/**
 * Output formatting for mem0 CLI — text, JSON, table, quiet modes.
 */

import Table from "cli-table3";
import boxen from "boxen";
import { colors, sym } from "./branding.js";

const { brand, accent, success, error: errorColor, dim } = colors;

function formatDate(dtStr?: string): string | undefined {
  if (!dtStr) return undefined;
  try {
    const dt = new Date(dtStr.replace("Z", "+00:00"));
    return dt.toISOString().slice(0, 10);
  } catch {
    return dtStr?.slice(0, 10);
  }
}

export function formatMemoriesText(
  memories: Record<string, unknown>[],
  title = "memories",
): void {
  const count = memories.length;
  console.log(`\n${brand(`Found ${count} ${title}:`)}\n`);

  for (let i = 0; i < memories.length; i++) {
    const mem = memories[i];
    const memoryText = (mem.memory ?? mem.text ?? "") as string;
    const memId = ((mem.id as string) ?? "").slice(0, 8);
    const score = mem.score as number | undefined;
    const created = formatDate(mem.created_at as string | undefined);
    let category: string | undefined;
    const cats = mem.categories;
    if (Array.isArray(cats)) {
      category = cats[0] as string | undefined;
    }

    console.log(`  ${i + 1}. ${memoryText}`);

    const details: string[] = [];
    if (score !== undefined) details.push(`Score: ${score.toFixed(2)}`);
    if (memId) details.push(`ID: ${memId}`);
    if (created) details.push(`Created: ${created}`);
    if (category) details.push(`Category: ${category}`);

    if (details.length > 0) {
      console.log(`     ${dim(details.join(" · "))}`);
    }
    console.log();
  }
}

export function formatMemoriesTable(memories: Record<string, unknown>[]): void {
  const table = new Table({
    head: [accent("ID"), accent("Memory"), accent("Category"), accent("Created")],
    colWidths: [12, 52, 16, 14],
    wordWrap: true,
    style: { head: [], border: [] },
  });

  for (const mem of memories) {
    const memId = ((mem.id as string) ?? "").slice(0, 8);
    let memoryText = (mem.memory ?? mem.text ?? "") as string;
    if (memoryText.length > 60) {
      memoryText = memoryText.slice(0, 57) + "...";
    }
    const categories = mem.categories;
    const cat =
      Array.isArray(categories) && categories.length > 0
        ? (categories[0] as string)
        : "—";
    const created = formatDate(mem.created_at as string | undefined) ?? "—";
    table.push([dim(memId), memoryText, cat, created]);
  }

  console.log();
  console.log(table.toString());
  console.log();
}

export function formatJson(data: unknown): void {
  console.log(JSON.stringify(data, null, 2));
}

export function formatSingleMemory(
  mem: Record<string, unknown>,
  output = "text",
): void {
  if (output === "json") {
    formatJson(mem);
    return;
  }

  const memoryText = (mem.memory ?? mem.text ?? "") as string;
  const memId = (mem.id ?? "") as string;

  const lines: string[] = [];
  lines.push(`  ${memoryText}`);
  lines.push("");

  if (memId) lines.push(`  ${dim("ID:")}         ${memId}`);
  const created = formatDate(mem.created_at as string | undefined);
  if (created) lines.push(`  ${dim("Created:")}    ${created}`);
  const updated = formatDate(mem.updated_at as string | undefined);
  if (updated) lines.push(`  ${dim("Updated:")}    ${updated}`);
  const meta = mem.metadata;
  if (meta) lines.push(`  ${dim("Metadata:")}   ${JSON.stringify(meta)}`);
  const categories = mem.categories;
  if (categories) {
    const catStr = Array.isArray(categories) ? categories.join(", ") : String(categories);
    lines.push(`  ${dim("Categories:")} ${catStr}`);
  }

  const content = lines.join("\n");
  console.log();
  console.log(
    boxen(content, {
      title: brand("Memory"),
      titleAlignment: "left",
      borderColor: "magenta",
      padding: 1,
    }),
  );
  console.log();
}

export function formatAddResult(
  result: Record<string, unknown> | Record<string, unknown>[],
  output = "text",
): void {
  if (output === "json") {
    formatJson(result);
    return;
  }
  if (output === "quiet") return;

  const results: Record<string, unknown>[] = Array.isArray(result)
    ? result
    : ((result.results as Record<string, unknown>[]) ?? [result]);

  if (!results.length) {
    console.log(`  ${dim("No memories extracted.")}`);
    return;
  }

  console.log();
  for (const r of results) {
    // Detect async PENDING response
    if (r.status === "PENDING") {
      const eventId = ((r.event_id as string) ?? "").slice(0, 8);
      const icon = accent(sym("⧗", "..."));
      const parts = [`  ${icon} ${dim("Queued".padEnd(10))}`, "Processing in background"];
      if (eventId) parts.push(dim(`(event ${eventId})`));
      console.log(parts.join("  "));
      continue;
    }

    const event = (r.event ?? "ADD") as string;
    const memory = (r.memory ?? r.text ?? r.content ?? r.data ?? "") as string;
    const memId = ((r.id as string) ?? (r.memory_id as string) ?? "").slice(0, 8);

    let icon: string;
    let label: string;
    if (event === "ADD") {
      icon = success("+");
      label = "Added";
    } else if (event === "UPDATE") {
      icon = accent("~");
      label = "Updated";
    } else if (event === "DELETE") {
      icon = errorColor("-");
      label = "Deleted";
    } else if (event === "NOOP") {
      icon = dim("·");
      label = "No change";
    } else {
      icon = dim("?");
      label = event;
    }

    const parts = [`  ${icon} ${dim(label.padEnd(10))}`];
    if (memory) parts.push(memory);
    if (memId) parts.push(dim(`(${memId})`));
    console.log(parts.join("  "));
  }
  console.log();
}

export function formatJsonEnvelope(opts: {
  command: string;
  data: unknown;
  durationMs?: number;
  scope?: Record<string, string | undefined>;
  count?: number;
  status?: string;
  error?: string;
}): void {
  const envelope: Record<string, unknown> = {
    status: opts.status ?? "success",
    command: opts.command,
  };
  if (opts.durationMs !== undefined) envelope.duration_ms = opts.durationMs;
  if (opts.scope !== undefined) envelope.scope = opts.scope;
  if (opts.count !== undefined) envelope.count = opts.count;
  if (opts.error) envelope.error = opts.error;
  envelope.data = opts.data;
  console.log(JSON.stringify(envelope, null, 2));
}

export function printResultSummary(opts: {
  count: number;
  durationSecs?: number;
  page?: number;
  scopeIds?: Record<string, string | undefined>;
}): void {
  const parts = [`${opts.count} result${opts.count !== 1 ? "s" : ""}`];
  if (opts.page !== undefined) parts.push(`page ${opts.page}`);
  if (opts.scopeIds) {
    const scopeParts = Object.entries(opts.scopeIds)
      .filter(([, v]) => v)
      .map(([k, v]) => `${k.replace(/_/g, " ")}=${v}`);
    if (scopeParts.length > 0) parts.push(scopeParts.join(", "));
  }
  if (opts.durationSecs !== undefined) parts.push(`${opts.durationSecs.toFixed(2)}s`);

  console.log(`  ${dim(parts.join(" · "))}`);
  console.log();
}