/**
 * Logging utilities that work well in both local and Gitea Actions environments
 */

import { AsyncLocalStorage } from "node:async_hooks";
import * as core from "@actions/core";
import { isGitHubActions, isInsideDocker } from "./globals.ts";

type LogContext = { prefix: string };

const logContext = new AsyncLocalStorage<LogContext>();

const MAGENTA = "\x1b[35m";
const RESET = "\x1b[0m";

export function withLogPrefix<T>(prefix: string, fn: () => Promise<T>): Promise<T> {
  return logContext.run({ prefix }, fn);
}

function prefixLines(message: string): string {
  const ctx = logContext.getStore();
  if (!ctx) return message;
  const colored = `${MAGENTA}${ctx.prefix}${RESET} `;
  return message
    .split("\n")
    .map((line) => `${colored}${line}`)
    .join("\n");
}

function prefixPlain(name: string): string {
  const ctx = logContext.getStore();
  if (!ctx) return name;
  return `${ctx.prefix} ${name}`;
}

const isRunnerDebugEnabled = () => core.isDebug();
const isLocalDebugEnabled = () =>
  process.env.LOG_LEVEL === "debug" || process.env.ACTIONS_STEP_DEBUG === "true";
const isDebugEnabled = () => isLocalDebugEnabled() || isRunnerDebugEnabled();

function ts(): string {
  return isDebugEnabled() ? `[${new Date().toISOString()}] ` : "";
}

function formatArgs(args: unknown[]): string {
  return args
    .map((arg) => {
      if (typeof arg === "string") return arg;
      if (arg instanceof Error) return `${arg.message}\n${arg.stack}`;
      return JSON.stringify(arg);
    })
    .join(" ");
}

function startGroup(name: string): void {
  const prefixed = prefixPlain(name);
  if (isGitHubActions) {
    core.startGroup(prefixed);
  } else {
    console.group(prefixed);
  }
}

function endGroup(): void {
  if (isGitHubActions) {
    core.endGroup();
  } else {
    console.groupEnd();
  }
}

function group(name: string, fn: () => void): void {
  startGroup(name);
  fn();
  endGroup();
}

function box(text: string, options?: { title?: string; maxWidth?: number }): void {
  const { title, maxWidth = 80 } = options || {};
  const lines = text.trim().split("\n");
  const maxLen = Math.max(...lines.map((l) => l.length));
  const width = Math.min(maxLen + 2, maxWidth);
  const titleLen = title ? ` ${title} `.length : 0;
  const boxWidth = Math.max(width, titleLen);

  let result = "";
  if (title) {
    const padding = Math.max(0, boxWidth - ` ${title} `.length);
    result += `┌ ${title} ${"─".repeat(padding)}┐\n`;
  } else {
    result += `┌${"─".repeat(boxWidth)}┐\n`;
  }
  for (const line of lines) {
    result += `│ ${line.padEnd(boxWidth - 2)} │\n`;
  }
  result += `└${"─".repeat(boxWidth)}┘`;
  core.info(prefixLines(result));
}

function printTable(
  rows: Array<Array<{ data: string; header?: boolean } | string>>
): void {
  const tableData = rows.map((row) =>
    row.map((cell) => (typeof cell === "string" ? cell : cell.data))
  );
  core.info(prefixLines(tableData.map((r) => r.join(" | ")).join("\n")));
}

export async function writeSummary(text: string): Promise<void> {
  if (!isGitHubActions) return;
  if (isInsideDocker) return;
  if (!process.env.GITHUB_STEP_SUMMARY) return;
  await core.summary.addRaw(text).write({ overwrite: true });
}

export const log = {
  info: (...args: unknown[]): void => {
    core.info(prefixLines(`${ts()}${formatArgs(args)}`));
  },
  warning: (...args: unknown[]): void => {
    core.warning(prefixLines(`${ts()}${formatArgs(args)}`));
  },
  error: (...args: unknown[]): void => {
    core.error(prefixLines(`${ts()}${formatArgs(args)}`));
  },
  success: (...args: unknown[]): void => {
    core.info(prefixLines(`${ts()}» ${formatArgs(args)}`));
  },
  debug: (...args: unknown[]): void => {
    if (isRunnerDebugEnabled()) {
      core.debug(prefixLines(formatArgs(args)));
      return;
    }
    if (isLocalDebugEnabled()) {
      core.info(prefixLines(`${ts()}[DEBUG] ${formatArgs(args)}`));
    }
  },
  box,
  table: printTable,
  startGroup,
  endGroup,
  group,
  toolCall: ({ toolName, input }: { toolName: string; input: unknown }): void => {
    const inputFormatted = formatJsonValue(input);
    const output = inputFormatted !== "{}" ? `» ${toolName}(${inputFormatted})` : `» ${toolName}()`;
    log.info(output.trimEnd());
  },
};

export function formatJsonValue(value: unknown): string {
  const compact = JSON.stringify(value);
  return compact.length > 80 || compact.includes("\n") ? JSON.stringify(value, null, 2) : compact;
}

export function formatIndentedField(label: string, content: string): string {
  if (!content.includes("\n")) return `  ${label}: ${content}\n`;
  const lines = content.split("\n");
  let formatted = `  ${label}: ${lines[0]}\n`;
  for (let i = 1; i < lines.length; i++) {
    formatted += `    ${lines[i]}\n`;
  }
  return formatted;
}

export function formatUsageSummary(_entries: unknown[]): string {
  return "";
}