// render_settings.cpp — pure logic for the M7 capture action family. See header.
// NO REAPER types; unit-tested by tests/test_render_settings.cpp.

#include "render_settings.h"

#include <sstream>

namespace reasampler {

RenderSettingsChoice renderSettingsFor(SourceMode mode, double /*wetDry*/) {
    // All M7 actions are wet-only. `wetDry` is accepted so CaptureRequest.wetDry
    // remains the seam for future M10 dry work, but it does not affect the mapping.
    RenderSettingsChoice c;

    switch (mode) {
        case SourceMode::MasterMix:
        case SourceMode::TimeSelection:
            // Master IS the mix — wet-only; &(1|2)==0, no source bits.
            c.settings  = kRenderMasterMix;
            c.supported = true;
            return c;

        case SourceMode::SelectedTracks:
            // Selected tracks via master (&128) — wet (post-FX). Header ~3041.
            c.settings  = kRenderSelTracksViaMaster;
            c.supported = true;
            return c;

        case SourceMode::SelectedItems:
            // Selected media items, rendered to ONE file (single-file bit) so a
            // multi-item selection yields a single bank entry, not N wavs.
            c.settings  = kRenderSelItems | kRenderSingleFile;
            c.supported = true;
            return c;

        case SourceMode::RazorArea:
            // Render razor edits to ONE file (same single-file rationale as items).
            c.settings  = kRenderRazorEdits | kRenderSingleFile;
            c.supported = true;
            return c;

        case SourceMode::Realtime:
            // Not an offline-render source — the realtime backend (M8) owns it.
            c.settings  = kRenderMasterMix;
            c.supported = false;
            return c;
    }
    // Unreachable for a valid enum; fail closed (unsupported) rather than render.
    c.supported = false;
    return c;
}

std::vector<RazorRange> parseRazorEdits(const std::string& razorString) {
    std::vector<RazorRange> ranges;
    std::istringstream in(razorString);

    // The string is space-separated TRIPLES: <start> <end> <envGuidString>.
    // A track-audio area's third token is the literal two-char string `""`; an
    // envelope-lane area's is a GUID `{…}`. We keep only track-audio triples.
    std::string startTok, endTok, guidTok;
    while (in >> startTok >> endTok >> guidTok) {
        // Envelope-lane areas carry a real GUID; skip them (M7 = track audio).
        // A track-audio area's GUID token is the empty quoted string `""`.
        if (guidTok != "\"\"") continue;

        // Parse the two time tokens. std::stod throws on garbage — guard so one
        // malformed triple does not abort the whole parse.
        double start = 0.0, end = 0.0;
        try {
            std::size_t sp = 0, ep = 0;
            start = std::stod(startTok, &sp);
            end   = std::stod(endTok, &ep);
            // Reject tokens with trailing garbage (e.g. "1.0x") — a partial parse
            // is a malformed area, not a valid range.
            if (sp != startTok.size() || ep != endTok.size()) continue;
        } catch (...) {
            continue;
        }

        if (end > start) ranges.push_back({start, end});  // drop empty/inverted
    }
    return ranges;
}

RazorRange razorUnionBounds(const std::vector<RazorRange>& ranges) {
    if (ranges.empty()) return {0.0, 0.0};
    RazorRange u = ranges.front();
    for (const RazorRange& r : ranges) {
        if (r.startSeconds < u.startSeconds) u.startSeconds = r.startSeconds;
        if (r.endSeconds   > u.endSeconds)   u.endSeconds   = r.endSeconds;
    }
    return u;
}

const std::vector<CaptureActionDef>& captureActionTable() {
    // Built once (function-local static): four wet-only actions. Tail OFF for all
    // (exact bounds). Ids are FOREVER-STABLE — never edit a shipped string.
    // Dry variants deferred to M10; see kRenderPreFaderStems note in the header.
    static const std::vector<CaptureActionDef> table = {
        // Master mix — wet only (master IS the mix; no pre-FX concept applies).
        {"CEREBELLUM_REASAMPLER_CAPTURE_MASTER",
         "ReaSampler: capture master mix", "master_mix",
         SourceMode::MasterMix, 1.0},

        // Selected tracks — wet (via master, &128).
        {"CEREBELLUM_REASAMPLER_CAPTURE_TRACKS_WET",
         "ReaSampler: capture selected tracks", "tracks_wet",
         SourceMode::SelectedTracks, 1.0},

        // Selected items — wet, single file (&32 | single-file).
        {"CEREBELLUM_REASAMPLER_CAPTURE_ITEMS_WET",
         "ReaSampler: capture selected items", "items_wet",
         SourceMode::SelectedItems, 1.0},

        // Razor area — wet, single file (&4096 | single-file).
        {"CEREBELLUM_REASAMPLER_CAPTURE_RAZOR_WET",
         "ReaSampler: capture razor area", "razor_wet",
         SourceMode::RazorArea, 1.0},
    };
    return table;
}

} // namespace reasampler