import type { ComarkPlugin } from "comark";
import type { SearchSource, StoredToolValue } from "./tool-rendering";
import { parseToolValue, readSearchSources } from "./tool-rendering";

export const citationPlugin: ComarkPlugin = {
    name: "source-citations",
    markdownItPlugins: [
        (markdown) => {
            markdown.inline.ruler.before("link", "source_citation", (state, silent) => {
                if (state.linkLevel > 0 || !state.src.startsWith("[[cite:", state.pos)) {
                    return false;
                }
                const match = /^\[\[cite:([a-zA-Z0-9_-]+(?:,[a-zA-Z0-9_-]+)*)\]\]/.exec(state.src.slice(state.pos));
                if (!match) {
                    return false;
                }
                if (silent) {
                    return false;
                }
                const token = state.push("mdc_inline_component", "source-cite", 0);
                token.attrSet("ids", match[1] ?? "");
                state.pos += match[0].length;
                return true;
            });
        },
    ],
};

export const collectCitationSources = (
    parts: readonly { toolCall?: { toolName: string; output?: StoredToolValue } | null }[],
): ReadonlyMap<string, SearchSource> => {
    const sources = new Map<string, SearchSource>();
    for (const part of parts) {
        if (part.toolCall?.toolName !== "search") {
            continue;
        }
        const results = readSearchSources(parseToolValue(part.toolCall.output), { deduplicate: false });
        for (const source of results ?? []) {
            if (source.sourceId) {
                sources.set(source.sourceId, source);
            }
        }
    }
    return sources;
};