#!/usr/bin/env bash

set -uo pipefail

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

report_header()
{
	echo "++++++++++++++++++++++++++++++++++++++++++++++++++++"
	echo $NAME
	echo "++++++++++++++++++++++++++++++++++++++++++++++++++++"
	echo "++++ test input:"
}

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

todo_report()
{
	NAME="todo: $NAME"
	report_header
	cat /tmp/input.minishell
	echo "++++ Got output:"
	cat /tmp/got.minishell
	echo "++++ But test was marked as todo."
	echo "++++ Run this to debug:"
	cat < /tmp/input.minishell > /tmp/input.todo.$TODO.minishell
	echo "cat /tmp/input.todo.$TODO.minishell | ./minishell"
}

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

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
}

todo()
{
	echo -n "t"
	TODO+=1
	todo_report >> report.txt
}

setup()
{
	rm -f report.txt
}

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

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 "single redirection is parsed"
echo hello>outfile
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]
     │       │               ╰─ t_redir_list
     │       │                   ╰─ redirection[0]
     │       │                       ╰─ t_redirection
     │       │                           ├─ t_redir_type = REDIR_OUTPUT
     │       │                           ╰─ marker = [outfile]
     │       ╰─ 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
     │       │                   │       ├─ t_redir_type = REDIR_INPUT
     │       │                   │       ╰─ marker = [in]
     │       │                   ╰─ redirection[1]
     │       │                       ╰─ t_redirection
     │       │                           ├─ t_redir_type = REDIR_OUTPUT
     │       │                           ╰─ marker = [out]
     │       ╰─ t_operator = END
     ╰─ (no redirections)
EOF

when_run <<EOF "multiple redirections are parsed"
echo << HERE_DOC hello>outfile there < infile < infile2 >> append
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][there]
     │       │               ╰─ t_redir_list
     │       │                   ├─ redirection[0]
     │       │                   │   ╰─ t_redirection
     │       │                   │       ├─ t_redir_type = REDIR_HERE_DOC
     │       │                   │       ╰─ marker = [HERE_DOC]
     │       │                   ├─ redirection[1]
     │       │                   │   ╰─ t_redirection
     │       │                   │       ├─ t_redir_type = REDIR_OUTPUT
     │       │                   │       ╰─ marker = [outfile]
     │       │                   ├─ redirection[2]
     │       │                   │   ╰─ t_redirection
     │       │                   │       ├─ t_redir_type = REDIR_INPUT
     │       │                   │       ╰─ marker = [infile]
     │       │                   ├─ redirection[3]
     │       │                   │   ╰─ t_redirection
     │       │                   │       ├─ t_redir_type = REDIR_INPUT
     │       │                   │       ╰─ marker = [infile2]
     │       │                   ╰─ redirection[4]
     │       │                       ╰─ t_redirection
     │       │                           ├─ t_redir_type = REDIR_APPEND
     │       │                           ╰─ marker = [append]
     │       ╰─ t_operator = END
     ╰─ (no redirections)
EOF

when_run <<EOF "a single command in parentheses is has the parenthesis implicitly removed"
(echo hi)
EOF
# this is how it is handled in bash:
# doing a `ps uf` on bash running `sleep 10`
# \_ bash --norc
#     \_ sleep 10
# and `(sleep 10)`
# \_ bash --norc
#     \_ sleep 10
# this is exactly the same process graph
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][hi]
     │       │               ╰─ (no redirections)
     │       ╰─ t_operator = END
     ╰─ (no redirections)
EOF

when_run <<EOF "a single cmdlist in parenthesis has the parenthesis implicitly removed"
(echo hi >> append | echo < infile bye && echo hello > outfile)
EOF
expecting <<EOF
 ╰─ t_cmdgroup
     ├─ t_cmdlist
     │   ├─ num_cmds = 2
     │   ├─ cmd[0]
     │   │   ├─ t_cmdlist_item
     │   │   │   ╰─ t_pipeline
     │   │   │       ├─ num_cmd = 2
     │   │   │       ├─ cmd[0]
     │   │   │       │   ╰─ t_simple_cmd
     │   │   │       │       ├─ words = [echo][hi]
     │   │   │       │       ╰─ t_redir_list
     │   │   │       │           ╰─ redirection[0]
     │   │   │       │               ╰─ t_redirection
     │   │   │       │                   ├─ t_redir_type = REDIR_APPEND
     │   │   │       │                   ╰─ marker = [append]
     │   │   │       ╰─ cmd[1]
     │   │   │           ╰─ t_simple_cmd
     │   │   │               ├─ words = [echo][bye]
     │   │   │               ╰─ t_redir_list
     │   │   │                   ╰─ redirection[0]
     │   │   │                       ╰─ t_redirection
     │   │   │                           ├─ t_redir_type = REDIR_INPUT
     │   │   │                           ╰─ marker = [infile]
     │   │   ╰─ t_operator = AND
     │   ╰─ cmd[1]
     │       ├─ t_cmdlist_item
     │       │   ╰─ t_pipeline
     │       │       ├─ num_cmd = 1
     │       │       ╰─ cmd[0]
     │       │           ╰─ t_simple_cmd
     │       │               ├─ words = [echo][hello]
     │       │               ╰─ t_redir_list
     │       │                   ╰─ redirection[0]
     │       │                       ╰─ t_redirection
     │       │                           ├─ t_redir_type = REDIR_OUTPUT
     │       │                           ╰─ marker = [outfile]
     │       ╰─ t_operator = END
     ╰─ (no redirections)
EOF

when_run <<EOF "quoted parentheses are not operators"
echo unclosed '('
EOF
todo

finalize