//
//  StatisticsModels.swift
//  suixinkan
//

import Foundation

/// 数据统计汇总响应，对齐 Android `StatisticsResponse`。
struct StatisticsSummaryResponse: Decodable, Equatable {
    let orderAmountSum: String
    let orderCount: Int
    let orderPriceAvg: String
    let receivedAmountSum: String
    let refundAmountSum: String

    enum CodingKeys: String, CodingKey {
        case orderAmountSum = "order_amount_sum"
        case orderCount = "order_count"
        case orderPriceAvg = "order_price_avg"
        case receivedAmountSum = "received_amount_sum"
        case refundAmountSum = "refund_amount_sum"
    }

    init(
        orderAmountSum: String = "",
        orderCount: Int = 0,
        orderPriceAvg: String = "",
        receivedAmountSum: String = "",
        refundAmountSum: String = ""
    ) {
        self.orderAmountSum = orderAmountSum
        self.orderCount = orderCount
        self.orderPriceAvg = orderPriceAvg
        self.receivedAmountSum = receivedAmountSum
        self.refundAmountSum = refundAmountSum
    }

    init(from decoder: Decoder) throws {
        let container = try decoder.container(keyedBy: CodingKeys.self)
        orderAmountSum = try container.decodeIfPresent(String.self, forKey: .orderAmountSum) ?? ""
        orderCount = try container.decodeIfPresent(Int.self, forKey: .orderCount) ?? 0
        orderPriceAvg = try container.decodeIfPresent(String.self, forKey: .orderPriceAvg) ?? ""
        receivedAmountSum = try container.decodeIfPresent(String.self, forKey: .receivedAmountSum) ?? ""
        refundAmountSum = Self.decodeAmountString(from: container, forKey: .refundAmountSum)
    }

    private static func decodeAmountString(
        from container: KeyedDecodingContainer<CodingKeys>,
        forKey key: CodingKeys
    ) -> String {
        if let value = try? container.decode(String.self, forKey: key) {
            return value
        }
        if let value = try? container.decode(Double.self, forKey: key) {
            return String(value)
        }
        if let value = try? container.decode(Int.self, forKey: key) {
            return String(value)
        }
        return ""
    }
}

/// 数据统计日明细行，对齐 Android `StatisticsPageEntity`。
struct StatisticsDailyItem: Decodable, Hashable {
    let date: String
    let orderCount: Int
    let orderPrice: String
    let refund: String
    let received: String

    enum CodingKeys: String, CodingKey {
        case date
        case orderCount = "order_count"
        case orderPrice = "order_price"
        case refund
        case received
    }

    init(
        date: String = "",
        orderCount: Int = 0,
        orderPrice: String = "",
        refund: String = "",
        received: String = ""
    ) {
        self.date = date
        self.orderCount = orderCount
        self.orderPrice = orderPrice
        self.refund = refund
        self.received = received
    }
}

/// 分页列表响应，对齐 Android `ListDataResponse`。
struct ListDataResponse<T: Decodable>: Decodable {
    let total: Int
    let data: [T]

    init(total: Int = 0, data: [T] = []) {
        self.total = total
        self.data = data
    }
}

/// 汇总区周期选项，对齐 Android 顶部 chip。
enum StatisticsSummaryPeriod: String, CaseIterable {
    case today = "今日"
    case yesterday = "昨日"
    case last7Days = "7日"
    case thisMonth = "本月"

    /// 汇总 API 的 `range` 参数值。
    var rangeValue: String {
        switch self {
        case .today: "1"
        case .yesterday: "2"
        case .last7Days: "3"
        case .thisMonth: "4"
        }
    }

    static func fromDisplayName(_ name: String) -> StatisticsSummaryPeriod? {
        StatisticsSummaryPeriod(rawValue: name)
    }
}

/// 列表区日期快捷选项，对齐 Android `DateRangeBottomSheet` 快捷按钮。
enum StatisticsRangeShortcut: String, CaseIterable {
    case today = "今日"
    case yesterday = "昨日"
    case last7Days = "7日"
    case all = "全部"
}