import {
  Avatar,
  Colors,
  DateTimePicker,
  LoaderScreen,
  Modal,
  Picker,
  Switch,
  Text,
  TextField,
  View,
} from "react-native-ui-lib";
import { ScrollView, TouchableOpacity } from "react-native-gesture-handler";
import { useSafeAreaInsets } from "react-native-safe-area-context";
import { useState } from "react";
import { MaterialIcons } from "@expo/vector-icons";
import { PickerMultiValue } from "react-native-ui-lib/src/components/picker/types";
import { useAuthContext } from "@/contexts/AuthContext";
import { useCreateEvent } from "@/hooks/firebase/useCreateEvent";
import { EventData } from "@/hooks/firebase/types/eventData";

const daysOfWeek = [
  { label: "Monday", value: "monday" },
  { label: "Tuesday", value: "tuesday" },
  { label: "Wednesday", value: "wednesday" },
  { label: "Thursday", value: "thursday" },
  { label: "Friday", value: "friday" },
  { label: "Saturday", value: "saturday" },
  { label: "Sunday", value: "sunday" },
];

export const ManuallyAddEventModal = ({
  show,
  close,
}: {
  show: boolean;
  close: () => void;
}) => {
  const { user } = useAuthContext();
  const insets = useSafeAreaInsets();

  const [title, setTitle] = useState<string>("");

  const [isAllDay, setIsAllDay] = useState(false);
  const [startTime, setStartTime] = useState(initialDate ?? new Date());
  const [endTime, setEndTime] = useState(new Date());

  const [startDate, setStartDate] = useState(new Date());
  const [endDate, setEndDate] = useState(new Date());

  const [repeatInterval, setRepeatInterval] = useState<PickerMultiValue>([]);

  const { mutateAsync: createEvent, isLoading, isError } = useCreateEvent();

  const formatDateTime = (date: Date) => {
    return date.toLocaleDateString("en-US", {
      weekday: "long",
      month: "short",
      day: "numeric",
    });
  };

  const combineDateAndTime = (date: Date, time: Date): Date => {
    const combined = new Date(date);
    combined.setHours(time.getHours());
    combined.setMinutes(time.getMinutes());
    combined.setSeconds(0);
    combined.setMilliseconds(0);
    return combined;
  };

  const handleSave = async () => {
    let finalStartDate: Date;
    let finalEndDate: Date;

    if (isAllDay) {
      finalStartDate = new Date(startDate);
      finalStartDate.setHours(0, 0, 0, 0);

      finalEndDate = new Date(startDate);
      finalEndDate.setHours(23, 59, 59, 999);
    } else {
      finalStartDate = combineDateAndTime(startDate, startTime);
      finalEndDate = combineDateAndTime(endDate, endTime);
    }

    const eventData: Partial<EventData> = {
      title,
      startDate: finalStartDate,
      endDate: finalEndDate,
      repeatDays: repeatInterval.map((x) => x.toString()),
      allDay: isAllDay,
    };

    await createEvent(eventData);

    close();
  };

  const getRepeatLabel = () => {
    const selectedDays = repeatInterval;
    const allDays = [
      "sunday",
      "monday",
      "tuesday",
      "wednesday",
      "thursday",
      "friday",
      "saturday",
    ];
    const workDays = ["monday", "tuesday", "wednesday", "thursday", "friday"];

    const isEveryWorkDay = workDays.every((day) => selectedDays.includes(day));

    const isEveryDay = allDays.every((day) => selectedDays.includes(day));

    if (isEveryDay) {
      return "Every day";
    } else if (
      isEveryWorkDay &&
      !selectedDays.includes("saturday") &&
      !selectedDays.includes("sunday")
    ) {
      return "Every work day";
    } else {
      return selectedDays
        .map((item) => daysOfWeek.find((day) => day.value === item)?.label)
        .join(", ");
    }
  };

  if (isLoading && !isError) {
    return (
      <Modal
        visible={show}
        animationType="slide"
        onRequestClose={close}
        transparent={false}
      >
        <LoaderScreen message={"Saving event..."} color={Colors.grey40} />
      </Modal>
    );
  }

  return (
    <Modal
      visible={show}
      animationType="slide"
      onRequestClose={close}
      transparent={false}
    >
      <View
        style={{
          flex: 1,
          backgroundColor: "#fff",
          paddingTop: insets.top, // Safe area inset for top
          paddingBottom: insets.bottom, // Safe area inset for bottom
          paddingLeft: insets.left, // Safe area inset for left
          paddingRight: insets.right, // Safe area inset for right
        }}
      >
        <View
          style={{
            flexDirection: "row",
            justifyContent: "space-between",
            padding: 16,
          }}
        >
          <TouchableOpacity onPress={close}>
            <Text style={{ color: "#007bff" }}>Cancel</Text>
          </TouchableOpacity>
          <Text style={{ fontWeight: "bold", fontSize: 16 }}>Add event</Text>
          <TouchableOpacity onPress={handleSave}>
            <Text style={{ color: "#007bff" }}>Save</Text>
          </TouchableOpacity>
        </View>

        <ScrollView
          contentContainerStyle={{ paddingHorizontal: 16, paddingTop: 10 }}
        >
          <View style={{ marginVertical: 10 }}>
            <TextField
              placeholder={"Title"}
              floatingPlaceholder
              value={title}
              onChangeText={setTitle}
              showCharCounter
              maxLength={200}
              fieldStyle={{
                borderBottomWidth: 1,
                borderBottomColor: "black",
                borderStyle: "solid",
              }}
            />
          </View>

          <View
            style={{
              flexDirection: "row",
              justifyContent: "space-between",
              alignItems: "center",
              marginBottom: 20,
            }}
          >
            <View style={{ flexDirection: "row", alignItems: "center" }}>
              <MaterialIcons name="schedule" size={24} color="gray" />
              <Text style={{ marginLeft: 10 }}>All-day</Text>
            </View>
            <Switch
              value={isAllDay}
              onValueChange={(value) => setIsAllDay(value)}
            />
          </View>

          <View
            style={{
              flexDirection: "row",
              justifyContent: "space-between",
              alignItems: "center",
              marginBottom: 20,
            }}
          >
            <DateTimePicker
              mode="date"
              dateFormatter={formatDateTime}
              value={startDate}
              onChange={setStartDate}
              display="default"
            />
            {!isAllDay && (
              <DateTimePicker
                mode="time"
                value={startTime}
                onChange={setStartTime}
                display="spinner"
              />
            )}
          </View>

          {!isAllDay && (
            <View
              style={{
                flexDirection: "row",
                justifyContent: "space-between",
                alignItems: "center",
                marginBottom: 20,
              }}
            >
              <DateTimePicker
                mode="date"
                dateFormatter={formatDateTime}
                value={endDate}
                onChange={setEndDate}
                display="default"
              />
              <DateTimePicker
                mode="time"
                value={endTime}
                onChange={setEndTime}
                minuteInterval={1}
                display="spinner"
              />
            </View>
          )}

          <View
            style={{
              flexDirection: "row",
              alignItems: "center",
              marginBottom: 20,
            }}
          >
            <MaterialIcons name="repeat" size={24} color="gray" />
            <Picker
              value={repeatInterval}
              //@ts-ignore
              onChange={(items: PickerMultiValue) => setRepeatInterval(items)}
              placeholder="Doest not repeat"
              style={{ marginLeft: 10, flex: 1 }}
              mode={Picker.modes.MULTI}
              getLabel={getRepeatLabel}
            >
              {daysOfWeek.map((option) => (
                <Picker.Item
                  key={option.value}
                  label={option.label}
                  value={option.value}
                />
              ))}
            </Picker>
          </View>

          <View
            style={{
              flexDirection: "row",
              alignItems: "center",
              marginBottom: 20,
            }}
          >
            <MaterialIcons name="person-add" size={24} color="gray" />
            <TouchableOpacity
              style={{
                marginLeft: 10,
                flexDirection: "row",
                alignItems: "center",
                flex: 1,
              }}
            >
              <Avatar size={40} backgroundColor={Colors.yellow10} />
              <View style={{ marginLeft: 10 }}>
                <Text>Other</Text>
                <Text style={{ color: "gray" }}>{user?.email}</Text>
              </View>
            </TouchableOpacity>
          </View>
        </ScrollView>
      </View>
    </Modal>
  );
};