any) {
        const errorMessage =
          err.response?.data?.message ||
          err.message ||
          "Échec de la réorganisation des fichiers";
        setError(errorMessage);
        throw err;
      } finally {
        setLoading(false);
      }
    };

    /**
     * Upload and attach files to a model
     */
    const uploadAndAttachFiles = async (
      files: File[],
      attachableType: string,
      attachableId: number,
      options?: {
        labels?: string[];
        onProgress?: (progress: number) => void;
      }
    ) => {
      setLoading(true);
      setError(null);
      setSuccess(false);

      try {
        const uploadedAttachments = await DocumentAttachmentService.uploadAndAttachFiles(
          files,
          attachableType,
          attachableId,
          options
        );

        // Add all uploaded attachments to the store
        uploadedAttachments.forEach((attachment) => {
          addAttachment(attachment);
        });

        setSuccess(true);
        return uploadedAttachments;
      } catch (err: any) {
        const errorMessage =
          err.response?.data?.message ||
          err.message ||
          "Échec du téléchargement des fichiers";
        setError(errorMessage);
        throw err;
      } finally {
        setLoading(false);
      }
    };

    /**
     * Validate file before upload
     */
    const validateFile = (
      file: File,
      maxSize: number = 10 * 1024 * 1024
    ): { valid: boolean; error?: string } => {
      return DocumentAttachmentService.validateFile(file, maxSize);
    };

    /**
     * Format file size for display
     */
    const formatFileSize = (bytes: number | null): string => {
      return DocumentAttachmentService.formatFileSize(bytes);
    };

    /**
     * Get file icon based on MIME type
     */
    const getFileIcon = (mimeType: string | null): string => {
      return DocumentAttachmentService.getFileIcon(mimeType);
    };

    /**
     * Reset the state
     */
    const resetState = () => {
      attachments.value = [];
      loading.value = false;
      error.value = null;
      success.value = false;
    };

    return {
      // State
      attachments,
      loading,
      error,
      success,

      // Getters
      allAttachments,
      isLoading,
      hasError,
      getError,
      isSuccess,
      getAttachmentsByType,
      getAttachmentsById,
      getInterventionAttachments,
      getClientAttachments,
      getDeceasedAttachments,

      // Actions
      setLoading,
      setError,
      clearError,
      setSuccess,
      clearSuccess,
      setAttachments,
      addAttachment,
      updateAttachment,
      removeAttachment,
      removeAttachments,
      attachFile,
      detachFile,
      updateAttachmentMetadata,
      fetchAttachedFiles,
      fetchInterventionFiles,
      fetchClientFiles,
      fetchDeceasedFiles,
      detachMultipleFiles,
      reorderAttachments,
      uploadAndAttachFiles,
      validateFile,
      formatFileSize,
      getFileIcon,
      resetState,
    };
  }
);

export default useDocumentAttachmentStore;