// API/APIModels.swift
// -------------------
// Codable structs that map to the JSON responses from the JQC Flask API.
// All API responses use the envelope: { "ok": bool, "data": {...}, "error": string? }

import Foundation

// ── API Envelope ──────────────────────────────────────────────────────────────

struct APIResponse<T: Decodable>: Decodable {
    let ok: Bool
    let data: T?
    let error: String?
}

// ── Auth ──────────────────────────────────────────────────────────────────────

struct LoginResponseData: Decodable {
    let accessToken: String
    let refreshToken: String
    let tokenType: String
    let expiresIn: Int
    let user: APIUser
}

struct RefreshResponseData: Decodable {
    let accessToken: String
    let refreshToken: String
    let tokenType: String
    let expiresIn: Int
}

struct MeResponseData: Decodable {
    let user: APIUser
}

struct APIUser: Decodable {
    let id: Int
    let username: String
    let email: String
    let role: String
    let createdAt: String?

    // Computed display name: full name if present, otherwise username.
    // The server's /auth/me endpoint returns username; display_name would
    // require a separate field. For Phase A we use username as the display name
    // and can extend later.
    var displayName: String { username }
}

// ── Facilities ────────────────────────────────────────────────────────────────

struct FacilitiesResponseData: Decodable {
    let facilities: [APIFacility]
    let count: Int
}

struct AreasResponseData: Decodable {
    let facilityId: Int
    let areas: [APIArea]
    let count: Int
}

struct APIFacility: Decodable, Identifiable {
    let id: Int
    let name: String
    let address: String
    let contactPerson: String
    let contactPhone: String
    let projectId: Int?
    let projectName: String?
    let isActive: Bool
}

struct APIArea: Decodable, Identifiable {
    let id: Int
    let facilityId: Int
    let name: String
    let areaType: String
}

// ── Templates ─────────────────────────────────────────────────────────────────

struct TemplatesResponseData: Decodable {
    let templates: [APITemplateSummary]
    let count: Int
}

struct TemplateDetailResponseData: Decodable {
    let template: APITemplate
}

struct APITemplateSummary: Decodable, Identifiable {
    let id: Int
    let name: String
    let description: String
    let frequency: String
}

struct APITemplate: Decodable, Identifiable {
    let id: Int
    let name: String
    let description: String
    let frequency: String
    let formSchema: [[String: AnyDecodable]]   // Dynamic JSON fields
}

// ── AnyDecodable helper ───────────────────────────────────────────────────────
// Allows decoding JSON values of unknown type (String, Int, Bool, Array, Dict)

struct AnyDecodable: Decodable {
    let value: Any

    init(_ value: Any) {
        self.value = value
    }

    init(from decoder: Decoder) throws {
        let container = try decoder.singleValueContainer()
        if let bool = try? container.decode(Bool.self)   { value = bool; return }
        if let int  = try? container.decode(Int.self)    { value = int;  return }
        if let dbl  = try? container.decode(Double.self) { value = dbl;  return }
        if let str  = try? container.decode(String.self) { value = str;  return }
        if let arr  = try? container.decode([AnyDecodable].self) {
            value = arr.map(\.value); return
        }
        if let dict = try? container.decode([String: AnyDecodable].self) {
            value = dict.mapValues(\.value); return
        }
        value = NSNull()
    }
}