package HikNetSDK

import (
    "sync"
    "unsafe"
)

type HIKNvr struct {
    core      unsafe.Pointer
    State     bool
    NvrConfig Nvr
    mux       sync.RWMutex
}

func NewHIKNvr(nvrConfig Nvr) *HIKNvr {
    return &HIKNvr{
        core:      newHIKNvr(),
        NvrConfig: nvrConfig,
        State:     false,
        mux:       sync.RWMutex{},
    }
}

func (h *HIKNvr) opt(action func() bool) bool {
    h.mux.RLock()
    if h.State {
        h.mux.RUnlock()
        h.mux.Lock()
        h.State = action()
        h.mux.Unlock()
    }
    h.mux.RUnlock()
    return h.State
}

func (h *HIKNvr) Login() bool {
    h.mux.Lock()
    h.State = initNvr(h.core, h.NvrConfig.Ip, h.NvrConfig.Port, h.NvrConfig.User, h.NvrConfig.Password, h.NvrConfig.Channel)
    h.mux.Unlock()
    return h.State
}

func (h *HIKNvr) CheckTimeRegionWithMonth(year int, month int) string {
    h.mux.RLock()
    if h.State {
        h.mux.RUnlock()
        data := checkTimeRegionWithMonth(h.core, year, month)
        if data == "" {
            h.mux.Lock()
            h.State = false
            h.mux.Unlock()
        } else {
            h.mux.Lock()
            h.State = true
            h.mux.Unlock()
            return data
        }
    } else {
        h.mux.RUnlock()
    }
    return ""
}

func (h *HIKNvr) CheckTimeRegionWithDay(year int, month int, day int) string {
    h.mux.RLock()
    if h.State {
        h.mux.RUnlock()
        data := checkTimeRegionWithDay(h.core, year, month, day)
        if data == "" {
            h.mux.Lock()
            h.State = false
            h.mux.Unlock()
        } else {
            h.mux.Lock()
            h.State = true
            h.mux.Unlock()
            return data
        }
    } else {
        h.mux.RUnlock()
    }
    return ""
}
func (h *HIKNvr) UTCDiff() int {
    h.mux.RLock()
    if h.State {
        data := nvrUTCDiff(h.core)
        h.mux.RUnlock()
        if nvrUTCDiff(h.core) == 5000 {
            h.mux.Lock()
            h.State = false
            h.mux.Unlock()
        } else {
            h.mux.Lock()
            h.State = true
            h.mux.Unlock()
            return data
        }
    } else {
        h.mux.RUnlock()
    }
    return 5000
}