/*  Please don't take code in this file very seriously !!!

    I was "kinda" forced to write this implementation "this way" because the Servo code implementation
    from multiwii is so horrible, obstructive and non dynamic, not to mention it doesn't make any sense
    that there was just no other way around this then hardcoding/implementing each model separately.
*/

function tab_initialize_servos() {
    ga_tracker.sendAppView('Servos');
    GUI.active_tab = 'servos';

    var model = $('div.tab-servos strong.model');
    var supported_models = [1, 4, 8, 14, 20, 21];
    
    // request current Servos Config
    send_message(MSP_codes.MSP_IDENT, MSP_codes.MSP_IDENT, false, function() {
        send_message(MSP_codes.MSP_SERVO_CONF, MSP_codes.MSP_SERVO_CONF, false, function() {
            // drop previous table
            $('div.tab-servos table.fields tr:not(:first)').remove();
            
            switch (CONFIG.multiType) {
                case 1: // TRI
                    // looking ok so far
                    model.html('TRI');
                    
                    process_directions('YAW', 5, 0);
                    
                    process_servos('Yaw Servo', '', 5, false);
                    break;
                case 4: // BI
                    // looking ok so far
                    model.html('BI');
                    
                    process_directions('L YAW', 4, 1);
                    process_directions('R YAW', 5, 1);
                    process_directions('L NICK', 4, 0);
                    process_directions('R NICK', 5, 0);
                    
                    process_servos('Left Servo', '', 4, false);
                    process_servos('Right Servo', '', 5, false);
                    break;
                case 5: // Gimbal
                    // Gimbal doesn't seem to be supported for now
                    model.html('Doesn\'t support servos');
                    
                    /*
                    model.html('Gimbal');
                    
                    process_servos('Pitch Servo', '', SERVO_CONFIG[0]);
                    process_servos('Roll Servo', '', SERVO_CONFIG[1]);
                    
                    servos = [0, 1];
                    */
                    break;
                case 8: // Flying Wing
                    // looking ok so far
                    model.html('Flying Wing');
                    
                    process_directions('L ROLL', 3, 1);
                    process_directions('R ROLL', 4, 1);
                    process_directions('L NICK', 3, 0);
                    process_directions('R NICK', 4, 0);
                    
                    process_servos('Left Wing', '', 3, false);
                    process_servos('Right Wing', '', 4, false);
                    break;
                case 14: // Airplane
                    model.html('Airplane');
                    
                    // rate
                    process_servos('Wing 1', '', 3, 2);
                    process_servos('Wing 2', '', 4, 2);
                    process_servos('Rudd', '', 5, 2);
                    process_servos('Elev', '', 6, 2);
                    break;
                case 20: // Dualcopter
                    // looking ok so far
                    model.html('Dualcopter');
                    
                    process_directions('PITCH', 4, 0);
                    process_directions('ROLL', 5, 0);
                    
                    process_servos('Roll', '', 5, false);
                    process_servos('Nick', '', 4, false);
                    break;
                case 21: // Singlecopter
                    // looking ok so far
                    model.html('Singlecopter');
                    
                    process_servos('Right', 'R YAW', 3, true);
                    process_servos('Left', 'L YAW', 4, true);
                    process_servos('Front', 'F YAW', 5, true);
                    process_servos('Rear', 'YAW', 6, true);
                    break;
                default:
                    model.html('Doesn\'t support servos');
            }
            
            // UI hooks for dynamically generated elements
            $('table.directions select, table.directions input, table.fields select, table.fields input').change(function() {
                if ($('div.live input').is(':checked')) {
                    // apply small delay as there seems to be some funky update business going wrong
                    GUI.timeout_add('servos_update', servos_update, 10);
                }
            });
        });
    });
    
    $('a.update').click(function() {
        if (supported_models.indexOf(CONFIG.multiType) != -1) {
            servos_update(true);
        }
    });
}

function servos_update(save_to_eeprom) {
    // update bitfields
    $('div.tab-servos table.directions tr:not(".main")').each(function() {
        var info = $('select', this).data('info');
        var val = parseInt($('select', this).val());
        
        // in this stage we need to know which bitfield and which bitposition needs to be flipped
        if (val) SERVO_CONFIG[info.obj].rate = bit_set(SERVO_CONFIG[info.obj].rate, info.bitpos);
        else SERVO_CONFIG[info.obj].rate = bit_clear(SERVO_CONFIG[info.obj].rate, info.bitpos);
    });
    
    // update the rest
    $('div.tab-servos table.fields tr:not(".main")').each(function() {
        var info = $(this).data('info');
        
        if ($('.middle input', this).is(':disabled')) {
            var val = $('.channel input:checked', this).index();
            
            SERVO_CONFIG[info.obj].middle = parseInt(val);
        } else {
            SERVO_CONFIG[info.obj].middle = parseInt($('.middle input', this).val());
        }
        
        SERVO_CONFIG[info.obj].min = parseInt($('.min input', this).val());
        SERVO_CONFIG[info.obj].max = parseInt($('.max input', this).val());

        // update rate if direction fields exist
        if ($('.direction input', this).length) {
            if ($('.direction input:first', this).is(':checked')) SERVO_CONFIG[info.obj].rate = bit_set(SERVO_CONFIG[info.obj].rate, 0);
            else SERVO_CONFIG[info.obj].rate = bit_clear(SERVO_CONFIG[info.obj].rate, 0);
            
            if ($('.direction input:last', this).is(':checked')) SERVO_CONFIG[info.obj].rate = bit_set(SERVO_CONFIG[info.obj].rate, 1);
            else SERVO_CONFIG[info.obj].rate = bit_clear(SERVO_CONFIG[info.obj].rate, 1);
        } else if ($('.direction select', this).length) {
            var val = parseInt($('.direction select', this).val());
            SERVO_CONFIG[info.obj].rate = val;                
        }
    });
    
    // send settings over to mcu
    var buffer_out = [];
    
    var needle = 0;
    for (var i = 0; i < SERVO_CONFIG.length; i++) {
        buffer_out[needle++] = lowByte(SERVO_CONFIG[i].min);
        buffer_out[needle++] = highByte(SERVO_CONFIG[i].min);
        
        buffer_out[needle++] = lowByte(SERVO_CONFIG[i].max);
        buffer_out[needle++] = highByte(SERVO_CONFIG[i].max);
        
        buffer_out[needle++] = lowByte(SERVO_CONFIG[i].middle);
        buffer_out[needle++] = highByte(SERVO_CONFIG[i].middle);
        
        buffer_out[needle++] = lowByte(SERVO_CONFIG[i].rate);
    }
    
    send_message(MSP_codes.MSP_SET_SERVO_CONF, buffer_out);
    
    if (save_to_eeprom) {
        // Save changes to EEPROM
        send_message(MSP_codes.MSP_EEPROM_WRITE, MSP_codes.MSP_EEPROM_WRITE);
    }
}

function process_directions(name, obj, bitpos) {
    var val;
    
    $('div.tab-servos table.directions').append('\
        <tr>\
            <td class="name" style="text-align: center">' + name + '</td>\
            <td class="direction" style="text-align: right">\
                <select name="direction">\
                    <option value="0">Normal</option>\
                    <option value="1">Reverse</option>\
                </select>\
            </td>\
        </tr>\
    ');
    
    if (bit_check(SERVO_CONFIG[obj].rate, bitpos)) val = 1;
    else val = 0;

    $('div.tab-servos table.directions tr:last select').val(val);
    $('div.tab-servos table.directions tr:last select').data('info', {'obj': obj, 'bitpos': bitpos});
}

function process_servos(name, alternate, obj, directions) {    
    $('div.tab-servos table.fields').append('\
        <tr> \
            <td style="text-align: center">' + name + '</td>\
            <td class="middle"><input type="number" min="1000" max="2000" value="' + SERVO_CONFIG[obj].middle +'" /></td>\
            <td class="min"><input type="number" min="1000" max="2000" value="' + SERVO_CONFIG[obj].min +'" /></td>\
            <td class="max"><input type="number" min="1000" max="2000" value="' + SERVO_CONFIG[obj].max +'" /></td>\
            <td class="channel">\
                <input type="checkbox"/>\
                <input type="checkbox"/>\
                <input type="checkbox"/>\
                <input type="checkbox"/>\
                <input type="checkbox"/>\
                <input type="checkbox"/>\
                <input type="checkbox"/>\
                <input type="checkbox"/>\
            </td>\
            <td class="direction">\
                <input class="first" type="checkbox"/><span class="name">' + name + '</span>\
                <input class="second" type="checkbox"/><span class="alternate">' + alternate + '</span>\
            </td>\
        </tr> \
    ');    
    
    if (SERVO_CONFIG[obj].middle <= 7) {
        $('div.tab-servos table.fields tr:last td.middle input').prop('disabled', true);
        $('div.tab-servos table.fields tr:last td.channel').find('input').eq(SERVO_CONFIG[obj].middle).prop('checked', true);
    }
    
    if (directions == true) {
        $('div.tab-servos table.fields tr:last td.direction input:first').prop('checked', bit_check(SERVO_CONFIG[obj].rate, 0));
        $('div.tab-servos table.fields tr:last td.direction input:last').prop('checked', bit_check(SERVO_CONFIG[obj].rate, 1));
    } else if (directions == 2) {
        // removing checkboxes
        $('div.tab-servos table.fields tr:last td.direction').html('');
        
        // adding select box and generating options
        $('div.tab-servos table.fields tr:last td.direction').append('\
            <select class="rate" name="rate"></select>\
        ');
        
        var select = $('div.tab-servos table.fields tr:last td.direction select');
        
        for (var i = 100; i > -101; i--) {
            select.append('<option value="' + i + '">Rate: ' + i + '%</option>');
        }
        
        // select current rate
        select.val(SERVO_CONFIG[obj].rate);
    } else {
        // removing checkboxes
        $('div.tab-servos table.fields tr:last td.direction').html('');
    }
    
    $('div.tab-servos table.fields tr:last').data('info', {'obj': obj});
    
    // UI hooks
    $('div.tab-servos table.fields tr:last td.channel').find('input').click(function() {
        if($(this).is(':checked')) {
            $(this).parent().parent().find('td.middle input').prop('disabled', true);
            $(this).parent().find('input').not($(this)).prop('checked', false);
        } else {
            $(this).parent().parent().find('td.middle input').prop('disabled', false).val(1500);
        }
    });
}