import { Hono } from "jsr:@hono/hono@4";
import { sqlWrapper } from "../../db.ts";
import { auditWrapper } from "../../audit.ts";
import { getAuthenticatedUser } from "../../auth-session.ts";
import { getClientIp } from "../../middleware.ts";

export const rolesAdminRoutes = new Hono();

rolesAdminRoutes.get("/", async (c) => {
  const auth = await getAuthenticatedUser(c);
  if (!auth) return c.json({ error: "Unauthorized" }, 401);

  const appId = c.req.query("appId");
  let roles;
  if (appId) {
    roles = await sqlWrapper.sql`
      SELECT r.id, r.name, r.description, r.app_id, r.created_at,
             a.name AS app_name
      FROM roles r
      LEFT JOIN apps a ON r.app_id = a.id
      WHERE r.app_id IS NULL OR r.app_id = ${appId}
      ORDER BY r.app_id NULLS FIRST, r.name ASC
    `;
  } else {
    roles = await sqlWrapper.sql`
      SELECT r.id, r.name, r.description, r.app_id, r.created_at,
             a.name AS app_name
      FROM roles r
      LEFT JOIN apps a ON r.app_id = a.id
      ORDER BY r.app_id NULLS FIRST, r.name ASC
    `;
  }

  return c.json({ roles });
});

rolesAdminRoutes.post("/", async (c) => {
  const auth = await getAuthenticatedUser(c);
  if (!auth) return c.json({ error: "Unauthorized" }, 401);

  const { name, description, appId } = await c.req.json();
  if (
    !name || typeof name !== "string" || name.trim().length < 2 ||
    name.trim().length > 32
  ) {
    return c.json(
      { error: "Role name must be between 2 and 32 characters" },
      400,
    );
  }

  const normalizedName = name.trim().toLowerCase().replace(/[^a-z0-9_-]/g, "_");

  let validatedAppId = null;
  if (appId && typeof appId === "string" && appId.trim()) {
    const uuidRegex =
      /^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$/;
    if (!uuidRegex.test(appId)) {
      return c.json({ error: "Invalid App UUID" }, 400);
    }
    const appExists = await sqlWrapper
      .sql`SELECT id, name FROM apps WHERE id = ${appId}`
      .then((res: any) => res[0]);
    if (!appExists) {
      return c.json({ error: "Selected application does not exist" }, 404);
    }
    validatedAppId = appId;
  }

  try {
    const newRole = await sqlWrapper.sql`
      INSERT INTO roles (name, description, app_id)
      VALUES (${normalizedName}, ${
      description?.trim() || null
    }, ${validatedAppId})
      RETURNING id, name, description, app_id, created_at
    `.then((res: any) => res[0]);

    auditWrapper.auditLog(auth.userId, "role_created", validatedAppId, {
      role_name: newRole.name,
      scope: validatedAppId ? "app-specific" : "global",
    }, getClientIp(c));

    return c.json({ success: true, role: newRole });
  } catch (err: any) {
    if (err.code === "23505") {
      return c.json({
        error: "This role already exists for the selected scope",
      }, 409);
    }
    return c.json({ error: "Failed to create role" }, 500);
  }
});

rolesAdminRoutes.put("/:id", async (c) => {
  const auth = await getAuthenticatedUser(c);
  if (!auth) return c.json({ error: "Unauthorized" }, 401);

  const roleId = c.req.param("id");
  const { name, description } = await c.req.json();

  if (!name || typeof name !== "string" || name.trim().length < 2) {
    return c.json({ error: "Role name must be at least 2 characters" }, 400);
  }

  const normalizedName = name.trim().toLowerCase().replace(/[^a-z0-9_-]/g, "_");

  try {
    const updatedRole = await sqlWrapper.sql`
      UPDATE roles
      SET name = ${normalizedName},
          description = ${description?.trim() || null}
      WHERE id = ${roleId}
      RETURNING id, name, description, app_id, created_at
    `.then((res: any) => res[0]);

    if (!updatedRole) return c.json({ error: "Role not found" }, 404);

    auditWrapper.auditLog(auth.userId, "role_updated", updatedRole.app_id, {
      role_name: updatedRole.name,
    }, getClientIp(c));

    return c.json({ success: true, role: updatedRole });
  } catch (_err: any) {
    return c.json({ error: "Failed to update role" }, 500);
  }
});

rolesAdminRoutes.delete("/:id", async (c) => {
  const auth = await getAuthenticatedUser(c);
  if (!auth) return c.json({ error: "Unauthorized" }, 401);

  const roleId = c.req.param("id");
  const role = await sqlWrapper
    .sql`SELECT id, name, app_id FROM roles WHERE id = ${roleId}`.then(
      (res: any) => res[0],
    );
  if (!role) {
    return c.json({ error: "Role not found" }, 404);
  }

  if (role.name === "admin" && role.app_id === null) {
    return c.json({ error: "The global 'admin' role cannot be deleted" }, 400);
  }

  await sqlWrapper.sql`DELETE FROM roles WHERE id = ${roleId}`;
  auditWrapper.auditLog(
    auth.userId,
    "role_deleted",
    role.app_id,
    { role_name: role.name },
    getClientIp(c),
  );
  return c.json({ success: true });
});