/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

import Foundation
import Shared
import Storage
import SwiftyJSON

open class HistoryPayload: CleartextPayloadJSON {
    open class func fromJSON(_ json: JSON) -> HistoryPayload? {
        let p = HistoryPayload(json)
        if p.isValid() {
            return p
        }
        return nil
    }

    override open func isValid() -> Bool {
        if !super.isValid() {
            return false
        }

        if self["deleted"].bool ?? false {
            return true
        }

        return self["histUri"].string != nil &&      // TODO: validate URI.
               self["title"].isStringOrNull() &&
               self["visits"].isArray()
    }

    open func asPlace() -> Place {
        return Place(guid: self.id, url: self.histURI, title: self.title)
    }

    var visits: [Visit] {
        let visits = self["visits"].arrayObject as! [[String: Any]]
        return optFilter(visits.map(Visit.fromJSON))
    }

    fileprivate var histURI: String {
        return self["histUri"].string!
    }

    var historyURI: URL {
        return self.histURI.asURL!
    }

    var title: String {
        return self["title"].string ?? ""
    }

    override open func equalPayloads(_ obj: CleartextPayloadJSON) -> Bool {
        if let p = obj as? HistoryPayload {
            if !super.equalPayloads(p) {
                return false
            }

            if p.deleted {
                return self.deleted == p.deleted
            }

            // If either record is deleted, these other fields might be missing.
            // But we just checked, so we're good to roll on.

            if p.title != self.title {
                return false
            }

            if p.historyURI != self.historyURI {
                return false
            }

            // TODO: compare visits.

            return true
        }

        return false
    }
}