// Copyright (c) 2025 Nikolai Papin
//
// This file is part of Easywish
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
// the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

package services

import (
	"easywish/internal/database"
	"easywish/internal/dto"
	errs "easywish/internal/errors"
	mapspecial "easywish/internal/utils/mapSpecial"
	"errors"

	"github.com/go-redis/redis/v8"
	"github.com/jackc/pgx/v5"
	"go.uber.org/zap"
)

type ProfileService interface {
	GetProfileByUsername(cinfo dto.ClientInfo, username string) (*dto.ProfileDto, error)
	GetMyProfile(cinfo dto.ClientInfo) (*dto.ProfileDto, error)
	UpdateProfile(cinfo dto.ClientInfo, newProfile dto.ProfileDto) (bool, error)
	GetProfileSettings(cinfo dto.ClientInfo) (*dto.ProfileSettingsDto, error)
	UpdateProfileSettings(cinfo dto.ClientInfo, newProfileSettings dto.ProfileSettingsDto) (bool, error)
	UploadAvatar(cinfo dto.ClientInfo, filePath string) (*string, error)
}

type profileServiceImpl struct {
	log   *zap.Logger
	dbctx database.DbContext
	redis *redis.Client
}

func NewProfileService(_log *zap.Logger, _dbctx database.DbContext, _redis *redis.Client) ProfileService {
	return &profileServiceImpl{log: _log, dbctx: _dbctx, redis: _redis}
}

// XXX: untested
func (p *profileServiceImpl) GetMyProfile(cinfo dto.ClientInfo) (*dto.ProfileDto, error) {
	db := database.NewDbHelper(p.dbctx);

	profile, err := db.Queries.GetProfileByUsername(db.CTX, cinfo.Username); if err != nil {
		p.log.Error(
			"Failed to find user profile by username",	
			zap.Error(err))
		return nil, errs.ErrServerError
	}

	var profileDto dto.ProfileDto
	mapspecial.MapProfileDto(profile, profileDto)

	return &profileDto, nil
}

// TODO: Profile privacy settings checks
func (p *profileServiceImpl) GetProfileByUsername(cinfo dto.ClientInfo, username string) (*dto.ProfileDto, error) {
	helper, db, err := database.NewDbHelperTransaction(p.dbctx); if err != nil {
		p.log.Error(
			"Failed to start transaction",	
			zap.Error(err))
		return nil, errs.ErrServerError
	}
	defer helper.Rollback()

	profile, err := db.TXQueries.GetProfileByUsername(db.CTX, username); if err != nil {
		if errors.Is(err, pgx.ErrNoRows) {
			return nil, errs.ErrNotFound
		}

		p.log.Error(
			"Failed to get user profile by username",	
			zap.String("username", username),
			zap.Error(err))
		return nil, errs.ErrServerError
	}

	var profileDto dto.ProfileDto
	mapspecial.MapProfileDto(profile, profileDto)

	return &profileDto, nil
}

func (p *profileServiceImpl) GetProfileSettings(cinfo dto.ClientInfo) (*dto.ProfileSettingsDto, error) {
	panic("unimplemented")
}

func (p *profileServiceImpl) UpdateProfile(cinfo dto.ClientInfo, newProfile dto.ProfileDto) (bool, error) {
	panic("unimplemented")
}

func (p *profileServiceImpl) UpdateProfileSettings(cinfo dto.ClientInfo, newProfileSettings dto.ProfileSettingsDto) (bool, error) {
	panic("unimplemented")
}

func (p *profileServiceImpl) UploadAvatar(cinfo dto.ClientInfo, filePath string) (*string, error) {
	panic("unimplemented")
}