import datetime
import math

from flask import Flask, render_template, url_for
app = Flask(__name__)

def num2day(num):
    match num:
        case 1:
            return "Monday"
        case 2:
            return "Tuesday"
        case 3:
            return "Wednesday"
        case 4:
            return "Thursday"
        case 5:
            return "Friday"

def latLongToCartesian(lat,long):
    lat = lat*math.pi/180
    long = long*math.pi/180
    x = math.cos(lat)*math.cos(long)
    y = math.cos(lat)*math.sin(long)
    z = math.sin(lat)
    return x,y,z

def cartesianToLatLong(x,y,z):
    long = math.atan2(y,x)
    hyp = math.sqrt(x*x + y*y)
    lat = math.atan2(z,hyp)

    lat = lat*180/math.pi
    long = long*180/math.pi

    return lat, long

def getPercentageLatLong(yearPercent,lat1,long1,lat2,long2):
    # http://www.geomidpoint.com/calculation.html
    x1, y1, z1 = latLongToCartesian(lat1,long1)
    x2, y2, z2 = latLongToCartesian(lat2,long2)

    xmid = (x1*(1-yearPercent)+x2*yearPercent)
    ymid = (y1*(1-yearPercent)+y2*yearPercent)
    zmid = (z1*(1-yearPercent)+z2*yearPercent)

    latmid, longmid = cartesianToLatLong(xmid,ymid,zmid)

    return latmid, longmid
    
def workWeek(yearPercent):
    totalNumHours = 40*yearPercent
    numDays = totalNumHours/8
    hoursIntoDay = (numDays - math.floor(numDays))*8
    minutesIntoDay = round((hoursIntoDay - math.floor(hoursIntoDay))*60)
    if minutesIntoDay > 59:
        minutesIntoDay = 0
        hoursIntoDay += 1
    workDatetime = datetime.datetime(year=1970,month=1,day=1,hour=math.floor(hoursIntoDay)+9,minute=minutesIntoDay)
    workTime = workDatetime.strftime("%-I:%M%p")
    return num2day(math.floor(numDays+1)), workTime

def abbeyRoad(yearPercent):
    totalSeconds = 47*60+29 # 47 minutes 29 seconds
    numSeconds = math.floor(totalSeconds*yearPercent);
    # 4:19
    if numSeconds <= 4*60+19:
        return "Come Together"
    # 3:02
    elif numSeconds <= 259+(3*60+2):
        return "Something"
    # 3:27
    elif numSeconds <= 441+(3*60+27):
        return "Maxwell's Silver Hammer"
    # 3:27
    elif numSeconds <= 648+(3*60+27):
        return "Oh! Darling"
    # 2:50
    elif numSeconds <= 855+(2*60+50):
        return "Octopus's Garden"
    # 7:47
    elif numSeconds <= 1025+(7*60+47):
        return "I Want You (She's So Heavy)"
    # 3:05
    elif numSeconds <= 1492+(3*60+5):
        return "Here Comes The Sun"
    # 2:45
    elif numSeconds <= 1677+(2*60+45):
        return "Because"
    # 4:02
    elif numSeconds <= 1842+(4*60+2):
        return "You Never Give Me Your Money"
    # 2:26
    elif numSeconds <= 2084+(2*60+26):
        return "Sun King"
    # 1:06
    elif numSeconds <= 2230+(1*60+6):
        return "Mean Mr. Mustard"
    # 1:12
    elif numSeconds <= 2296+(1*60+12):
        return "Polythene Pam"
    # 1:58
    elif numSeconds <= 2368+(1*60+58):
        return "She Came In Through The Bathroom Window"
    # 1:31
    elif numSeconds <= 2486+(1*60+31):
        return "Golden Slumbers"
    # 1:36
    elif numSeconds <= 2577+(1*60+36):
        return "Carry That Weight"
    # 2:21
    elif numSeconds <= 2673+(2*60+21):
        return "The End"
    # 0:25
    else:
        return "Her Majesty"

def theHobbit():
    pass

def transatlanticFlight(yearPercent):
    lat1 =  51.470020
    long1 = -0.454295

    lat2 = 40.641766
    long2 = -73.780968

    lat, long = getPercentageLatLong(yearPercent,lat1,long1,lat2,long2)
    return round(lat,2), round(long,2)

def getHomoSapiens(yearPercent):
    totalYears = 4.3e9
    yearsUntilHumans = totalYears*(1-yearPercent) - 300e3
    if yearsUntilHumans >= 0:
        return f"Homo Sapiens would evolve in ~{math.floor(yearsUntilHumans)} years."
    else:
        return f"Homo Sapiens have been around for ~{-math.floor(yearsUntilHumans)} years."
    
def getTemplate():
    now = datetime.datetime.now()
    nowTime = now.strftime("%-I:%M%p")
    nowDate = now.strftime("%A") + " " + now.strftime("%-d") + " " + now.strftime("%B")
    
    delta = now - datetime.datetime(day=1,month=1,year=now.year)
    totalDays = datetime.datetime(day=1,month=1,year=now.year+1) - datetime.datetime(day=1,month=1,year=now.year)
    
    yearPercent = delta/totalDays
    footballMinute = math.floor(yearPercent*90)
    workDay, workTime = workWeek(yearPercent)
    marathonMile = round(26.2 - math.floor(yearPercent*26.2),2)
    abbeyRoadSong = abbeyRoad(yearPercent)
    hobbitChapter = "having an unexpected party"
    lat, long = transatlanticFlight(yearPercent)
    homoSapiens = getHomoSapiens(yearPercent)

    return now.year, nowTime, nowDate, round(yearPercent*100,2), footballMinute, workDay, workTime, marathonMile, abbeyRoadSong, hobbitChapter, lat, long, homoSapiens

@app.route("/")
def index():
    year, nowTime, nowDate, yearPercent, footballMinute, workDay, workTime, marathonMile, abbeyRoadSong, hobbitChapter, lat, long, homoSapiens = getTemplate()
    cssPath = url_for('static', filename='style.css')
    return render_template("index.html",\
                           cssPath=cssPath,\
                           year=year,\
                           nowTime=nowTime,\
                           nowDate=nowDate,\
                           yearPercent=yearPercent,\
                           footballMinute=footballMinute,\
                           workDay=workDay,\
                           workTime=workTime,\
                           marathonMile=marathonMile,\
                           abbeyRoadSong=abbeyRoadSong,\
                           hobbitChapter=hobbitChapter,\
                           lat=lat,\
                           long=long,\
                           homoSapiens=homoSapiens)