import { autoResize, placeCursorAtEnd } from './utils.js'
import { createNewPage } from './page.js';

function applyBlocType(bloc, type, extra = {}) {
    bloc.dataset.type = type;

    let metadata = {};

    switch (type) {
        case "TEXTE":
            metadata = {};
            break;
        case "TITRE":
            metadata = { level: extra.level || 1 };
            break;
        case "LISTE":
            metadata = { style: extra.style || "bullet" };
            break;
        case "CODE":
            metadata = { language: extra.language || "plaintext", theme: "light" };
            break;
        case "PAGE":
            metadata = {
                pageId: extra.pageId || "nouvelle-page-id",
                title: extra.title || "Nouvelle page"
            };
            break;
        case "SEPARATEUR":
            metadata = {};
            break;
        case "CITATION":
            metadata = {
                type: extra.type || "normal"
            };
            break;
        default:
            console.warn("Type de bloc inconnu :", type);
    }

    setBlocMetadata(bloc, metadata);
    renderBlocStyle(bloc);
}

export function renderBlocStyle(bloc) {
    if (!bloc || !bloc.dataset) return;

    clearBlocStyles(bloc);

    const type = bloc.dataset.type || 'TEXTE';

    switch (type) {
        case 'TEXTE':
            bloc.classList.add('is-text');
            break;

        case 'TITRE':
            const metadata = getBlocDataMetadata(bloc);
            const level = metadata.level || '1';
            bloc.classList.add('is-title', `is-title-${level}`);
            break;

        case 'LISTE':
            renderListe(bloc);
            bloc.classList.add('is-list');
            break;

        case 'CODE':
            bloc.classList.add('is-code-block');
            bloc.style.whiteSpace = "pre";
            bloc.dataset.language || 'plaintext';
            break;

        case 'PAGE':
            bloc.classList.add('is-page-link');
            break;

        case 'SEPARATEUR':
            bloc.classList.add('is-separator');
            bloc.contentEditable = "false";
            break;

        case "CITATION":
            const metadataCitation = getBlocDataMetadata(bloc);
            const citationType = metadataCitation.type || 'normal';
            bloc.classList.add('is-quote', `is-quote-${citationType}`);
            break;

        default:
            bloc.classList.add('is-text');
            break;
    }

    autoResize(bloc);
}

export function clearBlocStyles(bloc) {
    bloc.classList.remove(
        'is-title', 'is-title-1', 'is-title-2', 'is-title-3',
        'is-quote', 'is-quote-info', 'is-quote-warning', 'is-quote-normal',
        'is-code-block', 'is-list', 'is-page-link', 'is-separator', 'is-text'
    );
    bloc.style.whiteSpace = "normal";
}

export function renderListe(bloc) {
    const metadata = getBlocDataMetadata(bloc);
    const style = metadata.style || 'bullet';
    const tag = style === 'number' ? 'ol' : 'ul';

    const lignes = bloc.textContent.split('\n').filter(line => line.trim() !== '');
    const items = lignes.map(line => `<li>${line.trim()}</li>`).join('');
    bloc.innerHTML = `<${tag}>${items}</${tag}>`;
}

export function handleSlashCommand(bloc, texte) {
    return new Promise((resolve) => {
        const parts = texte.trim().substring(1).split(" ");
        const command = parts[0].toLowerCase();
        const param = parts.slice(1).join(" ");

        switch (command) {
            case "page":
                const pageId = new URLSearchParams(window.location.search).get("id");
                createNewPage(param || "Nouvelle page", pageId).then(data => {
                    if (data && data.id) {
                        const lien = `/Projet/AfficherPage?id=${data.id}`;
                        bloc.innerHTML = `<a href="${lien}">${param || "Nouvelle page"}</a>`;
                        applyBlocType(bloc, "PAGE", { pageId: data.id, title: param, from: pageId });
                        autoResize(bloc);
                        resolve();
                    } else {
                        console.error("Erreur de création de page");
                        resolve();
                    }
                }).catch(error => {
                    console.error("Erreur lors de la création de la page :", error);
                    resolve();
                });
                break;

            case "h1":
            case "h2":
            case "h3":
                applyBlocType(bloc, "TITRE", { level: parseInt(command[1] || "1") });
                bloc.textContent = param;
                autoResize(bloc);
                resolve();
                break;

            case "ul":
                applyBlocType(bloc, "LISTE", { style: "bullet" });
                bloc.textContent = '';
                autoResize(bloc);
                resolve();
                break;

            case "ol":
                applyBlocType(bloc, "LISTE", { style: "numbered" });
                bloc.textContent = '';
                autoResize(bloc);
                resolve();
                break;

            case "code":
                applyBlocType(bloc, "CODE", { language: param || "plaintext" });
                bloc.textContent = '';
                autoResize(bloc);
                resolve();
                break;

            case "hr":
                applyBlocType(bloc, "SEPARATEUR", {}); // ou un type adapté selon ta logique
                bloc.innerText = ' ';
                autoResize(bloc);
                resolve(true);
                break;

            default:
                console.log(`Commande non reconnue: ${command}`);
                resolve();
                break;
        }

        bloc.focus();
        placeCursorAtEnd(bloc);
    });
}

export async function handleMarkdownSyntax(bloc, texte) {
    // Vérifier si c'est un titre
    if (texte.startsWith('#')) {
        const level = texte.split(' ')[0].length;  // Compter le nombre de # pour le niveau du titre
        if (level >= 1 && level <= 6) {
            applyBlocType(bloc, "TITRE", { level: level });
            bloc.textContent = texte.replace(/^#+\s*/, '');
            autoResize(bloc);
        }
    }
    // Vérifier si c'est une citation
    else if (texte.startsWith('>')) {
        const citation = detectCitation(texte);
        applyBlocType(bloc, "CITATION", { type: citation.type });
        bloc.textContent = citation.content;
        autoResize(bloc);
    }
    // Vérifier si c'est un bloc de code
    else if (texte.startsWith('```')) {
        applyBlocType(bloc, "CODE", {});
        bloc.textContent = texte.replace(/^```(.*)$/, '');
        autoResize(bloc);
    }
    // Vérifier si c'est un séparateur horizontal (Markdown)
    else if (texte.match(/^(\*{3,}|\-{3,}|_{3,})$/)) {
        applyBlocType(bloc, "SEPARATEUR", {});
        bloc.textContent = '';
        autoResize(bloc);
    }
    // Vérifier si c'est une liste
    else if (texte.match(/^(\s*([-*+])\s+.+|\s*\d+\.\s+.+)(\n|$)/m)) {
        const lignes = texte.split('\n').filter(line => line.trim() !== '');
        let style = 'bullet';

        if (lignes.every(line => line.trim().match(/^\d+\.\s+/))) {
            style = 'number';
        } else if (lignes.every(line => line.trim().match(/^[-*+]\s+/))) {
            style = 'bullet';
        } else {
            return; // Pas une vraie liste structurée
        }

        const contenu = lignes.map(line => line.replace(/^(\d+\.\s+|[-*+]\s+)/, '')).join('\n');
        applyBlocType(bloc, "LISTE", { style: style });
        bloc.textContent = contenu;
        renderListe(bloc);
        autoResize(bloc);
    }
}

export function getBlocDataMetadata(bloc) {
    try {
        return JSON.parse(bloc.getAttribute('data-metadata') || "{}");
    } catch (e) {
        return {};
    }
}

export function setBlocMetadata(bloc, metadata) {
    const metadataStr = JSON.stringify(metadata);
    bloc.dataset.metadata = metadataStr;
    bloc.setAttribute('data-metadata', metadataStr);
}

const citationTypes = {
    '>!': 'danger',
    '>i': 'info',
/*    '>w': 'warning',
    '>s': 'success',*/
    '>': 'normal' // doit rester en dernier
};

function detectCitation(texte) {
    for (const prefix in citationTypes) {
        if (texte.startsWith(prefix)) {
            return {
                type: citationTypes[prefix],
                content: texte.replace(new RegExp(`^${prefix}\\s*`), '')
            };
        }
    }
    return null;
}