import Foundation
import SwiftData

enum IndicatorStatus: String, Codable, CaseIterable {
    case high, low, normal
}

enum ReportType: String, Codable, CaseIterable {
    case checkup, lab, imaging, prescription, other

    var label: String {
        switch self {
        case .checkup:      return "体检报告"
        case .lab:          return "化验单"
        case .imaging:      return "影像报告"
        case .prescription: return "处方"
        case .other:        return "其他"
        }
    }
}

@Model
final class Indicator {
    var name: String
    var value: String
    var unit: String
    var range: String
    var statusRaw: String
    var note: String?
    var capturedAt: Date

    var report: Report?
    var asset: Asset?
    var pinned: Bool = false

    init(name: String,
         value: String,
         unit: String,
         range: String,
         status: IndicatorStatus,
         note: String? = nil,
         capturedAt: Date = .now,
         report: Report? = nil,
         asset: Asset? = nil,
         pinned: Bool = false) {
        self.name = name
        self.value = value
        self.unit = unit
        self.range = range
        self.statusRaw = status.rawValue
        self.note = note
        self.capturedAt = capturedAt
        self.report = report
        self.asset = asset
        self.pinned = pinned
    }

    var status: IndicatorStatus {
        IndicatorStatus(rawValue: statusRaw) ?? .normal
    }
}

@Model
final class Report {
    var title: String
    var typeRaw: String
    var reportDate: Date
    var institution: String?
    var note: String?
    var summary: String?
    var pageCount: Int
    var createdAt: Date

    @Relationship(deleteRule: .cascade, inverse: \Indicator.report)
    var indicators: [Indicator] = []

    @Relationship(deleteRule: .cascade)
    var assets: [Asset] = []

    init(title: String,
         type: ReportType,
         reportDate: Date,
         institution: String? = nil,
         note: String? = nil,
         summary: String? = nil,
         pageCount: Int = 1,
         createdAt: Date = .now) {
        self.title = title
        self.typeRaw = type.rawValue
        self.reportDate = reportDate
        self.institution = institution
        self.note = note
        self.summary = summary
        self.pageCount = pageCount
        self.createdAt = createdAt
    }

    var type: ReportType {
        ReportType(rawValue: typeRaw) ?? .other
    }
}

@Model
final class DiaryEntry {
    var content: String
    var createdAt: Date
    var tags: [String]

    init(content: String, createdAt: Date = .now, tags: [String] = []) {
        self.content = content
        self.createdAt = createdAt
        self.tags = tags
    }
}

@Model
final class Asset {
    var relativePath: String
    var mimeType: String
    var bytes: Int
    var createdAt: Date

    init(relativePath: String,
         mimeType: String = "image/jpeg",
         bytes: Int = 0,
         createdAt: Date = .now) {
        self.relativePath = relativePath
        self.mimeType = mimeType
        self.bytes = bytes
        self.createdAt = createdAt
    }
}

@Model
final class Symptom {
    var name: String
    var startedAt: Date
    var endedAt: Date?
    var note: String?
    var severity: Int
    var tags: [String]
    var createdAt: Date

    init(name: String,
         startedAt: Date = .now,
         endedAt: Date? = nil,
         note: String? = nil,
         severity: Int = 3,
         tags: [String] = [],
         createdAt: Date = .now) {
        self.name = name
        self.startedAt = startedAt
        self.endedAt = endedAt
        self.note = note
        self.severity = max(1, min(5, severity))
        self.tags = tags
        self.createdAt = createdAt
    }

    var isOngoing: Bool { endedAt == nil }

    var duration: TimeInterval {
        (endedAt ?? .now).timeIntervalSince(startedAt)
    }
}

@Model
final class ChatTurn {
    var question: String
    var answer: String
    var referencedIndicatorIDs: [String]
    var referencedReportIDs: [String]
    var createdAt: Date
    var decodeRate: Double

    init(question: String,
         answer: String,
         referencedIndicatorIDs: [String] = [],
         referencedReportIDs: [String] = [],
         createdAt: Date = .now,
         decodeRate: Double = 0) {
        self.question = question
        self.answer = answer
        self.referencedIndicatorIDs = referencedIndicatorIDs
        self.referencedReportIDs = referencedReportIDs
        self.createdAt = createdAt
        self.decodeRate = decodeRate
    }
}