#!/bin/bash
# Copyright (c) Advanced Micro Devices, Inc., or its affiliates.
# SPDX-License-Identifier: MIT

# CK Logs - View container logs and build output

set -e
set -o pipefail

# Find script directory and load common utilities
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "${SCRIPT_DIR}/common.sh"

# Initialize configuration
PROJECT_ROOT=$(get_project_root "${SCRIPT_DIR}")
CONTAINER_NAME=$(get_container_name "${PROJECT_ROOT}")

# Help message
show_help() {
    cat << EOF
CK Logs - View container logs and build output

Usage: ck-logs [options] [container_name]

Options:
  -h, --help              Show this help message
  --name <name>           Specify container name
  -f, --follow            Follow log output
  -n, --tail <N>          Show last N lines (default: 100)
  --cmake                 Show CMake configuration log
  --build                 Show last build log

Arguments:
  container_name          Optional container name (default: ck_<username>_<branch>)

Environment:
  CK_CONTAINER_NAME - Override default container name

Examples:
  ck-logs                    # Show last 100 lines of container logs
  ck-logs -f                 # Follow container logs
  ck-logs -n 500             # Show last 500 lines
  ck-logs --cmake            # Show CMake configuration
  ck-logs --build            # Show build log

EOF
}

# Parse arguments
follow=false
tail_lines=100
show_cmake=false
show_build=false

while [[ $# -gt 0 ]]; do
    case $1 in
        -h|--help)
            show_help
            exit 0
            ;;
        --name)
            CONTAINER_NAME="$2"
            shift 2
            ;;
        -f|--follow)
            follow=true
            shift
            ;;
        -n|--tail)
            tail_lines="$2"
            shift 2
            ;;
        --cmake)
            show_cmake=true
            shift
            ;;
        --build)
            show_build=true
            shift
            ;;
        *)
            CONTAINER_NAME="$1"
            shift
            ;;
    esac
done

# Check if container exists
if ! container_exists "${CONTAINER_NAME}"; then
    echo "Container '${CONTAINER_NAME}' does not exist"
    exit 1
fi

# Show CMake log
if [ "$show_cmake" = true ]; then
    echo "CMake Configuration Log:"
    echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"

    if docker exec "${CONTAINER_NAME}" test -f /workspace/build/CMakeCache.txt 2>/dev/null; then
        docker exec "${CONTAINER_NAME}" bash -c "
            cd /workspace/build
            echo 'GPU_TARGETS:' \$(grep 'GPU_TARGETS:' CMakeCache.txt | cut -d'=' -f2)
            echo 'CMAKE_BUILD_TYPE:' \$(grep 'CMAKE_BUILD_TYPE:' CMakeCache.txt | cut -d'=' -f2)
            echo 'CMAKE_CXX_COMPILER:' \$(grep 'CMAKE_CXX_COMPILER:' CMakeCache.txt | cut -d'=' -f2)
            echo 'BUILD_TESTING:' \$(grep 'BUILD_TESTING:' CMakeCache.txt | cut -d'=' -f2)
        "
    else
        echo "CMake not configured yet"
    fi
    exit 0
fi

# Show build log (last build output)
if [ "$show_build" = true ]; then
    echo "Last Build Log:"
    echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"

    if docker exec "${CONTAINER_NAME}" test -f /workspace/build/.ninja_log 2>/dev/null; then
        docker exec "${CONTAINER_NAME}" bash -c "tail -50 /workspace/build/.ninja_log"
    else
        echo "No build log found"
    fi
    exit 0
fi

# Show container logs
echo "Container Logs (${CONTAINER_NAME}):"
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"

if [ "$follow" = true ]; then
    docker logs -f "${CONTAINER_NAME}"
else
    docker logs --tail "${tail_lines}" "${CONTAINER_NAME}"
fi