1→import Foundation
     2→
     3→// MARK: - SGS API Models
     4→
     5→struct TimeSeriesValue: Codable, Identifiable {
     6→    var id: String { date }
     7→    let date: String
     8→    let value: String
     9→
    10→    enum CodingKeys: String, CodingKey {
    11→        case date = "data"
    12→        case value = "valor"
    13→    }
    14→
    15→    var numericValue: Double {
    16→        Double(value) ?? 0
    17→    }
    18→
    19→    var parsedDate: Date? {
    20→        let formatter = DateFormatter()
    21→        formatter.dateFormat = "dd/MM/yyyy"
    22→        return formatter.date(from: date)
    23→    }
    24→}
    25→
    26→// MARK: - Series Codes
    27→
    28→enum SeriesCode: Int, CaseIterable, Identifiable {
    29→    case selicDaily = 11
    30→    case selicTarget = 432
    31→    case ipcaMonthly = 433
    32→    case ipca12m = 13522
    33→    case cdi = 4389
    34→    case dollarBuy = 1
    35→    case gdpMonthly = 21619
    36→    case publicDebt = 27574
    37→    case unemployment = 24369
    38→    case industrialProduction = 21859
    39→
    40→    var id: Int { rawValue }
    41→
    42→    var name: String {
    43→        switch self {
    44→        case .selicDaily: return "SELIC Diária"
    45→        case .selicTarget: return "SELIC Meta"
    46→        case .ipcaMonthly: return "IPCA Mensal"
    47→        case .ipca12m: return "IPCA 12 Meses"
    48→        case .cdi: return "CDI"
    49→        case .dollarBuy: return "Dólar (Compra)"
    50→        case .gdpMonthly: return "PIB Mensal"
    51→        case .publicDebt: return "Dívida Pública"
    52→        case .unemployment: return "Desemprego"
    53→        case .industrialProduction: return "Produção Industrial"
    54→        }
    55→    }
    56→
    57→    var shortName: String {
    58→        switch self {
    59→        case .selicDaily: return "SELIC"
    60→        case .selicTarget: return "SELIC"
    61→        case .ipcaMonthly: return "IPCA"
    62→        case .ipca12m: return "IPCA"
    63→        case .cdi: return "CDI"
    64→        case .dollarBuy: return "USD"
    65→        case .gdpMonthly: return "PIB"
    66→        case .publicDebt: return "Dívida"
    67→        case .unemployment: return "Desemp."
    68→        case .industrialProduction: return "Ind."
    69→        }
    70→    }
    71→
    72→    var unit: String {
    73→        switch self {
    74→        case .selicDaily: return "% a.d."
    75→        case .selicTarget, .cdi: return "% a.a."
    76→        case .ipcaMonthly: return "%"
    77→        case .ipca12m: return "% 12m"
    78→        case .dollarBuy: return "R$"
    79→        case .gdpMonthly: return "R$ bi"
    80→        case .publicDebt: return "R$ bi"
    81→        case .unemployment: return "%"
    82→        case .industrialProduction: return "índice"
    83→        }
    84→    }
    85→
    86→    var icon: String {
    87→        switch self {
    88→        case .selicDaily, .selicTarget: return "percent"
    89→        case .ipcaMonthly, .ipca12m: return "chart.line.uptrend.xyaxis"
    90→        case .cdi: return "banknote"
    91→        case .dollarBuy: return "dollarsign.circle"
    92→        case .gdpMonthly: return "chart.bar"
    93→        case .publicDebt: return "building.columns"
    94→        case .unemployment: return "person.crop.circle.badge.minus"
    95→        case .industrialProduction: return "gearshape.2"
    96→        }
    97→    }
    98→
    99→    var color: String {
   100→        switch self {
   101→        case .selicDaily, .selicTarget: return "#8B5CF6"
   102→        case .ipcaMonthly, .ipca12m: return "#F59E0B"
   103→        case .cdi: return "#EC4899"
   104→        case .dollarBuy: return "#10B981"
   105→        case .gdpMonthly: return "#3B82F6"
   106→        case .publicDebt: return "#EF4444"
   107→        case .unemployment: return "#6366F1"
   108→        case .industrialProduction: return "#14B8A6"
   109→        }
   110→    }
   111→
   112→    var category: SeriesCategory {
   113→        switch self {
   114→        case .selicDaily, .selicTarget, .cdi:
   115→            return .interestRates
   116→        case .ipcaMonthly, .ipca12m:
   117→            return .inflation
   118→        case .dollarBuy:
   119→            return .currency
   120→        case .gdpMonthly, .industrialProduction:
   121→            return .economy
   122→        case .publicDebt, .unemployment:
   123→            return .fiscal
   124→        }
   125→    }
   126→}
   127→
   128→enum SeriesCategory: String, CaseIterable {
   129→    case interestRates = "Taxas de Juros"
   130→    case inflation = "Inflação"
   131→    case currency = "Câmbio"
   132→    case economy = "Economia"
   133→    case fiscal = "Fiscal"
   134→}
   135→
   136→// MARK: - Display Model
   137→
   138→struct RateDisplayData: Identifiable {
   139→    let id = UUID()
   140→    let series: SeriesCode
   141→    let currentValue: Double
   142→    let previousValue: Double?
   143→    let lastUpdate: String
   144→    let history: [TimeSeriesValue]
   145→
   146→    var change: Double {
   147→        guard let previous = previousValue else { return 0 }
   148→        return currentValue - previous
   149→    }
   150→
   151→    var changePercent: Double {
   152→        guard let previous = previousValue, previous != 0 else { return 0 }
   153→        return ((currentValue - previous) / previous) * 100
   154→    }
   155→
   156→    var isPositive: Bool {
   157→        change >= 0
   158→    }
   159→
   160→    var formattedValue: String {
   161→        switch series {
   162→        case .selicDaily:
   163→            return String(format: "%.6f%%", currentValue)
   164→        case .selicTarget, .cdi, .ipcaMonthly, .ipca12m, .unemployment:
   165→            return String(format: "%.2f%%", currentValue)
   166→        case .dollarBuy:
   167→            return currentValue.toBRL()
   168→        case .gdpMonthly, .publicDebt:
   169→            return String(format: "%.1f bi", currentValue)
   170→        case .industrialProduction:
   171→            return String(format: "%.2f", currentValue)
   172→        }
   173→    }
   174→
   175→    var formattedChange: String {
   176→        let prefix = change >= 0 ? "↑" : "↓"
   177→        return "\(prefix) \(String(format: "%.2f", abs(changePercent)))%"
   178→    }
   179→}
   180→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>