#include <catch2/catch_test_macros.hpp>

import cargoxx.manifest;
import cargoxx.util;
import std;

using cargoxx::manifest::Edition;
using cargoxx::manifest::parse;
using cargoxx::util::ErrorCode;

namespace {

auto write_manifest(std::string_view body) -> std::filesystem::path {
    auto dir = std::filesystem::temp_directory_path() /
               std::format("cargoxx-manifest-test-{}", std::random_device{}());
    std::filesystem::create_directories(dir);
    auto path = dir / "Cargoxx.toml";
    std::ofstream{path} << body;
    return path;
}

} // namespace

TEST_CASE("parse rejects missing file", "[manifest][parse]") {
    auto r = parse("/nonexistent/Cargoxx.toml");
    REQUIRE_FALSE(r.has_value());
    REQUIRE(r.error().code == ErrorCode::ManifestNotFound);
}

TEST_CASE("parse rejects malformed toml", "[manifest][parse]") {
    auto p = write_manifest("[package\nname = ");
    auto r = parse(p);
    REQUIRE_FALSE(r.has_value());
    REQUIRE(r.error().code == ErrorCode::ManifestParseError);
}

TEST_CASE("parse accepts a minimal manifest", "[manifest][parse]") {
    auto p = write_manifest(R"(
[package]
name = "foo"
version = "0.1.0"
)");
    auto r = parse(p);
    REQUIRE(r.has_value());
    REQUIRE(r->package.name == "foo");
    REQUIRE(r->package.version == "0.1.0");
    REQUIRE(r->package.edition == Edition::Cpp23);
    REQUIRE(r->dependencies.empty());
    REQUIRE_FALSE(r->build.warnings_as_errors);
}

TEST_CASE("parse handles all edition values", "[manifest][parse]") {
    for (auto [s, e] : std::vector<std::pair<std::string, Edition>>{
             {"cpp20", Edition::Cpp20}, {"cpp23", Edition::Cpp23}, {"cpp26", Edition::Cpp26}}) {
        auto p = write_manifest(std::format(R"(
[package]
name = "foo"
version = "0.1.0"
edition = "{}"
)",
                                            s));
        auto r = parse(p);
        REQUIRE(r.has_value());
        REQUIRE(r->package.edition == e);
    }
}

TEST_CASE("parse rejects unknown edition", "[manifest][parse]") {
    auto p = write_manifest(R"(
[package]
name = "foo"
version = "0.1.0"
edition = "cpp99"
)");
    auto r = parse(p);
    REQUIRE_FALSE(r.has_value());
    REQUIRE(r.error().code == ErrorCode::ManifestInvalidField);
}

TEST_CASE("parse extracts authors and license", "[manifest][parse]") {
    auto p = write_manifest(R"(
[package]
name = "foo"
version = "0.1.0"
authors = ["Ada", "Grace"]
license = "MIT"
)");
    auto r = parse(p);
    REQUIRE(r.has_value());
    REQUIRE(r->package.authors == std::vector<std::string>{"Ada", "Grace"});
    REQUIRE(r->package.license == "MIT");
}

TEST_CASE("parse accepts string-form dependency", "[manifest][parse]") {
    auto p = write_manifest(R"(
[package]
name = "foo"
version = "0.1.0"

[dependencies]
fmt = "10.2"
)");
    auto r = parse(p);
    REQUIRE(r.has_value());
    REQUIRE(r->dependencies.size() == 1);
    REQUIRE(r->dependencies[0].name == "fmt");
    REQUIRE(r->dependencies[0].version_spec == "10.2");
    REQUIRE(r->dependencies[0].components.empty());
}

TEST_CASE("parse accepts table-form dependency with components", "[manifest][parse]") {
    auto p = write_manifest(R"(
[package]
name = "foo"
version = "0.1.0"

[dependencies]
boost = { version = "1.84", components = ["filesystem", "system"] }
)");
    auto r = parse(p);
    REQUIRE(r.has_value());
    REQUIRE(r->dependencies.size() == 1);
    REQUIRE(r->dependencies[0].name == "boost");
    REQUIRE(r->dependencies[0].version_spec == "1.84");
    REQUIRE(r->dependencies[0].components == std::vector<std::string>{"filesystem", "system"});
}

TEST_CASE("parse rejects dependency value of wrong type", "[manifest][parse]") {
    auto p = write_manifest(R"(
[package]
name = "foo"
version = "0.1.0"

[dependencies]
weird = 42
)");
    auto r = parse(p);
    REQUIRE_FALSE(r.has_value());
    REQUIRE(r.error().code == ErrorCode::ManifestInvalidField);
}

TEST_CASE("parse extracts build settings", "[manifest][parse]") {
    auto p = write_manifest(R"(
[package]
name = "foo"
version = "0.1.0"

[build]
warnings_as_errors = true
sanitizers = ["address", "undefined"]
)");
    auto r = parse(p);
    REQUIRE(r.has_value());
    REQUIRE(r->build.warnings_as_errors);
    REQUIRE(r->build.sanitizers == std::vector<std::string>{"address", "undefined"});
}

TEST_CASE("parse rejects unknown [package] key", "[manifest][parse]") {
    auto p = write_manifest(R"(
[package]
name = "foo"
version = "0.1.0"
flavor = "spicy"
)");
    auto r = parse(p);
    REQUIRE_FALSE(r.has_value());
    REQUIRE(r.error().code == ErrorCode::ManifestUnknownField);
}

TEST_CASE("parse rejects unknown [build] key", "[manifest][parse]") {
    auto p = write_manifest(R"(
[package]
name = "foo"
version = "0.1.0"

[build]
optimize = "max"
)");
    auto r = parse(p);
    REQUIRE_FALSE(r.has_value());
    REQUIRE(r.error().code == ErrorCode::ManifestUnknownField);
}

TEST_CASE("parse accepts reserved [package] fields", "[manifest][parse]") {
    auto p = write_manifest(R"(
[package]
name = "foo"
version = "0.1.0"
description = "demo"
repository = "https://example.com/foo"
)");
    auto r = parse(p);
    REQUIRE(r.has_value());
}

TEST_CASE("parse accepts reserved top-level tables", "[manifest][parse]") {
    auto p = write_manifest(R"(
[package]
name = "foo"
version = "0.1.0"

[features]
default = []

[workspace]
members = ["a"]
)");
    auto r = parse(p);
    REQUIRE(r.has_value());
}

TEST_CASE("parse extracts dev-dependencies", "[manifest][parse]") {
    auto p = write_manifest(R"(
[package]
name = "foo"
version = "0.1.0"

[dev-dependencies]
catch2 = "3.5.0"
gtest = { version = "1.14", components = ["gmock"] }
)");
    auto r = parse(p);
    REQUIRE(r.has_value());
    REQUIRE(r->dev_dependencies.size() == 2);
    auto find = [&](std::string_view n) {
        return std::ranges::find_if(r->dev_dependencies,
                                     [&](const auto& d) { return d.name == n; });
    };
    auto catch2 = find("catch2");
    REQUIRE(catch2 != r->dev_dependencies.end());
    REQUIRE(catch2->version_spec == "3.5.0");
    REQUIRE(catch2->components.empty());
    auto gtest = find("gtest");
    REQUIRE(gtest != r->dev_dependencies.end());
    REQUIRE(gtest->version_spec == "1.14");
    REQUIRE(gtest->components == std::vector<std::string>{"gmock"});
}

TEST_CASE("parse extracts [build].include_dirs", "[manifest][parse]") {
    auto p = write_manifest(R"(
[package]
name = "foo"
version = "0.1.0"

[build]
include_dirs = ["third_party", "vendor/spdlog"]
)");
    auto r = parse(p);
    REQUIRE(r.has_value());
    REQUIRE(r->build.include_dirs ==
            std::vector<std::string>{"third_party", "vendor/spdlog"});
}

TEST_CASE("parse rejects [build].include_dirs that escape the project",
          "[manifest][parse]") {
    auto p = write_manifest(R"(
[package]
name = "foo"
version = "0.1.0"

[build]
include_dirs = ["../escape"]
)");
    auto r = parse(p);
    REQUIRE_FALSE(r.has_value());
    REQUIRE(r.error().code == cargoxx::util::ErrorCode::ManifestInvalidField);
}

TEST_CASE("parse rejects invalid name with spaces", "[manifest][parse]") {
    auto p = write_manifest(R"(
[package]
name = "foo bar"
version = "0.1.0"
)");
    auto r = parse(p);
    REQUIRE_FALSE(r.has_value());
    REQUIRE(r.error().code == ErrorCode::LayoutInvalidName);
}

TEST_CASE("parse rejects name starting with digit", "[manifest][parse]") {
    auto p = write_manifest(R"(
[package]
name = "1foo"
version = "0.1.0"
)");
    auto r = parse(p);
    REQUIRE_FALSE(r.has_value());
    REQUIRE(r.error().code == ErrorCode::LayoutInvalidName);
}

TEST_CASE("parse rejects missing [package].name", "[manifest][parse]") {
    auto p = write_manifest(R"(
[package]
version = "0.1.0"
)");
    auto r = parse(p);
    REQUIRE_FALSE(r.has_value());
    REQUIRE(r.error().code == ErrorCode::ManifestInvalidField);
}

TEST_CASE("parse recognizes { path = \"...\" } as a cargoxx path dep",
           "[manifest][parse]") {
    auto p = write_manifest(R"(
[package]
name = "consumer"
version = "0.1.0"
edition = "cpp23"

[dependencies]
mylib = { path = "../mylib" }
)");
    auto r = parse(p);
    REQUIRE(r.has_value());
    REQUIRE(r->dependencies.size() == 1);
    const auto& dep = r->dependencies[0];
    REQUIRE(dep.name == "mylib");
    REQUIRE(dep.source == cargoxx::manifest::DepSource::CargoxxPath);
    REQUIRE(dep.path.has_value());
    REQUIRE(*dep.path == "../mylib");
    // Version defaults to "*" when only `path` is given.
    REQUIRE(dep.version_spec == "*");
}

TEST_CASE("parse rejects dep table without version or path",
           "[manifest][parse]") {
    auto p = write_manifest(R"(
[package]
name = "consumer"
version = "0.1.0"
edition = "cpp23"

[dependencies]
mylib = { components = ["a"] }
)");
    auto r = parse(p);
    REQUIRE_FALSE(r.has_value());
    REQUIRE(r.error().code == ErrorCode::ManifestInvalidField);
}