/***********************************************************************************************************************************************************************
 * File Name: profile.controller.js  (client)
 * Type of Program: Controller
 * Description: Self-service profile management for all end users.
 *              All routes require: authenticate → requireClient()
 *
 *              Endpoints:
 *              GET    /api/client/profile          → view own profile
 *              PUT    /api/client/profile          → update personal_info
 *              GET    /api/client/sessions         → view own active sessions
 *              DELETE /api/client/sessions/:id     → revoke a specific session
 *              GET    /api/client/achievements     → view own achievements
 *
 * Author: rgrgogu
 * Date Created: Oct. 6, 2025
 ***********************************************************************************************************************************************************************/
const mdl_Users        = require('../../models/users/users.mdl');
const mdl_UserSessions = require('../../models/users/user_sessions.mdl');
const mdl_Achievements = require('../../models/users/achievements.mdl');
const logActivity      = require('../../utils/logActivity.util');
const R                = require('../../utils/response.util');
const { uploadFile, deleteFile } = require('../../services/s3.service');

// ─── GET own profile ───────────────────────────────────────────────────────────

exports.getProfile = async (req, res) => {
  try {
    const user = await mdl_Users.findByPk(req.user.user_id, {
      attributes: { exclude: ['password', 'otp_code', 'otp_expires_at'] },
    });
    return R.success(res, 'Profile retrieved.', user);
  } catch (err) {
    return R.error(res, 'Could not retrieve profile.', 500);
  }
};

// ─── PUT update own profile ────────────────────────────────────────────────────

exports.updateProfile = async (req, res) => {
  try {
    const user = await mdl_Users.findByPk(req.user.user_id);
    const { personal_info } = req.body;

    // Deep-merge personal_info so partial updates don't wipe existing data
    const merged = {
      ...(user.personal_info || {}),
      ...(personal_info || {}),
      name: {
        ...((user.personal_info?.name) || {}),
        ...((personal_info?.name) || {}),
      },
    };

    await user.update({ personal_info: merged, needs_intro: false });

    const updated = await mdl_Users.findByPk(req.user.user_id, {
      attributes: { exclude: ['password', 'otp_code', 'otp_expires_at'] },
    });

    logActivity(req.user.user_id, 'update_profile');

    return R.success(res, 'Profile updated.', updated);
  } catch (err) {
    console.error('[CLIENT] updateProfile error:', err);
    return R.error(res, 'Profile update failed.', 500);
  }
};

// ─── GET own sessions ──────────────────────────────────────────────────────────

exports.getSessions = async (req, res) => {
  try {
    const sessions = await mdl_UserSessions.findAll({
      where:      { user_id: req.user.user_id, is_active: true },
      order:      [['createdAt', 'DESC']],
      attributes: { exclude: ['refresh_token_hash'] },
    });
    return R.success(res, 'Sessions retrieved.', sessions);
  } catch (err) {
    return R.error(res, 'Could not retrieve sessions.', 500);
  }
};

// ─── DELETE revoke a session ───────────────────────────────────────────────────

exports.revokeSession = async (req, res) => {
  try {
    const session = await mdl_UserSessions.findOne({
      where: { session_id: req.params.id, user_id: req.user.user_id },
    });
    if (!session) return R.error(res, 'Session not found.', 404);

    await session.update({
      is_active:   false,
      logout_info: { date: new Date().toISOString(), ip_address: req.ip },
    });

    logActivity(req.user.user_id, 'revoke_session', { entityType: 'session', entityId: session.session_id });

    return R.success(res, 'Session revoked.');
  } catch (err) {
    return R.error(res, 'Could not revoke session.', 500);
  }
};

// ─── POST upload own avatar ────────────────────────────────────────────────────

exports.uploadAvatar = async (req, res) => {
  try {
    if (!req.file) return R.error(res, 'No file provided.', 400);

    const user = await mdl_Users.findByPk(req.user.user_id);

    // Remove old avatar from S3 before replacing
    const oldKey = user.personal_info?.avatar?.uuid;
    if (oldKey) await deleteFile(oldKey).catch(() => {});

    const { url, uuid } = await uploadFile({
      buffer:       req.file.buffer,
      originalname: req.file.originalname,
      mimetype:     req.file.mimetype,
      ownerType:    'avatar',
    });

    const merged = {
      ...(user.personal_info || {}),
      avatar: {
        url,
        uuid,
        name:      req.file.originalname,
        mime_type: req.file.mimetype,
        size:      req.file.size,
      },
    };

    await user.update({ personal_info: merged });

    const updated = await mdl_Users.findByPk(req.user.user_id, {
      attributes: { exclude: ['password', 'otp_code', 'otp_expires_at'] },
    });
    return R.success(res, 'Avatar updated.', updated);
  } catch (err) {
    console.error('[CLIENT] uploadAvatar error:', err);
    return R.error(res, 'Avatar upload failed.', 500);
  }
};

// ─── DELETE remove own avatar ──────────────────────────────────────────────────

exports.deleteAvatar = async (req, res) => {
  try {
    const user = await mdl_Users.findByPk(req.user.user_id);
    const key  = user.personal_info?.avatar?.uuid;
    if (!key) return R.error(res, 'No avatar to remove.', 404);

    await deleteFile(key).catch(() => {});

    const merged = { ...(user.personal_info || {}), avatar: null };
    await user.update({ personal_info: merged });

    return R.success(res, 'Avatar removed.');
  } catch (err) {
    console.error('[CLIENT] deleteAvatar error:', err);
    return R.error(res, 'Could not remove avatar.', 500);
  }
};

// ─── GET own achievements ──────────────────────────────────────────────────────

exports.getAchievements = async (req, res) => {
  try {
    const achievements = await mdl_Achievements.findAll({
      where: { user_id: req.user.user_id },
      order: [['granted_at', 'DESC']],
    });
    return R.success(res, 'Achievements retrieved.', achievements);
  } catch (err) {
    return R.error(res, 'Could not retrieve achievements.', 500);
  }
};