#!/usr/bin/env npx tsx
/**
 * Seed external source claims to StemeDB.
 *
 * This script:
 * 1. Loads external sources from data/external-sources.json
 * 2. Creates agents with varying trust levels
 * 3. Registers sources and submits assertions to StemeDB
 * 4. Ensures curated conflicts are created for demo purposes
 *
 * Usage:
 *   npx tsx scripts/seed-external.ts
 *   npx tsx scripts/seed-external.ts --dry-run
 *
 * Environment:
 *   STEMEDB_API_URL - API base URL (default: http://127.0.0.1:18180)
 */

import * as ed from "@noble/ed25519";
import { sha512 } from "@noble/hashes/sha512";
import { readFileSync } from "fs";
import { join } from "path";

// Configure ed25519 to use sha512
ed.etc.sha512Sync = (...m) => sha512(ed.etc.concatBytes(...m));

const API_URL = process.env.STEMEDB_API_URL || "http://127.0.0.1:18180";

// ============================================================================
// Types
// ============================================================================

interface Agent {
  name: string;
  privateKey: Uint8Array;
  publicKey: Uint8Array;
}

type ObjectType = "Text" | "Number" | "Boolean" | "Reference";

interface ObjectValue {
  type: ObjectType;
  value: string | number | boolean;
}

interface ExternalClaim {
  subject: string;
  predicate: string;
  object: ObjectValue;
  confidence: number;
  note?: string;
}

interface ExternalSource {
  id: string;
  label: string;
  url: string;
  tier: number;
  tierLabel: string;
  category: string;
  claims: ExternalClaim[];
}

interface CuratedConflict {
  id: string;
  subject: string;
  predicate: string;
  description: string;
  sources: string[];
  values: Array<{
    source: string;
    value: string;
    interpretation: string;
  }>;
  demoNote: string;
}

interface ExternalSourcesData {
  sources: ExternalSource[];
  curatedConflicts: CuratedConflict[];
}

// ============================================================================
// Helpers
// ============================================================================

function toHex(bytes: Uint8Array): string {
  return Array.from(bytes)
    .map((b) => b.toString(16).padStart(2, "0"))
    .join("");
}

function sha256(data: string): Uint8Array {
  const encoder = new TextEncoder();
  const bytes = encoder.encode(data);
  const hash = new Uint8Array(32);
  for (let i = 0; i < bytes.length; i++) {
    hash[i % 32] ^= bytes[i];
    hash[(i + 1) % 32] = (hash[(i + 1) % 32] + bytes[i]) % 256;
  }
  return hash;
}

function generateSourceHash(sourceId: string): string {
  return toHex(sha256(`external-source-${sourceId}`));
}

async function createAgent(name: string, seed: string): Promise<Agent> {
  const seedHash = sha256(`external-seed-agent-${name}-${seed}`);
  const privateKey = seedHash;
  const publicKey = await ed.getPublicKeyAsync(privateKey);
  return { name, privateKey, publicKey };
}

async function signAssertion(
  agent: Agent,
  subject: string,
  predicate: string
): Promise<{ signature: string; timestamp: number }> {
  const timestamp = Math.floor(Date.now() / 1000);
  const message = `${subject}:${predicate}`;
  const messageBytes = new TextEncoder().encode(message);
  const signature = await ed.signAsync(messageBytes, agent.privateKey);
  return { signature: toHex(signature), timestamp };
}

// ============================================================================
// API Functions
// ============================================================================

async function registerSource(
  hash: string,
  label: string,
  tier: number,
  tierLabel: string,
  url?: string
): Promise<void> {
  const response = await fetch(`${API_URL}/v1/sources`, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({
      hash,
      label,
      tier,
      tier_label: tierLabel,
      url,
    }),
  });

  if (!response.ok && response.status !== 409) {
    const text = await response.text();
    console.warn(`  Warning: Failed to register source ${label}: ${text}`);
  }
}

async function createAssertion(
  agent: Agent,
  subject: string,
  predicate: string,
  object: ObjectValue,
  confidence: number,
  sourceHash: string,
  sourceClass: string
): Promise<string | null> {
  const { signature, timestamp } = await signAssertion(agent, subject, predicate);

  const request = {
    subject,
    predicate,
    object,
    confidence,
    source_hash: sourceHash,
    source_class: sourceClass,
    signatures: [
      {
        agent_id: toHex(agent.publicKey),
        signature,
        timestamp,
        version: 1,
      },
    ],
  };

  const response = await fetch(`${API_URL}/v1/assert`, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(request),
  });

  if (!response.ok) {
    const text = await response.text();
    console.warn(`  Warning: Failed to create assertion: ${text}`);
    return null;
  }

  const data = await response.json();
  return data.hash;
}

// ============================================================================
// Agent Pool
// ============================================================================

interface AgentPool {
  regulatory: Agent;
  clinical: Agent;
  observational: Agent;
  expert: Agent;
  community: Agent;
}

async function createAgentPool(): Promise<AgentPool> {
  return {
    regulatory: await createAgent("regulatory_authority", "reg-001"),
    clinical: await createAgent("clinical_researcher", "clin-002"),
    observational: await createAgent("observational_analyst", "obs-003"),
    expert: await createAgent("domain_expert", "exp-004"),
    community: await createAgent("community_contributor", "comm-005"),
  };
}

function getAgentForTier(pool: AgentPool, tier: number): Agent {
  switch (tier) {
    case 0:
      return pool.regulatory;
    case 1:
      return pool.clinical;
    case 2:
      return pool.observational;
    case 3:
      return pool.expert;
    case 4:
    case 5:
      return pool.community;
    default:
      return pool.expert;
  }
}

// ============================================================================
// Main
// ============================================================================

async function main(): Promise<void> {
  const args = process.argv.slice(2);
  const dryRun = args.includes("--dry-run") || args.includes("-d");

  console.log("StemeDB External Sources Seed Script");
  console.log("====================================\n");

  if (dryRun) {
    console.log("DRY RUN MODE - No data will be submitted\n");
  }

  // Load external sources data
  const dataPath = join(process.cwd(), "data", "external-sources.json");
  const data: ExternalSourcesData = JSON.parse(readFileSync(dataPath, "utf-8"));

  console.log(`Loaded ${data.sources.length} external sources`);
  console.log(`Loaded ${data.curatedConflicts.length} curated conflicts\n`);

  // Create agent pool
  console.log("Creating agent pool...");
  const agents = await createAgentPool();
  console.log(`  regulatory: ${toHex(agents.regulatory.publicKey).slice(0, 16)}...`);
  console.log(`  clinical:   ${toHex(agents.clinical.publicKey).slice(0, 16)}...`);
  console.log(`  observational: ${toHex(agents.observational.publicKey).slice(0, 16)}...`);
  console.log(`  expert:     ${toHex(agents.expert.publicKey).slice(0, 16)}...`);
  console.log(`  community:  ${toHex(agents.community.publicKey).slice(0, 16)}...`);
  console.log();

  // Register all sources
  console.log("Registering sources...");
  for (const source of data.sources) {
    const hash = generateSourceHash(source.id);

    if (dryRun) {
      console.log(`  [DRY] Would register: ${source.label.slice(0, 50)}...`);
    } else {
      await registerSource(hash, source.label, source.tier, source.tierLabel, source.url);
      console.log(`  + T${source.tier} ${source.label.slice(0, 50)}...`);
    }
  }
  console.log();

  // Create assertions from all sources
  console.log("Creating assertions from external sources...");
  let totalCreated = 0;
  let totalFailed = 0;

  for (const source of data.sources) {
    const sourceHash = generateSourceHash(source.id);
    const agent = getAgentForTier(agents, source.tier);

    console.log(`\n  ${source.label}:`);

    for (const claim of source.claims) {
      if (dryRun) {
        console.log(
          `    [DRY] ${claim.subject}/${claim.predicate} = "${String(claim.object.value).slice(0, 25)}..."`
        );
        totalCreated++;
      } else {
        const hash = await createAssertion(
          agent,
          claim.subject,
          claim.predicate,
          claim.object,
          claim.confidence,
          sourceHash,
          source.tierLabel
        );

        if (hash) {
          totalCreated++;
          console.log(`    + ${claim.subject}/${claim.predicate} -> ${hash.slice(0, 12)}...`);
        } else {
          totalFailed++;
        }
      }
    }
  }

  console.log(`\nCreated ${totalCreated} assertions${totalFailed > 0 ? ` (${totalFailed} failed)` : ""}`);

  // Log curated conflicts for reference
  console.log("\n--- Curated Conflicts for Demo ---");
  for (const conflict of data.curatedConflicts) {
    console.log(`\n  ${conflict.id}:`);
    console.log(`    Subject: ${conflict.subject}/${conflict.predicate}`);
    console.log(`    ${conflict.description}`);
    console.log(`    Demo note: ${conflict.demoNote.slice(0, 60)}...`);
  }

  if (!dryRun) {
    // Wait for materialization
    console.log("\nWaiting for materialization...");
    await new Promise((resolve) => setTimeout(resolve, 2000));
    console.log("Done!");
  }
}

main().catch((error) => {
  console.error("Error:", error.message);
  process.exit(1);
});