let selectedMeetings = [];
let currentURL = null;

function toggleDropdown() {
    const dropdown = document.getElementById("dropdownContent");
    dropdown.style.display = (dropdown.style.display === "none") ? "block" : "none";
}

document.getElementById('dropbtn').addEventListener('click', () => {
    toggleDropdown()
})
document.addEventListener('mousedown', (e) => {
    if (document.getElementById("dropdownContent").style.display == "block" && e.target.className != "dropdown-content" && e.target.tagName != "INPUT" && e.target.tagName != "LABEL") {
        document.getElementById("dropdownContent").style.display = "none";
    }
})

document.getElementById('tdocs-wg-option').addEventListener('change', async (e) => {
    let wg = e.target.value;
    const dropdownContent = document.getElementById('dropdownContent');
    const dropbtn = document.getElementById('dropbtn');

    if (wg != "ALL") {
        dropdownContent.innerHTML = '<label style="display:none;"><input type="checkbox" checked value="ALL">Index all meetings</label>';
        const response = await fetch(`/get_meetings/${wg}`, {
            method: "GET"
        });
        const responseJson = await response.json();
        const meetings = responseJson.meetings;
        currentURL = responseJson.url;

        for (const meet of meetings) {
            const label = document.createElement('label');
            const checkbox = document.createElement('input');
            checkbox.type = "checkbox";
            checkbox.value = meet;
            label.appendChild(checkbox);
            label.appendChild(document.createTextNode(meet));
            dropdownContent.appendChild(label);
            dropdownContent.appendChild(document.createElement('br'));
        }
        dropbtn.removeAttribute('disabled');

        // après création, ajoute les listeners de gestion sur chaque checkbox
        initCheckboxListeners();
        // Initialise l'état initial
        updateDropbtnLabel();
    } else {
        dropdownContent.innerHTML = '<label style="display:none;"><input type="checkbox" checked value="ALL">Index all meetings</label>';
        dropbtn.setAttribute('disabled', 'true');
        dropbtn.textContent = "Index all meetings";
    }
});

function disableButtons() {
    document.getElementById("spec-3gpp-btn").setAttribute('disabled', 'disabled')
    document.getElementById("spec-etsi-btn").setAttribute('disabled', 'disabled')
    document.getElementById("tdocs-btn").setAttribute('disabled', 'disabled')
}

function enableButtons() {
    document.getElementById("spec-3gpp-btn").removeAttribute('disabled')
    document.getElementById("spec-etsi-btn").removeAttribute('disabled')
    document.getElementById("tdocs-btn").removeAttribute('disabled')
}

function initCheckboxListeners() {
    const dropdownContent = document.getElementById('dropdownContent');
    const dropbtn = document.getElementById('dropbtn');

    function updateState() {
        const checkboxes = dropdownContent.querySelectorAll('input[type="checkbox"]');
        const allCheckbox = dropdownContent.querySelector('input[value="ALL"]');
        const checkedBoxes = Array.from(checkboxes).filter(cb => cb.checked && cb !== allCheckbox);

        if (checkedBoxes.length === 0) {
            allCheckbox.checked = true;
            dropbtn.textContent = "Index all meetings";
            selectedMeetings = ["ALL"];
        } else {
            if (allCheckbox.checked) {
                allCheckbox.checked = false; // décocher ALL si autre(s) cochée(s)
            }
            if (checkedBoxes.length === 1) {
                dropbtn.textContent = checkedBoxes[0].value;
            } else {
                dropbtn.textContent = `${checkedBoxes.length} meetings sélectionnés`;
            }
            selectedMeetings = checkedBoxes.map(cb => cb.value);
        }

        console.log(selectedMeetings);
        console.log(currentURL);
    }

    const checkboxes = dropdownContent.querySelectorAll('input[type="checkbox"]');
    checkboxes.forEach(cb => cb.addEventListener('change', updateState));

    updateState(); // mise à jour initiale
}

function updateDropbtnLabel() {
    const dropdownContent = document.getElementById('dropdownContent');
    const checkboxes = dropdownContent.querySelectorAll('input[type="checkbox"]');
    const allCheckbox = dropdownContent.querySelector('input[value="ALL"]');
    const dropbtn = document.getElementById('dropbtn');
    const checkedBoxes = Array.from(checkboxes).filter(cb => cb.checked && cb !== allCheckbox);

    if (checkedBoxes.length === 0) {
        allCheckbox.checked = true;
        dropbtn.textContent = "Index all meetings";
    } else if (checkedBoxes.length === 1) {
        allCheckbox.checked = false;
        dropbtn.textContent = checkedBoxes[0].value;
    } else {
        allCheckbox.checked = false;
        dropbtn.textContent = `${checkedBoxes.length} meetings sélectionnés`;
    }
}
const progress = document.getElementById('indexProgression')

document.getElementById('tdocs-btn').addEventListener('click', async () => {
    disableButtons()
    let response = null;
    if (currentURL) {
        if (!selectedMeetings.includes("ALL")) {
            response = await fetch("/index_tdocs/meeting", {
                method: "POST",
                body: JSON.stringify({
                    wg: document.getElementById("tdocs-wg-option").value,
                    meetings: selectedMeetings
                }),
                headers: {
                    "Content-Type": "application/json",
                    "Accept": "text/event-stream",
                },
            });
        } else {
            response = await fetch("/index_tdocs/working_group", {
                method: "POST",
                body: JSON.stringify({
                    wg: document.getElementById("tdocs-wg-option").value
                }),
                headers: {
                    "Content-Type": "application/json",
                    "Accept": "text/event-stream",
                },
            });
        }
    } else {
        response = await fetch("/index_tdocs/all", {
            method: "POST",
            headers: {
                "Content-Type": "application/json",
                "Accept": "text/event-stream",
            },
        });
    }

    const reader = response.body.getReader();
    const decoder = new TextDecoder("utf-8");
    let buffer = "";

    while (true) {
        const {
            done,
            value
        } = await reader.read();
        if (done) break;

        buffer += decoder.decode(value, {
            stream: true
        });

        let events = buffer.split("\n\n"); // séparer les événements
        buffer = events.pop(); // garder le reste pour le prochain chunk

        for (const rawEvent of events) {
            const event = {};
            rawEvent.split("\n").forEach((line) => {
                const [key, ...rest] = line.split(":");
                if (key) event[key.trim()] = rest.join(":").trim();
            });

            // dispatch selon event.event ou par défaut message
            switch (event.event) {
                case "progress":
                    console.log("[progress]", event.data);
                    progress.value = event.data;
                    break;
                case "get-maximum":
                    console.log("[new-max]", event.data);
                    progress.max = event.data
                    break;
                case "info":
                    console.log("[info]", event.data);
                    document.getElementById('infoText').textContent = event.data
                    break;
                case "end":
                    console.log("[end]", event.data);
                    document.getElementById('infoText').textContent = event.data;
                    break;
                default:
                    if (event.data) {
                        console.log("[message]", event.data);
                    };
            }
        }
    }

    enableButtons()
});

document.getElementById('spec-3gpp-btn').addEventListener('click', async () => {
    disableButtons()
    const response = await fetch("/index_specs/3gpp", {method: "POST", headers: {
                    "Content-Type": "application/json",
                    "Accept": "text/event-stream",
                }});
    const reader = response.body.getReader();
    const decoder = new TextDecoder("utf-8");
    let buffer = "";

    while (true) {
        const {
            done,
            value
        } = await reader.read();
        if (done) break;

        buffer += decoder.decode(value, {
            stream: true
        });

        let events = buffer.split("\n\n"); // séparer les événements
        buffer = events.pop(); // garder le reste pour le prochain chunk

        for (const rawEvent of events) {
            const event = {};
            rawEvent.split("\n").forEach((line) => {
                const [key, ...rest] = line.split(":");
                if (key) event[key.trim()] = rest.join(":").trim();
            });

            // dispatch selon event.event ou par défaut message
            switch (event.event) {
                case "progress":
                    console.log("[progress]", event.data);
                    progress.value = event.data;
                    break;
                case "get-maximum":
                    console.log("[new-max]", event.data);
                    progress.max = event.data
                    break;
                case "info":
                    console.log("[info]", event.data);
                    document.getElementById('infoText').textContent = event.data
                    break;
                case "end":
                    console.log("[end]", event.data);
                    document.getElementById('infoText').textContent = event.data;
                    break;
                default:
                    if (event.data) {
                        console.log("[message]", event.data);
                    };
            }
        }
    }

    enableButtons()
});

document.getElementById('spec-etsi-btn').addEventListener('click', async () => {
    disableButtons()
    const response = await fetch("/index_specs/etsi", {method: "POST", headers: {
                    "Content-Type": "application/json",
                    "Accept": "text/event-stream",
                }});
    const reader = response.body.getReader();
    const decoder = new TextDecoder("utf-8");
    let buffer = "";

    while (true) {
        const {
            done,
            value
        } = await reader.read();
        if (done) break;

        buffer += decoder.decode(value, {
            stream: true
        });

        let events = buffer.split("\n\n"); // séparer les événements
        buffer = events.pop(); // garder le reste pour le prochain chunk

        for (const rawEvent of events) {
            const event = {};
            rawEvent.split("\n").forEach((line) => {
                const [key, ...rest] = line.split(":");
                if (key) event[key.trim()] = rest.join(":").trim();
            });

            // dispatch selon event.event ou par défaut message
            switch (event.event) {
                case "progress":
                    console.log("[progress]", event.data);
                    progress.value = event.data;
                    break;
                case "get-maximum":
                    console.log("[new-max]", event.data);
                    progress.max = event.data
                    break;
                case "info":
                    console.log("[info]", event.data);
                    document.getElementById('infoText').textContent = event.data
                    break;
                case "end":
                    console.log("[end]", event.data);
                    document.getElementById('infoText').textContent = event.data;
                    break;
                default:
                    if (event.data) {
                        console.log("[message]", event.data);
                    };
            }
        }
    }

    enableButtons()
});