import json
import re
import subprocess

from enum import Enum
from typing import Callable, TypeVar

from gpt_engineer.ai import AI
from gpt_engineer.chat_to_files import to_files
from gpt_engineer.db import DBs


def setup_sys_prompt(dbs):
    return (
        dbs.preprompts["generate"] + "\nUseful to know:\n" + dbs.preprompts["philosophy"]
    )


Step = TypeVar("Step", bound=Callable[[AI, DBs], list[dict]])


def simple_gen(ai: AI, dbs: DBs):
    """Run the AI on the main prompt and save the results"""
    messages = ai.start(
        setup_sys_prompt(dbs),
        dbs.input["main_prompt"],
    )
    to_files(messages[-1]["content"], dbs.workspace)
    return messages


def clarify(ai: AI, dbs: DBs):
    """
    Ask the user if they want to clarify anything and save the results to the workspace
    """
    messages = [ai.fsystem(dbs.preprompts["qa"])]
    user = dbs.input["main_prompt"]
    while True:
        messages = ai.next(messages, user)

        if messages[-1]["content"].strip().lower().startswith("no"):
            break

        print()
        user = input('(answer in text, or "c" to move on)\n')
        print()

        if not user or user == "c":
            break

        user += (
            "\n\n"
            "Is anything else unclear? If yes, only answer in the form:\n"
            "{remaining unclear areas} remaining questions.\n"
            "{Next question}\n"
            'If everything is sufficiently clear, only answer "no".'
        )

    print()
    return messages


def gen_spec(ai: AI, dbs: DBs):
    """
    Generate a spec from the main prompt + clarifications and save the results to
    the workspace
    """
    messages = [
        ai.fsystem(setup_sys_prompt(dbs)),
        ai.fsystem(f"Instructions: {dbs.input['main_prompt']}"),
    ]

    messages = ai.next(messages, dbs.preprompts["spec"])

    dbs.memory["specification"] = messages[-1]["content"]

    return messages


def respec(ai: AI, dbs: DBs):
    messages = json.loads(dbs.logs[gen_spec.__name__])
    messages += [ai.fsystem(dbs.preprompts["respec"])]

    messages = ai.next(messages)
    messages = ai.next(
        messages,
        (
            "Based on the conversation so far, please reiterate the specification for "
            "the program. "
            "If there are things that can be improved, please incorporate the "
            "improvements. "
            "If you are satisfied with the specification, just write out the "
            "specification word by word again."
        ),
    )

    dbs.memory["specification"] = messages[-1]["content"]
    return messages


def gen_unit_tests(ai: AI, dbs: DBs):
    """
    Generate unit tests based on the specification, that should work.
    """
    messages = [
        ai.fsystem(setup_sys_prompt(dbs)),
        ai.fuser(f"Instructions: {dbs.input['main_prompt']}"),
        ai.fuser(f"Specification:\n\n{dbs.memory['specification']}"),
    ]

    messages = ai.next(messages, dbs.preprompts["unit_tests"])

    dbs.memory["unit_tests"] = messages[-1]["content"]
    to_files(dbs.memory["unit_tests"], dbs.workspace)

    return messages


def gen_clarified_code(ai: AI, dbs: DBs):
    # get the messages from previous step

    messages = json.loads(dbs.logs[clarify.__name__])

    messages = [
        ai.fsystem(setup_sys_prompt(dbs)),
    ] + messages[1:]
    messages = ai.next(messages, dbs.preprompts["use_qa"])

    to_files(messages[-1]["content"], dbs.workspace)
    return messages


def gen_code(ai: AI, dbs: DBs):
    # get the messages from previous step

    messages = [
        ai.fsystem(setup_sys_prompt(dbs)),
        ai.fuser(f"Instructions: {dbs.input['main_prompt']}"),
        ai.fuser(f"Specification:\n\n{dbs.memory['specification']}"),
        ai.fuser(f"Unit tests:\n\n{dbs.memory['unit_tests']}"),
    ]
    messages = ai.next(messages, dbs.preprompts["use_qa"])
    to_files(messages[-1]["content"], dbs.workspace)
    return messages


def execute_entrypoint(ai, dbs):
    command = dbs.workspace["run.sh"]

    print("Do you want to execute this code?")
    print()
    print(command)
    print()
    print('If yes, press enter. Otherwise, type "no"')
    print()
    if input() not in ["", "y", "yes"]:
        print("Ok, not executing the code.")
        return []
    print("Executing the code...")
    print(
        "\033[92m"  # green color
        + "Note: If it does not work as expected, please consider running the code'"
        + " in another way than above."
        + "\033[0m"
    )
    print()
    subprocess.run("bash run.sh", shell=True, cwd=dbs.workspace.path)
    return []


def gen_entrypoint(ai, dbs):
    messages = ai.start(
        system=(
            "You will get information about a codebase that is currently on disk in "
            "the current folder.\n"
            "From this you will answer with code blocks that includes all the necessary "
            "unix terminal commands to "
            "a) install dependencies "
            "b) run all necessary parts of the codebase (in parallell if necessary).\n"
            "Do not install globally. Do not use sudo.\n"
            "Do not explain the code, just give the commands.\n"
            "Do not use placeholders, use example values (like . for a folder argument) "
            "if necessary.\n"
        ),
        user="Information about the codebase:\n\n" + dbs.workspace["all_output.txt"],
    )
    print()

    regex = r"```\S*\n(.+?)```"
    matches = re.finditer(regex, messages[-1]["content"], re.DOTALL)
    dbs.workspace["run.sh"] = "\n".join(match.group(1) for match in matches)
    return messages


def use_feedback(ai: AI, dbs: DBs):
    messages = [
        ai.fsystem(setup_sys_prompt(dbs)),
        ai.fuser(f"Instructions: {dbs.input['main_prompt']}"),
        ai.fassistant(dbs.workspace["all_output.txt"]),
        ai.fsystem(dbs.preprompts["use_feedback"]),
    ]
    messages = ai.next(messages, dbs.input["feedback"])
    to_files(messages[-1]["content"], dbs.workspace)
    return messages


def fix_code(ai: AI, dbs: DBs):
    code_output = json.loads(dbs.logs[gen_code.__name__])[-1]["content"]
    messages = [
        ai.fsystem(setup_sys_prompt(dbs)),
        ai.fuser(f"Instructions: {dbs.input['main_prompt']}"),
        ai.fuser(code_output),
        ai.fsystem(dbs.preprompts["fix_code"]),
    ]
    messages = ai.next(messages, "Please fix any errors in the code above.")
    to_files(messages[-1]["content"], dbs.workspace)
    return messages


class Config(str, Enum):
    DEFAULT = "default"
    BENCHMARK = "benchmark"
    SIMPLE = "simple"
    TDD = "tdd"
    TDD_PLUS = "tdd+"
    CLARIFY = "clarify"
    RESPEC = "respec"
    EXECUTE_ONLY = "execute_only"
    USE_FEEDBACK = "use_feedback"


# Different configs of what steps to run
STEPS = {
    Config.DEFAULT: [
        clarify,
        gen_clarified_code,
        gen_entrypoint,
        execute_entrypoint,
    ],
    Config.BENCHMARK: [simple_gen, gen_entrypoint],
    Config.SIMPLE: [simple_gen, gen_entrypoint, execute_entrypoint],
    Config.TDD: [
        gen_spec,
        gen_unit_tests,
        gen_code,
        gen_entrypoint,
        execute_entrypoint,
    ],
    Config.TDD_PLUS: [
        gen_spec,
        gen_unit_tests,
        gen_code,
        fix_code,
        gen_entrypoint,
        execute_entrypoint,
    ],
    Config.CLARIFY: [
        clarify,
        gen_clarified_code,
        gen_entrypoint,
        execute_entrypoint,
    ],
    Config.RESPEC: [
        gen_spec,
        respec,
        gen_unit_tests,
        gen_code,
        fix_code,
        gen_entrypoint,
        execute_entrypoint,
    ],
    Config.USE_FEEDBACK: [use_feedback, gen_entrypoint, execute_entrypoint],
    Config.EXECUTE_ONLY: [gen_entrypoint, execute_entrypoint],
}

# Future steps that can be added:
# run_tests_and_fix_files
# execute_entrypoint_and_fix_files_if_needed