use crate::audio_converter::convert_audio_to_aac;
use crate::dry_run::{print_shell_script_header, ShellScript};
use crate::file_finder::{find_audio_file, find_largest_video_file};
use crate::video_merger::merge_video_and_audio;
use std::io::Result;
use std::path::Path;

pub fn merge_video_from_path(path: &Path, dry_run: bool, overwrite: bool) -> Result<()> {
    if dry_run {
        println!("=== DRY RUN MODE ===");
        println!("This is a dry run. Below is the shell script that would be executed:");
        println!();
        print_shell_script_header();
    }

    println!("Step 1: Searching for video file in: {}", path.display());
    let video_path = find_largest_video_file(path)?;
    println!("Found video file: {}", video_path.display());

    if dry_run {
        let mut script = ShellScript::new();
        script.add_comment("File paths");
        script.add_variable("VIDEO_FILE", &video_path);
        crate::dry_run::print_shell_script(&script);
    }

    println!("Step 2: Looking for corresponding audio file...");
    let audio_path = find_audio_file(&video_path)?;
    println!("Found audio file: {}", audio_path.display());

    if dry_run {
        let mut script = ShellScript::new();
        script.add_variable("AUDIO_FILE", &audio_path);
        crate::dry_run::print_shell_script(&script);
    }

    println!();
    println!("Step 3: Converting audio to AAC format...");
    let aac_path = convert_audio_to_aac(&audio_path, dry_run, overwrite)?;
    println!();

    println!("Step 4: Merging video and audio...");
    let output_path = merge_video_and_audio(&video_path, &aac_path, dry_run, overwrite)?;

    if dry_run {
        println!();
        println!("=== DRY RUN COMPLETE ===");
        println!("To actually perform these operations, run without -n flag.");
        println!("You can also copy the shell script above and execute it manually.");
    } else {
        println!();
        println!("=== MERGE COMPLETE ===");
        println!("Video file: {}", output_path.display());
    }

    Ok(())
}