package com.yunhai.userhome.service.impl;

import com.yunhai.platform.utils.model.BoaUser;
import com.yunhai.userhome.entity.SchSettings;
import com.yunhai.userhome.entity.UserCurrentRole;
import com.yunhai.userhome.repository.SchSettingsRepository;
import com.yunhai.userhome.service.ISchSettingsService;
import com.yunhai.userhome.service.IUserCurrentRoleService;
import com.yunhai.userhome.utils.ThemeCodec;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Optional;

/**
 * 学校设置服务：学校设置完全本地化（sch_settings 表），不再依赖跨仓 schConfig。
 * <p>findBySchId 直接查本地表，查不到兜底默认主题；saveSchTheme/saveSchLogo 写本地表即可闭环。</p>
 */
@Service
public class SchSettingsServiceImpl implements ISchSettingsService {

    @Autowired
    private SchSettingsRepository schSettingsRepository;

    @Autowired
    private IUserCurrentRoleService userCurrentRoleService;

    @Override
    public void save(SchSettings schSettings) {
        schSettingsRepository.save(schSettings);
    }

    @Override
    public Optional<SchSettings> findBySchIdRaw(Integer schId) {
        return schSettingsRepository.findFirstBySchId(schId);
    }

    @Override
    public Optional<SchSettings> findBySchId(Integer schId) {
        Optional<SchSettings> local = schSettingsRepository.findFirstBySchId(schId);
        if (local.isPresent()) {
            return local;
        }
        SchSettings def = new SchSettings();
        def.setSchId(schId);
        def.setThemeName("default-theme");
        def.setAppBgUrl("");
        def.setLogoUrl("");
        return Optional.of(def);
    }

    @Override
    public java.util.List<SchSettings> findBySchIds(java.util.List<Integer> schId) {
        return schSettingsRepository.getSchSettingList(schId);
    }

    @Override
    public Integer resolveSchId(BoaUser user) {
        if (user.getSchool() != null) {
            return user.getSchool().getId();
        }
        if (user.getBureau() != null) {
            return user.getBureau().getId();
        }
        return 0;
    }

    @Override
    public Integer resolveThemeSchId(BoaUser user, Integer explicitSchId) {
        if (user.getType() != null && user.getType() == 1) {
            return explicitSchId == null ? 0 : explicitSchId;
        }
        return userCurrentRoleService.findById(user.getId())
                .map(UserCurrentRole::getSchId)
                .filter(schId -> schId != null && schId > 0)
                .orElseGet(() -> resolveSchId(user));
    }

    @Override
    public ISchSettingsService.LayerValue readThemeWithFallback(Integer schId) {
        String themeState = decodeTheme(schId);
        if (themeState != null || schId == null || schId == ISchSettingsService.PLATFORM_SCH_ID) {
            return new ISchSettingsService.LayerValue(themeState, schId);
        }
        return new ISchSettingsService.LayerValue(decodeTheme(ISchSettingsService.PLATFORM_SCH_ID),
                ISchSettingsService.PLATFORM_SCH_ID);
    }

    @Override
    public ISchSettingsService.LayerValue readAvatarWithFallback(Integer schId) {
        String avatarStyle = readAvatarAt(schId);
        if (avatarStyle != null || schId == null || schId == ISchSettingsService.PLATFORM_SCH_ID) {
            return new ISchSettingsService.LayerValue(avatarStyle, schId);
        }
        return new ISchSettingsService.LayerValue(readAvatarAt(ISchSettingsService.PLATFORM_SCH_ID),
                ISchSettingsService.PLATFORM_SCH_ID);
    }

    /** 原样读某层主题档并解码（查无行/旧格式/脏值 → null） */
    private String decodeTheme(Integer schId) {
        return schSettingsRepository.findFirstBySchId(schId)
                .map(SchSettings::getThemeName)
                .map(ThemeCodec::decodeThemeState)
                .orElse(null);
    }

    /** 原样读某层头像样式（查无行/非法值 → null） */
    private String readAvatarAt(Integer schId) {
        return schSettingsRepository.findFirstBySchId(schId)
                .map(SchSettings::getAvatarStyle)
                .filter(ThemeCodec::isAvatarStyle)
                .orElse(null);
    }
}