subbuteo

The most likely candidates are Magpie Robin or Blue whistling thrush as they will start to sing before dawn.  Both have complex songs and are found near houses.  Hainan Blue Flycatcher is a maybe but prefers forest.  There are many other possibles!

Try searching on xeno-canto and comparing the songs of those species to the songs you hear.  Even better, record it and share it on here.

Dylan