# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

# When building for iOS we want to include the Glean iOS SDK on the build as well.
# Instead of using it out of the box, we want it to be linked to the qtglean_ffi target,
# so we generate the SDK oursevels.

enable_language(Swift)
include(${CMAKE_SOURCE_DIR}/scripts/cmake/rustlang.cmake)

set(GLEAN_VENDORED_PATH ${CMAKE_SOURCE_DIR}/3rdparty/glean)

add_library(iosglean SHARED)

if(NOT MSVC AND NOT IOS)
  target_compile_options(iosglean PRIVATE -Wall -Werror -Wno-conversion)
endif()

target_include_directories(iosglean PUBLIC ${CMAKE_SOURCE_DIR})
target_include_directories(iosglean PUBLIC ${CMAKE_CURRENT_BINARY_DIR})
target_include_directories(iosglean PUBLIC ${CMAKE_CURRENT_BINARY_DIR}/glean)

set_target_properties(iosglean PROPERTIES
    FRAMEWORK TRUE
    MACOSX_FRAMEWORK_IDENTIFIER "${BUILD_IOS_APP_IDENTIFIER}.iosglean"
    MACOSX_FRAMEWORK_BUNDLE_VERSION "${BUILD_ID}"
    MACOSX_FRAMEWORK_COPYRIGHT "MPL-2.0"
    MACOSX_FRAMEWORK_INFO_STRING "IOSGlean"
    MACOSX_FRAMEWORK_LONG_VERSION_STRING "${CMAKE_PROJECT_VERSION}-${BUILD_ID}"
    MACOSX_FRAMEWORK_SHORT_VERSION_STRING "${CMAKE_PROJECT_VERSION}"
    MACOSX_FRAMEWORK_ICON_FILE "AppIcon"
    OUTPUT_NAME "IOSGlean"
    FOLDER "Libs"
    XCODE_ATTRIBUTE_SWIFT_VERSION "5.0"
    XCODE_ATTRIBUTE_CLANG_ENABLE_MODULES "YES"
    XCODE_ATTRIBUTE_SWIFT_OBJC_BRIDGING_HEADER "${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Glean.h"
    XCODE_ATTRIBUTE_SWIFT_PRECOMPILE_BRIDGING_HEADER "NO"
    XCODE_ATTRIBUTE_SKIP_INSTALL "YES"
    PUBLIC_HEADER "${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Glean.h;${CMAKE_CURRENT_BINARY_DIR}/glean/gleanFFI.h"
    # Do not strip debug symbols on copy
    XCODE_ATTRIBUTE_COPY_PHASE_STRIP "NO"
    XCODE_ATTRIBUTE_STRIP_INSTALLED_PRODUCT "NO"
)

target_sources(iosglean PRIVATE
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Config/Configuration.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Debug/GleanDebugTools.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Dispatchers.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Glean.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/GleanMetrics.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/GleanMetrics.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Info.plist
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Metrics/BooleanMetric.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Metrics/CounterMetric.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Metrics/DatetimeMetric.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Metrics/EventMetric.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Metrics/LabeledMetric.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Metrics/MemoryDistributionMetric.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Metrics/ObjectMetric.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Metrics/Ping.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Metrics/QuantityMetric.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Metrics/RateMetric.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Metrics/StringListMetric.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Metrics/StringMetric.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Metrics/TextMetric.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Metrics/TimespanMetric.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Metrics/TimingDistributionMetric.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Metrics/UrlMetric.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Metrics/UuidMetric.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Net/HttpPingUploader.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Net/PingUploader.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Net/PingUploadScheduler.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Scheduler/GleanLifecycleObserver.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Scheduler/MetricsPingScheduler.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Utils/Logger.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Utils/Sysctl.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Utils/Unreachable.swift
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Utils/Utils.swift
)
target_sources(iosglean PUBLIC
    ${GLEAN_VENDORED_PATH}/glean-core/ios/Glean/Glean.h
)

message(STATUS "Building Glean Rust library...")
execute_process(
    COMMAND ${CARGO_BUILD_TOOL} build --release
    WORKING_DIRECTORY ${GLEAN_VENDORED_PATH}/glean-core/bundle
    RESULT_VARIABLE CARGO_BUILD_RESULT
    COMMAND_ERROR_IS_FATAL ANY
)

if(NOT CARGO_BUILD_RESULT EQUAL 0)
    message(FATAL_ERROR "Failed to build Glean Rust library")
endif()
message(STATUS "Glean Rust library built successfully")

# Build gleanFFI.h and glean.swift files using UniFFI
# and build the internal Glean metrics file
execute_process(
    COMMAND ${CMAKE_COMMAND} -E env
        ${CARGO_BUILD_TOOL} run --manifest-path ${GLEAN_VENDORED_PATH}/tools/embedded-uniffi-bindgen/Cargo.toml
            -- generate --language swift --out-dir ${CMAKE_CURRENT_BINARY_DIR}/glean
            ${GLEAN_VENDORED_PATH}/glean-core/src/glean.udl
    COMMAND ${PYTHON_EXECUTABLE} -m glean_parser translate -f swift
            -o ${CMAKE_CURRENT_BINARY_DIR}/glean/generated --allow-reserved
            ${GLEAN_VENDORED_PATH}/glean-core/metrics.yaml ${GLEAN_VENDORED_PATH}/glean-core/pings.yaml
    COMMAND_ERROR_IS_FATAL ANY
)
target_sources(iosglean PRIVATE
    ${CMAKE_CURRENT_BINARY_DIR}/glean/gleanFFI.modulemap
    ${CMAKE_CURRENT_BINARY_DIR}/glean/glean.swift
    ${CMAKE_CURRENT_BINARY_DIR}/glean/generated/Metrics.swift
)
target_sources(iosglean PUBLIC
    ${CMAKE_CURRENT_BINARY_DIR}/glean/gleanFFI.h
)

# This is a horrible, horrible hack.
# Metrics.yaml is used for all platforms. Unfortunately, iOS's Glean SDK does not support custom distributions.
# While we use a custom Glean for the main iOS app, we use stock Glean SDK for the network extension. Thus,
# we need to remove the metrics of `custom distribution` type before VPNMetrics.swift is created, otherwise
# we will get compile errors.
add_custom_command(
    OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/generated/iosmetrics.yaml
    COMMAND sed '/data_transferred_tx/,/histogram_type/d' ${CMAKE_SOURCE_DIR}/src/telemetry/metrics.yaml > ${CMAKE_CURRENT_BINARY_DIR}/generated/temp.yaml
    COMMAND sed '/data_transferred_rx/,/histogram_type/d' ${CMAKE_CURRENT_BINARY_DIR}/generated/temp.yaml > ${CMAKE_CURRENT_BINARY_DIR}/generated/iosmetrics.yaml
)

list(APPEND PINGS_LIST ${CMAKE_SOURCE_DIR}/src/telemetry/pings.yaml)
list(APPEND METRICS_LIST ${CMAKE_CURRENT_BINARY_DIR}/generated/iosmetrics.yaml)

# We execute this as a command and not a process,
# because different from the Glean internal stuff
# the VPN metrics and pings files can change constantly
# and we want to re-run the command for each build
add_custom_command(
    OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/generated/VPNMetrics.swift
    DEPENDS ${PINGS_LIST} ${METRICS_LIST}
    COMMAND ${PYTHON_EXECUTABLE} -m glean_parser translate -f swift
        -o ${CMAKE_CURRENT_BINARY_DIR}/generated -s "glean_namespace=IOSGlean"
        ${PINGS_LIST} ${METRICS_LIST}
    # We need to rename otherwise XCode gets confused with the same name file name as the Glean internal metrics
    COMMAND mv ${CMAKE_CURRENT_BINARY_DIR}/generated/Metrics.swift ${CMAKE_CURRENT_BINARY_DIR}/generated/VPNMetrics.swift
)
set_source_files_properties(
    ${CMAKE_CURRENT_BINARY_DIR}/generated/VPNMetrics.swift
    PROPERTIES GENERATED TRUE
)

add_custom_target(iosglean_telemetry DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/generated/VPNMetrics.swift)
add_dependencies(iosglean iosglean_telemetry)

target_link_libraries(iosglean PRIVATE qtglean_bindings)