import re
import sys
from datetime import datetime
from typing import Any, Dict
from consolemd import Renderer

import base32_crockford as base32

import api.stories
from config import Config
from util import print_wrap
from . import COLOR_HEADER, COLOR_TITLE, COLOR_WHITE, _format_state, _get_persons


def __print_story(story: Dict[str, Any]) -> None:
    """
    Prints the title, the current state and the estimate of the story, if
    available.

    TODO: Split up in functions.
    """
    COLOR_TITLE.print(story["name"])
    print(story["url"], end="\n\n")

    if "current_state" in story:
        state = _format_state(story["current_state"])
        COLOR_HEADER.print("State:", state, end="")

        if story["current_state"] == "accepted":
            print(f" (at {story['accepted_at']})", end="")

        print(end="\n\n")

    if "estimate" in story:
        COLOR_HEADER.print("Estimate: ", end="")
        print(story["estimate"], "points", end="")
        if len(story.get("owner_ids", [])) > 1:
            points = story["estimate"] / len(story["owner_ids"])
            print(f" ({points} each)", end="")
        print(end="\n\n")


def __print_owners(story: Dict[str, Any], persons: Dict[int, Any]) -> None:
    """Prints the owners of the story, if available."""
    if story.get("owner_ids"):
        COLOR_HEADER.print("Owners:")

        owners = []
        for owner_id in story["owner_ids"]:
            name = persons[owner_id]["name"]
            initials = persons[owner_id]["initials"]
            owners.append(f"  - {name} ({initials})")

        print("\n".join(owners), end="\n\n")


def __print_description(story: Dict[str, Any]) -> None:
    """Prints the description of the story, if available."""
    COLOR_HEADER.print("Description:")
    if "description" in story:
        description = story["description"].strip()
        Renderer().render(description, width=80)
        print()
    else:
        print("  (No description)", end="\n\n")


def __print_labels(story: Dict[str, Any]) -> None:
    """Prints the labels of the story, if available."""
    if not story.get("labels"):
        return

    COLOR_HEADER.print("Labels:")

    template = "\033[97;48;5;22m {} \033[0m"
    labels = "  ".join(template.format(label["name"]) for label in story["labels"])

    print(f"  {labels}", end="\n\n")


def __print_tasks(project_id: int, story_id: int) -> None:
    """Prints the tasks of the story, if available."""
    tasks = api.stories.get_tasks(project_id, story_id)

    if tasks:
        COLOR_HEADER.print("Tasks:")

    for task in tasks:
        print(end="  ")
        print("[X]" if task["complete"] else "[ ]", end=" \033[34m")
        print(base32.encode(task["id"]), end=":\033[0m ")
        print(task["description"])

    print()


def __print_comments(
    project_id: int, story_id: int, persons: Dict[int, Dict[str, Any]]
) -> None:
    """Prints the comments on the story, if available."""
    comments = api.stories.get_comments(project_id, story_id)

    if comments:
        COLOR_HEADER.print("Comments:")

    for comment in comments:
        text = comment.get("text", "[Empty comment]").strip()
        print_wrap(text, indent="  ")

        person_id = comment["person_id"]
        name = persons[person_id]["name"]
        COLOR_WHITE.print("   -", name, end=" ")

        date = datetime.strptime(comment["created_at"], "%Y-%m-%dT%H:%M:%SZ")
        date_str = date.strftime("on %a %Y-%m-%d at %H:%M")
        print(date_str, end="\n\n")


def __print_blockers(project_id: int, story_id: int) -> None:
    """Prints the stories that block this story, if available."""
    blockers = api.stories.get_blockers(project_id, story_id)

    if blockers:
        COLOR_HEADER.print("Blockers:")

    def blocker_repl(matchgroup: Any) -> str:
        id = int(matchgroup.group(1))
        code = base32.encode(id)
        return COLOR_HEADER.format(code)

    pattern = re.compile(r"#(\d+)")
    for blocker in blockers:
        resolved = "X" if blocker["resolved"] else " "
        desc = pattern.sub(blocker_repl, blocker["description"])
        print(f"  [{resolved}] {desc}")


def stories_info(story_b32: str) -> None:
    story_id = base32.decode(story_b32)
    story = api.stories.get(story_id)

    project_id = story["project_id"]
    persons = _get_persons(project_id)

    __print_story(story)
    __print_owners(story, persons)
    __print_description(story)
    __print_labels(story)
    __print_tasks(project_id, story_id)
    __print_comments(project_id, story_id, persons)
    __print_blockers(project_id, story_id)