/**
 * Dashboard page.
 *
 * Composes the fail2ban server status bar at the top, a shared time-range
 * selector, and the ban list showing aggregate bans from the fail2ban
 * database.  The time-range selection controls how far back to look.
 */

import { useState } from "react";
import { Text, makeStyles, tokens } from "@fluentui/react-components";
import { BanTable } from "../components/BanTable";
import { BanTrendChart } from "../components/BanTrendChart";
import { ChartStateWrapper } from "../components/ChartStateWrapper";
import { DashboardFilterBar } from "../components/DashboardFilterBar";
import { ServerStatusBar } from "../components/ServerStatusBar";
import { TopCountriesBarChart } from "../components/TopCountriesBarChart";
import { TopCountriesPieChart } from "../components/TopCountriesPieChart";
import { useDashboardCountryData } from "../hooks/useDashboardCountryData";
import type { BanOriginFilter, TimeRange } from "../types/ban";


// ---------------------------------------------------------------------------
// Styles
// ---------------------------------------------------------------------------

const useStyles = makeStyles({
  root: {
    display: "flex",
    flexDirection: "column",
    gap: tokens.spacingVerticalM,
  },
  section: {
    display: "flex",
    flexDirection: "column",
    gap: tokens.spacingVerticalS,
    backgroundColor: tokens.colorNeutralBackground1,
    borderRadius: tokens.borderRadiusMedium,
    borderTopWidth: "1px",
    borderTopStyle: "solid",
    borderTopColor: tokens.colorNeutralStroke2,
    borderRightWidth: "1px",
    borderRightStyle: "solid",
    borderRightColor: tokens.colorNeutralStroke2,
    borderBottomWidth: "1px",
    borderBottomStyle: "solid",
    borderBottomColor: tokens.colorNeutralStroke2,
    borderLeftWidth: "1px",
    borderLeftStyle: "solid",
    borderLeftColor: tokens.colorNeutralStroke2,
    padding: tokens.spacingVerticalM,
  },
  sectionHeader: {
    display: "flex",
    alignItems: "center",
    justifyContent: "space-between",
    flexWrap: "wrap",
    gap: tokens.spacingHorizontalM,
    paddingBottom: tokens.spacingVerticalS,
    borderBottomWidth: "1px",
    borderBottomStyle: "solid",
    borderBottomColor: tokens.colorNeutralStroke2,
  },
  tabContent: {
    paddingTop: tokens.spacingVerticalS,
  },
  chartsRow: {
    display: "flex",
    flexDirection: "row",
    gap: tokens.spacingHorizontalL,
    flexWrap: "wrap",
  },
  chartCard: {
    flex: "1 1 300px",
    minWidth: "280px",
  },
});

// ---------------------------------------------------------------------------
// Component
// ---------------------------------------------------------------------------

/**
 * Main dashboard landing page.
 *
 * Displays the fail2ban server status, a time-range selector, and the
 * ban list table.
 */
export function DashboardPage(): React.JSX.Element {
  const styles = useStyles();
  const [timeRange, setTimeRange] = useState<TimeRange>("24h");
  const [originFilter, setOriginFilter] = useState<BanOriginFilter>("all");

  const { countries, countryNames, isLoading: countryLoading, error: countryError, reload: reloadCountry } =
    useDashboardCountryData(timeRange, originFilter);

  return (
    <div className={styles.root}>
      {/* ------------------------------------------------------------------ */}
      {/* Server status bar                                                   */}
      {/* ------------------------------------------------------------------ */}
      <ServerStatusBar />

      {/* ------------------------------------------------------------------ */}
      {/* Global filter bar                                                  */}
      {/* ------------------------------------------------------------------ */}
      <DashboardFilterBar
        timeRange={timeRange}
        onTimeRangeChange={setTimeRange}
        originFilter={originFilter}
        onOriginFilterChange={setOriginFilter}
      />

      {/* ------------------------------------------------------------------ */}
      {/* Ban Trend section                                                   */}
      {/* ------------------------------------------------------------------ */}
      <div className={styles.section}>
        <div className={styles.sectionHeader}>
          <Text as="h2" size={500} weight="semibold">
            Ban Trend
          </Text>
        </div>
        <div className={styles.tabContent}>
          <BanTrendChart timeRange={timeRange} origin={originFilter} />
        </div>
      </div>

      {/* ------------------------------------------------------------------ */}
      {/* Charts section                                                      */}
      {/* ------------------------------------------------------------------ */}
      <div className={styles.section}>
        <div className={styles.sectionHeader}>
          <Text as="h2" size={500} weight="semibold">
            Top Countries
          </Text>
        </div>
        <div className={styles.tabContent}>
          <ChartStateWrapper
            isLoading={countryLoading}
            error={countryError}
            onRetry={reloadCountry}
            isEmpty={!countryLoading && Object.keys(countries).length === 0}
            emptyMessage="No ban data for the selected period."
          >
            <div className={styles.chartsRow}>
              <div className={styles.chartCard}>
                <TopCountriesPieChart
                  countries={countries}
                  countryNames={countryNames}
                />
              </div>
              <div className={styles.chartCard}>
                <TopCountriesBarChart
                  countries={countries}
                  countryNames={countryNames}
                />
              </div>
            </div>
          </ChartStateWrapper>
        </div>
      </div>

      {/* ------------------------------------------------------------------ */}
      {/* Ban list section                                                    */}
      {/* ------------------------------------------------------------------ */}
      <div className={styles.section}>
        <div className={styles.sectionHeader}>
          <Text as="h2" size={500} weight="semibold">
            Ban List
          </Text>
        </div>

        {/* Ban table */}
        <div className={styles.tabContent}>
          <BanTable timeRange={timeRange} origin={originFilter} />
        </div>
      </div>
    </div>
  );
}