from __future__ import annotations

from pathlib import Path

from fastapi import FastAPI, HTTPException
from pydantic import BaseModel, Field

from .service import CivicSwarmService


class ProposalCreate(BaseModel):
    city: str
    title: str
    body: str
    geography: str = ""
    tags: list[str] = Field(default_factory=list)


class ResidentCreate(BaseModel):
    resident_key: str
    geography: str = ""
    interests: list[str] = Field(default_factory=list)
    lived_experience: list[str] = Field(default_factory=list)
    languages: list[str] = Field(default_factory=list)


class CommentCreate(BaseModel):
    text: str
    channel: str = "mobile"
    resident_key: str | None = None
    geography: str = ""
    metadata: dict = Field(default_factory=dict)


class PreferenceCreate(BaseModel):
    resident_key: str
    score: float
    channel: str = "mobile"


def create_app(db_path: str | Path = ":memory:") -> FastAPI:
    service = CivicSwarmService.from_path(db_path)
    app = FastAPI(title="CivicSwarm", version="0.1.0")
    app.state.service = service

    @app.post("/proposals")
    def create_proposal(payload: ProposalCreate):
        return service.create_proposal(payload.city, payload.title, payload.body, payload.geography, payload.tags)

    @app.post("/residents")
    def create_resident(payload: ResidentCreate):
        return service.register_resident(payload.resident_key, payload.geography, payload.interests, payload.lived_experience, payload.languages)

    @app.post("/proposals/{proposal_id}/comments")
    def create_comment(proposal_id: int, payload: CommentCreate):
        try:
            return service.add_comment(proposal_id, payload.text, payload.channel, payload.resident_key, payload.geography, payload.metadata)
        except KeyError as exc:
            raise HTTPException(status_code=404, detail=str(exc)) from exc

    @app.post("/proposals/{proposal_id}/preferences")
    def create_preference(proposal_id: int, payload: PreferenceCreate):
        return service.submit_preference(proposal_id, payload.resident_key, payload.score, payload.channel)

    @app.get("/proposals/{proposal_id}/route")
    def route_proposal(proposal_id: int, top_n: int = 3):
        return service.route_proposal(proposal_id, top_n=top_n)

    @app.get("/proposals/{proposal_id}/dashboard")
    def dashboard(proposal_id: int):
        return service.build_dashboard(proposal_id)

    @app.get("/proposals/{proposal_id}/brief")
    def brief(proposal_id: int):
        return service.export_brief(proposal_id)

    @app.get("/proposals/{proposal_id}/ledger")
    def ledger(proposal_id: int):
        return service.list_ledger(proposal_id)

    return app