# cmake/voicecat-toolchain.cmake — vcpkg toolchain wrapper with auto-triplet.
#
# Wraps vcpkg's toolchain to auto-resolve VCPKG_HOST_TRIPLET and VCPKG_TARGET_TRIPLET
# from the host platform, so the main presets (dev, release, server-release) build on
# Windows/MinGW, Linux, and macOS without per-OS preset variants.
#
# Triplet mapping (auto):
#   Windows       → x64-mingw-static   (the project's toolchain is MSYS2/UCRT64 — see
#                                       clients/windows/README.md; MSVC users must set
#                                       VCPKG_TARGET_TRIPLET=x64-windows explicitly)
#   Linux  x64    → x64-linux
#   Linux  arm64  → arm64-linux
#   macOS  arm64  → arm64-osx          (Apple Silicon)
#   macOS  x64    → x64-osx            (Intel)
#
# Cross-compile presets (apple-ios, apple-ios-sim) set VCPKG_TARGET_TRIPLET explicitly
# in their cacheVariables; the DEFINED guards below preserve those. VCPKG_HOST_TRIPLET
# is always the host's (e.g. arm64-osx when cross-compiling iOS on Apple Silicon).
#
# Resolution order: an explicit VCPKG_ROOT env var always wins (for developers pointing at
# their own external vcpkg checkout); otherwise this falls back to the bundled submodule at
# <repo-root>/vcpkg (`git submodule update --init vcpkg`).

# ── Host triplet (the platform running vcpkg / the build) ─────────────────────
if(NOT DEFINED VCPKG_HOST_TRIPLET)
    if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows")
        set(_voicecat_host "x64-mingw-static")
    elseif(CMAKE_HOST_SYSTEM_NAME STREQUAL "Linux")
        if(CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "aarch64|arm64")
            set(_voicecat_host "arm64-linux")
        else()
            set(_voicecat_host "x64-linux")
        endif()
    elseif(CMAKE_HOST_SYSTEM_NAME STREQUAL "Darwin")
        if(CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "aarch64|arm64")
            set(_voicecat_host "arm64-osx")
        else()
            set(_voicecat_host "x64-osx")
        endif()
    endif()
    if(_voicecat_host)
        set(VCPKG_HOST_TRIPLET "${_voicecat_host}" CACHE STRING "vcpkg host triplet (auto-resolved)")
    endif()
    unset(_voicecat_host)
endif()

# ── Target triplet (the platform being built for) ─────────────────────────────
# Auto-resolve only when not explicitly set. Cross-compile presets (apple-ios,
# apple-ios-sim) set VCPKG_TARGET_TRIPLET in their cacheVariables; the DEFINED
# guard preserves those so they win over the auto-detection.
if(NOT DEFINED VCPKG_TARGET_TRIPLET)
    if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows")
        set(_voicecat_target "x64-mingw-static")
    elseif(CMAKE_HOST_SYSTEM_NAME STREQUAL "Linux")
        if(CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "aarch64|arm64")
            set(_voicecat_target "arm64-linux")
        else()
            set(_voicecat_target "x64-linux")
        endif()
    elseif(CMAKE_HOST_SYSTEM_NAME STREQUAL "Darwin")
        if(CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "aarch64|arm64")
            set(_voicecat_target "arm64-osx")
        else()
            set(_voicecat_target "x64-osx")
        endif()
    endif()
    if(_voicecat_target)
        set(VCPKG_TARGET_TRIPLET "${_voicecat_target}" CACHE STRING "vcpkg target triplet (auto-resolved)")
    endif()
    unset(_voicecat_target)
endif()

# ── Overlay triplets — project-local overrides take precedence ────────────────
# Enables custom triplets (e.g. release-only x64-linux/arm64-linux, iOS slices)
# without needing to fork vcpkg's built-in ones.  Cross-compile presets that
# already set VCPKG_OVERLAY_TRIPLETS explicitly (apple-ios, apple-ios-sim) keep
# their own value via the DEFINED guard.
if(NOT DEFINED VCPKG_OVERLAY_TRIPLETS)
    set(VCPKG_OVERLAY_TRIPLETS "${CMAKE_CURRENT_LIST_DIR}/vcpkg-overlays/triplets"
        CACHE STRING "vcpkg overlay triplets directory")
endif()

# ── Resolve vcpkg root ──────────────────────────────────────────────────────────
if(DEFINED ENV{VCPKG_ROOT} AND NOT "$ENV{VCPKG_ROOT}" STREQUAL "")
    set(_voicecat_vcpkg_root "$ENV{VCPKG_ROOT}")
else()
    set(_voicecat_vcpkg_root "${CMAKE_CURRENT_LIST_DIR}/../vcpkg")
endif()

if(NOT EXISTS "${_voicecat_vcpkg_root}/scripts/buildsystems/vcpkg.cmake")
    message(FATAL_ERROR
        "vcpkg not found at '${_voicecat_vcpkg_root}'.\n"
        "Either init the bundled submodule:\n"
        "  git submodule update --init vcpkg\n"
        "or point VCPKG_ROOT at an external vcpkg checkout.")
endif()

# ── Hand off to the real vcpkg toolchain ──────────────────────────────────────
include("${_voicecat_vcpkg_root}/scripts/buildsystems/vcpkg.cmake")
unset(_voicecat_vcpkg_root)