#!/usr/bin/env python3


import os
import sys
import requests
import time

# We will need to import the `click` package to build the CLI.
import click


# We will also need to import the `fzf` package to use the `fzf` command.
from pyfzf.pyfzf import FzfPrompt as Fzf

XDG_CONFIG_HOME = os.environ.get("XDG_CONFIG_HOME", os.path.expanduser("~/.config"))
CONFIG_DIR = os.path.join(XDG_CONFIG_HOME, "cgpt")
XDG_DATA_HOME = os.environ.get('XDG_DATA_HOME', os.path.expanduser('~/.local/share'))
PROMPTS_URL = "https://raw.githubusercontent.com/f/awesome-chatgpt-prompts/main/prompts.csv"
CACHE_LOCATION = os.path.join(XDG_DATA_HOME, "chatgpt-prompts", "prompts.csv")
PROMPTS_REPO_URL = "https://github.com/f/awesome-chatgpt-prompts"
REPO_PROMPTS_RELPATH = "prompts.csv"

UPDATE_INTERVAL = 1 # update the prompts every 1 days

PR_HELP = """
helper to create a PR from a custom prompt. The output can be appended to the prompts.csv file in the prompts repo. You can
pipe the output of this command to pbcopy or xclip to copy it to your
clipboard.

For example: `./cgpt.py pr | xclip -selection cliboard`

"""

# save custom prompts to my-prompts.csv
CUSTOM_PROMPTS = os.path.join(XDG_DATA_HOME, "chatgpt-prompts", "my-prompts.csv")

def check_update():
    if not os.path.exists(CACHE_LOCATION):
        return

    last_update = os.path.getmtime(CACHE_LOCATION)
    # if last update older than UPDATE_INTERVAL days
    if time.time() - last_update > UPDATE_INTERVAL * 24 * 60 * 60:
        cache_prompts(update=True)


def cache_prompts(update=False):
    '''
    if the prompts are not cached, download them and cache them locally
    '''
    if not os.path.exists(CACHE_LOCATION) or update:
        print("Downloading remote prompts...")
        os.makedirs(os.path.dirname(CACHE_LOCATION), exist_ok=True)
        with open(CACHE_LOCATION, "w") as f:
            f.write(requests.get(PROMPTS_URL).text)
            f.close()

    # init custom prompts if not exists
    if not os.path.exists(CUSTOM_PROMPTS):
        with open(CUSTOM_PROMPTS, "w") as f:
            header = '"act","prompt"\n'
            f.write(header)
            f.close()

def init_config():
    if not os.path.exists(CONFIG_DIR):
        os.makedirs(CONFIG_DIR)


import csv

def load_prompts(custom_only=False):
    '''
    Loads the prompts from the cache. if the cache is empty, download the prompts.
    The prompts csv contains two columns separated by a comma in the form "act", "prompt"
    Returns the list of prompts as tuples
    '''

    cache_prompts()
    prompts = {}

    if not custom_only:
        with open(CACHE_LOCATION, "r", newline='') as f:
            prompts_reader = csv.reader(f)
            next(prompts_reader) # skip header row
            prompts = {row[0]: row[1] for row in prompts_reader}
            f.close()

    with open(CUSTOM_PROMPTS, "r", newline='') as f:
        custom_prompts_reader = csv.reader(f)
        next(custom_prompts_reader) # skip header row
        custom_prompts = {row[0]: row[1] for row in custom_prompts_reader}
        prompts.update(custom_prompts)
        f.close()

    return prompts



# save custom prompts to CUSTOM_PROMPTS
def save_prompt(act, prompt):

    with open(CUSTOM_PROMPTS, "a") as f:
        f.write(f'"{act}","{prompt}"\n')
        f.close()


@click.group()
def cli():
    pass

class Fzfer:
    def __init__(self, prompts):
        self.act_prompt = prompts
        self.fzf = Fzf()
        self.header = "act,prompt"
        self.preview = f"'cat {CACHE_LOCATION} | grep \'{{}}\' '"
        # self.preview = f"{{}}"
        self.preview_window = "right:50%,wrap"

    def show(self):
        return self.fzf.prompt(self.act_prompt, '--header={} --preview-window={} --preview {}'.format(self.header, self.preview_window, self.preview))


# select and return a tuple (act, prompt)
def choose_prompt(custom_only=False):
    prompts = load_prompts(custom_only)
    f = Fzfer(prompts)
    act = f.show()
    prompt = prompts.get(act[0])
    return (act[0], prompt)

def show_prompts():
    act, prompt = choose_prompt()
    print(prompt)

# update refreshes the prompts from the remote repo
@click.command(help="update the prompts from the remote repo")
def update():
    cache_prompts(update=True)

@click.command(help=PR_HELP)
def pr():
    '''
    Helper to create a PR from a custom prompt
    '''
    # select a custom prompt
    act, prompt = choose_prompt(custom_only=True)
    prompt = f'{act},{prompt}'
    print(prompt)

@click.command()
def add():
    act = input("Enter the act title: ")
    prompt = input("Enter the prompt: ")
    save_prompt(act, prompt)

@click.command(help="Show my custom prompts")
def my():
    '''
    Pick custom prompts
    '''
    prompts = load_prompts(custom_only=True)
    f = Fzfer(prompts)
    act = f.show()
    prompt = prompts.get(act[0])
    print(prompt)



cli.add_command(add)
cli.add_command(update)
cli.add_command(pr)
cli.add_command(my)

if __name__ == "__main__":
    check_update()
    if len(sys.argv) == 1:
        show_prompts()
    else:
        cli()