#education purpose
# indie:lang_version = 5
from indie import indicator, param, plot, color, MainContext
from indie.algorithms import Highest, Lowest

@indicator("Support, Resistance and Median with Trend", overlay_main_pane=True)
@param.int("length", default=22, min=1, title="Historical Length")
@plot.line("resistance", color=color.RED, line_width=2, title="Resistance")
@plot.line("support", color=color.GREEN, line_width=2, title="Support")
@plot.line("median", color=color.WHITE, line_width=1, title="Median")
class Main(MainContext):
    def calc(self, length):
        # Calculate support and resistance levels
        highest_high = Highest.new(self.high, length)[0]
        lowest_low = Lowest.new(self.low, length)[0]
        
        # Adjust levels
        resistance_level = highest_high
        support_level = lowest_low
        
        # Calculate median
        median_level = (resistance_level + support_level) / 2
        
        # Trend detection
        is_uptrend = self.close[0] > median_level and self.close[1] > median_level
        is_downtrend = self.close[0] < median_level and self.close[1] < median_level
        
        return resistance_level, support_level, median_level