// file: crates/ksp-app-config-desk/frontend/ts/main.ts
// version: 6

import "bootstrap";
import ResizeObserver from "resize-observer-polyfill";
import "simplebar";
import { getCurrentWindow } from "@tauri-apps/api/window";
import type { AppSnapshotDto } from "./bindings/ksp_app_config_desk/dto_common/AppSnapshotDto.ts";
import { frontendDebug, frontendInfo, frontendTrace, installFrontendConsoleBridge } from "./frontend_log";
import { initializeDocumentsPanel } from "./documents";
import { initializeEnvironmentPanel } from "./environment";
import { initializeProfilesPanel } from "./profiles";
import { invokeKsp } from "./invoke";

(window as Window & typeof globalThis & { ResizeObserver?: typeof ResizeObserver }).ResizeObserver = ResizeObserver;
installFrontendConsoleBridge("main");

type ViewId = "overview" | "documents" | "profiles" | "environment" | "logging";

const viewCopy: Record<ViewId, { title: string; description: string }> = {
    overview: {
        title: "Vue d'ensemble",
        description: "État sûr du bootstrap Config Desk et du runtime Logging actuellement actif.",
    },
    documents: {
        title: "Documents",
        description: "Inventaire, diagnostics et réparation validée des documents Config enregistrés.",
    },
    profiles: {
        title: "Profils",
        description: "Sélection default/explicite, vues global/profil/effective sûre et provenance Config.",
    },
    environment: {
        title: "Environnement / .env",
        description: "Rapport sûr desired/effective/source/shadow des variables KSP/KSPB ; mutations .env prévues en pre.012.",
    },
    logging: {
        title: "Logging",
        description: "Édition des profils et hot reload du runtime Logging — surfaces fonctionnelles prévues en pre.014 à pre.017.",
    },
};

function isViewId(value: string): value is ViewId {
    return Object.prototype.hasOwnProperty.call(viewCopy, value);
}

function activateView(viewId: ViewId, source: "startup" | "user"): void {
    if (source === "user") {
        frontendDebug("main", "Main navigation activated", { viewId });
    }
    const copy = viewCopy[viewId];
    const title = document.querySelector<HTMLElement>("#viewTitle");
    const headerTitle = document.querySelector<HTMLElement>("#headerViewTitle");
    const description = document.querySelector<HTMLElement>("#viewDescription");
    if (title) {
        title.textContent = copy.title;
    }
    if (headerTitle) {
        headerTitle.textContent = copy.title;
    }
    document.title = `Config Desk — ${copy.title}`;
    if (description) {
        description.textContent = copy.description;
    }
    document.querySelectorAll<HTMLButtonElement>("[data-view]").forEach(button => {
        const active = button.dataset.view === viewId;
        button.classList.toggle("active", active);
        button.setAttribute("aria-current", active ? "page" : "false");
    });
    frontendTrace("main", "Main navigation tab state changed", { viewId, source });
    const overview = document.querySelector<HTMLElement>("#overviewPanel");
    if (overview) {
        overview.hidden = viewId !== "overview";
    }
    const documents = document.querySelector<HTMLElement>("#documentsPanel");
    if (documents) {
        documents.hidden = viewId !== "documents";
    }
    const profiles = document.querySelector<HTMLElement>("#profilesPanel");
    if (profiles) {
        profiles.hidden = viewId !== "profiles";
    }
    const environment = document.querySelector<HTMLElement>("#environmentPanel");
    if (environment) {
        environment.hidden = viewId !== "environment";
    }
    const placeholder = document.querySelector<HTMLElement>("#placeholderPanel");
    if (placeholder) {
        placeholder.hidden = viewId !== "logging";
    }
    frontendTrace("main", "Main view DOM updated", { viewId, source });
}

function bindNavigation(): void {
    document.querySelectorAll<HTMLButtonElement>("[data-view]").forEach(button => {
        button.addEventListener("click", () => {
            const requestedView = button.dataset.view;
            frontendTrace("main", "Main navigation tab clicked", { requestedView: requestedView ?? null });
            if (requestedView && isViewId(requestedView)) {
                activateView(requestedView, "user");
            }
        });
    });
    frontendTrace("main", "Main navigation handlers installed");
}

function renderSnapshot(snapshot: AppSnapshotDto): void {
    const version = document.querySelector<HTMLElement>("#overviewVersion");
    const documents = document.querySelector<HTMLElement>("#overviewDocuments");
    const profile = document.querySelector<HTMLElement>("#overviewLoggingProfile");
    const generation = document.querySelector<HTMLElement>("#overviewLoggingGeneration");
    const fallback = document.querySelector<HTMLElement>("#overviewLoggingFallback");
    if (version) {
        version.textContent = snapshot.applicationVersion;
    }
    if (documents) {
        documents.textContent = snapshot.configDocumentCount.toString();
    }
    if (profile) {
        profile.textContent = snapshot.activeLoggingProfile ?? "fallback transitoire";
    }
    if (generation) {
        generation.textContent = snapshot.loggingGeneration.toString();
    }
    if (fallback) {
        fallback.textContent = snapshot.fallbackLoggingActive ? "oui" : "non";
    }
    frontendTrace("main", "Application snapshot rendered", {
        loggingGeneration: snapshot.loggingGeneration,
        fallbackLoggingActive: snapshot.fallbackLoggingActive,
    });
}

async function loadSnapshot(): Promise<void> {
    const status = document.querySelector<HTMLElement>("#shellStatus");
    const snapshot = await invokeKsp<AppSnapshotDto>("main", "get_app_snapshot");
    renderSnapshot(snapshot);
    if (status) {
        status.textContent = "Shell principal prêt.";
    }
    frontendTrace("main", "Main shell status replaced", { status: "ready" });
}

async function initializeMain(): Promise<void> {
    const windowLabel = getCurrentWindow().label;
    frontendInfo("main", "Config Desk main frontend loaded", { windowLabel });
    bindNavigation();
    initializeDocumentsPanel();
    initializeProfilesPanel();
    initializeEnvironmentPanel();
    activateView("overview", "startup");
    try {
        await loadSnapshot();
    } catch {
        const status = document.querySelector<HTMLElement>("#shellStatus");
        if (status) {
            status.textContent = "Le snapshot initial n'a pas pu être chargé.";
        }
        frontendTrace("main", "Main shell status replaced", { status: "snapshot_error" });
    }
}

document.addEventListener("DOMContentLoaded", () => {
    void initializeMain();
});