#!/usr/bin/env bash

set -uo pipefail

declare -i FAILED=0
declare -i SUCCEDED=0
declare -i RAN=0
NAME=""

failed_report()
{
	echo "++++++++++++++++++++++++++++++++++++++++++++++++++++"
	echo $NAME
	echo "++++++++++++++++++++++++++++++++++++++++++++++++++++"
	echo "++++ Failed test:"
	cat /tmp/input.minishell
	echo "++++ Got output:"
	cat /tmp/got.minishell
	echo "++++ But expected:"
	cat /tmp/expected.minishell
	echo "++++ Diff:"
	echo "(red is got, green is expected)"
	diff --color=always /tmp/got.minishell /tmp/expected.minishell
	echo "++++ Run this to debug:"
	echo "echo '$(cat /tmp/input.minishell)' | ./minishell"
}

failed()
{
	failed_report >> report.txt
	echo -n "F"
	FAILED+=1
}

succeded()
{
	echo -n "."
	SUCCEDED+=1
}

assert()
{
	diff -q /tmp/got.minishell /tmp/expected.minishell > /dev/null && succeded || failed
}

when_run()
{
	cat > /tmp/input.minishell
	./minishell &> /tmp/got.minishell < /tmp/input.minishell
	RAN+=1
	NAME=$1
}

expecting()
{
	cat > /tmp/expected.minishell
	assert
}

setup()
{
	rm -f report.txt
}

finalize()
{
	echo
	echo "$RAN tests ran. $SUCCEDED succeded, $FAILED failed."
	if [ $SUCCEDED -eq $RAN ];
	then
		echo "All integration tests passed!"
	else
		echo "cat report.txt"
		echo "to see details of failed tests"
	fi
}

setup

when_run <<EOF "empty inputs returns nothing"

EOF
expecting <<EOF
EOF

when_run <<EOF "simple command is parsed"
echo hello
EOF
expecting <<EOF
 ╰─ t_cmdgroup
     ├─ t_cmdlist
     │   ├─ num_cmds = 1
     │   ╰─ cmd[0]
     │       ├─ t_cmdlist_item
     │       │   ╰─ t_pipeline
     │       │       ├─ num_cmd = 1
     │       │       ╰─ cmd[0]
     │       │           ╰─ t_simple_cmd
     │       │               ├─ words = [echo][hello]
     │       │               ╰─ (no redirections)
     │       ╰─ t_operator = END
     ╰─ (no redirections)
EOF

when_run <<EOF "redirections are parsed"
echo hello < in hi > out
EOF
expecting <<EOF
 ╰─ t_cmdgroup
     ├─ t_cmdlist
     │   ├─ num_cmds = 1
     │   ╰─ cmd[0]
     │       ├─ t_cmdlist_item
     │       │   ╰─ t_pipeline
     │       │       ├─ num_cmd = 1
     │       │       ╰─ cmd[0]
     │       │           ╰─ t_simple_cmd
     │       │               ├─ words = [echo][hello][hi]
     │       │               ╰─ t_redir_list
     │       │                   ├─ redirection[0]
     │       │                   │   ╰─ t_redirection
     │       │                   ╰─ redirection[1]
     │       │                       ╰─ t_redirection
     │       ╰─ t_operator = END
     ╰─ (no redirections)
EOF

finalize