import { PutObjectCommand, type S3Client } from "@aws-sdk/client-s3";
import type { SupabaseClient, User } from "@supabase/supabase-js";
import { type Context, Hono, type Next } from "hono";
import { getTabloFileNames, isTabloAdmin, isTabloMember } from "./helpers.js";
import {
  authMiddleware,
  r2Middleware,
  streamChatMiddleware,
} from "./middleware.js";

export const tabloDataRouter = new Hono<{
  Variables: {
    user: User;
    supabase: SupabaseClient;
    s3_client: S3Client;
  };
}>();

tabloDataRouter.use(authMiddleware);
tabloDataRouter.use(streamChatMiddleware);
tabloDataRouter.use(r2Middleware);

const checkTabloMember = async (c: Context, next: Next) => {
  const supabase = c.get("supabase");
  const user = c.get("user");
  const tabloId = c.req.param("tabloId");
  const isMember = await isTabloMember(supabase, tabloId, user.id);
  if (!isMember) {
    return c.json({ error: "You are not a member of this tablo" }, 403);
  }
  await next();
};

const checkTabloAdmin = async (c: Context, next: Next) => {
  const supabase = c.get("supabase");
  const user = c.get("user");
  const tabloId = c.req.param("tabloId");
  const isAdmin = await isTabloAdmin(supabase, tabloId, user.id);
  if (!isAdmin) {
    return c.json({ error: "You are not an admin of this tablo" }, 403);
  }
  await next();
};

// GET /tablo-data/:tabloId/filenames - Get all files for a tablo
tabloDataRouter.get("/:tabloId/filenames", checkTabloMember, async (c) => {
  const tabloId = c.req.param("tabloId");
  const s3_client = c.get("s3_client");

  try {
    const fileNames = await getTabloFileNames(s3_client, tabloId);
    return c.json({ fileNames: fileNames || [] });
  } catch (error) {
    console.error("Error fetching tablo files:", error);
    return c.json({ error: "Failed to fetch tablo files" }, 500);
  }
});

// GET /tablo-data/:tabloId/:fileName - Get a specific file
tabloDataRouter.get("/:tabloId/:fileName", checkTabloMember, async (c) => {
  const tabloId = c.req.param("tabloId");
  const fileName = c.req.param("fileName");

  const s3_client = c.get("s3_client");

  try {
    const { GetObjectCommand } = await import("@aws-sdk/client-s3");

    const response = await s3_client.send(
      new GetObjectCommand({
        Bucket: "tablo-data",
        Key: `${tabloId}/${fileName}`,
      })
    );

    if (!response.Body) {
      return c.json({ error: "File not found" }, 404);
    }

    const content = await response.Body.transformToString();

    return c.json({
      fileName,
      content,
      contentType: response.ContentType,
      lastModified: response.LastModified,
    });
  } catch (error) {
    console.error("Error fetching file:", error);
    return c.json({ error: "Failed to fetch file" }, 500);
  }
});

// POST /tablo-data/:tabloId/:fileName - Create or update a file
tabloDataRouter.post("/:tabloId/:fileName", checkTabloAdmin, async (c) => {
  const tabloId = c.req.param("tabloId");
  const fileName = c.req.param("fileName");

  const s3_client = c.get("s3_client");

  try {
    const body = await c.req.json();
    const { content, contentType = "text/plain" } = body;

    if (!content) {
      return c.json({ error: "Content is required" }, 400);
    }

    await s3_client.send(
      new PutObjectCommand({
        Bucket: "tablo-data",
        Key: `${tabloId}/${fileName}`,
        Body: content,
        ContentType: contentType,
      })
    );

    return c.json({
      message: "File uploaded successfully",
      fileName,
      tabloId,
    });
  } catch (error) {
    console.error("Error uploading file:", error);
    return c.json({ error: "Failed to upload file" }, 500);
  }
});

// // PUT /tablo-data/:tabloId/:fileName - Update a file
// tabloDataRouter.put("/:tabloId/:fileName", async (c) => {
//   const tabloId = c.req.param("tabloId");
//   const fileName = c.req.param("fileName");
//   const s3_client = c.get("s3_client");

//   try {
//     const body = await c.req.json();
//     const { content, contentType = "text/plain" } = body;

//     if (!content) {
//       return c.json({ error: "Content is required" }, 400);
//     }

//     const { PutObjectCommand } = await import("@aws-sdk/client-s3");

//     await s3_client.send(
//       new PutObjectCommand({
//         Bucket: "tablo-data",
//         Key: `${tabloId}/${fileName}`,
//         Body: content,
//         ContentType: contentType,
//       })
//     );

//     return c.json({
//       message: "File updated successfully",
//       fileName,
//       tabloId,
//     });
//   } catch (error) {
//     console.error("Error updating file:", error);
//     return c.json({ error: "Failed to update file" }, 500);
//   }
// });

// DELETE /tablo-data/:tabloId/:fileName - Delete a file
tabloDataRouter.delete("/:tabloId/:fileName", checkTabloAdmin, async (c) => {
  const tabloId = c.req.param("tabloId");
  const fileName = c.req.param("fileName");
  const s3_client = c.get("s3_client");

  try {
    const { DeleteObjectCommand } = await import("@aws-sdk/client-s3");

    await s3_client.send(
      new DeleteObjectCommand({
        Bucket: "tablo-data",
        Key: `${tabloId}/${fileName}`,
      })
    );

    return c.json({
      message: "File deleted successfully",
      fileName,
      tabloId,
    });
  } catch (error) {
    console.error("Error deleting file:", error);
    return c.json({ error: "Failed to delete file" }, 500);
  }
});