from dataclasses import dataclass
from typing import Union

from enums import Counter, Element, Affinity, MissType, CharacterType
from jsonable import JsonableDataclassArgs
from model import Effect, Target, Action, CombatStatus, LogOnly, log_substitute, Character, Clock


@dataclass(**JsonableDataclassArgs)
class OpportunityEffect(LogOnly, Effect):
    target: Target | None
    opportunity_text: str

    def log_message(self, user: Target | None = None) -> str:
        return f'**Opportunity!!** {log_substitute(self.opportunity_text, user=user, target=self.target)}'


@dataclass(**JsonableDataclassArgs)
class SubActionEffect(Effect):
    action: Action
    trigger_text: str

    def do(self, combat: "CombatStatus", source: Union[Action, "Effect", None] = None) -> "CombatStatus":
        return self.action.do(combat, source)

    def undo(self, combat: "CombatStatus", source: Union[Action, "Effect", None] = None) -> "CombatStatus":
        return self.action.undo(combat, source)

    def log_message(self, user: Target | None = None) -> str | None:
        action_user = (self.action.user
                       if hasattr(self.action, "user") and isinstance(self.action.user, Target)
                       else None)
        action_log = self.action.log_message(user)
        if len(self.trigger_text) != 0:
            trigger_text = log_substitute(self.trigger_text, user=user, target=action_user)
            if action_log is not None:
                return trigger_text + "\n  " + action_log.replace('\n', '\n  ')
            else:
                return trigger_text
        else:
            return action_log


@dataclass(**JsonableDataclassArgs)
class DamageEffect(Effect):
    target: Target
    target_type: CharacterType
    attribute: Counter
    damage: int
    old_value: int
    new_value: int
    max_value: int | None
    element: Element
    affinity: Affinity
    piercing: bool

    def do(self, combat: "CombatStatus", source: Union[Action, "Effect", None] = None) -> "CombatStatus":
        return combat.alter_character(self.target, lambda c: c.set_counter_current(self.attribute, self.new_value))

    def undo(self, combat: "CombatStatus", source: Union[Action, "Effect", None] = None) -> "CombatStatus":
        return combat.alter_character(self.target, lambda c: c.set_counter_current(self.attribute, self.old_value))

    def log_message(self, user: Target | None = None) -> str:
        state_change = None
        if self.attribute == Counter.HP:
            if self.old_value > self.new_value == 0:
                state_change = ['+ **KO**']
            elif self.new_value > self.old_value == 0:
                if self.new_value * 2 > self.max_value:
                    state_change = ['- **KO**']
                else:
                    state_change = ['- **KO**', '+ **Crisis**']
            elif self.old_value * 2 > self.max_value >= self.new_value * 2:
                state_change = '+ **Crisis**'
            elif self.new_value * 2 > self.max_value >= self.old_value * 2:
                state_change = '- **Crisis**'
        affinity = ''
        if self.affinity == Affinity.Absorb:
            affinity = "?"
        elif self.affinity == Affinity.Immune:
            affinity = " ✖"
        elif self.affinity == Affinity.Resistant:
            affinity = "…"
        elif self.affinity == Affinity.Vulnerable:
            affinity = "‼"
        attribute = (f'{self.element.value}{"!" if self.piercing else ""}'
                     if self.attribute == Counter.HP
                     else f'{self.attribute.ctr_name_abbr(self.target_type)}')
        sign = '-' if self.damage >= 0 else '+'
        return '\n'.join(
            [log_substitute(
                f'@T: [{sign}{abs(self.damage)}{affinity}] {attribute}',
                user=user, target=self.target)] +
            [log_substitute(f'@T: [{s}]') for s in state_change])


@dataclass(**JsonableDataclassArgs)
class StatusEffect(Effect):
    target: Target
    old_status: str | None
    new_status: str | None

    @staticmethod
    def alter_status(c: Character, old_status: str | None, new_status: str | None) -> Character:
        if old_status is None and new_status is not None:
            return c.add_status(new_status)
        elif new_status is None and old_status is not None:
            return c.remove_status(old_status)
        elif new_status is not None and old_status is not None:
            return c.replace_status(old_status, new_status)
        else:
            return c

    def __post_init__(self):
        if self.old_status is None and self.new_status is None:
            raise ValueError("At least one of old_status or new_status must be non-None")

    def do(self, combat: CombatStatus, source: Union[Action, Effect, None] = None) -> CombatStatus:
        return combat.alter_character(
            self.target, lambda c: StatusEffect.alter_status(c, self.old_status, self.new_status))

    def undo(self, combat: CombatStatus, source: Union[Action, Effect, None] = None) -> CombatStatus:
        return combat.alter_character(
            self.target, lambda c: StatusEffect.alter_status(c, self.new_status, self.old_status))

    def log_message(self, user: Target | None = None) -> str | None:
        if self.old_status is not None and self.new_status is None:
            return log_substitute(v=f'@T: [- {self.old_status}]', user=user, target=self.target)
        if self.new_status is not None and self.old_status is None:
            return log_substitute(v=f'@T: [+ {self.old_status}]', user=user, target=self.target)
        if self.old_status is not None and self.new_status is not None:
            return log_substitute(v=f'@T: [{self.old_status} -> {self.new_status}]', user=user, target=self.target)
        pass


@dataclass(**JsonableDataclassArgs)
class FPBonusEffect(Effect):
    user: Target
    rerolls: int
    modifier: int
    fp_spent: int
    old_fp: int
    new_fp: int

    def do(self, combat: CombatStatus, source: Union[Action, Effect, None] = None) -> CombatStatus:
        return combat.alter_character(
            self.user,
            lambda c: c.set_counter_current(Counter.SP, self.new_fp)
        ).add_fp_spent(self.fp_spent)

    def undo(self, combat: CombatStatus, source: Union[Action, Effect, None] = None) -> CombatStatus:
        return combat.alter_character(
            self.user,
            lambda c: c.set_counter_current(Counter.SP, self.old_fp)
        ).add_fp_spent(-self.fp_spent)

    def log_message(self, user: Target | None = None) -> str | None:
        bonuses = []
        if self.rerolls > 0:
            if self.rerolls > 1:
                bonuses.append(f"{self.rerolls} rerolls")
            else:
                bonuses.append("a reroll")
        if self.modifier != 0:
            bonuses.append(f"a {self.modifier:+} {'bonus' if self.modifier > 0 else 'penalty'}")
        if len(bonuses) == 0:
            return None
        affected = ''
        if self.user != user:
            affected = log_substitute(" on @U's roll", user=user, target=self.user)
        return f"{log_substitute('@T', user=user, target=self.user)} " \
               f"spent **{self.fp_spent} FP** for {' and '.join(bonuses)}{affected}!"


@dataclass(**JsonableDataclassArgs)
class MissEffect(LogOnly, Effect):
    miss_type: MissType
    target: Target

    def log_message(self, user: Target | None = None) -> str | None:
        if self.miss_type == MissType.Missed:
            return log_substitute(f"It missed @T!", user=user, target=self.target)
        elif self.miss_type == MissType.Dodged:
            return log_substitute(f"@T dodged it!", user=user, target=self.target)
        elif self.miss_type == MissType.Avoided:
            return log_substitute(f"@T avoided it!", user=user, target=self.target)
        elif self.miss_type == MissType.Blocked:
            return log_substitute("@T blocked it!", user=user, target=self.target)
        elif self.miss_type == MissType.Immunity:
            return log_substitute("@T is immune!", user=user, target=self.target)
        elif self.miss_type == MissType.Repelled:
            return log_substitute("@T repelled it!", user=user, target=self.target)
        elif self.miss_type == MissType.Countered:
            return log_substitute("@T countered it!", user=user, target=self.target)
        elif self.miss_type == MissType.Parried:
            return log_substitute("@T parried it!", user=user, target=self.target)
        elif self.miss_type == MissType.Protected:
            return log_substitute("@T was protected from it!", user=user, target=self.target)
        elif self.miss_type == MissType.Resisted:
            return log_substitute("@T resisted it!", user=user, target=self.target)
        elif self.miss_type == MissType.Shielded:
            return log_substitute("@T shielded against it!", user=user, target=self.target)
        else:
            return log_substitute(f"@T: {self.miss_type.value}", user=user, target=self.target)


@dataclass(**JsonableDataclassArgs)
class GeneralEffect(LogOnly, Effect):
    text: str
    target: Target | None

    def log_message(self, user: Target | None = None) -> str | None:
        return log_substitute(self.text, user=user, target=self.target)


@dataclass(**JsonableDataclassArgs)
class ClockTickEffect(Effect):
    clock_index: int
    old_definition: Clock
    new_value: int
    delta: int

    def do(self, combat: "CombatStatus", source: Union[Action, "Effect", None] = None) -> "CombatStatus":
        return combat.alter_clock(self.clock_index, lambda c: c.set_value(self.new_value))

    def undo(self, combat: "CombatStatus", source: Union[Action, "Effect", None] = None) -> "CombatStatus":
        return combat.alter_clock(self.clock_index, lambda c: c.set_value(self.old_definition.current))

    def log_message(self, user: Target | None = None) -> str | None:
        return (f'The clock **{self.old_definition.name}** ticked {"up" if self.delta > 0 else "down"} {self.delta} '
                f'tick{"" if abs(self.delta) == 1 else "s"}.')