from flask import (Blueprint, redirect, render_template, request, url_for)

from exquisite_branch.db import get_db
from werkzeug.exceptions import abort
from werkzeug.utils import secure_filename

from shortuuid import uuid

bp = Blueprint('write', __name__, url_prefix='/write')


@bp.route('/<tree>/<parent>', methods=('GET', 'POST'))
def write(tree=None, parent=None):
    db = get_db()

    if request.method == 'POST':
        content = request.form.get('content')
        branch = request.form.get('branch')
        username = request.form.get('username')
        if request.is_json:
            data = request.get_json()
            content = data['content']
            branch = data['branch']
            username = data['username']

        db.execute(
            'INSERT INTO branches (content, parent, branch, username, tree) VALUES (?, ?, ?, ?, ?)',
            (content, parent, branch, username, tree)
        )
        db.commit()
        print(url_for('share.share', tree=tree, branch=branch))
        return redirect(url_for('share.share', tree=tree, branch=branch))

    branch = uuid()

    previous = db.execute(
        "SELECT content, branch, parent FROM branches"
        " WHERE branch = ? AND tree = ?",
        (parent, tree)
    ).fetchone()
    if previous is None:
        abort(404, f"Previous with id {parent} doesn't exist")

    return render_template('write.html', tree=tree, parent=parent, content=previous['content'], branch=branch)


@bp.route('/last', methods=('GET', 'POST'))
def last():
    branch = uuid()
    db = get_db()
    previous = db.execute(
        'SELECT * FROM branches ORDER BY id DESC LIMIT 1'
    ).fetchone()

    parent = previous['branch']
    tree = previous['tree']

    if request.method == 'POST':
        content = request.form['content']
        branch = request.form['branch']
        username = request.form['username']

        db.execute(
            'INSERT INTO branches (content, parent, branch, username, tree) VALUES (?, ?, ?, ?, ?)',
            (content, parent, branch, username, tree)
        )
        db.commit()
        return redirect(url_for('share.share', tree=tree, branch=branch))

    return render_template('write.html', tree=tree, parent=parent, content=previous['content'], branch=branch)


@bp.route('/', methods=('GET', 'POST'))
def new():
    db = get_db()
    branch = uuid()
    parent = 'NEW'

    if request.method == 'POST':
        content = request.form['content']
        branch = request.form['branch']
        username = request.form['username']
        tree_name = request.form['tree_name']

        if tree_name == '':
            return redirect(url_for('write.new'))

        tree = secure_filename(tree_name)

        db.execute(
            'INSERT INTO trees (name, slug) VALUES (?, ?)',
            (tree_name, tree)
        )

        db.execute(
            'INSERT INTO branches (content, parent, branch, username, tree) VALUES (?, ?, ?, ?, ?)',
            (content, parent, branch, username, tree)
        )
        db.commit()
        return redirect(url_for('share.share', tree=tree, branch=branch))

    return render_template('write.html', parent=parent, branch=branch)