import { app } from "../../scripts/app.js";
import { api } from "../../scripts/api.js";

app.registerExtension({
    name: "json.manager.project.source",

    async beforeRegisterNodeDef(nodeType, nodeData, app) {
        if (nodeData.name !== "ProjectSource") return;

        // Helper: replace a STRING widget with a proper combo widget
        function replaceWithCombo(node, name, values, callback) {
            const idx = node.widgets?.findIndex(w => w.name === name);
            if (idx === -1 || idx === undefined) return null;
            const oldWidget = node.widgets[idx];
            const savedValue = oldWidget.value || "";
            const comboValues = values.length > 0 ? values : [""];
            // Always preserve saved value (may not be in list yet)
            if (savedValue && !comboValues.includes(savedValue)) {
                comboValues.unshift(savedValue);
            }
            const defaultValue = savedValue || comboValues[0];
            node.widgets.splice(idx, 1);
            const combo = node.addWidget("combo", name, defaultValue, callback, { values: comboValues });
            if (node.widgets.length > 1) {
                node.widgets.splice(node.widgets.length - 1, 1);
                node.widgets.splice(idx, 0, combo);
            }
            return combo;
        }

        // Fetch file list from API and update file_name combo
        async function refreshFiles(node) {
            const urlW = node.widgets?.find(w => w.name === "manager_url");
            const projW = node.widgets?.find(w => w.name === "project_name");
            if (!urlW?.value || !projW?.value) return;

            try {
                const resp = await api.fetchApi(
                    `/json_manager/list_project_files?url=${encodeURIComponent(urlW.value)}&project=${encodeURIComponent(projW.value)}`
                );
                if (!resp.ok) return;
                const data = await resp.json();
                const fileList = (data.files || []).map(f => f.name || f);
                console.log(`[ProjectSource] refreshFiles: got ${fileList.length} files:`, fileList);

                const fileW = node.widgets?.find(w => w.name === "file_name");
                if (fileW) {
                    const currentValue = fileW.value;
                    fileW.options.values = fileList.length > 0 ? fileList : [""];
                    // Keep current selection if still valid
                    if (currentValue && fileList.includes(currentValue)) {
                        fileW.value = currentValue;
                    }
                }
            } catch (e) {
                console.error("[ProjectSource] Failed to refresh files:", e);
            }
        }

        // Notify all ProjectKey nodes referencing this source to re-sync
        function notifyRelays(sourceNode) {
            if (!sourceNode.graph?._nodes) return;
            const labelW = sourceNode.widgets?.find(w => w.name === "label");
            if (!labelW?.value) return;
            console.log(`[ProjectSource] notifyRelays: label="${labelW.value}", scanning ${sourceNode.graph._nodes.length} nodes`);
            let matched = 0;
            for (const node of sourceNode.graph._nodes) {
                if (node.type === "ProjectKey" && node._syncFromSource && node._refreshKeys) {
                    const srcW = node.widgets?.find(w => w.name === "source_label");
                    console.log(`[ProjectSource]   ProjectKey id=${node.id} source_label="${srcW?.value}"`);
                    if (srcW?.value === labelW.value) {
                        matched++;
                        node._syncFromSource();
                        node._refreshKeys();
                    }
                }
            }
            console.log(`[ProjectSource] notifyRelays: matched ${matched} relays`);
        }

        const origOnNodeCreated = nodeType.prototype.onNodeCreated;
        nodeType.prototype.onNodeCreated = function () {
            origOnNodeCreated?.apply(this, arguments);

            const node = this;

            // Replace file_name STRING with a combo
            replaceWithCombo(this, "file_name", [], function (value) {
                notifyRelays(node);
            });

            // Hook manager_url and project_name to refresh file list + notify relays
            for (const name of ["manager_url", "project_name"]) {
                const w = this.widgets?.find(w => w.name === name);
                if (w) {
                    const origCb = w.callback;
                    w.callback = function (...args) {
                        origCb?.apply(this, args);
                        refreshFiles(node);
                        notifyRelays(node);
                    };
                }
            }

            // Hook sequence_number to notify relays
            const seqW = this.widgets?.find(w => w.name === "sequence_number");
            if (seqW) {
                const origCb = seqW.callback;
                seqW.callback = function (...args) {
                    origCb?.apply(this, args);
                    notifyRelays(node);
                };
            }

            // Update title when label changes
            const labelWidget = this.widgets?.find(w => w.name === "label");
            if (labelWidget) {
                const origCallback = labelWidget.callback;
                labelWidget.callback = function (...args) {
                    origCallback?.apply(this, args);
                    node.title = labelWidget.value
                        ? `Source: ${labelWidget.value}`
                        : "Project Source";
                    app.graph?.setDirtyCanvas(true, true);
                };
                // Set initial title
                if (labelWidget.value) {
                    this.title = `Source: ${labelWidget.value}`;
                }
            }
        };

        const origOnConfigure = nodeType.prototype.onConfigure;
        nodeType.prototype.onConfigure = function (info) {
            origOnConfigure?.apply(this, arguments);

            // Ensure file_name is a combo (may be STRING from serialization)
            const fileW = this.widgets?.find(w => w.name === "file_name");
            if (fileW && fileW.type !== "combo") {
                const node = this;
                replaceWithCombo(this, "file_name", [], function (value) {
                    notifyRelays(node);
                });
            }

            const labelWidget = this.widgets?.find(w => w.name === "label");
            if (labelWidget?.value) {
                this.title = `Source: ${labelWidget.value}`;
            }

            // Deferred: refresh file list once graph is ready
            const node = this;
            queueMicrotask(() => {
                refreshFiles(node);
            });
        };
    },
});