import { data, type ActionFunctionArgs } from "react-router";
import { getAuth } from "@clerk/react-router/server";
import {
  findSeasonById,
  updateSeason,
  updateSeasonStatus,
  findTeamsBySeasonId,
  isCommissioner,
  createDraftPick,
  isParticipantDrafted,
  updateTeamTimer,
  getSeasonTimers,
  calculatePickInfo,
  getTeamForPick,
  findDraftSlotsBySeasonId,
  removeFromQueue,
  getTeamQueue,
} from "~/models";
import { getSocketIO } from "../../../server/socket.js";

export async function action(args: ActionFunctionArgs) {
  const { userId } = await getAuth(args);
  if (!userId) {
    return data({ error: "Unauthorized" }, { status: 401 });
  }

  const { request } = args;
  const formData = await request.formData();
  
  const seasonId = formData.get("seasonId");
  const teamId = formData.get("teamId");
  const participantId = formData.get("participantId");

  if (!seasonId || typeof seasonId !== "string") {
    return data({ error: "Season ID is required" }, { status: 400 });
  }

  if (!teamId || typeof teamId !== "string") {
    return data({ error: "Team ID is required" }, { status: 400 });
  }

  if (!participantId || typeof participantId !== "string") {
    return data({ error: "Participant ID is required" }, { status: 400 });
  }

  try {
    // Get season
    const season = await findSeasonById(seasonId);
    if (!season) {
      return data({ error: "Season not found" }, { status: 404 });
    }

    // Check if draft has started
    if (!season.draftStartedAt) {
      return data({ error: "Draft has not started" }, { status: 400 });
    }

    // Check if draft is paused
    if (season.draftPaused) {
      return data({ error: "Draft is currently paused" }, { status: 400 });
    }

    // Check if draft is complete
    const teams = await findTeamsBySeasonId(seasonId);
    const totalPicks = season.draftRounds * teams.length;
    const currentPickNumber = season.currentPickNumber || 1;

    if (currentPickNumber > totalPicks) {
      return data({ error: "Draft is already complete" }, { status: 400 });
    }

    // Get draft slots to determine current team
    const draftSlots = await findDraftSlotsBySeasonId(seasonId);
    const draftOrder = draftSlots.map((slot: any) => ({
      teamId: slot.teamId,
      draftOrder: slot.draftOrder,
    }));

    const currentTeamId = getTeamForPick(currentPickNumber, draftOrder);

    if (!currentTeamId) {
      return data({ error: "Could not determine current team" }, { status: 400 });
    }

    // Verify it's the correct team's turn
    if (teamId !== currentTeamId) {
      return data({ error: "It is not this team's turn" }, { status: 400 });
    }

    // Verify user has permission (team owner or commissioner)
    const team = teams.find((t: any) => t.id === teamId);
    const isTeamOwner = team?.ownerId === userId;
    const isUserCommissioner = await isCommissioner(season.leagueId, userId);

    if (!isTeamOwner && !isUserCommissioner) {
      return data({ error: "You do not have permission to make this pick" }, { status: 403 });
    }

    // Check if participant is already drafted
    const isDrafted = await isParticipantDrafted(seasonId, participantId);
    if (isDrafted) {
      return data({ error: "This participant has already been drafted" }, { status: 400 });
    }

    // Calculate pick info
    const { round, pickInRound } = calculatePickInfo(currentPickNumber, teams.length);

    // Determine picked by type
    const pickedByType = isUserCommissioner && !isTeamOwner ? "commissioner" : "owner";

    // Create the draft pick
    const pick = await createDraftPick({
      seasonId,
      teamId,
      participantId,
      pickNumber: currentPickNumber,
      round,
      pickInRound,
      pickedByUserId: userId,
      pickedByType,
      timeUsed: 0,
    });

    // Remove from queue if it was queued
    const queue = await getTeamQueue(teamId);
    const queueItem = queue.find((item: any) => item.participantId === participantId);
    if (queueItem) {
      await removeFromQueue(queueItem.id);
    }

    // Update season to next pick
    const nextPickNumber = currentPickNumber + 1;
    await updateSeason(seasonId, { currentPickNumber: nextPickNumber });

    // Add increment time to current team's timer
    if (season.draftIncrementTime) {
      const timers = await getSeasonTimers(seasonId);
      const currentTimer = timers.find((t: any) => t.teamId === teamId);
      if (currentTimer) {
        const newTime = currentTimer.timeRemaining + season.draftIncrementTime;
        await updateTeamTimer(teamId, newTime);
      }
    }

    // Check if draft is complete
    const io = getSocketIO();
    if (nextPickNumber > totalPicks) {
      await updateSeasonStatus(seasonId, "active");
      io.to(`draft-${seasonId}`).emit("draft-completed", {
        seasonId,
      });
    }

    // Broadcast pick to all clients in the room
    io.to(`draft-${seasonId}`).emit("pick-made", {
      pick,
      nextPickNumber,
      isDraftComplete: nextPickNumber > totalPicks,
    });

    // Emit queue update to team owner
    const updatedQueue = await getTeamQueue(teamId);
    io.to(`draft-${seasonId}`).emit("queue-updated", {
      teamId,
      queue: updatedQueue,
    });

    return data({ success: true, pick });
  } catch (error) {
    console.error("Error making pick:", error);
    return data({
      error: error instanceof Error ? error.message : "Failed to make pick",
    }, { status: 500 });
  }
}