#!/usr/bin/env bash
#
# development/tests/test-calendar-vim.sh — calendar-vim integration harness (Vim).
#
# Exercises the pure-VimL diary hooks (nuwiki#diary#calendar_action /
# nuwiki#diary#calendar_sign) plus plugin/nuwiki.vim's auto-wiring of
# g:calendar_action / g:calendar_sign. A stub calendar-vim is placed on the
# runtimepath so :Calendar exists and the hooks start at calendar-vim's own
# defaults — the exact state nuwiki must detect and override.
#
# Two runs:
#   1. default      → integration ON, hooks rewired, diary paths from wiki root
#   2. opt-out       → g:nuwiki_use_calendar=0 / g:nuwiki_no_calendar=1 leave
#                      calendar-vim's defaults untouched
#
# No LSP binary is needed — the diary hooks are entirely client-side VimL.
# Exit code: 0 when all assertions pass, 1 otherwise. Skips (0) without vim.

set -euo pipefail

REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
TMP="$(mktemp -d -t nuwiki-calendar-vim-test-XXXXXX)"
trap 'rm -rf "$TMP"' EXIT

log() { printf '\033[1;34m[calendar-vim]\033[0m %s\n' "$*"; }

if ! command -v vim >/dev/null 2>&1; then
  log 'vim not installed — skipping'
  exit 0
fi

# --- Scratch wiki with one seeded diary entry (2026-05-30) ----------------
WIKI="$TMP/wiki"
mkdir -p "$WIKI/diary"
echo "= index =" > "$WIKI/index.wiki"
echo "= 2026-05-30 =" > "$WIKI/diary/2026-05-30.wiki"

# --- Stub calendar-vim ----------------------------------------------------
# Mimics the real plugin closely enough for detection + the override path:
# defines :Calendar and seeds calendar-vim's default hook names.
CAL="$TMP/calendar-vim"
mkdir -p "$CAL/plugin" "$CAL/autoload"
cat > "$CAL/plugin/calendar.vim" <<'EOF'
if exists('g:loaded_calendar_stub') | finish | endif
let g:loaded_calendar_stub = 1
let g:calendar_action = get(g:, 'calendar_action', 'calendar#diary')
let g:calendar_sign   = get(g:, 'calendar_sign', 'calendar#sign')
command! -nargs=* Calendar echo 'stub calendar'
EOF
cat > "$CAL/autoload/calendar.vim" <<'EOF'
function! calendar#open(...) abort
endfunction
function! calendar#diary(...) abort
endfunction
function! calendar#sign(...) abort
  return 0
endfunction
EOF

run_harness() {
  local label="$1" vimrc="$2" harness="$3"
  local results="$TMP/results-$label.txt"
  log "running $label harness…"
  NUWIKI_CALENDAR_RESULTS="$results" \
  NUWIKI_CALENDAR_WIKI="$WIKI" \
    timeout 30 vim -e -s -u "$vimrc" -c "edit $WIKI/index.wiki" \
      -c "source $harness" </dev/null >"$TMP/$label.log" 2>&1 || true
  if [[ ! -f "$results" ]]; then
    echo "calendar $label harness produced no output" >&2
    echo "--- vim log ---" >&2
    cat "$TMP/$label.log" >&2 || true
    return 1
  fi
  cat "$results"
  grep -qE '^SUMMARY: [0-9]+ passed, 0 failed' "$results"
}

# --- Run 1: default (integration ON) --------------------------------------
VIMRC="$TMP/vimrc"
cat > "$VIMRC" <<EOF
set nocompatible
let &runtimepath = '$REPO_ROOT' . ',' . &runtimepath
let &runtimepath .= ',$CAL'
let g:nuwiki_wiki_root = '$WIKI'
let g:nuwiki_file_extension = '.wiki'
let g:nuwiki_diary_rel_path = 'diary'
set hidden
filetype plugin indent on
syntax enable
EOF

# --- Run 2: opt-out via g:nuwiki_use_calendar = 0 -------------------------
VIMRC_OPTOUT="$TMP/vimrc-optout"
cat > "$VIMRC_OPTOUT" <<EOF
set nocompatible
let &runtimepath = '$REPO_ROOT' . ',' . &runtimepath
let &runtimepath .= ',$CAL'
let g:nuwiki_use_calendar = 0
let g:nuwiki_wiki_root = '$WIKI'
filetype plugin indent on
syntax enable
EOF

# --- Run 3: opt-out via g:nuwiki_no_calendar = 1 --------------------------
VIMRC_NOCAL="$TMP/vimrc-nocal"
cat > "$VIMRC_NOCAL" <<EOF
set nocompatible
let &runtimepath = '$REPO_ROOT' . ',' . &runtimepath
let &runtimepath .= ',$CAL'
let g:nuwiki_no_calendar = 1
let g:nuwiki_wiki_root = '$WIKI'
filetype plugin indent on
syntax enable
EOF

rc=0
run_harness 'default' "$VIMRC" "$REPO_ROOT/development/tests/test-calendar-vim.vim" || rc=1
run_harness 'optout-use' "$VIMRC_OPTOUT" "$REPO_ROOT/development/tests/test-calendar-vim-optout.vim" || rc=1
run_harness 'optout-no' "$VIMRC_NOCAL" "$REPO_ROOT/development/tests/test-calendar-vim-optout.vim" || rc=1

exit $rc