# ==============================================================================
# Find httplib
# ==============================================================================
# This module fetches the cpp-httplib HTTP library.
#
# Targets provided:
#   httplib::httplib - The httplib library target
#
# Variables set:
#   httplib_FOUND       - TRUE if httplib is available
#   httplib_LIBRARIES   - The httplib library target (httplib::httplib)
#   httplib_INCLUDE_DIR - Include directories for httplib
#   httplib_VERSION     - Version of httplib
# ==============================================================================

if (DEFINED _FINDHTTPLIB_INCLUDED)
    return()
endif()
set(_FINDHTTPLIB_INCLUDED TRUE)

message(STATUS "Fetching httplib")

include(FetchContent)

# Choose fetch method depending on git availability
find_program(GIT_EXECUTABLE git)
if (GIT_EXECUTABLE)
    set(HTTPLIB_FETCH_METHOD "GIT")
else()
    set(HTTPLIB_FETCH_METHOD "ZIP")
endif()

# Disable optional compression dependencies
set(HTTPLIB_USE_ZSTD_IF_AVAILABLE OFF CACHE BOOL "" FORCE)
set(HTTPLIB_USE_BROTLI_IF_AVAILABLE OFF CACHE BOOL "" FORCE)

if (HTTPLIB_FETCH_METHOD STREQUAL "GIT")
    FetchContent_Declare(
        httplib
        GIT_REPOSITORY https://github.com/yhirose/cpp-httplib.git
        GIT_TAG        v0.28.0
    )
else()
    # GitHub release ZIP for v0.28.0
    FetchContent_Declare(
        httplib
        URL https://github.com/yhirose/cpp-httplib/archive/refs/tags/v0.28.0.zip
    )
endif()

FetchContent_MakeAvailable(httplib)

set(httplib_FOUND   TRUE)
set(httplib_VERSION "0.28.0")

# Ensure we have a usable target
if (NOT TARGET httplib::httplib)
    if (TARGET httplib)
        add_library(httplib::httplib ALIAS httplib)
    else()
        # As a last resort, create a header-only INTERFACE target around httplib.h
        message(STATUS "No 'httplib' or 'httplib::httplib' target exists. Creating a header-only target manually.")

        add_library(httplib INTERFACE)
        add_library(httplib::httplib ALIAS httplib)

        # Try to infer the include directory (where httplib.h lives)
        if (DEFINED httplib_SOURCE_DIR)
            target_include_directories(httplib INTERFACE "${httplib_SOURCE_DIR}")
        elseif (DEFINED HTTPLIB_SOURCE_DIR)
            target_include_directories(httplib INTERFACE "${HTTPLIB_SOURCE_DIR}")
        endif()
    endif()
endif()

set(httplib_FOUND     TRUE)
set(httplib_LIBRARIES httplib::httplib)

get_target_property(_httplib_inc httplib::httplib INTERFACE_INCLUDE_DIRECTORIES)
if (_httplib_inc)
    set(httplib_INCLUDE_DIR "${_httplib_inc}")
endif()

# Mark httplib includes as SYSTEM to suppress warnings from its headers
if (_httplib_inc AND TARGET httplib)
    set_target_properties(httplib PROPERTIES
        INTERFACE_SYSTEM_INCLUDE_DIRECTORIES "${_httplib_inc}"
    )
endif()

set(HTTPLIB_LICENSE_FILE "${httplib_SOURCE_DIR}/LICENSE" CACHE FILEPATH "Path to httplib license file")

message(STATUS "httplib version: ${httplib_VERSION}")