from flask import Flask, render_template, abort, send_file
import os
import json
from typing import List
import markdown as md
from dataclasses import dataclass
from dataclasses_json import DataClassJsonMixin

app = Flask(__name__)

@dataclass
class ArtifactItem(DataClassJsonMixin):
    file: str
    description: str
    width: int = 0


@dataclass
class Artifact(DataClassJsonMixin):
    id: str
    date: str
    changelog: str
    artifacts: List[ArtifactItem]
    hash: str = None


@dataclass
class ProjectInfo(DataClassJsonMixin):
    name: str
    commit_url: str


class Project:
    id: str
    info: ProjectInfo

    def get_artifacts(self) -> List[Artifact]:
        result = []
        artifacts_path = os.path.join("../builds", self.id, "artifacts")
        artifact_folders = sorted([folder.path for folder in os.scandir(
            artifacts_path) if folder.is_dir()], reverse=True)

        for artifact_folder in artifact_folders:
            info_file_path = os.path.join(artifact_folder, "info.json")
            if not os.path.exists(info_file_path):
                continue
            try:
                with open(info_file_path, "r", encoding="utf-8") as f:
                    artifact = Artifact.from_json(f.read())
                    artifact.date = artifact.date.strip()
                    maxwidth = max((len(a.file)
                                    for a in artifact.artifacts), default=0)
                    for a in artifact.artifacts:
                        a.width = maxwidth

                    result.append(artifact)
            except:
                continue
        return result


def get_projects() -> List[Project]:
    result = []
    projects = [f.path for f in os.scandir("../builds") if f.is_dir()]
    for project in projects:
        info_path = os.path.join(project, "info.json")
        if not os.path.exists(info_path):
            continue
        try:
            proj = Project()
            _, proj.id = os.path.split(project)
            with open(info_path, "r", encoding="utf-8") as f:
                proj.info = ProjectInfo.from_json(f.read())
            result.append(proj)
        except:
            continue
    return result


@app.route("/projects/<string:project_id>/<string:artifact_id>/<string:download_item>")
def download_item(project_id, artifact_id, download_item):
    file_path = os.path.join("../builds", project_id,
                             "artifacts", artifact_id, download_item)
    if not os.path.exists(file_path):
        return abort(404)
    return send_file(file_path)


@app.route("/projects/<string:project_id>")
def display_project(project_id):
    projects = get_projects()

    selected_project = next(
        (project for project in projects if project.id == project_id), None)
    if not selected_project:
        return abort(404)

    info_path = os.path.join("../builds", selected_project.id, "info.md")
    readme = None
    try:
        if os.path.exists(info_path):
            with open(info_path, "r", encoding="utf-8") as f:
                readme = md.markdown(f.read())
    except:
        readme = None

    artifacts = selected_project.get_artifacts()

    return render_template("project_view.html", projects=projects, selected_project=selected_project, readme=readme, artifacts=artifacts)


@app.route("/")
def index():
    projects = get_projects()
    return render_template("main.html", projects=projects)


if __name__ == "__main__":
    app.run(host='0.0.0.0')