import { getAuth } from "@clerk/react-router/server";
import { database } from "~/database/context";
import * as schema from "~/database/schema";
import { eq, and, asc } from "drizzle-orm";
import { getSocketIO } from "~/server/socket";
import { isUserAdminByClerkId } from "~/models/user";
import { getTeamForPick } from "~/lib/draft-order";
import { logger } from "~/lib/logger";

import type { ActionFunctionArgs } from "react-router";
export async function action(args: ActionFunctionArgs) {
  const { request } = args;
  const { userId } = await getAuth(args);

  if (!userId) {
    return Response.json({ error: "Unauthorized" }, { status: 401 });
  }

  const formData = await request.formData();
  const seasonId = formData.get("seasonId") as string;
  const teamId = formData.get("teamId") as string;
  const isEnabled = formData.get("isEnabled") === "true";
  const mode = formData.get("mode") as "next_pick" | "while_on";
  const queueOnly = formData.get("queueOnly") === "true";

  if (!seasonId || !teamId || !mode) {
    return Response.json({ error: "Missing required fields" }, { status: 400 });
  }

  const db = database();

  // Fetch team and season in parallel
  const [team, season] = await Promise.all([
    db.query.teams.findFirst({ where: eq(schema.teams.id, teamId) }),
    db.query.seasons.findFirst({ where: eq(schema.seasons.id, seasonId) }),
  ]);

  if (!team || !season) {
    return Response.json({ error: "Team or season not found" }, { status: 404 });
  }

  const isOwner = team.ownerId === userId;

  let isActingAsCommissioner = false;
  if (!isOwner) {
    const [commissioner, userIsAdmin] = await Promise.all([
      db.query.commissioners.findFirst({
        where: and(
          eq(schema.commissioners.leagueId, season.leagueId),
          eq(schema.commissioners.userId, userId)
        ),
      }),
      isUserAdminByClerkId(userId),
    ]);

    if (!commissioner && !userIsAdmin) {
      return Response.json({ error: "Unauthorized" }, { status: 403 });
    }
    isActingAsCommissioner = true;
  }

  const resolvedSource: "commissioner" | "user" = isActingAsCommissioner ? "commissioner" : "user";

  // Check if autodraft settings exist
  const existingSettings = await db.query.autodraftSettings.findFirst({
    where: and(
      eq(schema.autodraftSettings.seasonId, seasonId),
      eq(schema.autodraftSettings.teamId, teamId)
    ),
  });

  let settings;
  if (existingSettings) {
    // Update existing settings
    [settings] = await db
      .update(schema.autodraftSettings)
      .set({
        isEnabled,
        mode,
        queueOnly,
        updatedAt: new Date(),
      })
      .where(eq(schema.autodraftSettings.id, existingSettings.id))
      .returning();
  } else {
    // Create new settings
    [settings] = await db
      .insert(schema.autodraftSettings)
      .values({
        seasonId,
        teamId,
        isEnabled,
        mode,
        queueOnly,
      })
      .returning();
  }

  // Emit socket event to notify all clients in the draft room
  const io = getSocketIO();
  io.to(`draft-${seasonId}`).emit("autodraft-updated", {
    teamId,
    isEnabled,
    mode,
    queueOnly,
    source: resolvedSource,
  });

  // If commissioner enables autodraft for the team currently on the clock, fire immediately
  if (isEnabled && isActingAsCommissioner) {
    import("~/models/draft-utils").then(async ({ executeAutoPick }) => {
      const freshSeason = await db.query.seasons.findFirst({
        where: eq(schema.seasons.id, seasonId),
      });
      if (!freshSeason || freshSeason.status !== "draft") return;

      const currentPickNumber = freshSeason.currentPickNumber ?? 1;
      const draftSlots = await db.query.draftSlots.findMany({
        where: eq(schema.draftSlots.seasonId, seasonId),
        orderBy: asc(schema.draftSlots.draftOrder),
      });

      const currentSlot = getTeamForPick(currentPickNumber, draftSlots);
      if (!currentSlot || currentSlot.teamId !== teamId) return;

      // Team is on the clock — trigger autopick
      await executeAutoPick({
        seasonId,
        teamId,
        pickNumber: currentPickNumber,
        triggeredBy: "commissioner",
        db,
      });
    }).catch((err) => {
      logger.error("[AutodraftUpdate] Mid-turn autopick failed:", err);
    });
  }

  return Response.json({ success: true, settings });
}