-- Minimal mw.wikibase compatibility shim.
-- This intentionally returns nil/empty results because the container does not
-- include a local Wikidata repository. The goal is to keep zhwiki modules from
-- crashing when they probe mw.wikibase.

local wikibase = {}

local function emptyTable()
    return {}
end

local dummyEntity = {
    id = nil,
    type = 'item',
    schemaVersion = 2,
    labels = {},
    descriptions = {},
    aliases = {},
    claims = {},
    statements = {},
    sitelinks = {}
}

function dummyEntity:getLabel()
    return nil
end

function dummyEntity:getLabelWithLang()
    return nil, nil
end

function dummyEntity:getDescription()
    return nil
end

function dummyEntity:getAliases()
    return {}
end

function dummyEntity:getSitelink()
    return nil
end

function dummyEntity:getBestStatements()
    return {}
end

function dummyEntity:getAllStatements()
    return {}
end

function dummyEntity:formatPropertyValues()
    return {}
end

function dummyEntity:formatStatements()
    return {}
end

function dummyEntity:getProperties()
    return {}
end

local function newDummyEntity( id )
    local entity = {}
    for k, v in pairs( dummyEntity ) do
        entity[k] = v
    end
    entity.id = id
    return entity
end

function wikibase.getEntity( id )
    if id == nil or id == '' then
        return nil
    end
    return newDummyEntity( id )
end

function wikibase.getEntityObject( id )
    return wikibase.getEntity( id )
end

function wikibase.getEntityIdForCurrentPage()
    return nil
end

function wikibase.getEntityIdForTitle()
    return nil
end

function wikibase.getEntityUrl( id )
    if type( id ) == 'string' and id ~= '' then
        return 'https://www.wikidata.org/wiki/' .. id
    end
    return nil
end

function wikibase.getLabel()
    return nil
end

function wikibase.getLabelWithLang()
    return nil, nil
end

function wikibase.getLabelByLang()
    return nil
end

function wikibase.getDescription()
    return nil
end

function wikibase.getDescriptionWithLang()
    return nil, nil
end

function wikibase.getDescriptionByLang()
    return nil
end

function wikibase.getAliases()
    return {}
end

function wikibase.getSitelink()
    return nil
end

function wikibase.getBadges()
    return {}
end

function wikibase.getBestStatements()
    return {}
end

function wikibase.getAllStatements()
    return {}
end

function wikibase.getStatement()
    return nil
end

function wikibase.formatValue()
    return nil
end

function wikibase.renderSnak()
    return nil
end

function wikibase.renderSnaks()
    return nil
end

function wikibase.formatStatement()
    return nil
end

function wikibase.formatStatements()
    return {}
end

function wikibase.getReferencedEntityId()
    return nil
end

function wikibase.resolvePropertyId( id )
    if type( id ) == 'string' and id:match( '^P%d+$' ) then
        return id
    end
    return nil
end

function wikibase.getPropertyId( id )
    return wikibase.resolvePropertyId( id )
end

function wikibase.getLanguageFallbacksFor( lang )
    if type( lang ) == 'string' and lang ~= '' then
        return { lang }
    end
    return {}
end

function wikibase.setupInterface()
    wikibase.setupInterface = nil
    mw = mw or {}
    mw.wikibase = wikibase
    package.loaded['mw.wikibase'] = wikibase
    package.loaded['mw.wikibase.entity'] = dummyEntity
end

return wikibase