package com.medithings.vesiscan.managers

import com.google.gson.Gson
import com.google.gson.JsonParser
import com.medithings.vesiscan.walldetect.MethodDRunner
import com.medithings.vesiscan.walldetect.MethodDDetector
import com.medithings.vesiscan.walldetect.algo.methodd.MethodDParams
import com.medithings.vesiscan.walldetect.algo.methodd.MethodDPreprocessing
import com.medithings.vesiscan.walldetect.algo.methodd.MethodDTgc
import org.junit.Test
import java.io.File

/**
 * Python vs Kotlin bit-perfect 정밀 대조용 dump.
 *
 * cm=1 세션 첫 10 cycle 평균 (trace 0) 을 pipeline 각 단계에 흘리면서 결과를 JSON 으로 저장.
 * scratchpad/precision_python.json 과 비교해 divergence 지점 특정.
 */
class PrecisionDumpTest {

    private val session = "c:/Projects/medilightv2android/data123/dwjang_HUMAN-kai_VBT26050202_SUPINE_ALIGN_1CM_2026-07-06_164231.json"
    private val outPath = "C:/Users/장동우/AppData/Local/Temp/claude/c--Projects-medilightv2android/76311e3b-2bb5-4c52-ab8a-8d89cb1052c2/scratchpad/precision_kotlin.json"

    private fun loadFirstTrace(path: String, win: Int = 10): List<DoubleArray> {
        val root = JsonParser.parseReader(File(path).bufferedReader()).asJsonObject
        val recs = root.getAsJsonArray("records")
        val cycles = mutableListOf<List<DoubleArray>>()
        for (r in recs) {
            if (cycles.size >= win) break
            val obj = r.asJsonObject
            val chs = obj.getAsJsonArray("channels") ?: continue
            if (chs.size() != 6) continue
            val byCh = HashMap<Int, DoubleArray>()
            for (ce in chs) {
                val co = ce.asJsonObject
                val ch = co.get("ch").asInt
                val data = co.getAsJsonArray("data") ?: continue
                if (data.size() != 100) continue
                byCh[ch] = DoubleArray(100) { data[it].asDouble }
            }
            if (byCh.size != 6) continue
            cycles.add((0..5).map { byCh[it]!! })
        }
        // 첫 10 cycle 평균 = trace 0
        val nCh = cycles[0].size
        return List(nCh) { ch ->
            val len = cycles[0][ch].size
            DoubleArray(len) { i ->
                var s = 0.0
                for (c in cycles) s += c[ch][i]
                s / cycles.size
            }
        }
    }

    @Test
    fun `dump pipeline intermediates for cm=1 trace 0`() {
        PiezoHW.activePreset = PiezoHW.DevicePreset.V1
        val trace = loadFirstTrace(session, 10)
        val params = MethodDParams.DEFAULT
        val nCh = trace.size

        val out = HashMap<String, Any?>()
        out["input_signal"] = trace.map { it.toList() }

        // per-channel: heavy / light / TGC / detect
        val heavyList = trace.map { MethodDPreprocessing.preprocessHeavy(it, params) }
        val lightList = trace.map { MethodDPreprocessing.preprocessLight(it) }
        val heavyTgc = MethodDTgc.applyTgcPipeline(heavyList)
        val lightTgc = MethodDTgc.applyTgcPipeline(lightList)

        val perCh = mutableListOf<Map<String, Any?>>()
        for (ch in 0 until nCh) {
            val angle = PiezoHW.degreeAll[ch]
            val chRatio = params.otsuRatio * kotlin.math.cos(Math.toRadians(angle))
            val r = MethodDDetector.detect(
                raw = trace[ch],
                denoisedHeavy = heavyTgc[ch],
                denoisedLight = lightTgc[ch],
                otsuRatioOverride = chRatio,
                params = params,
            )
            val m = LinkedHashMap<String, Any?>()
            m["ch"] = ch
            m["angle_deg"] = angle
            m["otsu_ratio_applied"] = chRatio
            m["heavy"] = heavyList[ch].take(20)
            m["light"] = lightList[ch].take(20)
            m["heavy_tgc"] = heavyTgc[ch].take(20)
            m["light_tgc"] = lightTgc[ch].take(20)
            m["ant"] = r?.ant
            m["post"] = r?.post
            // MethodDResult 의 refined 필드 이름 확인 필요 (Python: ant_refined / post_refined)
            m["ant_refined"] = r?.let { runCatching { it.javaClass.getDeclaredField("antRefined").also { f -> f.isAccessible = true }.get(it) }.getOrNull() }
            m["post_refined"] = r?.let { runCatching { it.javaClass.getDeclaredField("postRefined").also { f -> f.isAccessible = true }.get(it) }.getOrNull() }
            m["low_start"] = r?.lowStart
            m["low_end"] = r?.lowEnd
            m["low_amp"] = r?.lowAmp
            perCh.add(m)
        }
        out["per_channel"] = perCh

        // walls base (apply_cross=false) — Python 매칭 위해 refined 우선
        val wallsBase = MethodDRunner.detectMultichannel(trace, params, applyCross = false)
        out["walls_base"] = wallsBase.map { r ->
            r?.let { listOf(it.antRefined, it.postRefined, it.lowStart, it.lowEnd) }
        }
        // walls cross (apply_cross=true)
        val wallsCross = MethodDRunner.detectMultichannel(trace, params, applyCross = true)
        out["walls_cross"] = wallsCross.map { r ->
            r?.let { listOf(it.antRefined, it.postRefined, it.lowStart, it.lowEnd) }
        }

        // BV — Python `extract_walls` 는 refined ant/post 우선 사용 → subsample 정밀도 유지
        val allWalls: List<Pair<Double, Double>?> = wallsCross.map { r ->
            r?.let { Pair(it.antRefined, it.postRefined) }
        }
        val bv = estimateBladderVolume6ch(allWalls)
        out["bv"] = bv?.let {
            val m = LinkedHashMap<String, Any?>()
            m["volume_ml"] = it.volumeMl
            m["volume_mm3"] = it.volumeMm3
            m["valid_channels"] = it.validChannels
            m["lr_ratio"] = it.lrRatio
            m["d_ant_mm"] = it.dAntMm.toList()
            m["d_post_mm"] = it.dPostMm.toList()
            m["D_mm"] = it.dMm.toList()
            m["bottom_h_mm"] = it.bottomHMm
            m["top_h_mm"] = it.topHMm
            m["V_bottom_mm3"] = it.vBottomMm3
            m["V_top_mm3"] = it.vTopMm3
            m
        }

        File(outPath).writeText(Gson().toJson(out))
        println("saved: $outPath")
        println("  bv.volume_ml = ${bv?.volumeMl?.let { "%.4f".format(it) }}")
        for (i in 0 until nCh) {
            val r = perCh[i]
            println("  ch$i: ant=${r["ant"]}  post=${r["post"]}  angle=${r["angle_deg"]}")
        }
    }
}