#include "settings_menu.h"

#include "choices.h"

namespace roro {

namespace {

using Row = SettingsMenu::Row;
using Kind = SettingsMenu::Kind;

struct RowDef {
    Row row;
    Kind kind;
    const char* label;
};

const RowDef kRows[] = {
    {Row::LongName, Kind::Text, "Long name"},   {Row::ShortName, Kind::Text, "Short name"},
    {Row::Region, Kind::Choice, "Region"},      {Row::Timezone, Kind::Choice, "Timezone"},
    {Row::Brightness, Kind::Slider, "Brightness"}, {Row::DimTimeout, Kind::Choice, "Dim after"},
    {Row::OffTimeout, Kind::Choice, "Screen off after"}, {Row::Sound, Kind::Toggle, "Sound & LED"},
    {Row::Gnss, Kind::Toggle, "GNSS"}, {Row::GnssQuiet, Kind::Toggle, "Pause GNSS for LoRa"},
    {Row::Coordinates, Kind::Toggle, "Coordinates"},
    {Row::ProbeMacs, Kind::Toggle, "Probe MACs"}, {Row::Wifi, Kind::Page, "Wi-Fi"},
    {Row::CheckUpdates, Kind::Toggle, "Check for updates"}, {Row::Firmware, Kind::Page, "Firmware"},
    {Row::About, Kind::Page, "About"},
};

const int kDimSeconds[] = {10, 15, 30, 60, 120, 300};
const int kOffSeconds[] = {30, 60, 120, 300, 600, 1800};

std::string formatSeconds(int s) { return s < 60 ? std::to_string(s) + " s" : std::to_string(s / 60) + " min"; }

template <size_t N>
std::vector<std::string> labels(const Choice (&table)[N]) {
    std::vector<std::string> out;
    for (auto& c : table) out.push_back(c.label);
    return out;
}

template <size_t N>
std::vector<std::string> durations(const int (&seconds)[N]) {
    std::vector<std::string> out;
    for (int s : seconds) out.push_back(formatSeconds(s));
    return out;
}

template <size_t N>
int indexOf(const Choice (&table)[N], const std::string& value) {
    for (size_t i = 0; i < N; i++)
        if (value == table[i].value) return static_cast<int>(i);
    return -1;
}

template <size_t N>
int indexOf(const int (&table)[N], int value) {
    for (size_t i = 0; i < N; i++)
        if (table[i] == value) return static_cast<int>(i);
    return -1;
}

}  // namespace

int SettingsMenu::count() const { return sizeof(kRows) / sizeof(kRows[0]); }
SettingsMenu::Row SettingsMenu::row(int i) const { return kRows[i].row; }
SettingsMenu::Kind SettingsMenu::kind(int i) const { return kRows[i].kind; }
std::string SettingsMenu::label(int i) const { return kRows[i].label; }

std::string SettingsMenu::value(int i) const {
    switch (row(i)) {
        case Row::LongName: return settings_.getString(Setting::LongName);
        case Row::ShortName: return settings_.getString(Setting::ShortName);
        case Row::Region: return settings_.getString(Setting::Region);
        case Row::Timezone: {
            int c = currentChoice(i);
            return c >= 0 ? kTimezones[c].label : "Custom";
        }
        case Row::Brightness: return std::to_string(settings_.getInt(Setting::Brightness)) + "%";
        case Row::DimTimeout: return formatSeconds(settings_.getInt(Setting::DimTimeoutS));
        case Row::OffTimeout: return formatSeconds(settings_.getInt(Setting::OffTimeoutS));
        case Row::Sound: return settings_.getBool(Setting::Sound) ? "On" : "Off";
        case Row::Gnss: return settings_.getBool(Setting::GnssEnabled) ? "On" : "Off";
        case Row::GnssQuiet: return settings_.getBool(Setting::GnssQuietForLora) ? "On" : "Off";
        case Row::CheckUpdates: return settings_.getBool(Setting::CheckUpdates) ? "Daily" : "Off";
        case Row::Coordinates: return settings_.getBool(Setting::CoordinatesDms) ? "Deg min sec" : "Decimal";
        case Row::ProbeMacs: return settings_.getBool(Setting::ProbeMacRaw) ? "Raw" : "Pseudonymised";
        case Row::Wifi: return settings_.getBool(Setting::WifiEnabled) ? "On" : "Off";
        default: return "";
    }
}

std::vector<std::string> SettingsMenu::choices(int i) const {
    switch (row(i)) {
        case Row::Region: return labels(kRegions);
        case Row::Timezone: return labels(kTimezones);
        case Row::DimTimeout: return durations(kDimSeconds);
        case Row::OffTimeout: return durations(kOffSeconds);
        default: return {};
    }
}

int SettingsMenu::currentChoice(int i) const {
    switch (row(i)) {
        case Row::Region: return indexOf(kRegions, settings_.getString(Setting::Region));
        case Row::Timezone: return indexOf(kTimezones, settings_.getString(Setting::Timezone));
        case Row::DimTimeout: return indexOf(kDimSeconds, settings_.getInt(Setting::DimTimeoutS));
        case Row::OffTimeout: return indexOf(kOffSeconds, settings_.getInt(Setting::OffTimeoutS));
        default: return -1;
    }
}

std::string SettingsMenu::choose(int i, int c) {
    switch (row(i)) {
        case Row::Region:
            settings_.setString(Setting::Region, kRegions[c].value);
            settings_.setBool(Setting::RegionConfirmed, true);
            return "";
        case Row::Timezone: settings_.setString(Setting::Timezone, kTimezones[c].value); return "";
        case Row::DimTimeout:
            return settings_.setInt(Setting::DimTimeoutS, kDimSeconds[c]) ? "" : "Dimming must happen before screen off";
        case Row::OffTimeout:
            return settings_.setInt(Setting::OffTimeoutS, kOffSeconds[c]) ? "" : "Screen off must come after dimming";
        default: return "Not a choice";
    }
}

void SettingsMenu::toggle(int i) {
    if (row(i) == Row::Sound) settings_.setBool(Setting::Sound, !settings_.getBool(Setting::Sound));
    if (row(i) == Row::Gnss) settings_.setBool(Setting::GnssEnabled, !settings_.getBool(Setting::GnssEnabled));
    if (row(i) == Row::GnssQuiet) settings_.setBool(Setting::GnssQuietForLora, !settings_.getBool(Setting::GnssQuietForLora));
    if (row(i) == Row::CheckUpdates) settings_.setBool(Setting::CheckUpdates, !settings_.getBool(Setting::CheckUpdates));
    if (row(i) == Row::Coordinates) settings_.setBool(Setting::CoordinatesDms, !settings_.getBool(Setting::CoordinatesDms));
    if (row(i) == Row::ProbeMacs) settings_.setBool(Setting::ProbeMacRaw, !settings_.getBool(Setting::ProbeMacRaw));
}

void SettingsMenu::adjust(int i, int direction) {
    if (row(i) != Row::Brightness) return;
    int next = settings_.getInt(Setting::Brightness) + (direction > 0 ? 10 : -10);
    if (next < 10) next = 10;
    if (next > 100) next = 100;
    settings_.setInt(Setting::Brightness, next);
}

int SettingsMenu::maxBytes(int i) const {
    return row(i) == Row::ShortName ? 4 : row(i) == Row::LongName ? 39 : 0;
}

std::string SettingsMenu::setText(int i, const std::string& text) {
    Setting s = row(i) == Row::ShortName ? Setting::ShortName : Setting::LongName;
    if (settings_.setString(s, text)) return "";
    return "Must be 1 to " + std::to_string(maxBytes(i)) + " bytes";
}

}  // namespace roro