import Foundation

// MARK: - String helpers for display purposes

extension String {
    /// Strips trailing relative-date suffixes (e.g. "2 years ago", "3 days ago")
    /// that may be embedded in chapter titles coming from older scraped records.
    func strippingTrailingDate() -> String {
        let units = ["second", "minute", "hour", "day", "week", "month", "year"]
        let lower = self.lowercased()
        for unit in units {
            for suffix in [unit + "s ago", unit + " ago"] {
                guard let suffixRange = lower.range(of: suffix, options: .backwards) else { continue }
                // Walk backwards past whitespace to find the numeric token
                let before = String(self[self.startIndex ..< suffixRange.lowerBound])
                let trimmed = before.trimmingCharacters(in: .whitespaces)
                // Find start of last word (should be a number)
                if let spaceIdx = trimmed.lastIndex(of: " ") {
                    let potentialNum = String(trimmed[trimmed.index(after: spaceIdx)...])
                    if Int(potentialNum) != nil {
                        return String(trimmed[trimmed.startIndex ..< spaceIdx])
                            .trimmingCharacters(in: .whitespaces)
                    }
                } else if Int(trimmed) != nil {
                    // The entire string is just a number + "ago"
                    return ""
                }
            }
        }
        return self
    }
}

// MARK: - App-wide layout constants

enum AppLayout {
    /// Height of the persistent mini-player bar:
    /// 12pt vertical padding (top) + 56pt cover height + 12pt vertical padding (bottom) + 12pt horizontal margin.
    static let miniPlayerBarHeight: CGFloat = 92
}