Grabbing Specific String Values Separated by Underscore

[Tj-Idowu]

Hello,

I am trying to figure out how to separate and categorize some files based on some string values in their name. For example, if the files are named;
X_filename_f0_r1-1_1_R1.fastq
X_filename_f0_r0-1_1_R1.fastq
X_filename_f0_r0-1_2_R1.fastq
X_filename_f0_r1-0_3_R1.fastq

X_filename_f1_r1-1_1_R1.fastq
X_filename_f1_r0-1_1_R1.fastq
X_filename_f1_r0-1_2_R1.fastq
X_filename_f1_r1-0_3_R1.fastq

X_filename_f2_r1-1_1_R1.fastq
X_filename_f2_r0-1_1_R1.fastq
X_filename_f2_r0-1_2_R1.fastq
X_filename_f2_r1-0_3_R1.fastq

X_filename_f3_r1-1_1_R1.fastq
X_filename_f3_r0-1_1_R1.fastq
X_filename_f3_r0-1_2_R1.fastq
X_filename_f3_r1-0_3_R1.fastq

How can I separate the files based on f0, f1, f2, f3 and have each category saved under a different name? Then I want to separate the same files based on the numbers after the "r" but before the underscore. There are a lot of different numbers so I can't be specific in the script about the numbers to select. These same files will then be separated again based on the number before "_R1". So in the end, I will have a category of files based on f-number then a subcategory based on r number then another subcategory under that based on a number.

Thanks