package plugins

import (
	"fmt"

	lua "github.com/yuin/gopher-lua"
)

// registerAPI creates the global `verstak` table with all API modules.
func registerAPI(vm *LuaVM) {
	L := vm.L

	// Main verstak table
	verstak := L.NewTable()

	// Sub-modules
	verstak.RawSetString("node",     registerNodeAPI(vm))
	verstak.RawSetString("worklog",  registerWorklogAPI(vm))
	verstak.RawSetString("db",       registerDBAPI(vm))
	verstak.RawSetString("ui",       registerUIAPI(vm))
	verstak.RawSetString("config",   registerConfigAPI(vm))
	verstak.RawSetString("state",    registerStateAPI(vm))
	verstak.RawSetString("activity", registerActivityAPI(vm))
	verstak.RawSetString("schedule", registerScheduleAPI(vm))
	verstak.RawSetString("http",     registerHTTPAPI(vm))
	verstak.RawSetString("file",     registerFileAPI(vm))

	// Register as global
	L.SetGlobal("verstak", verstak)
}

// luaTableFromMap converts a Go map to a Lua table.
func luaTableFromMap(L *lua.LState, m map[string]interface{}) *lua.LTable {
	tbl := L.NewTable()
	for k, v := range m {
		tbl.RawSetString(k, toLuaValue(L, v))
	}
	return tbl
}

// luaTableFromList converts a Go slice to a Lua array table.
func luaTableFromList(L *lua.LState, items []map[string]interface{}) *lua.LTable {
	tbl := L.NewTable()
	for i, item := range items {
		tbl.RawSetInt(i+1, luaTableFromMap(L, item))
	}
	return tbl
}

// toLuaValue converts a Go value to a Lua value.
func toLuaValue(L *lua.LState, v interface{}) lua.LValue {
	switch val := v.(type) {
	case nil:
		return lua.LNil
	case string:
		return lua.LString(val)
	case int:
		return lua.LNumber(val)
	case int64:
		return lua.LNumber(val)
	case float64:
		return lua.LNumber(val)
	case bool:
		return lua.LBool(val)
	case []interface{}:
		tbl := L.NewTable()
		for i, item := range val {
			tbl.RawSetInt(i+1, toLuaValue(L, item))
		}
		return tbl
	case map[string]interface{}:
		return luaTableFromMap(L, val)
	default:
		return lua.LString(fmt.Sprintf("%v", v))
	}
}