SCP Foundation

/* ------------------------------------------------------------------ */
/*
   EDK++ Compiler Plugin (TypeScript, modular plugin)
   File: plugins/edk_compiler_plugin.ts
*/

export type SourceFragment = {
  id: string;                // Unique id for the source fragment
  language: string;          // like "java", "python", "cpp", "edk++", "pseudocode"
  content: string;           // raw source text
  metadata?: Record<string, any>; // optional metadata (author, timestamp, entropy)
};

export type HybridBytecode = {
  header: {
    version: string;
    compiledAt: string;
    sources: string[]; // list of source ids
  };
  sections: Array<{ name: string; payload: Uint8Array }>;
  annotations: Array<{ key: string; value: any }>;
};

// Some internal types (super simplified)
interface Token { type: string; lexeme: string; position: number }
interface ASTNode { type: string; children?: ASTNode[]; meta?: Record<string, any> }

// Main plugin class
export class EDKCompilerPlugin {
  private entropySeed: number;

  constructor(entropySeed = Date.now() % 0xffffffff) {
    this.entropySeed = entropySeed;
  }

  // Public API: take a bunch of fragments and spit out some hybrid bytecode
  async compile(fragments: SourceFragment[]): Promise<HybridBytecode> {
    // 1) Tokenize everything (yeah, could be parallelized)
    const tokenMaps = new Map<string, Token[]>();
    for (const f of fragments) {
      tokenMaps.set(f.id, this.tokenize(f));
    }

    // 2) Build ASTs per fragment and merge them into one big AST
    const astMap = new Map<string, ASTNode>();
    for (const f of fragments) {
      const tokens = tokenMaps.get(f.id)!;
      const ast = this.parseToAST(tokens, f.language);
      ast.meta = { sourceId: f.id, language: f.language };
      astMap.set(f.id, ast);
    }

    const unifiedAST = this.unifyASTs(Array.from(astMap.values()));

    // 3) Add some quantum/narrative annotations
    this.embedQuantumAnnotations(unifiedAST, fragments);

    // 4) Turn it all into hybrid sections (fake bytecode, really)
    const sections = this.generateHybridSections(unifiedAST);

    // 5) Assemble the final package
    const bytecode: HybridBytecode = {
      header: {
        version: "EDK++-Hybrid-1.0",
        compiledAt: new Date().toISOString(),
        sources: fragments.map((f) => f.id),
      },
      sections,
      annotations: this.extractAnnotations(unifiedAST),
    };

    // 6) Post-processing: sign / obfuscate a bit
    this.postProcess(bytecode);

    return bytecode;
  }

  // --- Step 1: Tokenize stuff ---
  private tokenize(fragment: SourceFragment): Token[] {
    // Super lazy tokenizer: just regex out words, numbers, symbols
    const src = fragment.content;
    const tokens: Token[] = [];
    let pos = 0;

    const re = /([A-Za-z_][A-Za-z0-9_]*)|(\d+\.?\d*)|(==|!=|<=|>=|=>|=|\+|-|\*|\/|\{|\}|\(|\)|\[|\]|;|:|,)|("[^"]*"|'[^']*')/g;
    let m: RegExpExecArray | null;
    while ((m = re.exec(src)) !== null) {
      const lexeme = m[0];
      const type = this.classifyLexeme(lexeme);
      tokens.push({ type, lexeme, position: pos++ });
    }

    // Drop in some quantum markers if the fragment is flagged
    if (src.includes("<QUANTA>") || fragment.language === "edk++") {
      tokens.push({ type: "QUANTA_MARKER", lexeme: "<QUANTA>", position: pos++ });
    }

    return tokens;
  }

  private classifyLexeme(lex: string): string {
    if (/^\d/.test(lex)) return "NUMBER";
    if (/^["']/.test(lex)) return "STRING";
    if (/^(if|else|for|while|function|class|return|import|module)$/i.test(lex)) return "KEYWORD";
    if (/^(==|!=|<=|>=|=>|=|\+|-|\*|\/)$.test(lex)) return "OPERATOR";
    if (/^[{}()\[\];,:]$/.test(lex)) return "PUNCT";
    return "IDENT";
  }

  // --- Step 2: Turn tokens into an AST ---
  private parseToAST(tokens: Token[], language: string): ASTNode {
    // Placeholder parser: just wrap tokens into nodes
    const root: ASTNode = { type: "Module", children: [] };
    for (const t of tokens) {
      root.children!.push({ type: "Token", meta: { token: t } });
    }

    // Add some quick semantic labels (like function/class defs)
    this.detectSimpleSemantics(root, language);
    return root;
  }

  private detectSimpleSemantics(ast: ASTNode, language: string) {
    for (const child of ast.children || []) {
      const tok: Token | undefined = child.meta?.token;
      if (!tok) continue;
      if (tok.type === "KEYWORD" && /function|def|class/i.test(tok.lexeme)) {
        child.type = "Decl";
        child.meta.semantic = { declType: tok.lexeme };
      }
    }
  }

  // --- Step 2b: Merge ASTs together ---
  private unifyASTs(asts: ASTNode[]): ASTNode {
    const unified: ASTNode = { type: "UnifiedModule", children: [] };
    for (const ast of asts) {
      unified.children!.push({ type: "SourceBlock", children: [ast], meta: ast.meta });
    }

    // Tidy up duplicate identifiers
    this.resolveSymbolConflicts(unified);

    return unified;
  }

  private resolveSymbolConflicts(unified: ASTNode) {
    const seen = new Map<string, number>();
    for (const block of unified.children || []) {
      const srcId = block.meta?.sourceId || "unknown";
      for (const node of (block.children?.[0].children || [])) {
        const tok: Token | undefined = node.meta?.token;
        if (!tok) continue;
        if (tok.type === "IDENT") {
          const name = tok.lexeme;
          const key = `${name}`;
          const count = seen.get(key) || 0;
          if (count > 0) {
            node.meta.renamed = `${name}__${count}`;
          }
          seen.set(key, count + 1);
        }
      }
    }
  }

  // --- Step 3: Sprinkle in quantum annotations ---
  private embedQuantumAnnotations(unified: ASTNode, fragments: SourceFragment[]) {
    const densityMap = this.estimateNarrativeDensity(unified);

    unified.meta = unified.meta || {};
    unified.meta.quantumAnnotations = {
      seed: this.entropySeed,
      densityMap,
      note: "Annotations dropped in by EDKCompilerPlugin",
    };

    unified.meta.highRiskRegions = Object.keys(densityMap).filter(k => densityMap[k] > 0.8);
  }

  private estimateNarrativeDensity(unified: ASTNode): Record<string, number> {
    const map: Record<string, number> = {};
    for (const block of unified.children || []) {
      const id = block.meta?.sourceId || "unknown";
      let score = 0;
      for (const node of (block.children?.[0].children || [])) {
        const tok: Token | undefined = node.meta?.token;
        if (!tok) continue;
        if (tok.type === "KEYWORD") score += 0.03;
        if (tok.type === "QUANTA_MARKER") score += 0.5;
        if (tok.type === "STRING") score += 0.01 * Math.min(10, tok.lexeme.length);
      }
      map[id] = Math.min(1, score);
    }
    return map;
  }

  // --- Step 4: Build hybrid bytecode sections ---
  private generateHybridSections(unified: ASTNode): Array<{ name: string; payload: Uint8Array }> {
    const sections: Array<{ name: string; payload: Uint8Array }> = [];

    const narrativeRules = this.emitNarrativeRules(unified);
    sections.push({ name: "narrative_rules", payload: narrativeRules });

    const compatibility = this.emitCompatibilityLayer(unified);
    sections.push({ name: "compat_layer", payload: compatibility });

    const metaPayload = this.serializeJSON({ meta: unified.meta });
    sections.push({ name: "annotations", payload: metaPayload });

    return sections;
  }

  private emitNarrativeRules(unified: ASTNode): Uint8Array {
    const rules = [] as any[];
    for (const block of unified.children || []) {
      const src = block.meta?.sourceId || "unknown";
      const risk = (block.meta?.sourceId && unified.meta?.highRiskRegions?.includes(src)) ? "HIGH" : "NORMAL";
      rules.push({ source: src, rule: `enforce_coherence(${src})`, risk });
    }
    return this.serializeJSON(rules);
  }

  private emitCompatibilityLayer(unified: ASTNode): Uint8Array {
    const stub = {
      version: 1,
      adaptors: ["java->hybrid", "python->hybrid", "cpp->hybrid", "edk++->hybrid"],
      entropy: this.entropySeed,
    };
    return this.serializeJSON(stub);
  }

  // --- Helpers ---
  private serializeJSON(obj: any): Uint8Array {
    const s = JSON.stringify(obj, null, 2);
    const encoder = new TextEncoder();
    return encoder.encode(s);
  }

  private extractAnnotations(unified: ASTNode): Array<{ key: string; value: any }> {
    const meta = unified.meta || {};
    const annotations = [] as Array<{ key: string; value: any }>;
    if (meta.quantumAnnotations) annotations.push({ key: "quantum", value: meta.quantumAnnotations });
    if (meta.highRiskRegions) annotations.push({ key: "highRisk", value: meta.highRiskRegions });
    return annotations;
  }

  private postProcess(bytecode: HybridBytecode) {
    // Quick fake signing and obfuscation: just slap a hash on and rotate some bytes
    const hash = this.fauxHash(bytecode.header.sources.join(",") + bytecode.header.compiledAt);
    bytecode.header.version += `+signed-${hash.slice(0, 8)}`;

    for (let i = 0; i < bytecode.sections.length; i++) {
      const payload = bytecode.sections[i].payload;
      const rot = (this.entropySeed + i) % Math.max(1, payload.length);
      bytecode.sections[i].payload = this.rotateUint8Array(payload, rot);
    }
  }

  private fauxHash(s: string): string {
    // quick and dirty hash, nothing secure
    let h = 2166136261 >>> 0;
    for (let i = 0; i < s.length; i++) {
      h ^= s.charCodeAt(i);
      h = Math.imul(h, 16777619) >>> 0;
    }
    return (h >>> 0).toString(16);
  }

  private rotateUint8Array(arr: Uint8Array, n: number): Uint8Array {
    if (arr.length === 0) return arr;
    const r = new Uint8Array(arr.length);
    for (let i = 0; i < arr.length; i++) r[i] = arr[(i + n) % arr.length];
    return r;
  }
}

// Default export for plugin runtime integration
export default EDKCompilerPlugin