"""Full shop day session orchestrator — ties DayCycle, Economy, Director, Atmosphere."""
from __future__ import annotations

from dataclasses import dataclass, field
from typing import Any, Dict, List, Optional

from game.io.content_db import ContentDB
from game.io.new_game import build_new_game_state
from game.sim.atmosphere import AtmosphereModel
from game.sim.day_cycle import DayCycle, Pace, Phase
from game.sim.director import CustomerDirector
from game.sim.economy import Economy
from game.sim.relationship import RelationshipStore
from game.sim.shop_space import ShopSpace
from game.sim.settings import Settings
from game.sim.telemetry import Telemetry
from game.sim.night_summary import build_night_summary
from game.sim.diary import DiaryPool
from pathlib import Path

@dataclass
class DayReport:
    day_index: int
    enters: int
    sales: int
    revenue: int
    wallet_end: int
    regular_visits: Dict[str, int]
    mood_line: str
    phase_log: List[str] = field(default_factory=list)

class GameSession:
    """Runnable session used by CLI and playtests."""

    def __init__(self, db: Optional[ContentDB] = None, rng_seed: int = 7, pace: Pace = Pace.NORMAL):
        self.db = db or ContentDB.from_project_root()
        self.state = build_new_game_state(self.db)
        pace_raw = self.db.rules.get("pace_multiplier") or {
            "Relaxed": 1.5, "Normal": 1.0, "Brisk": 0.75
        }
        base_raw = self.db.rules.get("phase_duration_base_sec") or {}
        base_sec = None
        if base_raw:
            base_sec = {
                Phase(k): (None if v is None else float(v))
                for k, v in base_raw.items()
            }
        self.day = DayCycle(
            pace=pace,
            day_index=int(self.state["meta"]["day_index"]),
            phase=Phase(self.state["meta"].get("phase", "PREP")),
            pace_multipliers={Pace(k): float(v) for k, v in pace_raw.items()},
            base_sec=base_sec,
        )
        self.economy = Economy.from_state(self.state, self.db)
        self.atmosphere = AtmosphereModel()
        self.atmosphere.light = self.state["shop"].get("light", "warm")
        self.atmosphere.bgm = self.state["shop"].get("bgm", "quiet")
        self.relationships = RelationshipStore.from_state(self.state, rules=self.db.rules)
        self.director = CustomerDirector(
            self.db, self.economy, self.atmosphere, self.relationships, rng_seed=rng_seed
        )
        self.space = ShopSpace()
        try:
            self.space.load_layout(self.state["shop"].get("layout") or [], self.db.furniture)
        except ValueError:
            # layout cells may clip; leave empty space model
            pass
        self.sales_count = 0
        self.revenue = 0
        self.phase_log: List[str] = []
        self._wallet_start_day = self.economy.wallet
        self._hook_director_pay()
        self.settings = Settings(pace=pace)
        self.telemetry = Telemetry(enabled=False)
        diary_path = Path(__file__).resolve().parents[2] / "content/diary/pool.json"
        self.diary = DiaryPool.load(diary_path) if diary_path.exists() else DiaryPool([])

    def _hook_director_pay(self) -> None:
        original = self.director._pay

        def wrapped(agent, day, state):
            before = self.economy.wallet
            original(agent, day, state)
            delta = self.economy.wallet - before
            if delta > 0:
                self.sales_count += 1
                self.revenue += delta

        self.director._pay = wrapped  # type: ignore

    def open_shop(self) -> None:
        if self.day.phase != Phase.PREP:
            raise RuntimeError("open_shop only in PREP")
        self._wallet_start_day = self.economy.wallet
        self.sales_count = 0
        self.revenue = 0
        self.day.confirm_open()
        self.director.on_phase(self.day)
        self.phase_log.append(f"open day={self.day.day_index}")
        self._recompute_atm()

    def sleep(self) -> DayReport:
        if self.day.phase != Phase.NIGHT:
            # force to night for convenience in tests
            while self.day.phase != Phase.NIGHT:
                self.day.skip_phase()
                self.director.on_phase(self.day)
        report = self._make_report()
        self.day.confirm_sleep()
        self.state["meta"]["day_index"] = self.day.day_index
        self.state["meta"]["phase"] = self.day.phase.value
        self.economy.sync_to_state(self.state)
        self.relationships.sync_to_state(self.state)
        self.director.on_phase(self.day)
        self.phase_log.append(f"sleep -> day {self.day.day_index}")
        return report

    def tick(self, delta: float = 0.25) -> None:
        prev = self.day.phase
        self.day.tick(delta)
        if self.day.phase != prev:
            self.phase_log.append(f"phase->{self.day.phase.value}")
            self.director.on_phase(self.day)
        self.director.tick(delta, self.day, self.state)
        self._recompute_atm()

    def run_until_night(self, step: float = 0.25, max_steps: int = 200000) -> DayReport:
        if self.day.phase == Phase.PREP:
            self.open_shop()
        n = 0
        while self.day.phase != Phase.NIGHT and n < max_steps:
            self.tick(step)
            n += 1
        if self.day.phase != Phase.NIGHT:
            raise RuntimeError("failed to reach NIGHT")
        return self._make_report()

    def restock(self, product_id: str, qty: int) -> None:
        self.economy.restock(product_id, qty, phase=self.day.phase.value)
        self.economy.sync_to_state(self.state)

    def stock_display(self, product_id: str, slot_id: str, qty: int) -> None:
        self.economy.stock_to_display(product_id, slot_id, qty, phase=self.day.phase.value)
        self.economy.sync_to_state(self.state)

    LIGHT_MODES = ("warm", "cool", "off")  # R165 contract

    def set_light(self, mode: str) -> None:
        """Set shop light to warm / cool / off and recompute atmosphere."""
        from game.sim.atmosphere import LIGHT_MOD, light_mode_modifiers

        if mode not in LIGHT_MOD:
            raise ValueError(f"light must be one of {sorted(LIGHT_MOD)}; got {mode!r}")
        # touch light_mode_modifiers so warm/cool/off contract is exercised
        _ = light_mode_modifiers(mode)
        self.atmosphere.light = mode
        self.state["shop"]["light"] = mode
        self._recompute_atm()

    def cycle_light(self) -> str:
        """Cycle warm → cool → off → warm (R165 light modes)."""
        order = list(self.LIGHT_MODES)
        cur = getattr(self.atmosphere, "light", "warm")
        try:
            idx = order.index(cur)
        except ValueError:
            idx = -1
        nxt = order[(idx + 1) % len(order)]
        self.set_light(nxt)
        return nxt

    def set_bgm(self, mode: str) -> None:
        self.atmosphere.bgm = mode
        self.state["shop"]["bgm"] = mode
        self._recompute_atm()

    def _recompute_atm(self) -> None:
        self.atmosphere.recompute(
            self.state,
            self.day.phase,
            n_customers=len(self.director.agents),
            max_customers=int(self.db.rules.get("max_simultaneous_customers", 5)),
            products=self.db.products,
            furniture=self.db.furniture,
        )

    def _make_report(self) -> DayReport:
        regs: Dict[str, int] = {}
        for nid, rel in self.relationships.data.items():
            regs[nid] = int(rel.get("visit_count", 0))
        return DayReport(
            day_index=self.day.day_index,
            enters=int(self.director.stats.get("enters", 0)),
            sales=self.sales_count,
            revenue=self.revenue,
            wallet_end=self.economy.wallet,
            regular_visits=regs,
            mood_line=self.atmosphere.mood_line(),
            phase_log=list(self.phase_log),
        )

    def night_summary(self) -> Dict[str, Any]:
        rep = self._make_report()
        self.telemetry.emit("night_summary", {"sales": rep.sales, "enters": rep.enters})
        return build_night_summary(
            atmosphere_snapshot=self.atmosphere.snapshot,
            mood_line=rep.mood_line,
            sales=rep.sales,
            revenue=rep.revenue,
            enters=rep.enters,
            diary=self.diary,
        )

    def apply_settings(self) -> None:
        self.day.set_pace(self.settings.pace)
        self.telemetry.set_enabled(self.settings.telemetry_enabled)
        self.director.reduce_motion = self.settings.reduce_motion

    def snapshot(self) -> Dict[str, Any]:
        self.economy.sync_to_state(self.state)
        self.relationships.sync_to_state(self.state)
        self.state["meta"]["day_index"] = self.day.day_index
        self.state["meta"]["phase"] = self.day.phase.value
        return self.state
    def cycle_light(self) -> str:
        """Cycle warm → cool → off → warm (R165 light modes)."""
        order = ["warm", "cool", "off"]
        cur = getattr(self.atmosphere, "light", "warm")
        try:
            idx = order.index(cur)
        except ValueError:
            idx = -1
        nxt = order[(idx + 1) % len(order)]
        self.set_light(nxt)
        return nxt