using UnityEngine;

namespace Ashwild.Player
{
    /// <summary>
    /// Which of the player's two rigs a set of clips is authored for. The same item needs two
    /// different sets: the owner's first-person arms play hand-only clips, while the third-person
    /// body everyone else sees plays full-body clips with legs and torso.
    /// </summary>
    public enum PlayerAnimationRig
    {
        Arms,
        Body
    }

    /// <summary>
    /// The clips one rig plays for one family of held item (bare hands, axe, pickaxe, sword…).
    /// This is the asset that makes the animation system extensible without code: the master
    /// Animator Controller authors the state machine once with placeholder clips, and each set
    /// merely swaps which clip sits in each slot. Adding a new weapon is two assets and one field
    /// on its ItemData — never a new controller, never a new state, never a new script.
    ///
    /// Slots are matched by the *name* of the placeholder clip in the master controller, so an
    /// authored state named "Run" pulls this set's run clip. A slot left empty falls back to the
    /// binder's default set and then to the master's own placeholder, which is why a minimal set
    /// (a torch with only an idle and a run) is perfectly valid and never leaves a rig in T-pose.
    /// </summary>
    [CreateAssetMenu(fileName = "NewAnimationSet", menuName = "Ashwild/Player Animation Set")]
    public class PlayerAnimationSet : ScriptableObject
    {
        #region Slot Names

        public const string SlotIdle = "Idle";
        public const string SlotWalk = "Walk";
        public const string SlotRun = "Run";
        public const string SlotCrouchIdle = "CrouchIdle";
        public const string SlotCrouchWalk = "CrouchWalk";
        public const string SlotJumpStart = "JumpStart";
        public const string SlotJumpLoop = "JumpLoop";
        public const string SlotJumpLand = "JumpLand";
        public const string SlotGrab = "Grab";
        public const string SlotEquip = "Equip";
        public const string SlotUnequip = "Unequip";

        /// <summary>
        /// Prefix of the attack slots ("Attack1", "Attack2", …). Numbered rather than enumerated so a
        /// three-hit sword combo and a single pickaxe swing share the exact same master controller.
        /// </summary>
        public const string SlotAttackPrefix = "Attack";

        #endregion

        #region Serialized Fields

        [Header("Locomotion")]
        [SerializeField] private AnimationClip idle;
        [SerializeField] private AnimationClip walk;
        [SerializeField] private AnimationClip run;
        [SerializeField] private AnimationClip crouchIdle;
        [SerializeField] private AnimationClip crouchWalk;

        [Header("Air")]
        [SerializeField] private AnimationClip jumpStart;
        [SerializeField] private AnimationClip jumpLoop;
        [SerializeField] private AnimationClip jumpLand;

        [Header("Actions")]
        [SerializeField] private AnimationClip grab;
        [SerializeField] private AnimationClip equip;
        [SerializeField] private AnimationClip unequip;

        [Header("Attack")]
        [Tooltip("Swing variants, in combo order. One entry for a plain tool, several for a weapon combo.")]
        [SerializeField] private AnimationClip[] attackVariants;

        #endregion

        #region Public API

        /// <summary>
        /// How many swing variants this set offers, so the swinging item can cycle through a combo
        /// without hard-coding a count it cannot see.
        /// </summary>
        public int AttackVariantCount => attackVariants != null ? attackVariants.Length : 0;

        /// <summary>
        /// Resolves the clip authored for a slot, or null when this set does not cover it (the caller
        /// then falls back). Attack slots are resolved by their trailing number, which is 1-based in the
        /// controller ("Attack1" is the first variant) so designers read the states in combo order.
        /// </summary>
        public AnimationClip GetClip(string slotName)
        {
            switch (slotName)
            {
                case SlotIdle: return idle;
                case SlotWalk: return walk;
                case SlotRun: return run;
                case SlotCrouchIdle: return crouchIdle;
                case SlotCrouchWalk: return crouchWalk;
                case SlotJumpStart: return jumpStart;
                case SlotJumpLoop: return jumpLoop;
                case SlotJumpLand: return jumpLand;
                case SlotGrab: return grab;
                case SlotEquip: return equip;
                case SlotUnequip: return unequip;
            }

            if (slotName != null && slotName.StartsWith(SlotAttackPrefix) &&
                int.TryParse(slotName.Substring(SlotAttackPrefix.Length), out int variant))
                return GetAttackVariant(variant - 1);

            return null;
        }

        /// <summary>
        /// The swing clip at a combo index, or null when out of range — an unauthored variant simply
        /// falls back instead of throwing mid-fight.
        /// </summary>
        public AnimationClip GetAttackVariant(int index)
        {
            if (attackVariants == null || index < 0 || index >= attackVariants.Length) return null;
            return attackVariants[index];
        }

        #endregion
    }
}