"""Flask-based ticketing system web application."""

from flask import Flask, redirect, render_template, request, url_for

from models import Ticket, TicketPriority, TicketStatus
from store import get_store

app = Flask(__name__)


# ── helper ───────────────────────────────────────────────────────

def _priorities() -> list[tuple[str, str]]:
    return [(p.value, p.name.replace("_", " ").title()) for p in TicketPriority]


def _statuses() -> list[tuple[str, str]]:
    return [(s.value, s.name.replace("_", " ").title()) for s in TicketStatus]


def _ticket_from_form() -> Ticket:
    return Ticket(
        title=request.form.get("title", "").strip(),
        description=request.form.get("description", "").strip(),
        priority=TicketPriority(request.form.get("priority", "medium")),
        status=TicketStatus(request.form.get("status", "open")),
        assignee=request.form.get("assignee", "").strip(),
        project=request.form.get("project", "").strip(),
    )


# ── routes ───────────────────────────────────────────────────────

@app.route("/")
def index() -> str:
    store = get_store()
    status_filter = request.args.get("status", "")
    priority_filter = request.args.get("priority", "")
    project_filter = request.args.get("project", "")
    search = request.args.get("search", "")

    tickets = store.list_tickets(
        status=status_filter or None,
        priority=priority_filter or None,
        search=search or None,
        project=project_filter or None,
    )
    counts = store.count_by_status()
    projects = store.get_projects()

    return render_template(
        "index.html",
        tickets=tickets,
        status_filter=status_filter,
        priority_filter=priority_filter,
        project_filter=project_filter,
        search=search,
        counts=counts,
        priorities=_priorities(),
        statuses=_statuses(),
        projects=projects,
    )


@app.route("/tickets/new", methods=["GET", "POST"])
def create_ticket() -> str:
    if request.method == "POST":
        ticket = _ticket_from_form()
        if not ticket.title:
            return render_template(
                "create.html",
                priorities=_priorities(),
                statuses=_statuses(),
                ticket=ticket,
                error="Title is required.",
            )
        store = get_store()
        store.create_ticket(ticket)
        return redirect(url_for("index"))

    return render_template(
        "create.html",
        priorities=_priorities(),
        statuses=_statuses(),
        ticket=None,
    )


@app.route("/tickets/<int:ticket_id>")
def view_ticket(ticket_id: int) -> str:
    store = get_store()
    ticket = store.get_ticket(ticket_id)
    if ticket is None:
        return "Ticket not found", 404
    return render_template(
        "detail.html",
        ticket=ticket,
        priorities=_priorities(),
        statuses=_statuses(),
    )


@app.route("/tickets/<int:ticket_id>/edit", methods=["GET", "POST"])
def edit_ticket(ticket_id: int) -> str:
    store = get_store()
    ticket = store.get_ticket(ticket_id)
    if ticket is None:
        return "Ticket not found", 404

    if request.method == "POST":
        title = request.form.get("title", "").strip()
        if not title:
            return render_template(
                "edit.html",
                ticket=ticket,
                priorities=_priorities(),
                statuses=_statuses(),
                error="Title is required.",
            )
        updates = {
            "title": title,
            "description": request.form.get("description", "").strip(),
            "priority": TicketPriority(request.form.get("priority", "medium")),
            "status": TicketStatus(request.form.get("status", "open")),
            "assignee": request.form.get("assignee", "").strip(),
            "project": request.form.get("project", "").strip(),
        }
        store.update_ticket(ticket_id, updates)
        return redirect(url_for("view_ticket", ticket_id=ticket_id))

    return render_template(
        "edit.html",
        ticket=ticket,
        priorities=_priorities(),
        statuses=_statuses(),
    )


@app.route("/tickets/<int:ticket_id>/delete", methods=["POST"])
def delete_ticket(ticket_id: int) -> str:
    store = get_store()
    store.delete_ticket(ticket_id)
    return redirect(url_for("index"))


# ── entrypoint ───────────────────────────────────────────────────

if __name__ == "__main__":
    app.run(debug=True, host="0.0.0.0", port=5000)