"use client";

import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
import { toast } from "sonner";
import { api } from "@/lib/api";
import { useAuthContext } from "@/context/auth-context";
import type { CreateChannelRequest, UpdateChannelRequest } from "@/lib/types";

export function useConfig() {
  return useQuery({
    queryKey: ["config"],
    queryFn: () => api.config.get(),
    staleTime: Infinity, // config doesn't change at runtime
  });
}

export function useChannels() {
  const { token } = useAuthContext();
  return useQuery({
    queryKey: ["channels"],
    // Public endpoint — no token needed for TV viewing
    queryFn: () => api.channels.list(token ?? ""),
  });
}

export function useChannel(id: string) {
  const { token } = useAuthContext();
  return useQuery({
    queryKey: ["channel", id],
    queryFn: () => api.channels.get(id, token!),
    enabled: !!token && !!id,
  });
}

export function useCreateChannel() {
  const { token } = useAuthContext();
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: (data: CreateChannelRequest) =>
      api.channels.create(data, token!),
    onSuccess: (channel) => {
      queryClient.invalidateQueries({ queryKey: ["channels"] });
      toast.success(`Channel "${channel.name}" created`);
    },
    onError: (e: Error) => toast.error(e.message),
  });
}

export function useUpdateChannel() {
  const { token } = useAuthContext();
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: ({ id, data }: { id: string; data: UpdateChannelRequest }) =>
      api.channels.update(id, data, token!),
    onSuccess: (updated) => {
      queryClient.invalidateQueries({ queryKey: ["channels"] });
      queryClient.invalidateQueries({ queryKey: ["channel", updated.id] });
      toast.success(`Channel "${updated.name}" saved`);
    },
    onError: (e: Error) => toast.error(e.message),
  });
}

export function useDeleteChannel() {
  const { token } = useAuthContext();
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: (id: string) => api.channels.delete(id, token!),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ["channels"] });
      toast.success("Channel deleted");
    },
    onError: (e: Error) => toast.error(e.message),
  });
}

export function useGenerateSchedule() {
  const { token } = useAuthContext();
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: (channelId: string) =>
      api.schedule.generate(channelId, token!),
    onSuccess: (_, channelId) => {
      queryClient.invalidateQueries({ queryKey: ["schedule", channelId] });
      toast.success("Schedule generated");
    },
    onError: (e: Error) => toast.error(`Schedule failed: ${e.message}`),
  });
}

export function useActiveSchedule(channelId: string) {
  const { token } = useAuthContext();
  return useQuery({
    queryKey: ["schedule", channelId],
    queryFn: () => api.schedule.getActive(channelId, token!),
    enabled: !!token && !!channelId,
    retry: false,
  });
}

export function useCurrentBroadcast(channelId: string, channelPassword?: string) {
  const { token } = useAuthContext();
  return useQuery({
    queryKey: ["broadcast", channelId, channelPassword],
    queryFn: () => api.schedule.getCurrentBroadcast(channelId, token ?? "", channelPassword),
    enabled: !!channelId,
    refetchInterval: 30_000,
    retry: false,
  });
}

export function useEpg(channelId: string, from?: string, until?: string, channelPassword?: string) {
  const { token } = useAuthContext();
  return useQuery({
    queryKey: ["epg", channelId, from, until, channelPassword],
    queryFn: () => api.schedule.getEpg(channelId, token ?? "", from, until, channelPassword),
    enabled: !!channelId,
  });
}