-module(dream_test@runner).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/dream_test/runner.gleam").
-export([default_config/0, sequential_config/0, run_all_with_config/2, run_all/1, run_suite_with_config/2, run_suite/1, run_single_test/1, run_test_case/1, run_all_sequential/1]).
-export_type([runner_config/0]).

-if(?OTP_RELEASE >= 27).
-define(MODULEDOC(Str), -moduledoc(Str)).
-define(DOC(Str), -doc(Str)).
-else.
-define(MODULEDOC(Str), -compile([])).
-define(DOC(Str), -compile([])).
-endif.

?MODULEDOC(
    " Test runner for dream_test.\n"
    "\n"
    " This module executes test cases and produces results. Tests run in isolated\n"
    " BEAM processes by default, providing:\n"
    "\n"
    " - **Crash isolation** - A panicking test doesn't crash the runner\n"
    " - **Timeout protection** - Hanging tests are killed after a timeout\n"
    " - **Parallel execution** - Tests run concurrently for speed\n"
    "\n"
    " ## Basic Usage\n"
    "\n"
    " ```gleam\n"
    " import dream_test/unit.{describe, it, to_test_cases}\n"
    " import dream_test/runner.{run_all}\n"
    " import dream_test/reporter/bdd.{report}\n"
    " import gleam/io\n"
    "\n"
    " pub fn main() {\n"
    "   tests()\n"
    "   |> to_test_cases(\"my_test\")\n"
    "   |> run_all()\n"
    "   |> report(io.print)\n"
    " }\n"
    " ```\n"
    "\n"
    " ## Execution Modes\n"
    "\n"
    " | Function               | Isolation | Parallel | Timeout | Use Case                    |\n"
    " |------------------------|-----------|----------|---------|------------------------------|\n"
    " | `run_all`              | ✓         | ✓ (4)    | 5s      | Default for most tests       |\n"
    " | `run_all_with_config`  | ✓         | Custom   | Custom  | Custom concurrency/timeout   |\n"
    " | `run_all_sequential`   | ✗         | ✗        | ✗       | Debugging, simple tests      |\n"
    "\n"
    " ## Custom Configuration\n"
    "\n"
    " ```gleam\n"
    " import dream_test/runner.{run_all_with_config, RunnerConfig}\n"
    "\n"
    " // High concurrency for fast tests\n"
    " let fast_config = RunnerConfig(\n"
    "   max_concurrency: 16,\n"
    "   default_timeout_ms: 1000,\n"
    " )\n"
    "\n"
    " // Sequential with long timeout for integration tests  \n"
    " let integration_config = RunnerConfig(\n"
    "   max_concurrency: 1,\n"
    "   default_timeout_ms: 30_000,\n"
    " )\n"
    "\n"
    " test_cases\n"
    " |> run_all_with_config(fast_config)\n"
    " |> report(io.print)\n"
    " ```\n"
    "   tests()\n"
    "   |> to_test_cases(\"my_test\")\n"
    "   |> run_all()\n"
    "   |> report(io.print)\n"
    " }\n"
).

-type runner_config() :: {runner_config, integer(), integer()}.

-file("src/dream_test/runner.gleam", 120).
?DOC(
    " Default runner configuration.\n"
    "\n"
    " Returns a configuration with:\n"
    " - 4 concurrent tests\n"
    " - 5 second timeout per test\n"
    "\n"
    " This is suitable for most unit test suites.\n"
    "\n"
    " ## Example\n"
    "\n"
    " ```gleam\n"
    " let config = default_config()\n"
    " // RunnerConfig(max_concurrency: 4, default_timeout_ms: 5000)\n"
    " ```\n"
).
-spec default_config() -> runner_config().
default_config() ->
    {runner_config, 4, 5000}.

-file("src/dream_test/runner.gleam", 140).
?DOC(
    " Configuration for sequential execution.\n"
    "\n"
    " Returns a configuration with:\n"
    " - 1 concurrent test (sequential)\n"
    " - 5 second timeout per test\n"
    "\n"
    " Use this when debugging test failures or when tests must not run in parallel.\n"
    "\n"
    " ## Example\n"
    "\n"
    " ```gleam\n"
    " test_cases\n"
    " |> run_all_with_config(sequential_config())\n"
    " |> report(io.print)\n"
    " ```\n"
).
-spec sequential_config() -> runner_config().
sequential_config() ->
    {runner_config, 1, 5000}.

-file("src/dream_test/runner.gleam", 173).
?DOC(
    " Run all tests with custom configuration.\n"
    "\n"
    " Each test runs in an isolated BEAM process. If a test panics, it doesn't\n"
    " affect other tests. If a test exceeds the timeout, it's killed and marked\n"
    " as `TimedOut`.\n"
    "\n"
    " Results are returned in the same order as the input tests, regardless of\n"
    " which tests finish first.\n"
    "\n"
    " ## Example\n"
    "\n"
    " ```gleam\n"
    " let config = RunnerConfig(max_concurrency: 8, default_timeout_ms: 10_000)\n"
    "\n"
    " tests()\n"
    " |> to_test_cases(\"my_test\")\n"
    " |> run_all_with_config(config)\n"
    " |> report(io.print)\n"
    " ```\n"
    "\n"
    " ## Parameters\n"
    "\n"
    " - `config` - Execution settings (concurrency, timeout)\n"
    " - `test_cases` - List of test cases to run\n"
    "\n"
    " ## Returns\n"
    "\n"
    " List of `TestResult` in the same order as the input tests.\n"
).
-spec run_all_with_config(runner_config(), list(dream_test@types:test_case())) -> list(dream_test@types:test_result()).
run_all_with_config(Config, Test_cases) ->
    Parallel_config = {parallel_config,
        erlang:element(2, Config),
        erlang:element(3, Config)},
    dream_test@parallel:run_parallel(Parallel_config, Test_cases).

-file("src/dream_test/runner.gleam", 198).
?DOC(
    " Run all tests with default configuration.\n"
    "\n"
    " This is the recommended way to run tests. Uses `default_config()`:\n"
    " - 4 concurrent tests\n"
    " - 5 second timeout per test\n"
    " - Full process isolation\n"
    "\n"
    " ## Example\n"
    "\n"
    " ```gleam\n"
    " pub fn main() {\n"
    " ```\n"
).
-spec run_all(list(dream_test@types:test_case())) -> list(dream_test@types:test_result()).
run_all(Test_cases) ->
    run_all_with_config(default_config(), Test_cases).

-file("src/dream_test/runner.gleam", 284).
?DOC(
    " Run a test suite with custom configuration.\n"
    "\n"
    " Use this when you need `before_all`/`after_all` hooks with custom\n"
    " concurrency or timeout settings. For default settings, use `run_suite`.\n"
    "\n"
    " ## Execution Flow\n"
    "\n"
    " For each group in the suite:\n"
    "\n"
    " ```text\n"
    " ┌─────────────────────────────────────────────────────────────┐\n"
    " │ 1. Run before_all hooks (sequentially)                      │\n"
    " │    └─ If any fail → mark all tests as SetupFailed, skip to 5│\n"
    " │                                                              │\n"
    " │ 2. For each test:                                           │\n"
    " │    ├─ Run before_each hooks (outer → inner)                 │\n"
    " │    ├─ Run test body                                         │\n"
    " │    └─ Run after_each hooks (inner → outer)                  │\n"
    " │                                                              │\n"
    " │ 3. Tests run in parallel (up to max_concurrency)            │\n"
    " │                                                              │\n"
    " │ 4. Process nested groups (recurse)                          │\n"
    " │                                                              │\n"
    " │ 5. Run after_all hooks (always, even on failure)            │\n"
    " └─────────────────────────────────────────────────────────────┘\n"
    " ```\n"
    "\n"
    " ## Parallelism\n"
    "\n"
    " - Tests within a group run in parallel\n"
    " - `before_all` and `after_all` are synchronization barriers\n"
    " - Nested groups are processed after their parent's tests complete\n"
    "\n"
    " ## Example\n"
    "\n"
    " ```gleam\n"
    " import dream_test/unit.{describe, it, before_all, after_all, to_test_suite}\n"
    " import dream_test/runner.{run_suite_with_config, RunnerConfig}\n"
    " import dream_test/reporter/bdd.{report}\n"
    " import dream_test/types.{AssertionOk}\n"
    " import gleam/io\n"
    "\n"
    " pub fn main() {\n"
    "   // Custom config for integration tests\n"
    "   let config = RunnerConfig(\n"
    "     max_concurrency: 2,          // Limit parallelism for shared resources\n"
    "     default_timeout_ms: 30_000,  // 30s timeout for slow operations\n"
    "   )\n"
    "\n"
    "   integration_tests()\n"
    "   |> to_test_suite(\"integration_test\")\n"
    "   |> run_suite_with_config(config)\n"
    "   |> report(io.print)\n"
    " }\n"
    "\n"
    " fn integration_tests() {\n"
    "   describe(\"Database\", [\n"
    "     before_all(fn() { start_database(); AssertionOk }),\n"
    "     before_each(fn() { begin_transaction(); AssertionOk }),\n"
    "\n"
    "     it(\"creates users\", fn() { ... }),\n"
    "     it(\"queries users\", fn() { ... }),\n"
    "\n"
    "     after_each(fn() { rollback_transaction(); AssertionOk }),\n"
    "     after_all(fn() { stop_database(); AssertionOk }),\n"
    "   ])\n"
    " }\n"
    " ```\n"
    "\n"
    " ## Parameters\n"
    "\n"
    " - `config` - Execution settings (concurrency, timeout)\n"
    " - `suite` - The test suite from `to_test_suite`\n"
    "\n"
    " ## Returns\n"
    "\n"
    " List of `TestResult` for all tests in the suite.\n"
).
-spec run_suite_with_config(runner_config(), dream_test@types:test_suite()) -> list(dream_test@types:test_result()).
run_suite_with_config(Config, Suite) ->
    Parallel_config = {parallel_config,
        erlang:element(2, Config),
        erlang:element(3, Config)},
    dream_test@parallel:run_suite_parallel(Parallel_config, Suite).

-file("src/dream_test/runner.gleam", 367).
?DOC(
    " Run a test suite with default configuration.\n"
    "\n"
    " This is the recommended way to run tests when you need `before_all`\n"
    " or `after_all` hooks. It uses sensible defaults suitable for most\n"
    " integration test suites.\n"
    "\n"
    " ## Default Configuration\n"
    "\n"
    " | Setting            | Value   | Meaning                              |\n"
    " |--------------------|---------|--------------------------------------|\n"
    " | `max_concurrency`  | 4       | Up to 4 tests run in parallel        |\n"
    " | `default_timeout`  | 5000ms  | Each test has 5 seconds to complete  |\n"
    "\n"
    " For custom settings, use `run_suite_with_config`.\n"
    "\n"
    " ## When to Use `run_suite` vs `run_all`\n"
    "\n"
    " ```gleam\n"
    " // Use run_all when you DON'T need before_all/after_all\n"
    " tests()\n"
    " |> to_test_cases(\"my_test\")\n"
    " |> run_all()\n"
    "\n"
    " // Use run_suite when you DO need before_all/after_all\n"
    " tests()\n"
    " |> to_test_suite(\"my_test\")\n"
    " |> run_suite()\n"
    " ```\n"
    "\n"
    " ## Example\n"
    "\n"
    " ```gleam\n"
    " import dream_test/unit.{describe, it, before_all, after_all, to_test_suite}\n"
    " import dream_test/runner.{run_suite}\n"
    " import dream_test/reporter/bdd.{report}\n"
    " import dream_test/types.{AssertionOk}\n"
    " import gleam/io\n"
    "\n"
    " pub fn main() {\n"
    "   tests()\n"
    "   |> to_test_suite(\"my_integration_test\")\n"
    "   |> run_suite()\n"
    "   |> report(io.print)\n"
    " }\n"
    "\n"
    " fn tests() {\n"
    "   describe(\"API client\", [\n"
    "     before_all(fn() {\n"
    "       start_mock_server()\n"
    "       AssertionOk\n"
    "     }),\n"
    "\n"
    "     it(\"fetches data\", fn() { ... }),\n"
    "     it(\"handles errors\", fn() { ... }),\n"
    "\n"
    "     after_all(fn() {\n"
    "       stop_mock_server()\n"
    "       AssertionOk\n"
    "     }),\n"
    "   ])\n"
    " }\n"
    " ```\n"
    "\n"
    " ## Parameters\n"
    "\n"
    " - `suite` - The test suite from `to_test_suite`\n"
    "\n"
    " ## Returns\n"
    "\n"
    " List of `TestResult` for all tests in the suite.\n"
).
-spec run_suite(dream_test@types:test_suite()) -> list(dream_test@types:test_result()).
run_suite(Suite) ->
    run_suite_with_config(default_config(), Suite).

-file("src/dream_test/runner.gleam", 414).
?DOC(
    " Run a single test directly without isolation.\n"
    "\n"
    " Executes the test function and returns a `TestResult`. No process isolation\n"
    " or timeout protection. Useful for debugging individual tests.\n"
    "\n"
    " ## Example\n"
    "\n"
    " ```gleam\n"
    " let config = SingleTestConfig(\n"
    "   name: \"my test\",\n"
    "   full_name: [\"suite\", \"my test\"],\n"
    "   tags: [],\n"
    "   kind: Unit,\n"
    "   run: fn() { ... },\n"
    "   timeout_ms: None,\n"
    " )\n"
    "\n"
    " let result = run_single_test(config)\n"
    " ```\n"
).
-spec run_single_test(dream_test@types:single_test_config()) -> dream_test@types:test_result().
run_single_test(Config) ->
    Assertion_result = (erlang:element(6, Config))(),
    Failures = case Assertion_result of
        assertion_ok ->
            [];

        {assertion_failed, Failure} ->
            [Failure]
    end,
    Status = dream_test@types:status_from_failures(Failures),
    {test_result,
        erlang:element(2, Config),
        erlang:element(3, Config),
        Status,
        0,
        erlang:element(4, Config),
        Failures,
        erlang:element(5, Config)}.

-file("src/dream_test/runner.gleam", 439).
?DOC(
    " Run a single test case directly without isolation.\n"
    "\n"
    " Convenience wrapper around `run_single_test` that unwraps the `TestCase`.\n"
).
-spec run_test_case(dream_test@types:test_case()) -> dream_test@types:test_result().
run_test_case(Test_case) ->
    case Test_case of
        {test_case, Config} ->
            run_single_test(Config)
    end.

-file("src/dream_test/runner.gleam", 445).
-spec run_all_from_list(
    list(dream_test@types:test_case()),
    list(dream_test@types:test_result())
) -> list(dream_test@types:test_result()).
run_all_from_list(Remaining, Accumulated) ->
    case Remaining of
        [] ->
            lists:reverse(Accumulated);

        [Head | Tail] ->
            Result = run_test_case(Head),
            run_all_from_list(Tail, [Result | Accumulated])
    end.

-file("src/dream_test/runner.gleam", 390).
?DOC(
    " Run all tests sequentially without process isolation.\n"
    "\n"
    " Tests run one at a time in the main process. No timeout protection.\n"
    " Use this for:\n"
    " - Debugging test failures\n"
    " - When process isolation causes issues\n"
    " - Very simple test suites\n"
    "\n"
    " **Warning:** A crashing test will crash the entire test run.\n"
    "\n"
    " ## Example\n"
    "\n"
    " ```gleam\n"
    " // For debugging a specific failure\n"
    " test_cases\n"
    " |> run_all_sequential()\n"
    " |> report(io.print)\n"
    " ```\n"
).
-spec run_all_sequential(list(dream_test@types:test_case())) -> list(dream_test@types:test_result()).
run_all_sequential(Test_cases) ->
    run_all_from_list(Test_cases, []).