/**
 * Format ISO date string to countdown format
 * @param {string|Date} date - ISO date string or Date object
 * @returns {string} Formatted countdown (e.g., "5d 12h", "2h 30m", "15m") or "-"
 */
export function formatResetTime(date) {
  if (!date) return "-";

  try {
    const resetDate = typeof date === "string" ? new Date(date) : date;
    const now = new Date();
    const diffMs = resetDate - now;

    if (diffMs <= 0) return "-";

    const totalMinutes = Math.floor(diffMs / (1000 * 60));
    const totalHours = Math.floor(totalMinutes / 60);
    const totalDays = Math.floor(totalHours / 24);

    const days = totalDays;
    const hours = totalHours % 24;
    const minutes = totalMinutes % 60;

    if (days > 0) {
      return `${days}d ${hours}h`;
    }

    if (hours > 0) {
      return `${hours}h ${minutes}m`;
    }

    return `${minutes}m`;
  } catch (error) {
    return "-";
  }
}

/**
 * Get Tailwind color class based on percentage
 * @param {number} percentage - Remaining percentage (0-100)
 * @returns {string} Color name: "green" | "yellow" | "red" | "gray"
 */
export function getStatusColor(percentage) {
  if (percentage === 0 || percentage === null || percentage === undefined) {
    return "gray";
  }

  if (percentage > 70) return "green";
  if (percentage >= 30) return "yellow";
  return "red";
}

/**
 * Get status emoji based on percentage
 * @param {number} percentage - Remaining percentage (0-100)
 * @returns {string} Emoji: "🟢" | "🟡" | "🔴" | "⚫"
 */
export function getStatusEmoji(percentage) {
  if (percentage === 0 || percentage === null || percentage === undefined) {
    return "⚫";
  }

  if (percentage > 70) return "🟢";
  if (percentage >= 30) return "🟡";
  return "🔴";
}

/**
 * Calculate remaining percentage
 * @param {number} used - Used amount
 * @param {number} total - Total amount
 * @returns {number} Remaining percentage (0-100)
 */
export function calculatePercentage(used, total) {
  if (!total || total === 0) return 0;
  if (!used || used < 0) return 100;
  if (used >= total) return 0;

  return Math.round(((total - used) / total) * 100);
}

/**
 * Parse provider-specific quota structures into normalized array
 * @param {string} provider - Provider name (github, antigravity, codex, kiro, claude)
 * @param {Object} data - Raw quota data from provider
 * @returns {Array<Object>} Normalized quota objects with { name, used, total, resetAt }
 */
export function parseQuotaData(provider, data) {
  if (!data || typeof data !== "object") return [];

  const normalizedQuotas = [];

  try {
    switch (provider.toLowerCase()) {
      case "github":
        if (data.quotas) {
          Object.entries(data.quotas).forEach(([name, quota]) => {
            normalizedQuotas.push({
              name,
              used: quota.used || 0,
              total: quota.total || 0,
              resetAt: quota.resetAt || null,
            });
          });
        }
        break;

      case "antigravity":
        if (data.quotas) {
          Object.entries(data.quotas).forEach(([modelName, quota]) => {
            normalizedQuotas.push({
              name: modelName,
              used: quota.used || 0,
              total: quota.total || 0,
              resetAt: quota.resetAt || null,
            });
          });
        }
        break;

      case "codex":
        if (data.quotas) {
          Object.entries(data.quotas).forEach(([quotaType, quota]) => {
            normalizedQuotas.push({
              name: quotaType,
              used: quota.used || 0,
              total: quota.total || 0,
              resetAt: quota.resetAt || null,
            });
          });
        }
        break;

      case "kiro":
        if (data.quotas) {
          Object.entries(data.quotas).forEach(([quotaType, quota]) => {
            normalizedQuotas.push({
              name: quotaType,
              used: quota.used || 0,
              total: quota.total || 0,
              resetAt: quota.resetAt || null,
            });
          });
        }
        break;

      case "claude":
        if (data.message) {
          // Handle error message case
          normalizedQuotas.push({
            name: "error",
            used: 0,
            total: 0,
            resetAt: null,
            message: data.message,
          });
        } else if (data.quotas) {
          Object.entries(data.quotas).forEach(([name, quota]) => {
            normalizedQuotas.push({
              name,
              used: quota.used || 0,
              total: quota.total || 0,
              resetAt: quota.resetAt || null,
            });
          });
        }
        break;

      default:
        // Generic fallback for unknown providers
        if (data.quotas) {
          Object.entries(data.quotas).forEach(([name, quota]) => {
            normalizedQuotas.push({
              name,
              used: quota.used || 0,
              total: quota.total || 0,
              resetAt: quota.resetAt || null,
            });
          });
        }
    }
  } catch (error) {
    console.error(`Error parsing quota data for ${provider}:`, error);
    return [];
  }

  return normalizedQuotas;
}