const path = require('path')
const {
    ipcRenderer
} = require('electron')
const {
    v4: uuidv4
} = require('uuid');
const utf8 = require('utf8');
// https://stackoverflow.com/a/26227660
var appDataFolder = process.env.APPDATA || (process.platform == 'darwin' ? process.env.HOME + '/Library/Application Support' : process.env.HOME + "/.config")
var configFolder = path.join(appDataFolder, "FreeDATA");
var configPath = path.join(configFolder, 'config.json')
const config = require(configPath);
// set date format
const dateFormat = new Intl.DateTimeFormat('en-GB', {
    timeStyle: 'long',
    dateStyle: 'full'
});
// set date format information
const dateFormatShort = new Intl.DateTimeFormat('en-GB', {
    year: 'numeric',
    month: 'numeric',
    day: 'numeric',
    hour: 'numeric',
    minute: 'numeric',
    second: 'numeric',
    hour12: false,
});
// split character
const split_char = '\0;'
// global for our selected file we want to transmit
// ----------------- some chat globals
var filetype = '';
var file = '';
var filename = '';
var callsign_counter = 0;
var selected_callsign = '';
// -----------------------------------
var chatDB = path.join(configFolder, 'chatDB')
// ---- MessageDB
var PouchDB = require('pouchdb');
PouchDB.plugin(require('pouchdb-find'));
var db = new PouchDB(chatDB);
var dxcallsigns = new Set();
db.createIndex({
    index: {
        fields: ['timestamp', 'uuid', 'dxcallsign', 'dxgrid', 'msg', 'checksum', 'type', 'command', 'status', '_attachments']
    }
}).then(function(result) {
    // handle result
    console.log(result)
}).catch(function(err) {
    console.log(err);
});
db.find({
    selector: {
        timestamp: {
            $exists: true
        }
    },
    sort: [{
        'timestamp': 'asc'
    }]
}).then(function(result) {
    // handle result
    if (typeof(result) !== 'undefined') {
        result.docs.forEach(function(item) {
            console.log(item)
            update_chat(item);
        });
    }
}).catch(function(err) {
    console.log(err);
});
// WINDOW LISTENER
window.addEventListener('DOMContentLoaded', () => {
    document.querySelector('emoji-picker').addEventListener("emoji-click", (event) => {
        document.getElementById('chatModuleMessage').setRangeText(event.detail.emoji.unicode)
        console.log(event.detail);
    })
    document.getElementById("emojipickerbutton").addEventListener("click", () => {
        var element = document.getElementById("emojipickercontainer")
        console.log(element.style.display);
        if (element.style.display === "none") {
            element.style.display = "block";
        } else {
            element.style.display = "none";
        }
    })
    document.getElementById("delete_selected_chat").addEventListener("click", () => {
        db.find({
            selector: {
                dxcallsign: selected_callsign
            }
        }).then(function(result) {
            // handle result
            if (typeof(result) !== 'undefined') {
                result.docs.forEach(function(item) {
                    console.log(item)
                    db.get(item._id).then(function(doc) {
                        return db.remove(doc);
                    });
                    location.reload();
                    
                });
            }
        }).catch(function(err) {
            console.log(err);
        });
    })
    document.getElementById("selectFilesButton").addEventListener("click", () => {
        //document.getElementById('selectFiles').click();
        ipcRenderer.send('select-file', {
            title: 'Title',
        }); 
    })    
    
    document.getElementById("ping").addEventListener("click", () => {
        ipcRenderer.send('run-tnc-command', {
            command: 'ping', dxcallsign: selected_callsign
        }); 
    })
    
    
    document.addEventListener("keyup", function(event) {
    // Number 13 == Enter
        if (event.keyCode === 13) {
            // Cancel the default action, if needed
            event.preventDefault();
            // Trigger the button element with a click
            document.getElementById("sendMessage").click();
        }
    }); 



    // NEW CHAT
    

    document.getElementById("createNewChatButton").addEventListener("click", () => {
        var dxcallsign = document.getElementById('chatModuleNewDxCall').value;
        var uuid = uuidv4()
db.post({
            
            _id: uuid,
            timestamp: Math.floor(Date.now() / 1000),
            dxcallsign: dxcallsign.toUpperCase(),
            dxgrid: '---',
            msg: 'NULL',
            checksum: 'NULL',
            type: 'newchat',
            status: 'NULL',
            uuid: uuid
            
        }).then(function(response) {
            // handle response
            console.log("new database entry");
            console.log(response);
        }).catch(function(err) {
            console.log(err);
        });
        db.get(uuid, [{
            attachments: true
        }]).then(function(doc) {
            // handle doc
            update_chat(doc)
        }).catch(function(err) {
            console.log(err);
        });
    });
    
    // SEND MSG
    document.getElementById("sendMessage").addEventListener("click", () => {
        document.getElementById('emojipickercontainer').style.display = "none";
        
        var dxcallsign = selected_callsign.toUpperCase();
        var chatmessage = document.getElementById('chatModuleMessage').value;
        console.log(file);
        console.log(filename);
        console.log(filetype);
        var data_with_attachment = chatmessage + split_char + filename + split_char + filetype + split_char + file;
        document.getElementById('selectFilesButton').innerHTML = `
    <i class="bi bi-paperclip" style="font-size: 1.2rem; color: white;"></i> 
    `;
        var uuid = uuidv4();
        console.log(data_with_attachment)
        let Data = {
            command: "send_message",
            dxcallsign: dxcallsign,
            mode: 255,
            frames: 1,
            data: data_with_attachment,
            checksum: '123',
            uuid: uuid
        };
        ipcRenderer.send('run-tnc-command', Data);
        db.post({
            _id: uuid,
            timestamp: Math.floor(Date.now() / 1000),
            dxcallsign: dxcallsign,
            dxgrid: 'NULL',
            msg: chatmessage,
            checksum: 'NULL',
            type: "transmit",
            status: 'transmit',
            uuid: uuid,
            _attachments: {
                [filename]: {
                    content_type: filetype,
                    data: btoa(file)
                }
            }
        }).then(function(response) {
            // handle response
            console.log("new database entry");
            console.log(response);
        }).catch(function(err) {
            console.log(err);
        });
        db.get(uuid, [{
            attachments: true
        }]).then(function(doc) {
            // handle doc
            update_chat(doc)
        }).catch(function(err) {
            console.log(err);
        });
        // scroll to bottom    
        var element = document.getElementById("message-container");
        element.scrollTo(0, element.scrollHeight);
        // clear input
        document.getElementById('chatModuleMessage').value = ''
    })
    // cleanup after transmission
    filetype = '';
    file = '';
    filename = '';
});
ipcRenderer.on('return-selected-files', (event, arg) => {
    filetype = arg.mime;
    file = arg.data;
    filename = arg.filename;
    document.getElementById('selectFilesButton').innerHTML = `
    <i class="bi bi-paperclip" style="font-size: 1.2rem; color: white;"></i>
     <span class="position-absolute top-0 start-100 translate-middle p-2 bg-danger border border-light rounded-circle">
        <span class="visually-hidden">New file selected</span>
     </span>   
    `;
});
ipcRenderer.on('action-update-transmission-status', (event, arg) => {
    console.log(arg.status);
    console.log(arg.uuid);
    db.get(arg.uuid, {
        attachments: true
    }).then(function(doc) {
        return db.put({
            _id: arg.uuid,
            _rev: doc._rev,
            timestamp: doc.timestamp,
            dxcallsign: doc.dxcallsign,
            dxgrid: doc.dxgrid,
            msg: doc.msg,
            checksum: doc.checksum,
            type: "transmit",
            status: arg.status,
            uuid: doc.uuid,
            _attachments: doc._attachments
        });
    }).then(function(response) {
        // handle response
        db.get(arg.uuid, [{
            attachments: true
        }]).then(function(doc) {
            // handle doc
            update_chat(doc);
        }).catch(function(err) {
            console.log(err);
        });
    }).catch(function(err) {
        console.log(err);
    });
});
ipcRenderer.on('action-new-msg-received', (event, arg) => {
    console.log(arg.data)
    var new_msg = arg.data;
    new_msg.forEach(function(item) {
        console.log(item)
        let obj = new Object();
        if (item.type == 'ping') {
            obj.timestamp = item.timestamp;
            obj.dxcallsign = item.dxcallsign;
            obj.dxgrid = item.dxgrid;
            obj.uuid = item.uuid;
            obj.command = 'ping';
            obj.checksum = 'null';
            obj.msg = 'null';
            obj.status = item.status;
            obj.snr = item.snr;
            obj.type = item.type;
            
            db.put({
                _id: obj.uuid,
                timestamp: obj.timestamp,
                uuid: obj.uuid,
                dxcallsign: obj.dxcallsign,
                dxgrid: obj.dxgrid,
                msg: obj.msg,
                checksum: obj.checksum,
                type: obj.type,
                command: obj.command,
                status: obj.status,
                snr: obj.snr,
            }).then(function(response) {
                console.log("new database entry");
                console.log(response);
            }).catch(function(err) {
                console.log(err);
            });
            
            db.get(item.uuid, {
                attachments: true
            }).then(function(doc) {
                console.log(doc)
                update_chat(doc);

            }).catch(function(err) {
                console.log(err);
            });
        } else if (item.type == 'beacon') {
            obj.timestamp = item.timestamp;
            obj.dxcallsign = item.dxcallsign;
            obj.dxgrid = item.dxgrid;
            obj.uuid = item.uuid;
            obj.command = 'beacon';
            obj.checksum = 'null';
            obj.msg = 'null';
            obj.status = item.status;
            obj.snr = item.snr;
            obj.type = item.type;
            
            db.put({
                _id: obj.uuid,
                timestamp: obj.timestamp,
                uuid: obj.uuid,
                dxcallsign: obj.dxcallsign,
                dxgrid: obj.dxgrid,
                msg: obj.msg,
                checksum: obj.checksum,
                type: obj.type,
                command: obj.command,
                status: obj.status,
                snr: obj.snr,
            }).then(function(response) {
                console.log("new database entry");
                console.log(response);
            }).catch(function(err) {
                console.log(err);
            });
            
            db.get(item.uuid, {
                attachments: true
            }).then(function(doc) {
                console.log(doc);
                update_chat(doc);
            }).catch(function(err) {
                console.log(err);
            });
        } else if (item.arq == 'received') {
            var encoded_data = atob(item.data);
            var splitted_data = encoded_data.split(split_char);
            obj.timestamp = item.timestamp;
            obj.dxcallsign = item.dxcallsign;
            obj.dxgrid = item.dxgrid;
            obj.command = splitted_data[1];
            obj.checksum = splitted_data[2];
            // convert message to unicode from utf8 because of emojis
            obj.uuid = utf8.decode(splitted_data[3]);
            obj.msg = utf8.decode(splitted_data[4]);
            obj.status = 'null';
            obj.snr = 'null';
            obj.type = 'received';
            obj.filename = utf8.decode(splitted_data[5]);
            obj.filetype = utf8.decode(splitted_data[6]);
            obj.file = btoa(utf8.decode(splitted_data[7]));
            db.put({
                _id: obj.uuid,
                timestamp: obj.timestamp,
                uuid: obj.uuid,
                dxcallsign: obj.dxcallsign,
                dxgrid: obj.dxgrid,
                msg: obj.msg,
                checksum: obj.checksum,
                type: obj.type,
                command: obj.command,
                status: obj.status,
                snr: obj.snr,
                _attachments: {
                    [obj.filename]: {
                        content_type: obj.filetype,
                        data: obj.file
                    }
                }
            }).then(function(response) {
                console.log("new database entry");
                console.log(response);
            }).catch(function(err) {
                console.log(err);
            });
            
            db.get(obj.uuid, {
                attachments: true
            }).then(function(doc) {
                console.log(doc);
                update_chat(doc);
            }).catch(function(err) {
                console.log(err);
            });
        }
    });
    //window.location = window.location;
});
// Update chat list
update_chat = function(obj) {
    //console.log(obj);
    var dxcallsign = obj.dxcallsign;
    var timestamp = dateFormat.format(obj.timestamp * 1000);
    var timestampShort = dateFormatShort.format(obj.timestamp * 1000);
    var dxgrid = obj.dxgrid;
    try {
        console.log(Object.keys(obj._attachments)[0].length)
        if (typeof(obj._attachments) !== 'undefined' && Object.keys(obj._attachments)[0].length > 0) {
            //var filename = obj._attachments;
            var filename = Object.keys(obj._attachments)[0]
            var filetype = filename.split('.')[1]
            var filesize = obj._attachments[filename]["length"] + " Bytes";
            var fileheader = `
        <div class="card-header text-end p-0 mb-0 hover-overlay" id="save-file-msg-${obj._id}">
       <p class="text-right mb-0 p-1 text-black" style="text-align: right; font-size : 1rem">
                    
                    <span class="badge bg-secondary text-white p-1">${filename}</span>
                    <span class="badge bg-secondary text-white p-1">${filesize}</span>
                            <i class="bi bi-filetype-${filetype}" style="font-size: 3rem; color: black;"></i> 
                        </p>
        </div>
        `;
        } else {
            var filename = ''
            var fileheader = ''
        }
    } catch {
        console.log("error with database parsing...")
    }
    // CALLSIGN LIST
    if (!(document.getElementById('chat-' + dxcallsign + '-list'))) {
        // increment callsign counter
        callsign_counter++;
        if (callsign_counter == 1) {
            var callsign_selected = 'active show'
            //document.getElementById('chatModuleDxCall').value = dxcallsign;
            selected_callsign = dxcallsign;
        }
        var new_callsign = `
            <a class="list-group-item list-group-item-action rounded-4 rounded-top rounded-bottom border-1 mb-2 ${callsign_selected}" id="chat-${dxcallsign}-list" data-bs-toggle="list" href="#chat-${dxcallsign}" role="tab" aria-controls="chat-${dxcallsign}">
                      
                     
                      
                      <div class="d-flex w-100 justify-content-between">
                          <div class="rounded-circle p-0">
                            <i class="bi bi-person-circle p-1" style="font-size:2rem;"></i>
                          </div>
                        <h5 class="mb-1">${dxcallsign}</h5>
                        <small>${dxgrid}</small>
                      </div>
                      <!--<p class="mb-1">JN48ea</p>-->
                  </a>

            `;
        document.getElementById('list-tab').insertAdjacentHTML("beforeend", new_callsign);
        var message_area = `
            <div class="tab-pane fade ${callsign_selected}" id="chat-${dxcallsign}" role="tabpanel" aria-labelledby="chat-${dxcallsign}-list"></div>  
            `;
        document.getElementById('nav-tabContent').insertAdjacentHTML("beforeend", message_area);
        // create eventlistener for listening on clicking on a callsign
        document.getElementById('chat-' + dxcallsign + '-list').addEventListener('click', function() {
            //document.getElementById('chatModuleDxCall').value = dxcallsign;
            selected_callsign = dxcallsign;
            // scroll to bottom    
            var element = document.getElementById("message-container");
            element.scrollTo(0, element.scrollHeight);
        });
    }
    // APPEND MESSAGES TO CALLSIGN
    if (obj.status == 'transmit') {
        var status = '<i class="bi bi-check" style="font-size:1rem;"></i>';
    } else if (obj.status == 'transmitting') {
        var status = '<i class="bi bi-arrow-left-right" style="font-size:1rem;"></i>';
    } else if (obj.status == 'failed') {
        var status = '<i class="bi bi-exclamation-circle" style="font-size:1rem;"></i>';
    } else if (obj.status == 'success') {
        var status = '<i class="bi bi-check-all" style="font-size:1rem;"></i>';
    } else {
        var status = '<i class="bi bi-question" style="font-size:1rem;"></i>';
    }
    if (!(document.getElementById('msg-' + obj._id))) {
        if (obj.type == 'ping') {
            var new_message = `
                <div class="m-1 p-0 rounded-pill w-100 bg-secondary bg-gradient" id="msg-${obj._id}">         
                    <p class="text-small text-white mb-0 text-break"><i class="m-3 bi bi-arrow-left-right"></i>snr: ${obj.snr} - ${timestamp}     </p>
                </div>
            `;
        }
        if (obj.type == 'beacon') {
            var new_message = `
                <div class="m-1 p-0 rounded-pill w-100 bg-info bg-gradient" id="msg-${obj._id}">         
                    <p class="text-small text-white text-break"><i class="m-3 bi bi-broadcast"></i>snr: ${obj.snr} - ${timestamp}     </p>
                </div>
            `;
        }
        
        if (obj.type == 'newchat') {
            var new_message = `
                <div class="m-1 p-0 rounded-pill w-100 bg-light bg-gradient" id="msg-${obj._id}">         
                    <p class="text-small text-dark text-break"><i class="m-3 bi bi-file-earmark-plus"></i> new chat openend - ${timestamp}     </p>
                </div>
            `;
        }
        
        
        
        
        if (obj.type == 'received') {
            var new_message = `
                    <div class="mt-3   rounded-3 mb-0 w-75" id="msg-${obj._id}">            
                    <!--<p class="font-monospace text-small mb-0 text-muted text-break">${timestamp}</p>-->
                    <div class="card border-light bg-light" id="msg-${obj._id}">
                      ${fileheader}
                      <div class="card-body p-0">
                        <p class="card-text p-2 mb-0 text-break text-wrap">${obj.msg}</p>
                        <p class="text-right mb-0 p-1 text-white" style="text-align: left; font-size : 0.9rem">
                            <span class="badge bg-light text-muted">${timestamp}</span>  
                            
                        </p>
                      </div>
                    </div>
                </div>
                `;
        }
        if (obj.type == 'transmit') {
            var new_message = `
                <div class="ml-auto  rounded-3 mt-3 mb-0 w-75" style="margin-left: auto;">
                    <!--<p class="font-monospace text-right mb-0 text-muted" style="text-align: right;">${timestamp}</p>-->
                    <div class="card" id="msg-${obj._id}">
                    ${fileheader}
                      <div class="card-body p-0 text-right bg-primary">
                        <p class="card-text p-2 mb-0 text-white text-break text-wrap">${obj.msg}</p>
                        <p class="text-right mb-0 p-1 text-white" style="text-align: right; font-size : 0.9rem">
                            <span class="text-light" style="font-size: 0.7rem;">${timestamp} - </span>  
                            <span class=" text-white" style="font-size:0.8rem;">${status}</span>

                            <button type="button" id="retransmit-msg-${obj._id}" class="btn btn-sm btn-light p-0" style="height:20px;width:30px"><i class="bi bi-arrow-repeat" style="font-size: 0.9rem; color: black;"></i></button>
                            
                        </p>
                      </div>
                    </div>
                    
                </div>
                `;
        }
        // CHECK CHECK CHECK --> This could be done better
        var id = "chat-" + obj.dxcallsign
        document.getElementById(id).insertAdjacentHTML("beforeend", new_message);
        
        var element = document.getElementById("message-container");
        element.scrollTo(0, element.scrollHeight);
        
    } else if (document.getElementById('msg-' + obj._id)) {
        id = "msg-" + obj._id;
        //document.getElementById(id).className = message_class;
    }
    // CREATE SAVE TO FOLDER EVENT LISTENER
    if (document.getElementById('save-file-msg-' + obj._id) && !document.getElementById('save-file-msg-' + obj._id).hasAttribute('listenerOnClick')) {
    
        // set Attribute to determine if we already created an EventListener for this element
        document.getElementById('save-file-msg-' + obj._id).setAttribute('listenerOnClick', 'true');
        
        document.getElementById('save-file-msg-' + obj._id).addEventListener("click", () => {
            saveFileToFolder(obj._id)
        });
        document.getElementById('save-file-msg-' + obj._id).addEventListener("mouseover", () => {
            document.getElementById('save-file-msg-' + obj._id).style.backgroundColor = "rgba(0,0,0,.1)";
        });
        document.getElementById('save-file-msg-' + obj._id).addEventListener("mouseleave", () => {
            document.getElementById('save-file-msg-' + obj._id).style.backgroundColor = "rgba(0,0,0,.03)";
        });
    }
    // CREATE RESEND MSG EVENT LISTENER
    // check if element exists and if we already created NOT created an event listener
    if (document.getElementById('retransmit-msg-' + obj._id) && !document.getElementById('retransmit-msg-' + obj._id).hasAttribute('listenerOnClick')) {

        document.getElementById('retransmit-msg-' + obj._id).addEventListener("click", () => {
            // set Attribute to determine if we already created an EventListener for this element
            document.getElementById('retransmit-msg-' + obj._id).setAttribute('listenerOnClick', 'true');
        
        
            db.get(obj._id, {
                attachments: true
            }).then(function(doc) {
                // handle doc
                console.log(doc)
                var filename = Object.keys(obj._attachments)[0]
                var filetype = obj._attachments[filename]["content_type"]
                //var file = atob(obj._attachments[filename]["data"])
                db.getAttachment(obj._id, filename).then(function(data) {
                    console.log(data)
                    var file = atob(data)
                    var data_with_attachment = doc.msg + split_char + filename + split_char + filetype + split_char + file;
                    let Data = {
                        command: "send_message",
                        dxcallsign: doc.dxcallsign,
                        mode: 255,
                        frames: 1,
                        data: data_with_attachment,
                        checksum: doc.checksum,
                        uuid: doc.uuid
                    };
                    console.log(Data)
                    ipcRenderer.send('run-tnc-command', Data);
                });
            }).catch(function(err) {
                console.log(err);
            });
        });

    };
    //window.location = window.location
}

function getObjByID(id) {
    /*      
        {
    "timestamp": 1648139683,
    "dxcallsign": "DN2LS-0",
    "dxgrid": "NULL",
    "msg": "",
    "checksum": "NULL",
    "type": "transmit",
    "status": "transmit",
    "uuid": "5b72a46c-49cf-40d6-8936-a64c95bc3da7",
    "_attachments": {
        "CMakeLists.txt": {
            "content_type": "text/plain",
            "digest": "md5-Cdk6Ol6uuJ7Gj5lin9o4SQ==",
            "length": 7802,
            "revpos": 1,
            "stub": true
        }
    },
    "_id": "5b72a46c-49cf-40d6-8936-a64c95bc3da7",
    "_rev": "1-6df2d7227c4f89f8a3a2b4978661dd79"
}
**/
    db.get(id, {
        attachments: true
    }).then(function(doc) {
        return obj
    }).catch(function(err) {
        console.log(err);
        return false
    });
}

function saveFileToFolder(id) {
    db.get(id, {
        attachments: true
    }).then(function(obj) {
        console.log(obj)
        console.log(Object.keys(obj._attachments)[0].content_type)
        var filename = Object.keys(obj._attachments)[0]
        var filetype = filename.content_type
        var file = filename.data
        console.log(file)
        console.log(filename.data)
        db.getAttachment(id, filename).then(function(data) {
            // handle result
            console.log(data.length)
            //data = new Blob([data.buffer], { type: 'image/png' } /* (1) */) 
            console.log(data)
            let Data = {
                file: data,
                filename: filename,
                filetype: filetype,
            }
            console.log(Data)
            ipcRenderer.send('save-file-to-folder', Data);
        }).catch(function(err) {
            console.log(err);
            return false
        });
    }).catch(function(err) {
        console.log(err);
    });
}