import lyng.io.db.sqlite

println("SQLite serialization demo: write-side projection and decodeAs<T>()")

class Payload(name: String, count: Int)

class Item(
    id: Int,
    title: String,
    @DbJson meta: Payload,
    @DbLynon state: Payload
) {
    var note: String = ""
    @DbExcept var cache: String = ""
}

val restored = openSqlite(":memory:").transaction { tx ->
    tx.execute(
        "create table item(id integer not null, title text not null, meta text not null, state blob not null, note text not null)"
    )

    val item = Item(1, "first", Payload("json", 10), Payload("bin", 20))
    item.note = "created"
    item.cache = "not stored"

    tx.execute("insert into item(@cols(?1)) values(@vals(?1))", item)

    item.title = "second"
    item.meta = Payload("json2", 11)
    item.state = Payload("bin2", 21)
    item.note = "updated"

    tx.execute(
        "update item set @set(?1 except: \"id\") where id = ?2",
        item,
        item.id
    )

    val restored = tx.select("select * from item where id = ?", 1).decodeAs<Item>().first

    assertEquals("second", restored.title)
    assertEquals("json2", restored.meta.name)
    assertEquals(11, restored.meta.count)
    assertEquals("bin2", restored.state.name)
    assertEquals(21, restored.state.count)
    assertEquals("updated", restored.note)
    restored
} as Item

println("Restored item:")
println("  id=" + restored.id)
println("  title=" + restored.title)
println("  meta=" + restored.meta.name + "/" + restored.meta.count)
println("  state=" + restored.state.name + "/" + restored.state.count)
println("  note=" + restored.note)
println("OK")