import QtQuick 2.2
import Sailfish.Silica 1.0
import "../js/henflow.js" as HF
import "../js/i18n.js" as I18N
import "../js/catalog.js" as Catalog

// Nuova gallina / modifica di una gallina: nome, data di nascita e stato di
// deposizione. La data si sceglie con tre selettori (giorno, mese, anno):
// la combinazione viene mostrata e controllata subito (niente date impossibili).
// Come nell'app Flutter, alla scelta della data lo stato si adegua da solo:
// sotto i 6 mesi la gallina non e' in deposizione.
Page {
    id: page
    allowedOrientations: Orientation.All

    property string breedId: ""
    property var hen: null          // null = nuova gallina
    property string lang: "en"

    property int year: 0
    property int month: 1
    property int day: 1
    property int daysInMonth: 31
    property bool laying: true
    property string errorMsg: ""

    readonly property int firstYear: 2010

    function tr(key, arg) { return I18N.t(key, arg, page.lang) }

    function monthLength(y, m) {
        // giorni del mese: il 31 c'e' solo dove esiste davvero
        if (m === 2)
            return (y % 4 === 0 && (y % 100 !== 0 || y % 400 === 0)) ? 29 : 28
        if (m === 4 || m === 6 || m === 9 || m === 11)
            return 30
        return 31
    }

    function isoOfSelection() {
        return HF.isoDay(new Date(page.year, page.month - 1, page.day))
               + "T00:00:00.000"
    }

    function monthsOfSelection() {
        return HF.ageInMonths(new Date(page.year, page.month - 1, page.day), HF.todayMidnight())
    }

    function refreshSelection() {
        page.daysInMonth = page.monthLength(page.year, page.month)
        if (page.day > page.daysInMonth)
            page.day = page.daysInMonth
    }

    function applyDefaultDate() {
        // Come l'originale: si parte da 180 giorni fa (una gallina in deposizione)
        var d = HF.addDays(HF.todayMidnight(), -180)
        page.year = d.getFullYear()
        page.month = d.getMonth() + 1
        page.day = d.getDate()
        page.refreshSelection()
    }

    function reload() {
        page.lang = I18N.langFor(appSettings.language, Qt.locale().name)

        if (page.hen) {
            var birth = HF.parseIso(page.hen.birthDate)
            if (birth) {
                page.year = birth.getFullYear()
                page.month = birth.getMonth() + 1
                page.day = birth.getDate()
            } else {
                page.applyDefaultDate()
            }
            page.laying = page.hen.isLaying
            nameField.text = page.hen.name
        } else {
            page.applyDefaultDate()
            page.laying = page.monthsOfSelection() >= 6
        }
        page.refreshSelection()
    }

    function save() {
        var name = nameField.text.trim()
        if (name.length === 0) {
            page.errorMsg = page.tr("hen_name")
            return
        }

        var settings = appData.breedSettings()
        var target = null
        for (var i = 0; i < settings.length; i++) {
            if (settings[i].breedId === page.breedId)
                target = settings[i]
        }
        if (!target) {
            page.errorMsg = page.tr("config_breed_first")
            return
        }
        if (!target.hens)
            target.hens = []

        var record = {
            "id": page.hen ? page.hen.id : HF.newId(),
            "name": name,
            "birthDate": page.isoOfSelection(),
            "isLaying": page.laying
        }

        if (page.hen) {
            for (var j = 0; j < target.hens.length; j++) {
                if (target.hens[j].id === record.id)
                    target.hens[j] = record
            }
        } else {
            target.hens.push(record)
        }

        appData.saveBreedSettings(settings)
        pageStack.pop()
    }

    Component.onCompleted: page.reload()

    SilicaFlickable {
        anchors.fill: parent
        contentHeight: form.height

        Column {
            id: form
            width: parent.width
            spacing: Theme.paddingMedium

            PageHeader { title: page.tr("new_hen") }

            TextField {
                id: nameField
                width: parent.width
                label: page.tr("hen_name")
                placeholderText: page.tr("hen_name")
                EnterKey.enabled: true
                EnterKey.onClicked: page.save()
            }

            SectionHeader { text: page.tr("birth_date") }

            Row {
                x: Theme.horizontalPageMargin
                width: parent.width - 2 * Theme.horizontalPageMargin
                spacing: Theme.paddingSmall

                ComboBox {
                    id: dayBox
                    width: (parent.width - 2 * parent.spacing) / 3
                    label: "DD"
                    menu: ContextMenu {
                        Repeater {
                            model: page.daysInMonth
                            delegate: MenuItem {
                                text: String(index + 1)
                                onClicked: {
                                    page.day = index + 1
                                    dayBox.currentIndex = index
                                }
                            }
                        }
                    }
                }

                ComboBox {
                    id: monthBox
                    width: (parent.width - 2 * parent.spacing) / 3
                    label: "MM"
                    menu: ContextMenu {
                        Repeater {
                            model: 12
                            delegate: MenuItem {
                                text: String(index + 1)
                                onClicked: {
                                    page.month = index + 1
                                    page.refreshSelection()
                                    monthBox.currentIndex = index
                                }
                            }
                        }
                    }
                }

                ComboBox {
                    id: yearBox
                    width: (parent.width - 2 * parent.spacing) / 3
                    label: "YYYY"
                    menu: ContextMenu {
                        Repeater {
                            model: HF.todayMidnight().getFullYear() - page.firstYear + 1
                            delegate: MenuItem {
                                text: String(page.firstYear + index)
                                onClicked: {
                                    page.year = page.firstYear + index
                                    page.refreshSelection()
                                    yearBox.currentIndex = index
                                }
                            }
                        }
                    }
                }
            }

            Column {
                x: Theme.horizontalPageMargin
                width: parent.width - 2 * Theme.horizontalPageMargin
                spacing: Theme.paddingSmall

                Label {
                    width: parent.width
                    text: page.tr("birth") + ": " + HF.formatDay(page.isoOfSelection())
                    color: Theme.primaryColor
                    truncationMode: TruncationMode.Fade
                }

                Label {
                    width: parent.width
                    text: page.tr("age_months", page.monthsOfSelection())
                          + " · " + (page.monthsOfSelection() >= 6 ? page.tr("laying_6_months") : page.tr("status_young"))
                    color: Theme.secondaryColor
                    font.pixelSize: Theme.fontSizeSmall
                    truncationMode: TruncationMode.Fade
                }
            }

            TextSwitch {
                id: layingSwitch
                text: page.tr("in_laying")
                checked: page.laying
                onClicked: page.laying = !page.laying
            }

            Label {
                x: Theme.horizontalPageMargin
                width: parent.width - 2 * Theme.horizontalPageMargin
                text: page.errorMsg
                color: Theme.errorColor
                font.pixelSize: Theme.fontSizeSmall
                wrapMode: Text.Wrap
                visible: text.length > 0
            }

            Button {
                anchors.horizontalCenter: parent.horizontalCenter
                text: page.tr("save")
                onClicked: page.save()
            }

            Item { width: parent.width; height: Theme.paddingLarge }
        }

        VerticalScrollDecorator {}
    }
}