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#!/bin/sh

# Usage function to display script options
usage() {
  echo "Find files using ripgrep and open them in Neovim."
  echo ""
  echo "Usage: ${0##*/} [-s] [-i] [-l] [-p] [<tag>] <query>"
  echo ""
  echo "Options:"
  echo "  -h                  : Show this message"
  echo "  -i                  : Perform a case-insensitive search (default)"
  echo "  -l                  : List files associated with the given tag"
  echo "  -p                  : Search for files in the specified project directories using the specified tag (default: PROJECT)"
  echo "  -s                  : Perform a case-sensitive search"
  echo "  [<tag>] <query>     : Optional tag for project mode, followed by the search query"
  echo ""
  echo "Examples:"
  echo "  ${0##*/} -p TODO 'KEYWORD'      # Search for 'KEYWORD' in files tagged with 'TODO' in the project directories"
  echo "  ${0##*/} -l -p 'KEYWORD'        # List files associated with the default 'PROJECT' tag and 'KEYWORD'"
  echo "  ${0##*/} 'KEYWORD'              # Open files containing 'KEYWORD' in nvim"
  exit 0
}

search_term() {
  case_flag="$1"
  shift

  if ! command -v rga >/dev/null 2>&1; then
    echo "Error: 'rga' is not installed." >&2
    exit 1
  fi
  if ! command -v xclip >/dev/null 2>&1; then
    echo "Error: 'xclip' is not installed." >&2
    exit 1
  fi

  # Construct the preview command
  preview_cmd=$(printf "rga %s --pretty --context 10 '%s' {}" "$case_flag" "$*")
  query="$*"
  rga_output=$(rga --follow --no-ignore --hidden --text --max-count=1 ${case_flag:+$case_flag} --files-with-matches --no-messages \
    --glob '!**/.cache/*' \
    --glob '!**/.git/*' \
    --glob '!**/.github/*' \
    --glob '!**/.next/*' \
    --glob '!**/.venv/*' \
    --glob '!**/build/*' \
    --glob '!**/coverage/*' \
    --glob '!**/dist/*' \
    --glob '!**/node_modules/*' \
    --glob '!**/target/*' \
    --glob '!**/vendor/*' \
    --glob '!**/venv/*' \
    "$query")

  # Use fzf to select files
  files=$(echo "$rga_output" | fzf-tmux +m --preview="$preview_cmd" --reverse --multi --select-1 --exit-0) || return 1

  # Check if files are selected
  if [ -z "$files" ]; then
    echo "No files selected."
    return 0
  fi

  # copy target to the clipboard
  echo "$query" | xclip -selection clipboard 2>/dev/null

  # Open files at matching lines
  count=$(echo "$files" | wc -l)
  if [ "$count" -eq 1 ]; then
    # Find the first matching line number in the selected file
    line=$(rga --max-count=1 --line-number --no-filename ${case_flag:+$case_flag} --no-messages "$query" "$files" 2>/dev/null | head -1 | cut -d: -f1)
    if [ -n "$line" ]; then
      ${EDITOR:-nvim} "+${line}" "$(realpath "$files")"
    else
      openfiles "$files"
    fi
  else
    # Multiple files: build quickfix entries for line-accurate navigation
    tmpfile=$(mktemp)
    echo "$files" | while IFS= read -r file; do
      match=$(rga --max-count=1 --line-number --no-filename ${case_flag:+$case_flag} --no-messages "$query" "$file" 2>/dev/null | head -1)
      if [ -n "$match" ]; then
        printf '%s:%s\n' "$file" "$match" >> "$tmpfile"
      else
        printf '%s:1:\n' "$file" >> "$tmpfile"
      fi
    done
    ${EDITOR:-nvim} -q "$tmpfile"
    rm -f "$tmpfile"
  fi

  # print the file names
  echo "$rga_output"
}

# Function to list and/or open all files associated with a given project tag
list_or_open_project_files() {
  # Use the provided tag or default to "PROJECT"
  project_tag="${1:-PROJECT}: $2"

  # Define the project paths as a space-separated string
  project_paths="$HOME/.dotfiles $HOME/.local/src/suckless $HOME/Public/repos"

  # Use rga to find files containing the project tag across all project paths
  rga_output=""
  for path in $project_paths; do
    if [ -d "$path" ]; then
      rga_result=$(rga --follow --no-ignore --hidden --text --max-count=1 --files-with-matches --no-messages \
        --glob '!**/.cache/*' \
        --glob '!**/.git/*' \
        --glob '!**/.github/*' \
        --glob '!**/.next/*' \
        --glob '!**/.venv/*' \
        --glob '!**/build/*' \
        --glob '!**/coverage/*' \
        --glob '!**/dist/*' \
        --glob '!**/node_modules/*' \
        --glob '!**/target/*' \
        --glob '!**/vendor/*' \
        --glob '!**/venv/*' \
        "$project_tag" "$path")
      rga_output="$rga_output $rga_result"
    fi
  done

  # Remove leading/trailing whitespace
  rga_output=$(echo "$rga_output" | sed 's/^[[:space:]]*//;s/[[:space:]]*$//')

  # Check if any files were found
  if [ -z "$rga_output" ]; then
    echo "No files found for tag $project_tag."
    return 0
  fi

  # If the script was called in list mode, simply print the files
  if [ "$list_mode" -eq 1 ]; then
    echo "$rga_output"
  else
    # Open files at matching lines
    file_count=$(echo "$rga_output" | wc -w)
    if [ "$file_count" -eq 1 ]; then
      line=$(rga --max-count=1 --line-number --no-filename --no-messages "$project_tag" "$rga_output" 2>/dev/null | head -1 | cut -d: -f1)
      if [ -n "$line" ]; then
        ${EDITOR:-nvim} "+${line}" "$(realpath "$rga_output")"
      else
        openfiles "$rga_output"
      fi
    else
      # Multiple files: build quickfix entries for line-accurate navigation
      tmpfile=$(mktemp)
      for file in $rga_output; do
        match=$(rga --max-count=1 --line-number --no-filename --no-messages "$project_tag" "$file" 2>/dev/null | head -1)
        if [ -n "$match" ]; then
          printf '%s:%s\n' "$file" "$match" >> "$tmpfile"
        else
          printf '%s:1:\n' "$file" >> "$tmpfile"
        fi
      done
      ${EDITOR:-nvim} -q "$tmpfile"
      rm -f "$tmpfile"
    fi
  fi
}

# Main function to handle options
case_flag="--ignore-case" # Default to case-insensitive
list_mode=0
project_mode=0

# Parse the options
while getopts "silph" opt; do
  case $opt in
  s) case_flag="--case-sensitive" ;; # Case-sensitive
  i) case_flag="--ignore-case" ;;    # Case-insensitive
  l) list_mode=1 ;;                  # List mode
  p) project_mode=1 ;;               # Project mode
  h) usage ;;
  *) ;;
  esac
done

shift $((OPTIND - 1))

# Handle project mode search
if [ "$project_mode" -eq 1 ]; then
  list_or_open_project_files "$1" "$2"
else
  # Otherwise, call the common search function
  search_term "$case_flag" "$@"
fi