Idan kika kwana ba tare da barci mai kyau ba, za ki ji gajiya da safe.

In Hausa, after idan (if / when), you normally use a special verb form that combines the pronoun with an aspect marker:

• Idan ka kwana – if you (masc.) spend the night
• Idan kika kwana – if you (fem.) spend the night

Here, kika is not just ki. It is:

• ki (2nd person singular feminine pronoun)
• a particle -ka used in certain conditional / relative environments

You can think of kika kwana as “when/if you (fem.) spend the night (have spent the night)”.
So Idan ki kwana is not grammatical; you need the combined form kika after idan in this pattern.

They refer to the same “you (feminine singular)”, but they mark different things:

• kika kwana – past/perfective inside the conditional clause
  
  • “if/when you spend the night / if you have spent the night”
• za ki ji – future in the main clause
  
  • “you will feel”

So:

• kika = you (fem.) + conditional/perfective pattern (in the if part)
• za ki = future marker (za) + you (fem.) pronoun (ki)

Together: If you (fem.) spend the night …, you (fem.) will feel …

Hausa always marks gender in the 2nd and 3rd person singular:

• kai / ka / za ka – “you (masculine)”
• ke / ki / za ki – “you (feminine)”

In this sentence the speaker is talking to a female, so:

• Idan kika kwana … – If you (fem.) spend the night …
• za ki ji … – you (fem.) will feel …

If they were speaking to a man, they’d say:

• Idan ka kwana ba tare da barci mai kyau ba, za ka ji gajiya da safe.

Both relate to “sleep”, but they are not the same:

• kwana – to spend the night, to pass the night somewhere
  
  • Here: kika kwana = “you spend the night / you pass the night”
• barci – sleep as a noun, the state or act of sleeping
  
  • Here: barci mai kyau = “good sleep”

So the structure is literally:
If you pass the night without good sleep, you will feel tired in the morning.

You could gloss it as:

• kika kwana – “(when) you overnight”
• ba tare da barci mai kyau ba – “without good sleep”

ba tare da ... ba is a fixed structure meaning “without …”. Literally it comes from:

• tare da – “together with”
• ba … ba – a common negation frame: ba X ba = “not X”

Put together:

• ba tare da X ba – “not together with X” → without X

Examples:

• Na tafi ba tare da jakata ba. – I went without my bag.
• Yana zaune ba tare da abokai ba. – He’s living without friends.

In your sentence:

• ba tare da barci mai kyau ba – “without good sleep”

The two ba’s surround the whole “tare da …” phrase; you normally keep both of them in careful speech and writing.

You can, but the meaning changes:

• tare da barci mai kyau – with good sleep / together with good sleep
• ba tare da barci mai kyau ba – without good sleep

So:

• Idan kika kwana tare da barci mai kyau, za ki ji daɗi da safe.
  
  • If you spend the night with good sleep, you’ll feel good in the morning.

In your original sentence we want the opposite: without good sleep, so we need the negative frame ba … ba around tare da.

Literally:

• mai – a particle meaning “one that has / that possesses”
• kyau – goodness, beauty, pleasantness

So mai kyau = “one that has goodness/beauty”, and it functions like the English adjective “good / nice / beautiful” depending on context.

Examples:

• mutum mai kyau – a good / nice person
• mota mai kyau – a good / nice car
• hoto mai kyau – a beautiful / good picture
• barci mai kyau – good (quality) sleep

So barci mai kyau is literally “sleep that has goodness”.

Breakdown:

• za – future marker (“will / going to”)
• ki – you (feminine singular)
• ji – to feel, sense, hear, experience
• gajiya – tiredness, fatigue

So za ki ji gajiya = “you will feel tiredness” → “you will feel tired.”

In Hausa, ji is very flexible:

• Na ji sanyi. – I feel cold.
• Na ji zafi. – I feel hot / I feel pain.
• Na ji yunwa. – I feel hungry.
• Na ji gajiya. – I feel tired.

It can also mean “to hear”:

• Na ji muryarka. – I heard your voice.

da safe is a fixed time expression meaning “in the morning”.

• safe – morning
• da – a very flexible preposition/particle; here it works like “in/at (the time of)”

Literally: “with morning / at morning” → in the morning.

Position:

• It’s very natural in Hausa to put time expressions at the end of the sentence:
  • Za ki ji gajiya da safe. – You will feel tired in the morning.
  • Na tafi kasuwa da safe. – I went to the market in the morning.

You can move it for emphasis, but the neutral place is at or near the end of the clause.

In this kind of time phrase:

• da safe – in the morning
• da rana – in the afternoon / daytime
• da yamma – in the evening
• da dare – at night

Here safe on its own refers to the morning time. With da, it forms the adverbial “in the morning”.

So in your sentence, da safe clearly means “in the morning.”

Yes, you will see both spellings:

• barci
• bacci

They represent the same word (“sleep”), just different orthographic conventions. Many modern materials prefer barci, but bacci is still very common in writing and everyday use.

So:

• barci mai kyau = bacci mai kyau – good sleep

The grammar and meaning don’t change.

Hausa conditionals with idan often use a perfective-like form in the “if” clause, even when English would naturally use a present:

• Idan ka ci abinci, za ka ji daɗi.
  If you eat food, you will feel good.

• Idan kika kwana ba tare da barci mai kyau ba, za ki ji gajiya da safe.
  If you sleep / if you spend the night without good sleep, you will feel tired in the morning.

The idea is:
“If it (the action in the if‑clause) happens / is completed, then the other thing will follow.”

So even though English uses a “present” in the if‑clause, Hausa commonly uses this perfective/conditional pattern (kika kwana, ka ci, etc.).

Yes. A common alternative is to negate the sleeping directly, e.g.:

• Idan baki yi barci mai kyau ba, za ki ji gajiya da safe.
  If you don’t sleep well, you will feel tired in the morning.

Compare:

• Idan kika kwana ba tare da barci mai kyau ba …
  – If you spend the night without good sleep …

• Idan baki yi barci mai kyau ba …
  – If you don’t sleep well …

The nuance is slightly different (noun phrase “without sleep” vs. verb “don’t sleep”), but in everyday use they communicate essentially the same idea.