const { fileData } = require("../utils/files");
const { v4: uuidv4 } = require("uuid");
const { getVectorDbClass } = require("../utils/helpers");
const prisma = require("../utils/prisma");
const { Telemetry } = require("./telemetry");

const Document = {
  forWorkspace: async function (workspaceId = null) {
    if (!workspaceId) return [];
    return await prisma.workspace_documents.findMany({
      where: { workspaceId },
    });
  },

  delete: async function (clause = {}) {
    try {
      await prisma.workspace_documents.deleteMany({ where: clause });
      return true;
    } catch (error) {
      console.error(error.message);
      return false;
    }
  },

  firstWhere: async function (clause = {}) {
    try {
      const document = await prisma.workspace_documents.findFirst({
        where: clause,
      });
      return document || null;
    } catch (error) {
      console.error(error.message);
      return null;
    }
  },

  addDocuments: async function (workspace, additions = []) {
    const VectorDb = getVectorDbClass();
    if (additions.length === 0) return { failed: [], embedded: [] };
    const embedded = [];
    const failedToEmbed = [];
    const errors = new Set();

    for (const path of additions) {
      const data = await fileData(path);
      if (!data) continue;

      const docId = uuidv4();
      const { pageContent, ...metadata } = data;
      const newDoc = {
        docId,
        filename: path.split("/")[1],
        docpath: path,
        workspaceId: workspace.id,
        metadata: JSON.stringify(metadata),
      };

      const { vectorized, error } = await VectorDb.addDocumentToNamespace(
        workspace.slug,
        { ...data, docId },
        path
      );

      if (!vectorized) {
        console.error(
          "Failed to vectorize",
          metadata?.title || newDoc.filename
        );
        failedToEmbed.push(metadata?.title || newDoc.filename);
        errors.add(error);
        continue;
      }

      try {
        await prisma.workspace_documents.create({ data: newDoc });
        embedded.push(path);
      } catch (error) {
        console.error(error.message);
      }
    }

    await Telemetry.sendTelemetry("documents_embedded_in_workspace", {
      LLMSelection: process.env.LLM_PROVIDER || "openai",
      Embedder: process.env.EMBEDDING_ENGINE || "inherit",
      VectorDbSelection: process.env.VECTOR_DB || "pinecone",
    });
    return { failedToEmbed, errors: Array.from(errors), embedded };
  },

  removeDocuments: async function (workspace, removals = []) {
    const VectorDb = getVectorDbClass();
    if (removals.length === 0) return;

    for (const path of removals) {
      const document = await this.firstWhere({
        docpath: path,
        workspaceId: workspace.id,
      });
      if (!document) continue;
      await VectorDb.deleteDocumentFromNamespace(
        workspace.slug,
        document.docId
      );

      try {
        await prisma.workspace_documents.delete({
          where: { id: document.id, workspaceId: workspace.id },
        });
        await prisma.document_vectors.deleteMany({
          where: { docId: document.docId },
        });
      } catch (error) {
        console.error(error.message);
      }
    }

    await Telemetry.sendTelemetry("documents_removed_in_workspace", {
      LLMSelection: process.env.LLM_PROVIDER || "openai",
      Embedder: process.env.EMBEDDING_ENGINE || "inherit",
      VectorDbSelection: process.env.VECTOR_DB || "pinecone",
    });
    return true;
  },

  count: async function (clause = {}, limit = null) {
    try {
      const count = await prisma.workspace_documents.count({
        where: clause,
        ...(limit !== null ? { take: limit } : {}),
      });
      return count;
    } catch (error) {
      console.error("FAILED TO COUNT DOCUMENTS.", error.message);
      return 0;
    }
  },
};

module.exports = { Document };