#!/bin/bash
# Query IREE build graph with Bazel.
#
# Usage: iree-bazel-query [options] <query> [bazel-args...]
#
# Examples:
#   iree-bazel-query 'deps(//tools:iree-compile)'
#   iree-bazel-query 'rdeps(//..., //runtime/src/iree/base:base)'
#   iree-bazel-query 'kind(cc_library, //runtime/...)'

set -e

# Source shared library.
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "${SCRIPT_DIR}/iree-bazel-lib"
iree_bazel_init "iree-bazel-query"

# Expand combined short flags (e.g., -nv -> -n -v).
eval "set -- $(iree_expand_combined_flags "$@")"

show_help() {
    cat << 'EOF'
iree-bazel-query - Query IREE build graph with Bazel

USAGE
    iree-bazel-query [options] <query> [bazel-args...]

OPTIONS
    -n, --dry_run    Show the bazel command without executing
    -v, --verbose    Show the bazel command before executing
    -h, --help       Show this help

    NOTE: Short flags can be combined: -nv is equivalent to -n -v

ARGUMENTS
    query          Bazel query expression (required)
    bazel-args     Additional arguments passed to bazel query

DESCRIPTION
    Queries the IREE build graph before configuration. Use this for:

    - Finding all targets matching a pattern
    - Exploring the dependency structure
    - Fast queries that don't need build configuration

    For configuration-aware queries (resolved select(), actual build
    targets), use iree-bazel-cquery instead.

EXAMPLES
    iree-bazel-query //tools:iree-compile           # Show target
    iree-bazel-query '//tools/...'                  # List all tools
    iree-bazel-query 'deps(//tools:iree-compile)'   # Show dependencies
    iree-bazel-query 'rdeps(//..., //runtime/src/iree/base:base)'
    iree-bazel-query 'kind(cc_library, //runtime/...)'
    iree-bazel-query 'somepath(//tools:iree-compile, //runtime/src/iree/vm:vm)'
    iree-bazel-query -n 'deps(//tools:iree-compile)'  # Show command only

COMMON QUERY FUNCTIONS
    deps(target)           All dependencies of target
    rdeps(universe, target) Reverse dependencies within universe
    kind(rule, pattern)    Targets of specific rule type
    somepath(from, to)     Path between two targets
    allpaths(from, to)     All paths between targets
    attr(name, pattern, targets)  Targets with matching attribute

OUTPUT OPTIONS
    --output=label         Target labels only (default)
    --output=package       Package names only
    --output=build         BUILD file contents
    --output=graph         Graphviz DOT format
    --noimplicit_deps      Exclude implicit dependencies

SEE ALSO
    iree-bazel-cquery, iree-bazel-build, iree-bazel-test, iree-bazel-run
    https://bazel.build/query/guide
EOF
}

# Parse arguments.
QUERY=""
BAZEL_ARGS=()

while [[ $# -gt 0 ]]; do
    case "${1}" in
        -h|--help)
            show_help
            exit 0
            ;;
        --agent-md|--agent_md)
            iree_show_agent_md
            exit 0
            ;;
        -n|--dry_run|--dry-run)
            IREE_BAZEL_DRY_RUN=1
            shift
            ;;
        -v|--verbose)
            IREE_BAZEL_VERBOSE=1
            shift
            ;;
        -*)
            BAZEL_ARGS+=("${1}")
            shift
            ;;
        *)
            if [[ -z "${QUERY}" ]]; then
                QUERY="${1}"
            else
                BAZEL_ARGS+=("${1}")
            fi
            shift
            ;;
    esac
done

# Query is required.
if [[ -z "${QUERY}" ]]; then
    iree_error "Query expression is required"
    echo ""
    show_help
    exit 1
fi

# Set up worktree (after arg parsing so --help works anywhere).
iree_setup_worktree

# Build the command with default configs (affects select() in build graph).
iree_bazel_build_default_configs
BAZEL_BIN=$(iree_get_bazel_command)
CMD=("${BAZEL_BIN}" query "${IREE_BAZEL_DEFAULT_CONFIGS[@]}" "${QUERY}" "${BAZEL_ARGS[@]}")

# Execute or show.
if iree_is_verbose || iree_is_dry_run; then
    iree_info "Command: ${CMD[*]}"
fi

if iree_is_dry_run; then
    exit 0
fi

iree_info "Querying: ${QUERY}"
exec "${CMD[@]}"