diff --git a/emfit/__init__.py b/emfit/__init__.py
index e69de29..a7e6077 100644
--- a/emfit/__init__.py
+++ b/emfit/__init__.py
@@ -0,0 +1,138 @@
+from kython import json_load
+from datetime import datetime
+from os.path import join
+from functools import lru_cache
+
+from datetime import timedelta, datetime
+from typing import List, Dict, Iterator
+
+fromts = datetime.fromtimestamp
+
+def hhmm(minutes):
+    return '{:02d}:{:02d}'.format(*divmod(minutes, 60))
+
+PATH = "/L/backups/emfit/"
+
+AWAKE = 4
+
+class Emfit:
+    def __init__(self, jj):
+        self.jj = jj
+
+    @property
+    def hrv_morning(self):
+        return self.jj['hrv_rmssd_morning']
+
+    @property
+    def hrv_evening(self):
+        return self.jj['hrv_rmssd_evening']
+
+    @property
+    def date(self):
+        return self.end.date()
+
+    @property
+    def start(self):
+        return fromts(self.jj['time_start'])
+
+    @property
+    def end(self):
+        return fromts(self.jj['time_end'])
+
+    @property
+    def epochs(self):
+        return self.jj['sleep_epoch_datapoints']
+
+    @property
+    @lru_cache()
+    def sleep_start(self) -> datetime:
+        for [ts, e] in self.epochs:
+            if e == AWAKE:
+                continue
+            return fromts(ts)
+        raise RuntimeError
+
+    @property
+    @lru_cache()
+    def sleep_end(self) -> datetime:
+        for [ts, e] in reversed(self.epochs):
+            if e == AWAKE:
+                continue
+            return fromts(ts)
+        raise RuntimeError
+# 'sleep_epoch_datapoints'
+# [[timestamp, number]]
+
+    # so it's actual sleep, without awake
+    # ok, so I need time_asleep
+    @property
+    def sleep_minutes(self):
+        return self.jj['sleep_duration'] // 60
+
+    @property
+    def hrv_lf(self):
+        return self.jj['hrv_lf']
+
+    @property
+    def hrv_hf(self):
+        return self.jj['hrv_hf']
+
+    @property
+    def summary(self):
+        return f"for {hhmm(self.sleep_minutes)} hrv: [{self.hrv_morning:.0f} {self.hrv_evening:.0f} {self.hrv_morning - self.hrv_evening:3.0f} {self.hrv_lf}/{self.hrv_hf}]"
+
+
+# measured_datapoints
+# [[timestamp, pulse, breath?, ??? hrv?]] # every 4 seconds?
+    @property
+    def sleep_hr(self):
+        tss = []
+        res = []
+        for ll in self.jj['measured_datapoints']:
+            [ts, pulse, br, activity] = ll
+            # TODO what the fuck is whaat?? It can't be HRV, it's about 500 ms on average
+            # act in csv.. so it must be activity? wonder how is it measured.
+            # but I guess makes sense. yeah,  "measured_activity_avg": 595, about that
+            # makes even more sense given tossturn datapoints only have timestamp
+            if self.sleep_start < fromts(ts) < self.sleep_end:
+                tss.append(ts)
+                res.append(pulse)
+        return tss, res
+
+    @property
+    def hrv(self):
+        tss = []
+        res = []
+        for ll in self.jj['hrv_rmssd_datapoints']:
+            [ts, rmssd, _, _, almost_always_zero, _] = ll
+            # timestamp,rmssd,tp,lfn,hfn,r_hrv
+            # TP is total_power??
+            # erm. looks like there is a discrepancy between csv and json data.
+            # right, so web is using api v 1. what if i use v1??
+            # definitely a discrepancy between v1 and v4. have no idea how to resolve it :(
+            # also if one of them is indeed tp value, it must have been rounded.
+            # TODO what is the meaning of the rest???
+            # they don't look like HR data.
+            tss.append(ts)
+            res.append(rmssd)
+        return tss, res
+
+    @property
+    def sleep_hr_coverage(self):
+        tss, hrs = self.sleep_hr
+        covered_sec = len([h for h in hrs if h is not None])
+        expected_sec = self.sleep_minutes * 60 / 4
+        return covered_sec / expected_sec * 100
+
+def iter_datas() -> Iterator[Emfit]:
+    import os
+    for f in sorted(os.listdir(PATH)):
+        if not f.endswith('.json'):
+            continue
+
+        with open(join(PATH, f), 'r') as fo:
+            ef = Emfit(json_load(fo))
+            yield ef
+
+def get_datas() -> List[Emfit]:
+    return list(sorted(list(iter_datas()), key=lambda e: e.start))
diff --git a/plot.py b/plot.py
new file mode 100644
index 0000000..f6e3139
--- /dev/null
+++ b/plot.py
@@ -0,0 +1,128 @@
+import matplotlib.dates as md # type: ignore
+import numpy as np # type: ignore
+import seaborn as sns # type: ignore
+import matplotlib.pyplot as plt
+
+
+def plot_file(jj: str):
+    pts = jj['sleep_epoch_datapoints']
+
+
+    tss = [datetime.fromtimestamp(p[0]) for p in pts]
+    vals = [p[1] for p in pts]
+
+    plt.figure(figsize=(20,10))
+    plt.plot(tss, vals)
+
+
+    xformatter = md.DateFormatter('%H:%M')
+    xlocator = md.MinuteLocator(interval = 15)
+
+    ## Set xtick labels to appear every 15 minutes
+    plt.gcf().axes[0].xaxis.set_major_locator(xlocator)
+
+    ## Format xtick labels as HH:MM
+    plt.gcf().axes[0].xaxis.set_major_formatter(xformatter)
+
+
+
+    plt.xlabel('time')
+    plt.ylabel('phase')
+    plt.title('Sleep phases')
+    plt.grid(True)
+    plt.savefig(f"{f}.png")
+    plt.close() # TODO
+    # plt.show()
+
+    pass
+
+
+def plot_all():
+    for jj in iter_datas():
+        plot_file(jj)
+
+
+# def stats():
+#     for jj in iter_datas():
+#         # TODO fimezone??
+#         # TODOgetinterval on 16 aug -- err it's pretty stupid. I shouldn't count bed exit interval...
+#         st = fromts(jj['time_start'])
+#         en = fromts(jj['time_end'])
+#         tfmt = "%Y-%m-%d %a"
+#         tot_mins = 0
+#         res = []
+#         res.append(f"{st.strftime(tfmt)} -- {en.strftime(tfmt)}")
+#         for cls in ['rem', 'light', 'deep']:
+#             mins = jj[f'sleep_class_{cls}_duration'] // 60
+#             res += [cls, hhmm(mins)]
+#             tot_mins += mins
+#         res += ["total", hhmm(tot_mins)]
+#         print(*res)
+
+
+def stats():
+    datas = get_datas()
+    cur = datas[0].date
+    for jj in datas:
+        # import ipdb; ipdb.set_trace() 
+        while cur < jj.date:
+            cur += timedelta(days=1)
+            if cur.weekday() == 0:
+                print("---")
+            if cur != jj.date:
+                print(" ")
+        # cur = jj.date
+        print(f"{jj.date.strftime('%m.%d %a')} {jj.hrv_morning:.0f} {jj.hrv_evening:.0f} {jj.hrv_morning - jj.hrv_evening:3.0f} {hhmm(jj.sleep_minutes)} {jj.hrv_lf}/{jj.hrv_hf} {jj.sleep_hr_coverage:3.0f}")
+
+
+def plot_recovery_vs_hr_percentage():
+    sns.set(color_codes=True)
+    xs = []
+    ys = []
+    for jj in get_datas():
+        xs.append(jj.hrv_morning - jj.hrv_evening)
+        ys.append(jj.sleep_hr_coverage)
+    ax = sns.regplot(x=xs, y=ys) # "recovery", y="percentage", data=pdata)
+    ax.set(xlabel='recovery', ylabel='percentage')
+    plt.show()
+
+
+def plot_hr():
+    jj = get_datas()[-1]
+    tss, uu = jj.sleep_hr
+    tss = tss[::10]
+    uu = uu[::10]
+    plt.figure(figsize=(15,4))
+    ax = sns.pointplot(tss, uu, markers=" ")
+    ax.set(ylim=(None, 1000))
+
+    plt.show()
+
+# TODO ok, would be nice to have that every morning in timeline
+# also timeline should have dynamic filters? maybe by tags
+# then I could enable emfit feed and slog feed (pulled from all org notes) and see the correlation? also could pull workouts provider (and wlog) -- actually wlog processing could be moved to timeline too
+
+# TODO could plot 'recovery' thing and see if it is impacted by workouts
+
+
+# TODO time_start, time_end
+
+# plot_hrv()
+# stats()
+# plot_recovery_vs_hr_percentage()
+# stats()
+# import matplotlib
+# matplotlib.use('Agg')
+
+
+# TODO maybe rmssd should only be computed if we have a reasonable chunk of datas
+# also, trust it only if it's stable
+
+# plot_timestamped([p[0] for p in pts], [p[1] for p in pts], mavgs=[]).savefig('res.png')
+# TODO X axes: show hours and only two dates
+# TODO 4 is awake, 3 REM, 2 light, 1 deep
+
+
+
+
+# deviartion beyond 25-75 or 75-25 is bad??