// Standalone tests for reasampler::render_settings — no REAPER, no framework.
// Covers the three pure pieces behind the M7 capture family: the source-mode ->
// RENDER_SETTINGS bit mapping (wet-only), P_RAZOREDITS parsing -> ranges + union,
// and the capture-action taxonomy table (stable ids, coverage of every mode).

#include "../src/render_settings.h"

#include <cstdio>
#include <set>
#include <string>

using namespace reasampler;

static int g_fail = 0;
#define CHECK(cond) do { if(!(cond)) { \
    std::printf("FAIL line %d: %s\n", __LINE__, #cond); ++g_fail; } } while(0)

// --- renderSettingsFor: wet-only bit mapping ---------------------------------

static void testMasterMixWet() {
    // Master mix -> value 0 (no source bits), supported.
    RenderSettingsChoice c = renderSettingsFor(SourceMode::MasterMix, 1.0);
    CHECK(c.settings == kRenderMasterMix);
    CHECK(c.supported);
    // TimeSelection aliases master mix — same result.
    CHECK(renderSettingsFor(SourceMode::TimeSelection, 1.0).settings == kRenderMasterMix);
    // wetDry argument is irrelevant for M7 (all actions are wet); passing 0.0
    // must still yield the same wet master-mix bits.
    CHECK(renderSettingsFor(SourceMode::MasterMix, 0.0).settings == kRenderMasterMix);
}

static void testSelectedTracksWet() {
    // Selected tracks -> via master (&128), header-confirmed.
    RenderSettingsChoice c = renderSettingsFor(SourceMode::SelectedTracks, 1.0);
    CHECK(c.settings == kRenderSelTracksViaMaster);
    CHECK(c.supported);
}

static void testSelectedItemsSingleFile() {
    // Items render to ONE file (single-file bit set) so N items -> 1 bank entry.
    RenderSettingsChoice c = renderSettingsFor(SourceMode::SelectedItems, 1.0);
    CHECK((c.settings & kRenderSelItems) != 0);
    CHECK((c.settings & kRenderSingleFile) != 0);
    CHECK(c.supported);
}

static void testRazorSingleFile() {
    // Razor edits render to ONE file (same single-file rationale as items).
    RenderSettingsChoice c = renderSettingsFor(SourceMode::RazorArea, 1.0);
    CHECK((c.settings & kRenderRazorEdits) != 0);
    CHECK((c.settings & kRenderSingleFile) != 0);
    CHECK(c.supported);
}

static void testRealtimeIsUnsupportedOffline() {
    // The realtime mode is not an offline-render source — must report unsupported
    // so the offline backend refuses it rather than rendering the master mix.
    CHECK(!renderSettingsFor(SourceMode::Realtime, 1.0).supported);
}

// --- parseRazorEdits: P_RAZOREDITS string -> ranges --------------------------

static void testParseSingleTrackAudioArea() {
    // One track-audio triple: start end "" (empty quoted GUID = track audio).
    auto r = parseRazorEdits("1.5 3.25 \"\"");
    CHECK(r.size() == 1);
    CHECK(r[0].startSeconds == 1.5);
    CHECK(r[0].endSeconds == 3.25);
}

static void testParseMultipleAreas() {
    auto r = parseRazorEdits("0.0 1.0 \"\" 2.0 4.0 \"\"");
    CHECK(r.size() == 2);
    CHECK(r[0].startSeconds == 0.0 && r[0].endSeconds == 1.0);
    CHECK(r[1].startSeconds == 2.0 && r[1].endSeconds == 4.0);
}

static void testParseSkipsEnvelopeLaneAreas() {
    // A triple whose GUID is a real {…} is an ENVELOPE-lane area — skipped, since
    // M7 renders track audio. Only the track-audio triple survives.
    auto r = parseRazorEdits(
        "1.0 2.0 \"\" 3.0 4.0 {AAAAAAAA-BBBB-CCCC-DDDD-EEEEEEEEEEEE}");
    CHECK(r.size() == 1);
    CHECK(r[0].startSeconds == 1.0 && r[0].endSeconds == 2.0);
}

static void testParseEmptyAndMalformed() {
    CHECK(parseRazorEdits("").empty());
    // Empty/inverted range dropped (end <= start).
    CHECK(parseRazorEdits("5.0 5.0 \"\"").empty());
    CHECK(parseRazorEdits("5.0 1.0 \"\"").empty());
    // Trailing garbage token in a time field -> that triple dropped, not a crash.
    CHECK(parseRazorEdits("1.0x 2.0 \"\"").empty());
    // A dangling partial triple (missing GUID token) is ignored.
    CHECK(parseRazorEdits("1.0 2.0").empty());
}

static void testRazorUnionBounds() {
    // Union = min start .. max end across all areas (the exact render window).
    std::vector<RazorRange> ranges = {{2.0, 3.0}, {0.5, 1.0}, {4.0, 6.5}};
    RazorRange u = razorUnionBounds(ranges);
    CHECK(u.startSeconds == 0.5);
    CHECK(u.endSeconds == 6.5);
    // Empty -> {0,0} sentinel (caller treats as "no razor area").
    RazorRange empty = razorUnionBounds({});
    CHECK(empty.startSeconds == 0.0 && empty.endSeconds == 0.0);
}

// --- captureActionTable: the taxonomy ----------------------------------------

static void testTableHasFourWetOnlyRows() {
    const auto& table = captureActionTable();
    // Exactly 4 wet-only rows: MASTER, TRACKS_WET, ITEMS_WET, RAZOR_WET.
    CHECK(table.size() == 4);

    std::set<std::string> ids;
    bool sawMaster = false, sawTracks = false, sawItems = false, sawRazor = false;
    for (const auto& def : table) {
        // Every id is a non-empty CEREBELLUM_REASAMPLER_ string and is UNIQUE
        // (duplicate ids would collide on registration).
        std::string id = def.commandString;
        CHECK(id.rfind("CEREBELLUM_REASAMPLER_", 0) == 0);
        CHECK(ids.insert(id).second);  // false if duplicate
        // Every row is wet (>=0.5) and a real offline source.
        CHECK(def.wetDry >= 0.5);
        CHECK(renderSettingsFor(def.sourceMode, def.wetDry).supported);

        if (def.sourceMode == SourceMode::MasterMix)     sawMaster = true;
        if (def.sourceMode == SourceMode::SelectedTracks) sawTracks = true;
        if (def.sourceMode == SourceMode::SelectedItems)  sawItems  = true;
        if (def.sourceMode == SourceMode::RazorArea)      sawRazor  = true;
    }
    CHECK(sawMaster);
    CHECK(sawTracks);
    CHECK(sawItems);
    CHECK(sawRazor);
}

static void testNoDryRowsInTable() {
    // M7 ships wet-only. No table row must have wetDry < 0.5.
    for (const auto& def : captureActionTable())
        CHECK(def.wetDry >= 0.5);
}

int main() {
    testMasterMixWet();
    testSelectedTracksWet();
    testSelectedItemsSingleFile();
    testRazorSingleFile();
    testRealtimeIsUnsupportedOffline();
    testParseSingleTrackAudioArea();
    testParseMultipleAreas();
    testParseSkipsEnvelopeLaneAreas();
    testParseEmptyAndMalformed();
    testRazorUnionBounds();
    testTableHasFourWetOnlyRows();
    testNoDryRowsInTable();

    if (g_fail == 0) std::printf("render_settings: all tests passed\n");
    else             std::printf("render_settings: %d CHECK(s) FAILED\n", g_fail);
    return g_fail == 0 ? 0 : 1;
}