import Foundation

// Entspricht den Schemas des Backends (backend/app/schemas.py).

struct TokenResponse: Codable {
    let accessToken: String
    let role: String
    let username: String

    enum CodingKeys: String, CodingKey {
        case accessToken = "access_token"
        case role, username
    }
}

struct MeResponse: Codable {
    let id: Int
    let username: String
    let role: String

    var isAdmin: Bool { role == "admin" }
}

struct Unit: Codable, Identifiable, Hashable {
    let id: Int
    let name: String
    let kind: String
    let factor: Double
}

struct BarcodeEntry: Codable, Identifiable, Hashable {
    let id: Int
    let code: String
    let note: String?
}

struct Product: Codable, Identifiable, Hashable {
    let id: Int
    let barcode: String?
    let name: String
    let brand: String?
    let imageUrl: String?
    let baseUnit: String
    let packageSize: Double?
    let packageLabel: String?
    let groupId: Int?
    let minStock: Double?
    let stock: Double
    let expiredCount: Int
    let kind: String
    let unitName: String
    let unitFactor: Double
    let barcodes: [BarcodeEntry]

    enum CodingKeys: String, CodingKey {
        case id, barcode, name, brand, stock, kind, barcodes
        case imageUrl = "image_url"
        case baseUnit = "base_unit"
        case packageSize = "package_size"
        case packageLabel = "package_label"
        case groupId = "group_id"
        case minStock = "min_stock"
        case expiredCount = "expired_count"
        case unitName = "unit_name"
        case unitFactor = "unit_factor"
    }

    /// Bezeichnung der Artikeleinheit (Gebinde, sonst Produkteinheit).
    var articleUnitLabel: String {
        if let size = packageSize, size > 0 { return packageLabel ?? "Packung" }
        return unitName
    }

    /// Faktor, um Basiseinheiten in Artikeleinheiten umzurechnen.
    var articleUnitFactor: Double {
        if let size = packageSize, size > 0 { return size }
        return unitFactor == 0 ? 1 : unitFactor
    }

    var stockInArticleUnits: Double { stock / articleUnitFactor }
}

struct LookupResult: Codable {
    let found: Bool
    let existingProduct: Product?
    let suggestion: Suggestion?
    let groupId: Int?
    let groupName: String?

    enum CodingKeys: String, CodingKey {
        case found, suggestion
        case existingProduct = "existing_product"
        case groupId = "group_id"
        case groupName = "group_name"
    }

    struct Suggestion: Codable {
        let barcode: String?
        let name: String
        let brand: String?
        let imageUrl: String?
        let baseUnit: String?
        let packageSize: Double?
        let quantityText: String?

        enum CodingKeys: String, CodingKey {
            case barcode, name, brand
            case imageUrl = "image_url"
            case baseUnit = "base_unit"
            case packageSize = "package_size"
            case quantityText = "quantity_text"
        }
    }
}

struct Lot: Codable, Identifiable, Hashable {
    let id: Int
    let productId: Int
    let quantity: Double
    let bestBefore: String?
    let locationId: Int?

    enum CodingKeys: String, CodingKey {
        case id, quantity
        case productId = "product_id"
        case bestBefore = "best_before"
        case locationId = "location_id"
    }
}

struct StorageLocation: Codable, Identifiable, Hashable {
    let id: Int
    let name: String
    let parentId: Int?

    enum CodingKeys: String, CodingKey {
        case id, name
        case parentId = "parent_id"
    }
}

struct CheckInLine: Codable {
    let quantity: Double
    let bestBefore: String?
    let locationId: Int?

    enum CodingKeys: String, CodingKey {
        case quantity
        case bestBefore = "best_before"
        case locationId = "location_id"
    }
}

struct BatchCheckInRequest: Codable {
    let productId: Int
    let unit: String
    let lines: [CheckInLine]

    enum CodingKeys: String, CodingKey {
        case unit, lines
        case productId = "product_id"
    }
}

struct CheckOutRequest: Codable {
    let productId: Int
    let quantity: Double
    let unit: String
    let lotId: Int?

    enum CodingKeys: String, CodingKey {
        case quantity, unit
        case productId = "product_id"
        case lotId = "lot_id"
    }
}

struct StockResponse: Codable {
    let productStock: Double

    enum CodingKeys: String, CodingKey {
        case productStock = "product_stock"
    }
}

struct NewProductRequest: Codable {
    let barcode: String?
    let name: String
    let brand: String?
    let imageUrl: String?
    let baseUnit: String
    let packageSize: Double?
    let packageLabel: String?
    let groupId: Int?

    enum CodingKeys: String, CodingKey {
        case barcode, name, brand
        case imageUrl = "image_url"
        case baseUnit = "base_unit"
        case packageSize = "package_size"
        case packageLabel = "package_label"
        case groupId = "group_id"
    }
}