const { Scenes, Markup } = require('telegraf');
const User = require('../../models/User');

const usersScene = new Scenes.WizardScene(
    'admin_users',

    // Step 1: Main Menu for User Management
    async (ctx) => {
        // Inject i18n
        if (!ctx.i18n) {
            const User = require('../../models/User');
            const locales = require('../../locales');
            const user = await User.findOne({ id: ctx.from.id });
            const lang = (user && user.language) ? user.language : 'uz';
            ctx.i18n = locales[lang] || locales.uz;
        }
        const i18n = ctx.i18n;

        const text = i18n.admin.users_title;
        const buttons = [
            [Markup.button.callback(i18n.admin.users_search, "search_id")],
            [Markup.button.callback(i18n.admin.users_blocked, "list_blocked")],
            [Markup.button.callback(i18n.admin.back, "back_dashboard")]
        ];

        if (ctx.callbackQuery) {
            await ctx.editMessageText(text, { parse_mode: 'Markdown', ...Markup.inlineKeyboard(buttons) });
        } else {
            await ctx.replyWithMarkdown(text, Markup.inlineKeyboard(buttons));
        }
        return ctx.wizard.next();
    },

    // Step 2: Handle Selection
    async (ctx) => {
        // Ensure i18n
        if (!ctx.i18n) { const locales = require('../../locales'); ctx.i18n = locales.uz; }
        const i18n = ctx.i18n;

        if (!ctx.callbackQuery && !ctx.message) return;

        const txt = ctx.message ? ctx.message.text : '';
        if (txt === '/start' || txt === i18n.admin.btn_reject || txt === '❌ Bekor qilish') {
            return ctx.scene.leave();
        }

        if (ctx.callbackQuery) {
            const data = ctx.callbackQuery.data;

            if (data === 'back_dashboard') {
                await ctx.scene.leave();
                const adminController = require('../../controllers/adminController');
                return adminController.showDashboard(ctx);
            }

            if (data === 'search_id') {
                await ctx.reply(i18n.admin.users_search_prompt, Markup.keyboard([[i18n.admin.btn_reject]]).resize());
                ctx.wizard.state.action = 'search_id';
                return ctx.wizard.next();
            }

            if (data === 'list_blocked') {
                const blockedUsers = await User.find({ isBlocked: true });
                if (blockedUsers.length === 0) {
                    await ctx.answerCbQuery(i18n.admin.users_blocked + ": 0");
                    return;
                }

                let msg = `${i18n.admin.users_blocked}:\n\n`;
                blockedUsers.forEach(u => {
                    msg += `👤 ${u.first_name} (ID: ${u.id})\n`;
                });
                await ctx.replyWithMarkdown(msg);
                return;
            }
        }
    },

    // Step 3: Input Handler (Search ID) & Action Execution
    async (ctx) => {
        // Ensure i18n
        if (!ctx.i18n) { const locales = require('../../locales'); ctx.i18n = locales.uz; }
        const i18n = ctx.i18n;

        const txt = ctx.message ? ctx.message.text : '';
        if (txt === i18n.admin.btn_reject || txt === '❌ Bekor qilish') {
            await ctx.reply(i18n.admin.back, Markup.removeKeyboard());
            return ctx.scene.leave();
        }

        if (ctx.wizard.state.action === 'search_id') {
            const userId = parseInt(txt);
            if (isNaN(userId)) {
                await ctx.reply(i18n.admin.error_num || "Error");
                return;
            }

            const user = await User.findOne({ id: userId });
            if (!user) {
                await ctx.reply(i18n.admin.del_fail || "Not found");
                return ctx.scene.leave();
            }

            ctx.wizard.state.selectedUser = user;

            // Show User Details
            const status = user.isBlocked ? i18n.admin.users_blocked : "✅ Aktiv";
            const info = `${i18n.admin.users_info}\n\n` +
                `🆔 ID: \`${user.id}\`\n` +
                `👤 ${i18n.name}: ${user.first_name}\n` +
                `📞 ${i18n.phone}: ${user.phone || "Yo'q"}\n` +
                `📊 Status: ${status}\n` +
                `📅 Date: ${user.createdAt.toLocaleDateString()}`;

            const buttons = [];
            if (user.isBlocked) {
                buttons.push([Markup.button.callback(i18n.admin.btn_unban, "unban_user")]);
            } else {
                buttons.push([Markup.button.callback(i18n.admin.btn_ban, "ban_user")]);
            }
            buttons.push([Markup.button.callback(i18n.admin.btn_dm, "dm_user")]);
            buttons.push([Markup.button.callback(i18n.admin.btn_reject, "cancel")]);

            await ctx.replyWithMarkdown(info, Markup.inlineKeyboard(buttons));
            return ctx.wizard.next();
        }
    },

    // Step 4: Handle User Actions (Ban/Unban/DM)
    async (ctx) => {
        // Ensure i18n
        const i18n = ctx.i18n || require('../../locales').uz;

        if (ctx.callbackQuery) {
            const data = ctx.callbackQuery.data;
            const user = ctx.wizard.state.selectedUser;

            if (data === 'cancel') {
                await ctx.deleteMessage();
                await ctx.reply(i18n.admin.back, Markup.removeKeyboard());
                return ctx.scene.leave();
            }

            if (data === 'ban_user') {
                await User.updateOne({ id: user.id }, { isBlocked: true });
                await ctx.answerCbQuery(i18n.admin.btn_ban);
                await ctx.reply(`🚫 ${user.first_name} blocked.`);
                return ctx.scene.leave();
            }

            if (data === 'unban_user') {
                await User.updateOne({ id: user.id }, { isBlocked: false });
                await ctx.answerCbQuery(i18n.admin.btn_unban);
                await ctx.reply(`✅ ${user.first_name} unblocked.`);
                return ctx.scene.leave();
            }

            if (data === 'dm_user') {
                await ctx.reply(i18n.admin.dm_prompt, Markup.keyboard([[i18n.admin.btn_reject]]).resize());
                ctx.wizard.state.action = 'typing_dm';
                return ctx.wizard.next(); // Go to Step 5 (DM Input)
            }
        }
    },

    // Step 5: Send DM
    async (ctx) => {
        // Ensure i18n
        const i18n = ctx.i18n || require('../../locales').uz;

        const txt = ctx.message ? ctx.message.text : '';
        if (txt === i18n.admin.btn_reject || txt === '❌ Bekor qilish') {
            await ctx.reply(i18n.admin.back, Markup.removeKeyboard());
            return ctx.scene.leave();
        }

        const user = ctx.wizard.state.selectedUser;

        try {
            await ctx.telegram.sendMessage(user.id, `🔔 **Admin:**\n\n${txt}`, { parse_mode: 'Markdown' });
            await ctx.reply(i18n.admin.dm_sent);
        } catch (err) {
            await ctx.reply(i18n.admin.error);
        }

        return ctx.scene.leave();
    }
);

module.exports = usersScene;