"use client";

import { cn } from "@app/lib/cn";
import {
    aiUsageAnalyticsFiltersSchema,
    aiUsageAnalyticsQueries,
    type AiUsageAnalyticsFilters
} from "@app/lib/queries";
import { useIsFetching, useQuery, useQueryClient } from "@tanstack/react-query";
import { RefreshCw, XIcon } from "lucide-react";
import { usePathname, useRouter, useSearchParams } from "next/navigation";
import { DateRangePicker, type DateTimeValue } from "./DateTimePicker";
import { Button } from "./ui/button";
import { Card, CardHeader } from "./ui/card";
import { Label } from "./ui/label";
import {
    Select,
    SelectContent,
    SelectItem,
    SelectTrigger,
    SelectValue
} from "./ui/select";
import { Separator } from "./ui/separator";
import { getSevenDaysAgo } from "@app/lib/getSevenDaysAgo";
import { HorizontalTabs, type TabItem } from "./HorizontalTabs";
import { OverviewTab } from "./ai-usage-analytics/OverviewTab";
import { ProvidersTab } from "./ai-usage-analytics/ProvidersTab";
import { ResourcesTab } from "./ai-usage-analytics/ResourcesTab";
import { UsersRolesTab } from "./ai-usage-analytics/UsersRolesTab";

export type AiUsageAnalyticsDataProps = {
    orgId: string;
};

const AI_USAGE_ANALYTICS_QUERY_PREFIX = ["AI_USAGE_ANALYTICS"];

export function AiUsageAnalyticsData(props: AiUsageAnalyticsDataProps) {
    const searchParams = useSearchParams();
    const path = usePathname();
    const router = useRouter();
    const queryClient = useQueryClient();

    const filters = aiUsageAnalyticsFiltersSchema.parse(
        Object.fromEntries(searchParams.entries())
    );

    const isEmptySearchParams = Object.values(filters).every(
        (v) => v === undefined
    );

    const dateRange = {
        startDate: filters.timeStart
            ? new Date(filters.timeStart)
            : getSevenDaysAgo(),
        endDate: filters.timeEnd ? new Date(filters.timeEnd) : new Date()
    };

    const { data: filterOptions } = useQuery(
        aiUsageAnalyticsQueries.filterOptions({
            orgId: props.orgId,
            filters: {
                timeStart: filters.timeStart,
                timeEnd: filters.timeEnd
            }
        })
    );

    const isFetching =
        useIsFetching({
            queryKey: [...AI_USAGE_ANALYTICS_QUERY_PREFIX, props.orgId]
        }) > 0;

    function setFilter(key: keyof AiUsageAnalyticsFilters, value?: string) {
        const newSearch = new URLSearchParams(searchParams);
        newSearch.delete(key);
        if (value !== undefined) {
            newSearch.set(key, value);
        }
        router.replace(`${path}?${newSearch.toString()}`);
    }

    function handleTimeRangeUpdate(start: DateTimeValue, end: DateTimeValue) {
        const newSearch = new URLSearchParams(searchParams);
        const timeRegex =
            /^(?<hours>\d{1,2})\:(?<minutes>\d{1,2})(\:(?<seconds>\d{1,2}))?$/;

        if (start.date) {
            const startDate = new Date(start.date);
            if (start.time) {
                const time = timeRegex.exec(start.time);
                const groups = time?.groups ?? {};
                startDate.setHours(Number(groups.hours));
                startDate.setMinutes(Number(groups.minutes));
                if (groups.seconds) {
                    startDate.setSeconds(Number(groups.seconds));
                }
            }
            newSearch.set("timeStart", startDate.toISOString());
        }
        if (end.date) {
            const endDate = new Date(end.date);
            if (end.time) {
                const time = timeRegex.exec(end.time);
                const groups = time?.groups ?? {};
                endDate.setHours(Number(groups.hours));
                endDate.setMinutes(Number(groups.minutes));
                if (groups.seconds) {
                    endDate.setSeconds(Number(groups.seconds));
                }
            }
            newSearch.set("timeEnd", endDate.toISOString());
        }
        router.replace(`${path}?${newSearch.toString()}`);
    }

    function getDateTime(date: Date) {
        return `${date.getHours()}:${date.getMinutes()}`;
    }

    const providerOptions = (filterOptions?.providers ?? []).map((p) => ({
        value: String(p.id),
        label: p.name ?? `Provider #${p.id}`
    }));
    const modelOptions = (filterOptions?.models ?? []).map((m) => ({
        value: m,
        label: m
    }));
    const resourceOptions = (filterOptions?.resources ?? []).map((r) => ({
        value: String(r.id),
        label: r.name ?? `Resource #${r.id}`
    }));
    const roleOptions = (filterOptions?.roles ?? []).map((r) => ({
        value: String(r.id),
        label: r.name ?? `Role #${r.id}`
    }));
    const userOptions = (filterOptions?.users ?? []).map((u) => ({
        value: u.id,
        label: u.email ?? u.id
    }));

    const tabs: TabItem[] = [
        { title: "Overview", href: "#" },
        { title: "Provider Usage", href: "#" },
        { title: "Resources", href: "#" },
        { title: "Users & Roles", href: "#" }
    ];

    return (
        <div className="flex flex-col gap-5">
            <Card>
                <CardHeader className="flex flex-col gap-4">
                    <div className="flex flex-col lg:flex-row items-start lg:items-end w-full gap-2">
                        <DateRangePicker
                            startValue={{
                                date: dateRange.startDate,
                                time: dateRange.startDate
                                    ? getDateTime(dateRange.startDate)
                                    : undefined
                            }}
                            endValue={{
                                date: dateRange.endDate,
                                time: dateRange.endDate
                                    ? getDateTime(dateRange.endDate)
                                    : undefined
                            }}
                            onRangeChange={handleTimeRangeUpdate}
                            className="flex-wrap gap-2"
                        />

                        <Separator className="w-px h-6 self-end relative bottom-1.5 hidden lg:block" />

                        <div className="flex flex-wrap items-end gap-2">
                            <FilterSelect
                                id="providerId"
                                label="Provider"
                                value={filters.providerId?.toString()}
                                options={providerOptions}
                                placeholder="All Providers"
                                onValueChange={(v) => setFilter("providerId", v)}
                            />
                            <FilterSelect
                                id="model"
                                label="Model"
                                value={filters.model}
                                options={modelOptions}
                                placeholder="All Models"
                                onValueChange={(v) => setFilter("model", v)}
                            />
                            <FilterSelect
                                id="resourceId"
                                label="Resource"
                                value={filters.resourceId?.toString()}
                                options={resourceOptions}
                                placeholder="All Resources"
                                onValueChange={(v) => setFilter("resourceId", v)}
                            />
                            <FilterSelect
                                id="roleId"
                                label="Role"
                                value={filters.roleId?.toString()}
                                options={roleOptions}
                                placeholder="All Roles"
                                onValueChange={(v) => setFilter("roleId", v)}
                            />
                            <FilterSelect
                                id="userId"
                                label="User"
                                value={filters.userId}
                                options={userOptions}
                                placeholder="All Users"
                                onValueChange={(v) => setFilter("userId", v)}
                            />

                            {!isEmptySearchParams && (
                                <Button
                                    variant="ghost"
                                    onClick={() => router.replace(path)}
                                    className="gap-2"
                                >
                                    <XIcon className="size-4" />
                                    Reset Filters
                                </Button>
                            )}
                        </div>
                    </div>
                    <div className="flex justify-end">
                        <Button
                            variant="outline"
                            onClick={() =>
                                queryClient.invalidateQueries({
                                    queryKey: [
                                        ...AI_USAGE_ANALYTICS_QUERY_PREFIX,
                                        props.orgId
                                    ]
                                })
                            }
                            disabled={isFetching}
                            className="gap-2"
                        >
                            <RefreshCw
                                className={cn(
                                    "size-4",
                                    isFetching && "animate-spin"
                                )}
                            />
                            Refresh
                        </Button>
                    </div>
                </CardHeader>
            </Card>

            <HorizontalTabs items={tabs} clientSide>
                <OverviewTab orgId={props.orgId} filters={filters} />
                <ProvidersTab orgId={props.orgId} filters={filters} />
                <ResourcesTab orgId={props.orgId} filters={filters} />
                <UsersRolesTab orgId={props.orgId} filters={filters} />
            </HorizontalTabs>
        </div>
    );
}

type FilterSelectProps = {
    id: string;
    label: string;
    value?: string;
    options: { value: string; label: string }[];
    placeholder: string;
    onValueChange: (value?: string) => void;
};

function FilterSelect(props: FilterSelectProps) {
    return (
        <div className="flex flex-col items-start gap-2 w-44">
            <Label htmlFor={props.id}>{props.label}</Label>
            <Select
                onValueChange={(newValue) =>
                    props.onValueChange(
                        newValue === "all" ? undefined : newValue
                    )
                }
                value={props.value ?? "all"}
            >
                <SelectTrigger id={props.id} className="w-full">
                    <SelectValue placeholder={props.placeholder} />
                </SelectTrigger>
                <SelectContent className="w-full">
                    <SelectItem value="all">{props.placeholder}</SelectItem>
                    {props.options.map((option) => (
                        <SelectItem key={option.value} value={option.value}>
                            {option.label}
                        </SelectItem>
                    ))}
                </SelectContent>
            </Select>
        </div>
    );
}