import Foundation
import CoreGraphics

enum LeadDetailSampleData {
    static let tanks = [
        LeadTankOption(id: "2700", title: "2.700 l", tank: Tank(size: .t1_2)),
        LeadTankOption(id: "4850", title: "4.850 l", tank: Tank(size: .t2_1)),
        LeadTankOption(id: "underground", title: "Unterirdisch",
                       tank: Tank(size: .t1_2, color: .green, placement: .belowGround))
    ]

    static func make(for lead: Lead) -> LeadDetail {
        let isHoffmann = lead.id == "L-240318"
        let offers = isHoffmann ? hoffmannOffers(leadID: lead.id) : genericOffers(for: lead)
        let photos = isHoffmann ? (1...10).map { index in
            LeadPhoto(id: "\(lead.id)-photo-\(index)", title: "Standortaufnahme \(index)", isAR: index < 3,
                      thumbnail: LeadFileReference(id: "\(lead.id)-thumb-\(index)", version: "1", kind: .image),
                      original: LeadFileReference(id: "\(lead.id)-image-\(index)", version: "1", kind: .image))
        } : []
        let name = lead.contact.map { [$0.title, $0.firstName, $0.lastName].compactMap { $0 }.joined(separator: " ") }
        return LeadDetail(lead: lead, customerType: lead.companyName == nil ? "Privatkunde" : "Gewerbekunde",
                          contactName: isHoffmann ? "Klaus Hoffmann" : name,
                          contactRole: isHoffmann ? "Geschäftsführer" : nil,
                          mobile: isHoffmann ? "0171 338 4206" : nil,
                          email: isHoffmann ? "info@baeckerei-hoffmann.de" : nil,
                          tankOptions: tanks, offers: offers, photos: photos)
    }

    private static func document(_ id: String, _ title: String, pages: Int, signed: Bool = false) -> LeadDocument {
        LeadDocument(id: id, title: title, pageCount: pages, status: signed ? .signed : .pending,
                     file: LeadFileReference(id: id, version: "signature-preview-1", kind: .pdf),
                     signaturePlacement: PDFSignaturePlacement(
                        pageIndex: 0, bounds: CGRect(x: 310, y: 76, width: 237, height: 60)))
    }

    private static func date(_ month: Int, _ day: Int) -> Date? {
        Calendar(identifier: .gregorian).date(from: DateComponents(year: 2026, month: month, day: day, hour: 12))
    }

    private static func hoffmannOffers(leadID: String) -> [LeadOffer] {
        let prefix = "\(leadID)-"
        let contracts = LeadDocumentGroup(id: prefix + "contracts", title: "Vertragsunterlagen", documents: [
            document(prefix + "purchase", "Kaufvertrag Flüssiggastank.pdf", pages: 4),
            document(prefix + "gas", "Gasliefervertrag.pdf", pages: 6),
            document(prefix + "sepa", "SEPA-Lastschriftmandat.pdf", pages: 1)
        ])
        let technical = LeadDocumentGroup(id: prefix + "technical", title: "Technik & Sicherheit", documents: [
            document(prefix + "plan", "Aufstellungsplan Tank.pdf", pages: 2),
            document(prefix + "safety", "Sicherheitsdatenblatt Propan.pdf", pages: 3, signed: true)
        ])
        let privacy = LeadDocumentGroup(id: prefix + "privacy", title: "Datenschutz", documents: [
            document(prefix + "consent", "Datenschutzeinwilligung.pdf", pages: 1, signed: true)
        ])
        let rental = LeadDocumentGroup(id: prefix + "rental", title: "Vertragsunterlagen", documents: [
            document(prefix + "rental-contract", "Mietvertrag Flüssiggastank.pdf", pages: 5),
            document(prefix + "rental-gas", "Gasliefervertrag.pdf", pages: 6),
            document(prefix + "rental-sepa", "SEPA-Lastschriftmandat.pdf", pages: 1),
            document(prefix + "rental-plan", "Aufstellungsplan.pdf", pages: 2),
            document(prefix + "rental-privacy", "Datenschutzeinwilligung.pdf", pages: 1)
        ])
        return [
            LeadOffer(id: "A-2026-1182", title: "Flüssiggastank 2.700 l oberirdisch", kind: .purchase,
                      amount: 4980, billing: .once, validUntil: date(11, 30), acceptedAt: nil,
                      groups: [contracts, technical, privacy], tank: Tank(size: .t1_2)),
            LeadOffer(id: "A-2026-1197", title: "Flüssiggastank 4.850 l unterirdisch", kind: .rental,
                      amount: 39, billing: .monthly, validUntil: date(12, 15), acceptedAt: nil, groups: [rental],
                      tank: Tank(size: .t2_1, color: .olive, placement: .belowGround)),
            LeadOffer(id: "A-2026-1043", title: "Wartungsvertrag Gasanlage", kind: .service,
                      amount: 129, billing: .annually, validUntil: nil, acceptedAt: date(10, 30),
                      groups: [LeadDocumentGroup(id: prefix + "service", title: "Vertragsunterlagen", documents: [
                        document(prefix + "maintenance", "Wartungsvertrag Gasanlage.pdf", pages: 3, signed: true)
                      ])])
        ]
    }

    private static func genericOffers(for lead: Lead) -> [LeadOffer] {
        guard lead.offerCount > 0 else { return [] }
        return (0..<lead.offerCount).map { index in
            let count = lead.unsignedContractCount / lead.offerCount
                + (index < lead.unsignedContractCount % lead.offerCount ? 1 : 0)
            let documents = (0..<max(1, count)).map { number in
                document("\(lead.id)-offer-\(index)-doc-\(number)", "Vertragsunterlage \(number + 1).pdf",
                         pages: 2, signed: count == 0)
            }
            return LeadOffer(id: "\(lead.id)-A-\(index + 1)", title: "Flüssiggastank 2.700 l oberirdisch",
                             kind: .purchase, amount: 4980, billing: .once,
                             validUntil: date(11, 30), acceptedAt: nil,
                             groups: [LeadDocumentGroup(id: "\(lead.id)-group-\(index)",
                                                       title: "Vertragsunterlagen", documents: documents)], tank: Tank(size: .t1_2))
        }
    }
}