/**
 * CommandLinkManager — mounts as a child of <Article> and intercepts
 * clicks on :cmd[] directive spans to send them as journal stream
 * messages.
 *
 * Uses capture-phase event delegation on [data-cmd] spans.
 */

import { Component, onCleanup } from "solid-js";
import { useArticleDom } from "./Article";
import { useJournalStream, sendMessage } from "./stores/journalStream";
import { useJournalCompletions } from "./journal/completions";
import { parseInput } from "./journal/command-parser";
import { resolveRollPayload } from "./journal/types/roll";
import { resolveSparkPayload } from "./journal/types/spark";
import {
  resolveStatRoll,
  resolveTemplateSet,
  canModifyStat,
  fullKey,
  findStatDef,
} from "./journal/stat-helpers";

function unwrap<R>(
  r: { success: true; msg: R } | { success: false; error: string },
) {
  return r.success
    ? ({ ok: true, err: undefined } as const)
    : ({ ok: false, err: r.error } as const);
}

export const CommandLinkManager: Component = () => {
  const contentDom = useArticleDom();
  const stream = useJournalStream();
  const comp = useJournalCompletions();

  // ---- Click interceptor (capture phase) ----

  const onClick = (e: MouseEvent) => {
    const cmdSpan = (e.target as HTMLElement).closest("[data-cmd]");
    if (!cmdSpan) return;

    const command = cmdSpan.getAttribute("data-cmd");
    if (!command) return;

    e.preventDefault();
    e.stopPropagation();
    e.stopImmediatePropagation();
    dispatchCommand(command);
  };

  const dom = contentDom();
  if (dom) {
    dom.addEventListener("click", onClick, true);
  }

  onCleanup(() => {
    const d = contentDom();
    if (d) d.removeEventListener("click", onClick, true);
  });

  // ---- Command dispatch ----

  function dispatchCommand(command: string) {
    // parseInput expects /roll, /spark, etc. — prepend / if missing
    const prefixed = command.startsWith("/") ? command : "/" + command;
    const parsed = parseInput(prefixed);
    if (parsed.error) return;

    if (parsed.type === "roll") {
      const p = resolveRollPayload(
        parsed.payload as { notation: string; label?: string },
      );
      sendMessage("roll", p);
    } else if (parsed.type === "spark") {
      void (async () => {
        try {
          const key = (parsed.payload as { key: string }).key;
          const match = comp.data.sparkTables.find((s) => s.slug === key);
          const csvPath = match?.csvPath ?? "";
          const remix = match?.remix ?? false;
          const p = await resolveSparkPayload({ key, csvPath, remix });
          sendMessage("spark", p);
        } catch {
          // silently ignore spark table errors from directive clicks
        }
      })();
    } else if (parsed.type === "stat") {
      dispatchStat(parsed.payload as Record<string, unknown>);
    } else {
      sendMessage(parsed.type, parsed.payload);
    }
  }

  /** Resolve bare key -> full key. */
  function resolveKey(
    inputKey: string,
    statDefs: typeof comp.data.stats,
    playerName: string,
  ): string {
    if (statDefs.some((d) => fullKey(d, playerName) === inputKey))
      return inputKey;
    const def = statDefs.find((d) => d.key === inputKey);
    if (def) return fullKey(def, playerName);
    return inputKey;
  }

  function dispatchStat(payload: Record<string, unknown>) {
    const p = payload as { action?: string; key?: string; value?: string };

    if (p.action === "roll" && p.key) {
      const resolved = resolveStatRoll(
        p.key,
        comp.data.stats,
        stream.stats,
        stream.myName,
        comp.data.statTemplates,
      );
      if (resolved.error) return;

      const result = sendMessage("stat", {
        action: "set",
        key: resolved.fullKey,
        value: resolved.value,
      });
      if (!unwrap(result).ok) return;

      if (resolved.modifiers) {
        for (const [mk, mv] of Object.entries(resolved.modifiers)) {
          sendMessage("stat", { action: "set", key: mk, value: mv });
        }
      }
      return;
    }

    if (!p.action || !p.key) return;

    const fk = resolveKey(p.key, comp.data.stats, stream.myName);

    if (!canModifyStat(stream.myRole, stream.myName, fk, comp.data.stats)) {
      return;
    }

    sendMessage("stat", { action: p.action, key: fk, value: p.value });

    if (p.action === "set" && p.value) {
      const def = findStatDef(fk, comp.data.stats, stream.myName);
      if (def) {
        const modifiers = resolveTemplateSet(
          def,
          p.value,
          comp.data.stats,
          stream.stats,
          stream.myName,
          comp.data.statTemplates,
        );
        if (modifiers) {
          for (const [mk, mv] of Object.entries(modifiers)) {
            sendMessage("stat", { action: "set", key: mk, value: mv });
          }
        }
      }
    }
  }

  return null;
};

export default CommandLinkManager;