#!/bin/bash

usage ()
{
    echo "Usage:$0 <URL-to-test>"
}

if [ $# -lt 1 ]; then
    echo "Error: No test URL given." >&2
    echo "" >&2
    usage >&2
    exit 1
fi

URL=$1
CURL="curl --silent --show-error"

_TEST_SECTION()
{
    echo ""
    echo $1
    echo $1 | sed -e "s/./$2/g"
}

TEST_SECTION()
{
    _TEST_SECTION "$1" =
}

TEST_SUBSECTION()
{
    _TEST_SECTION "$1" -
}

TEST()
{
    printf "    $1"
    printf "%*s" $(( 52 - ${#1} )) | tr ' ' '.'
    (( tests_total++ )) || true
}

# Result of test depends on the exit status of last command
TEST_END()
{
    if [ $? -eq 0 ]; then
        echo -n "OK"
    else
        (( tests_failed++ )) || true
        echo -n "FAIL"
    fi

    # If we got an argument, append it after test result
    if [ -n "$1" ]; then
        echo " $1"
    else
        echo ""
    fi
}

# Print report of all previous test results
TEST_REPORT()
{
    echo ""
    echo "Test Report"
    echo "==========="

    if [ "$tests_failed" == "" ]; then
        echo "All $tests_total tests passed."
        echo ""
        return 0
    else
        echo "$tests_failed of $tests_total tests failed."
        echo ""
        return 1
    fi
}

# Does a string contain a regular expression pattern
#
# Example:
#
#    contains "All's well that ends well" "s.well"
contains()
{
    grep -q "$2" <<< $1
}

# Post to a URL endpoint with optional JSON data
#
# Usage:
#
# curl_post <ENDPOINT> [data]
curl_post()
{
    $CURL -X POST ${2:+-H 'Content-Type: application/json' -d "$2"} $URL/$1
}

# Get form a URL endpoint
#
# Usage:
#
# curl_get <ENDPOINT>
curl_get()
{
    $CURL $URL/$1
}

# Create a new game of the specified engine type
#
# Usage:
#
# new_game <ENGINE>
new_game()
{
    curl_post new/$1 | jq -r .
}

TEST_SECTION "LMNO (super-site for games)"

TEST_SUBSECTION "Testing home page"
home_page=$($CURL $URL)

TEST "Contains 'Join Game'"
contains "$home_page" "Join Game"
TEST_END

TEST "Contains 'Host a new game'"
contains "$home_page" "Host a new game"
TEST_END

TEST_SUBSECTION "Creating some new games"

TEST "Empires"
empires_game_id=$(new_game empires)
test "$empires_game_id" != ""
TEST_END $empires_game_id

TEST "Tic Tac Toe"
tictactoe_game_id=$(new_game tictactoe)
test "$tictactoe_game_id" != ""
TEST_END $tictactoe_game_id

TEST_SECTION "Empires game"

empires_game_path=empires/$empires_game_id

TEST_SUBSECTION "Empires game /register"

empires_register()
{
    curl_post $empires_game_path/register "{\"name\": \"$1\", \"character\": \"$2\"}"
}

empires_players_string()
{
    curl_get $empires_game_path/players | jq -r .[].name | tr '\n' ','
}

empires_characters_string()
{
    curl_get $empires_game_path/characters | jq -r .[] | tr '\n' ','
}

TEST "Registering a player returns an ID"
carl_id=$(empires_register Carl "Bugs Bunny" | jq -r .)
test "$carl_id" = "1"
TEST_END

TEST "Registering several more players"
empires_register Richard "Bob Hope" > /dev/null
empires_register Kevin "Elvis Presley" > /dev/null
empires_register Stacy Phineas > /dev/null
empires_register David "Red Power Ranger" > /dev/null
empires_register Nancy "Audrey Hepburn" > /dev/null
bogus_id=$(empires_register Bogus "Mr. Bogus")
TEST_END

TEST 'Verify complete players list (with "Bogus")'
players=$(empires_players_string)
test "$players" = "Carl,Richard,Kevin,Stacy,David,Nancy,Bogus,"
TEST_END

TEST 'Verify complete players list (with "Mr. Bogus")'
characters=$(empires_characters_string)
test "$characters" = "Bugs Bunny,Bob Hope,Elvis Presley,Phineas,Red Power Ranger,Audrey Hepburn,Mr. Bogus,"
TEST_END

TEST_SUBSECTION "Empires game /deregister"

empires_deregister()
{
    curl_post $empires_game_path/deregister/$1
}

TEST "Removing the bogus player"
empires_deregister $bogus_id
TEST_END

TEST 'Verify modified players list (w/o "Bogus")"'
players=$(empires_players_string)
test "$players" = "Carl,Richard,Kevin,Stacy,David,Nancy,"
TEST_END

TEST 'Verify modified characters list (w/o "Mr. Bogus")'
characters=$(empires_characters_string)
test "$characters" = "Bugs Bunny,Bob Hope,Elvis Presley,Phineas,Red Power Ranger,Audrey Hepburn,"
TEST_END

TEST_SUBSECTION "Empires game /capture"

empires_capture()
{
    curl_post $empires_game_path/capture/$1/$2
}

empires_empires_string()
{
    # Get empires as a compact string (much more compact than JSON)
    curl_get $empires_game_path/empires | jq -c '.[] | [.id,.captures]' | tr '\n' ','
}

TEST "Verify empires before any captures"
empires=$(empires_empires_string)
test "$empires" = "[1,[]],[2,[]],[3,[]],[4,[]],[5,[]],[6,[]],"
TEST_END

TEST "Perform some captures"
empires_capture 1 2
empires_capture 3 5
empires_capture 4 6
empires_capture 3 4
TEST_END

TEST "Verify empires after captures"
empires=$(empires_empires_string)
test "$empires" = "[1,[2]],[2,[]],[3,[5,4]],[4,[6]],[5,[]],[6,[]],"
TEST_END

TEST_SUBSECTION "Empires game /liberate"

empires_liberate()
{
    curl_post $empires_game_path/liberate/$1
}

TEST "Liberate a player"
empires_liberate 2
TEST_END

TEST "Verify empires after liberate"
empires=$(empires_empires_string)
test "$empires" = "[1,[]],[2,[]],[3,[5,4]],[4,[6]],[5,[]],[6,[]],"
TEST_END

TEST_SUBSECTION "Empires game /reset"

empires_reset()
{
    curl_post $empires_game_path/reset
}

TEST "Reset the game"
empires_reset
TEST_END

TEST "Verify players is now empty"
players=$(empires_players_string)
test "$players" = ""
TEST_END

TEST_REPORT