"use client";

import * as React from "react";
import * as RechartsPrimitive from "recharts";
import { cn } from "@/shared/utils/utils";

// Format: { THEME_NAME: CSS_SELECTOR }
const THEMES = { light: "", dark: ".dark" } as const;

export type ChartConfig = {
  [k in string]: {
    label?: React.ReactNode;
    icon?: React.ComponentType;
  } & (
    | { color?: string; theme?: never }
    | { color?: never; theme: Record<keyof typeof THEMES, string> }
  );
};

type ChartContextProps = {
  config: ChartConfig;
};

const ChartContext = React.createContext<ChartContextProps | null>(null);

function useChart() {
  const context = React.useContext(ChartContext);
  if (!context) {
    throw new Error("useChart must be used within a <ChartContainer />");
  }
  return context;
}

export const ChartContainer = React.forwardRef<
  HTMLDivElement,
  React.ComponentProps<"div"> & {
    config: ChartConfig;
    children: React.ComponentProps<typeof RechartsPrimitive.ResponsiveContainer>["children"];
  }
>(({ id, className, children, config, ...props }, ref) => {
  const uniqueId = React.useId();
  const chartId = `chart-${id || uniqueId.replace(/:/g, "")}`;

  return (
    <ChartContext.Provider value={{ config }}>
      <div
        data-chart={chartId}
        ref={ref}
        className={cn(
          "flex aspect-video justify-center text-xs [&_.recharts-cartesian-axis-tick_text]:fill-muted-foreground [&_.recharts-cartesian-grid_line[stroke='#ccc']]:stroke-border/50 [&_.recharts-curve.recharts-tooltip-cursor]:stroke-border [&_.recharts-dot[aria-selected=true]]:stroke-transparent [&_.recharts-layer]:outline-none [&_.recharts-polar-grid_[stroke='#ccc']]:stroke-border [&_.recharts-radial-bar-background-sector]:fill-muted [&_.recharts-rectangle.recharts-tooltip-cursor]:fill-muted/20 [&_.recharts-reference-line_[stroke='#ccc']]:stroke-border [&_.recharts-sector[aria-selected=true]]:stroke-transparent [&_.recharts-sector]:outline-none [&_.recharts-surface]:outline-none",
          className
        )}
        {...props}
      >
        <ChartStyle id={chartId} config={config} />
        <RechartsPrimitive.ResponsiveContainer width="100%" height="100%">
          {children}
        </RechartsPrimitive.ResponsiveContainer>
      </div>
    </ChartContext.Provider>
  );
});
ChartContainer.displayName = "ChartContainer";

const ChartStyle = ({ id, config }: { id: string; config: ChartConfig }) => {
  const colorConfig = Object.entries(config).filter(
    ([, itemConfig]) => itemConfig.theme || itemConfig.color
  );

  if (!colorConfig.length) {
    return null;
  }

  return (
    <style
      dangerouslySetInnerHTML={{
        __html: Object.entries(THEMES)
          .map(
            ([theme, prefix]) => `
${prefix} [data-chart=${id}] {
${colorConfig
  .map(([key, itemConfig]) => {
    const color =
      itemConfig.theme?.[theme as keyof typeof itemConfig.theme] ||
      itemConfig.color;
    return color ? `  --color-${key}: ${color};` : null;
  })
  .filter(Boolean)
  .join("\n")}
}
`
          )
          .join("\n"),
      }}
    />
  );
};

export const ChartTooltip = RechartsPrimitive.Tooltip;

export type TooltipPayloadItem = {
  dataKey?: string | number;
  name?: string | number;
  value?: string | number | (string | number)[];
  payload?: Record<string, unknown>;
  color?: string;
  fill?: string;
  icon?: React.ComponentType;
  [key: string]: unknown;
};

interface ChartTooltipContentProps extends React.ComponentProps<"div"> {
  active?: boolean;
  payload?: TooltipPayloadItem[];
  label?: React.ReactNode;
  labelFormatter?: (
    label: React.ReactNode,
    payload: TooltipPayloadItem[]
  ) => React.ReactNode;
  labelClassName?: string;
  formatter?: (
    value: unknown,
    name: unknown,
    item: TooltipPayloadItem,
    index: number,
    payload: TooltipPayloadItem["payload"]
  ) => React.ReactNode;
  color?: string;
  hideLabel?: boolean;
  hideIndicator?: boolean;
  indicator?: "line" | "dot" | "dashed";
  nameKey?: string;
  labelKey?: string;
}

export const ChartTooltipContent = React.forwardRef<
  HTMLDivElement,
  ChartTooltipContentProps
>(
  (
    {
      active,
      payload,
      className,
      indicator = "dot",
      hideLabel = false,
      hideIndicator = false,
      label,
      labelFormatter,
      labelClassName,
      formatter,
      color,
      nameKey,
      labelKey,
    },
    ref
  ) => {
    const { config } = useChart();

    const tooltipLabel = React.useMemo(() => {
      if (hideLabel || !payload?.length) {
        return null;
      }

      const [item] = payload;
      const key = `${labelKey || item.dataKey || item.name || "value"}`;
      const itemConfig = getPayloadConfigFromPayload(config, item, key);
      const value =
        !labelKey && typeof label === "string"
          ? config[label]?.label || label
          : itemConfig?.label;

      if (labelFormatter) {
        return (
          <div className={cn("font-medium", labelClassName)}>
            {labelFormatter(value, payload)}
          </div>
        );
      }

      if (!value) {
        return null;
      }

      return <div className={cn("font-medium", labelClassName)}>{value}</div>;
    }, [
      label,
      labelFormatter,
      payload,
      hideLabel,
      labelClassName,
      config,
      labelKey,
    ]);

    if (!active || !payload?.length) {
      return null;
    }

    const nestLabel = payload.length === 1 && indicator !== "dot";

    return (
      <div
        ref={ref}
        className={cn(
          "grid min-w-[8rem] items-start gap-1.5 rounded-lg border border-border/50 bg-background px-2.5 py-1.5 text-xs shadow-xl font-sans",
          className
        )}
      >
        {!nestLabel ? tooltipLabel : null}
        <div className="grid gap-1.5">
          {payload.map((item: TooltipPayloadItem, index: number) => {
            const key = `${nameKey || item.name || item.dataKey || "value"}`;
            const itemConfig = getPayloadConfigFromPayload(config, item, key);
            const itemPayload =
              typeof item.payload === "object" && item.payload !== null
                ? (item.payload as Record<string, unknown>)
                : undefined;
            const indicatorColor =
              color || (itemPayload?.fill as string | undefined) || item.color;

            return (
              <div
                key={item.dataKey || index}
                className={cn(
                  "flex w-full flex-wrap items-stretch gap-2 [&>svg]:h-2.5 [&>svg]:w-2.5 [&>svg]:text-muted-foreground",
                  indicator === "dot" && "items-center"
                )}
              >
                {formatter && item?.value !== undefined && item.name ? (
                  formatter(item.value, item.name, item, index, item.payload)
                ) : (
                  <>
                    {itemConfig?.icon ? (
                      <itemConfig.icon />
                    ) : (
                      !hideIndicator && (
                        <div
                          className={cn(
                            "shrink-0 rounded-[2px] border-[--color-border] bg-[--color-bg]",
                            {
                              "h-2.5 w-2.5": indicator === "dot",
                              "w-1": indicator === "line",
                              "w-0 border-1 border-dashed":
                                indicator === "dashed",
                              "my-0.5": nestLabel && indicator === "dashed",
                            }
                          )}
                          style={
                            {
                              "--color-bg": indicatorColor,
                              "--color-border": indicatorColor,
                            } as React.CSSProperties
                          }
                        />
                      )
                    )}
                    <div
                      className={cn(
                        "flex flex-1 justify-between leading-none",
                        nestLabel ? "items-end" : "items-center"
                      )}
                    >
                      <div className="grid gap-1">
                        {nestLabel ? tooltipLabel : null}
                        <span className="text-muted-foreground">
                          {itemConfig?.label || item.name}
                        </span>
                      </div>
                      {item.value !== undefined && (
                        <span className="font-mono font-bold text-foreground ml-2">
                          {item.value.toLocaleString()}
                        </span>
                      )}
                    </div>
                  </>
                )}
              </div>
            );
          })}
        </div>
      </div>
    );
  }
);
ChartTooltipContent.displayName = "ChartTooltipContent";

export const ChartLegend = RechartsPrimitive.Legend;

interface ChartLegendContentProps extends React.ComponentProps<"div"> {
  payload?: TooltipPayloadItem[];
  verticalAlign?: "top" | "bottom" | "middle";
  hideIcon?: boolean;
  nameKey?: string;
}

export const ChartLegendContent = React.forwardRef<
  HTMLDivElement,
  ChartLegendContentProps
>(({ className, hideIcon = false, payload, verticalAlign = "bottom", nameKey }, ref) => {
  const { config } = useChart();

  if (!payload?.length) {
    return null;
  }

  return (
    <div
      ref={ref}
      className={cn(
        "flex items-center justify-center gap-4",
        verticalAlign === "top" ? "pb-3" : "pt-3",
        className
      )}
    >
      {payload.map((item: TooltipPayloadItem, index: number) => {
        const key = `${nameKey || item.dataKey || "value"}`;
        const itemConfig = getPayloadConfigFromPayload(config, item, key);
        const itemKey =
          typeof item.value === "string" || typeof item.value === "number"
            ? item.value
            : String(item.dataKey || index);

        return (
          <div
            key={itemKey}
            className={cn(
              "flex items-center gap-1.5 [&>svg]:h-3 [&>svg]:w-3 [&>svg]:text-muted-foreground"
            )}
          >
            {itemConfig?.icon && !hideIcon ? (
              <itemConfig.icon />
            ) : (
              <div
                className="h-2.5 w-2.5 shrink-0 rounded-[2px]"
                style={{
                  backgroundColor: item.color,
                }}
              />
            )}
            <span className="text-xs font-semibold text-zinc-700">
              {itemConfig?.label ||
                (typeof item.value === "string" || typeof item.value === "number"
                  ? item.value
                  : String(item.value ?? ""))}
            </span>
          </div>
        );
      })}
    </div>
  );
});
ChartLegendContent.displayName = "ChartLegendContent";

function getPayloadConfigFromPayload(
  config: ChartConfig,
  payload: unknown,
  key: string
) {
  if (typeof payload !== "object" || payload === null) {
    return undefined;
  }

  const payloadPayload =
    "payload" in payload &&
    typeof payload.payload === "object" &&
    payload.payload !== null
      ? payload.payload
      : undefined;

  let configLabelKey: string = key;

  if (
    key in payload &&
    typeof payload[key as keyof typeof payload] === "string"
  ) {
    configLabelKey = payload[key as keyof typeof payload] as string;
  } else if (
    payloadPayload &&
    key in payloadPayload &&
    typeof payloadPayload[key as keyof typeof payloadPayload] === "string"
  ) {
    configLabelKey = payloadPayload[
      key as keyof typeof payloadPayload
    ] as string;
  }

  return configLabelKey in config
    ? config[configLabelKey]
    : config[key as keyof typeof config];
}