const axios = require('axios');
const cheerio = require('cheerio');
const fs = require('fs');
const path = require('path');
const os = require('os');
const { Client, Databases, Storage, ID, Query } = require('node-appwrite');
require('dotenv').config({ path: '.env.local' });

let InputFile;
try { InputFile = require('node-appwrite/file').InputFile; } catch (e) { InputFile = null; }

const { applyTablesDbShim } = require('../src/lib/appwrite-tables-shim');
const client = new Client()
    .setEndpoint(process.env.NEXT_PUBLIC_APPWRITE_ENDPOINT)
    .setProject(process.env.NEXT_PUBLIC_APPWRITE_PROJECT_ID)
    .setKey(process.env.APPWRITE_API_KEY);
applyTablesDbShim(client);

const databases = new Databases(client);
const storage = new Storage(client);
const DB_ID = process.env.APPWRITE_DATABASE_ID;
const BUCKET_ID = process.env.NEXT_PUBLIC_APPWRITE_MEDIA_BUCKET_ID;

function slugify(text) {
    return text
      .toString()
      .toLowerCase()
      .normalize('NFD')
      .replace(/[\u0300-\u036f]/g, '')
      .replace(/[^a-z0-9 -]/g, '')
      .replace(/\s+/g, '-')
      .replace(/-+/g, '-')
      .trim();
}

function cleanContentHtml(html) {
    if (!html) return '';
    const $ = cheerio.load(html, null, false);
    
    $('style, script, link, iframe, object, embed, video, audio, source, noscript').remove();
    
    const allowedTags = ['p', 'b', 'i', 'strong', 'em', 'ul', 'ol', 'li', 'br', 'a'];
    
    function processNode(node) {
        $(node).children().each((i, child) => {
            processNode(child);
        });
        
        const tagName = node.tagName ? node.tagName.toLowerCase() : null;
        if (tagName) {
            const attribs = Object.keys(node.attribs || {});
            attribs.forEach(attr => {
                if (tagName !== 'a' || attr !== 'href') {
                    $(node).removeAttr(attr);
                }
            });
            
            if (!allowedTags.includes(tagName)) {
                $(node).replaceWith($(node).html() || '');
            }
        }
    }
    
    $.root().children().each((i, child) => {
        processNode(child);
    });
    
    return $.html().trim();
}

async function getCollectionIds() {
    const list = await databases.listCollections(DB_ID);
    const map = {};
    list.collections.forEach(c => { map[c.name.toLowerCase()] = c.$id; });
    return map;
}

const sleep = ms => new Promise(res => setTimeout(res, ms));

async function run() {
    console.log("===============================================================================");
    console.log("Iniciando publicación de noticias de la Gobernación del Cauca (17 Sep a la fecha)");
    console.log("===============================================================================");

    try {
        const collections = await getCollectionIds();
        const postsCollectionId = collections['posts'] || 'posts';
        const mediaCollectionId = collections['media'] || 'media';
        const pubTypesCollectionId = collections['publication types'] || collections['publication_types'] || 'publication_types';

        // 1. Obtener ID del tipo de publicación NOTICIA
        const pubTypesRes = await databases.listDocuments(DB_ID, pubTypesCollectionId);
        const typeMap = {};
        pubTypesRes.documents.forEach(d => {
            typeMap[d.codigo] = d.$id;
        });
        const typeId = typeMap['NOTICIA'];
        if (!typeId) {
            throw new Error("No se encontró el tipo de publicación NOTICIA en Appwrite.");
        }
        console.log(`Tipo de publicación NOTICIA ID: ${typeId}`);

        // 2. Obtener lista de noticias desde la API SharePoint de la Gobernación
        console.log("Consultando API SharePoint de cauca.gov.co...");
        const listUrl = "https://cauca.gov.co/Prensa/SaladePrensa/_api/web/lists(guid'e1840969-e886-4c1e-8cde-7498ab33f10a')/items?$select=Id,Title,ArticleStartDate,Created,Modified,File/ServerRelativeUrl&$expand=File&$orderby=Created desc&$top=100";
        const spRes = await axios.get(listUrl, {
            headers: { 'Accept': 'application/json;odata=verbose', 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36' },
            timeout: 15000
        });

        const rawItems = spRes.data.d?.results || [];
        console.log(`Total artículos obtenidos de SharePoint: ${rawItems.length}`);

        // Filtrar desde el 21 de agosto de 2026 (00:00:00) hasta la fecha
        const targetStartDate = new Date('2026-08-21T00:00:00');
        const filteredItems = rawItems.filter(it => {
            const dateStr = it.ArticleStartDate || it.Created;
            const d = new Date(dateStr);
            return d >= targetStartDate;
        });

        console.log(`Artículos identificados desde el 17 de septiembre: ${filteredItems.length}`);

        // Ordenar cronológicamente (los más antiguos primero para que los más nuevos queden en la parte superior del portal)
        filteredItems.sort((a, b) => {
            const da = new Date(a.ArticleStartDate || a.Created).getTime();
            const db = new Date(b.ArticleStartDate || b.Created).getTime();
            return da - db;
        });

        // 3. Consultar slugs existentes en Appwrite para evitar duplicados
        console.log("Verificando publicaciones existentes en Appwrite...");
        const existingSlugs = new Set();
        let cursor = null;
        while (true) {
            const queries = [Query.limit(100), Query.select(['slug'])];
            if (cursor) queries.push(Query.cursorAfter(cursor));
            const existingRes = await databases.listDocuments(DB_ID, postsCollectionId, queries);
            existingRes.documents.forEach(d => {
                if (d.slug) existingSlugs.add(d.slug);
            });
            if (existingRes.documents.length < 100) break;
            cursor = existingRes.documents[existingRes.documents.length - 1].$id;
        }
        console.log(`Slugs existentes en posts: ${existingSlugs.size}`);

        let publishedCount = 0;
        let skippedCount = 0;
        let errorsCount = 0;

        for (let i = 0; i < filteredItems.length; i++) {
            const item = filteredItems[i];
            const pubDate = new Date(item.ArticleStartDate || item.Created);
            const rawTitle = (item.Title || '').trim();
            const slug = `gobernacion-web-${slugify(rawTitle)}`.substring(0, 95);

            console.log(`\n-------------------------------------------------------------------------------`);
            console.log(`[${i + 1}/${filteredItems.length}] Noticia ID: ${item.Id} | Fecha: ${pubDate.toISOString().split('T')[0]}`);
            console.log(`Título: "${rawTitle}"`);
            console.log(`Slug: ${slug}`);

            if (existingSlugs.has(slug)) {
                console.log(`-> Ya existe en Appwrite con slug: ${slug}. Se omite duplicado.`);
                skippedCount++;
                continue;
            }

            const relativeUrl = item.File?.ServerRelativeUrl;
            if (!relativeUrl) {
                console.error("-> Error: No se encontró URL relativa para este artículo.");
                errorsCount++;
                continue;
            }

            const pageUrl = "https://cauca.gov.co" + encodeURI(decodeURI(relativeUrl));
            console.log(`-> Obteniendo contenido de página: ${pageUrl}`);

            try {
                const pageRes = await axios.get(pageUrl, {
                    headers: { 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36' },
                    timeout: 15000
                });

                const $ = cheerio.load(pageRes.data);

                // A. Extraer imagen destacada
                let imageUrl = null;
                $('.ms-rtestate-field img').each((idx, el) => {
                    const src = $(el).attr('src');
                    if (src && !src.includes('logo') && !src.includes('icon')) {
                        imageUrl = src.startsWith('http') ? src : 'https://cauca.gov.co' + src;
                        return false;
                    }
                });

                if (!imageUrl) {
                    $('img').each((idx, el) => {
                        const src = $(el).attr('src');
                        if (src && src.includes('/Prensa/PublishingImages/')) {
                            imageUrl = src.startsWith('http') ? src : 'https://cauca.gov.co' + src;
                            return false;
                        }
                    });
                }

                if (!imageUrl) {
                    $('img').each((idx, el) => {
                        const src = $(el).attr('src');
                        if (src && !src.includes('logo') && !src.includes('icon') && !src.includes('menu') && src.length > 10) {
                            imageUrl = src.startsWith('http') ? src : 'https://cauca.gov.co' + src;
                            return false;
                        }
                    });
                }

                // B. Extraer contenido HTML
                let contentHtml = null;
                let maxLen = 0;
                $('.ms-rtestate-field').each((idx, el) => {
                    const textLen = $(el).text().trim().length;
                    if (textLen > maxLen) {
                        maxLen = textLen;
                        contentHtml = $(el).html();
                    }
                });

                if (!contentHtml) {
                    contentHtml = $('.lg\\:container.mx-auto.flex.items-center.justify-center.my-\\[80px\\]').html();
                }

                if (!contentHtml || contentHtml.trim().length === 0) {
                    console.error("-> Error: Contenido de la noticia vacío.");
                    errorsCount++;
                    continue;
                }

                const cleanedContent = cleanContentHtml(contentHtml);
                const plainText = cheerio.load(cleanedContent).text().replace(/\s+/g, ' ').trim();
                let summary = plainText.substring(0, 150);
                if (plainText.length > 150) summary += '...';

                // C. Descargar y subir imagen destacada a Appwrite Storage y Media
                let mediaId = null;
                if (imageUrl) {
                    try {
                        console.log(`-> Descargando imagen: ${imageUrl}`);
                        const imgRes = await axios.get(encodeURI(decodeURI(imageUrl)), {
                            responseType: 'arraybuffer',
                            timeout: 15000,
                            headers: {
                                'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36'
                            }
                        });

                        const buffer = Buffer.from(imgRes.data, 'binary');
                        const isHtml = buffer.toString('utf-8', 0, 50).trim().toLowerCase().startsWith('<!doctype') || buffer.toString('utf-8', 0, 20).trim().toLowerCase().startsWith('<html');

                        if (!isHtml && buffer.length > 500) {
                            const urlParts = imageUrl.split('/');
                            let filename = urlParts[urlParts.length - 1] || 'imagen.jpg';
                            filename = decodeURIComponent(filename).replace(/[^a-zA-Z0-9._-]/g, '_');
                            if (!filename.includes('.')) filename += '.jpg';

                            const tempFilePath = path.join(os.tmpdir(), `gob_${ID.unique()}_${filename}`);
                            fs.writeFileSync(tempFilePath, buffer);

                            let fileParam;
                            if (InputFile && InputFile.fromPath) {
                                fileParam = InputFile.fromPath(tempFilePath, filename);
                            } else {
                                fileParam = fs.createReadStream(tempFilePath);
                            }

                            console.log(`-> Subiendo imagen al bucket (${BUCKET_ID})...`);
                            const fileUploaded = await storage.createFile(BUCKET_ID, ID.unique(), fileParam);

                            console.log(`-> Registrando en colección media...`);
                            const mediaDoc = await databases.createDocument(DB_ID, mediaCollectionId, ID.unique(), {
                                file_id: fileUploaded.$id,
                                bucket_id: BUCKET_ID,
                                titulo: rawTitle.substring(0, 245),
                                tipo: 'imagen'
                            });
                            mediaId = mediaDoc.$id;

                            try { fs.unlinkSync(tempFilePath); } catch (e) {}
                        } else {
                            console.log("-> Aviso: La imagen obtenida no es un binario válido.");
                        }
                    } catch (imgErr) {
                        console.error(`-> Error al procesar imagen: ${imgErr.message}`);
                    }
                }

                // D. Crear publicación en Appwrite
                const postDoc = {
                    titulo: rawTitle.substring(0, 245),
                    slug: slug,
                    tipo: 'noticia',
                    tipo_publicacion_id: typeId,
                    estado: 'publicado',
                    fecha_publicacion: pubDate.toISOString(),
                    contenido: cleanedContent,
                    resumen_redes: summary,
                    seo_descripcion: summary.substring(0, 155),
                    seo_titulo: rawTitle.substring(0, 58),
                    imagen_destacada_id: mediaId
                };

                console.log(`-> Guardando documento en Appwrite posts...`);
                const createdPost = await databases.createDocument(DB_ID, postsCollectionId, ID.unique(), postDoc);
                console.log(`✓ [ÉXITO] Publicada correctamente! Post ID: ${createdPost.$id}`);
                existingSlugs.add(slug);
                publishedCount++;

                // Pausa prudente entre peticiones
                await sleep(1200);

            } catch (err) {
                console.error(`-> Error publicando noticia: ${err.message}`);
                errorsCount++;
            }
        }

        console.log("\n===============================================================================");
        console.log(`RESUMEN FINAL:`);
        console.log(`Total identificadas: ${filteredItems.length}`);
        console.log(`Publicadas exitosamente: ${publishedCount}`);
        console.log(`Omitidas por ya existir: ${skippedCount}`);
        console.log(`Errores: ${errorsCount}`);
        console.log("===============================================================================");

    } catch (e) {
        console.error("Error fatal en proceso de publicación:", e.message);
    }
}

run();