#!/bin/bash

get_target_elf_name() {
    if [ -f "./Makefile" ]; then
        grep -oP '\S+\.elf' Makefile | head -n 1
    else
        echo ""
    fi
}

find_pcsx2() {
    if [ -n "$CUSTOM_PCSX2_PATH" ]; then
        echo "$CUSTOM_PCSX2_PATH"
        return 0
    fi

    # Check flatpak
    if command -v flatpak >/dev/null 2>&1 && flatpak list | grep -q "net.pcsx2.PCSX2"; then
        echo "flatpak run net.pcsx2.PCSX2"
        return 0
    fi

    # Check if pcsx2-qt is in PATH
    if command -v pcsx2-qt >/dev/null 2>&1; then
        echo "pcsx2-qt"
        return 0
    fi

    # Check if pcsx2 is in PATH
    if command -v pcsx2 >/dev/null 2>&1; then
        echo "pcsx2"
        return 0
    fi

    echo "Error: PCSX2 not found! Please install it, put it in PATH, or specify CUSTOM_PCSX2_PATH in this script." >&2
    return 1
}

run_pcsx2() {
    local pcsx2_cmd
    if ! pcsx2_cmd=$(find_pcsx2); then
        # Handle the error here, at the top level
        exit 1
    fi
    local -a pcsx2_args
    read -ra pcsx2_args <<< "$pcsx2_cmd"

    local elf_name
    elf_name=$(get_target_elf_name)
    if [ -z "$elf_name" ]; then
        echo "Error: Could not find target ELF name in Makefile!" >&2
        exit 1
    fi

    local target_file
    target_file="$(pwd)/bin/$elf_name"
    if [ ! -f "$target_file" ]; then
        echo "Error: ELF file not found at $target_file. Did you build the project?" >&2
        exit 1
    fi

    # Kill existing PCSX2 instances
    if [[ "$pcsx2_cmd" == *"flatpak"* ]]; then
        pkill -f "net.pcsx2.PCSX2" >/dev/null 2>&1 || true
        pkill -f "pcsx2-qt" >/dev/null 2>&1 || true
    else
        local bin_name
        bin_name=$(basename "$pcsx2_cmd")
        pkill "$bin_name" >/dev/null 2>&1 || true
    fi

    echo "Running PCSX2: $pcsx2_cmd -elf $target_file"

    nohup "${pcsx2_args[@]}" -elf "$target_file" > /dev/null 2>&1 &
    disown
}

run_pcsx2