use crate::big_fish::tables::{big_fish_asset_slot, big_fish_creation_session};
use crate::*;
use module_big_fish::{EvaluateBigFishPublishReadinessCommand, evaluate_publish_readiness};

#[spacetimedb::procedure]
pub fn generate_big_fish_asset(
    ctx: &mut ProcedureContext,
    input: BigFishAssetGenerateInput,
) -> BigFishSessionProcedureResult {
    match ctx.try_with_tx(|tx| generate_big_fish_asset_tx(tx, input.clone())) {
        Ok(session) => BigFishSessionProcedureResult {
            ok: true,
            session: Some(session),
            error_message: None,
        },
        Err(message) => BigFishSessionProcedureResult {
            ok: false,
            session: None,
            error_message: Some(message),
        },
    }
}

#[spacetimedb::procedure]
pub fn publish_big_fish_game(
    ctx: &mut ProcedureContext,
    input: BigFishPublishInput,
) -> BigFishSessionProcedureResult {
    match ctx.try_with_tx(|tx| publish_big_fish_game_tx(tx, input.clone())) {
        Ok(session) => BigFishSessionProcedureResult {
            ok: true,
            session: Some(session),
            error_message: None,
        },
        Err(message) => BigFishSessionProcedureResult {
            ok: false,
            session: None,
            error_message: Some(message),
        },
    }
}

pub(crate) fn generate_big_fish_asset_tx(
    ctx: &ReducerContext,
    input: BigFishAssetGenerateInput,
) -> Result<BigFishSessionSnapshot, String> {
    let session = ctx
        .db
        .big_fish_creation_session()
        .session_id()
        .find(&input.session_id)
        .filter(|row| row.owner_user_id == input.owner_user_id)
        .ok_or_else(|| "big_fish_creation_session 不存在".to_string())?;
    let draft = session
        .draft_json
        .as_deref()
        .ok_or_else(|| "big_fish.draft 尚未编译".to_string())
        .and_then(|value| deserialize_draft(value).map_err(|error| error.to_string()))?;
    validate_asset_generate_input(&input, &draft).map_err(|error| error.to_string())?;

    let slot = build_generated_asset_slot(
        &input.session_id,
        &draft,
        input.asset_kind,
        input.level,
        input.motion_key.clone(),
        input.asset_url.clone(),
        input.generated_at_micros,
    )
    .map_err(|error| error.to_string())?;
    upsert_big_fish_asset_slot(ctx, slot);

    let asset_slots = list_big_fish_asset_slots(ctx, &session.session_id);
    let readiness = evaluate_publish_readiness(
        EvaluateBigFishPublishReadinessCommand {
            session_id: session.session_id.clone(),
            owner_user_id: session.owner_user_id.clone(),
            draft: Some(draft.clone()),
            evaluated_at_micros: input.generated_at_micros,
        },
        &asset_slots,
    )
    .map_err(|error| error.to_string())?;
    let coverage = build_asset_coverage(Some(&draft), &asset_slots);
    let updated_at = Timestamp::from_micros_since_unix_epoch(input.generated_at_micros);
    let uses_placeholder = input
        .asset_url
        .as_deref()
        .map(str::trim)
        .is_none_or(str::is_empty);
    let reply = match (input.asset_kind, uses_placeholder) {
        (BigFishAssetKind::LevelMainImage, true) => "本级主图占位图已生成，可在结果页继续预览。",
        (BigFishAssetKind::LevelMainImage, false) => "本级主图已正式生成，可在结果页继续预览。",
        (BigFishAssetKind::LevelMotion, true) => "本级动作占位图已生成，可在结果页继续预览。",
        (BigFishAssetKind::LevelMotion, false) => "本级动作图已正式生成，可在结果页继续预览。",
        (BigFishAssetKind::StageBackground, true) => {
            "活动区域背景占位图已生成，可在结果页继续预览。"
        }
        (BigFishAssetKind::StageBackground, false) => {
            "活动区域背景已正式生成，可在结果页继续预览。"
        }
    }
    .to_string();
    let next_stage = if readiness.readiness.publish_ready {
        BigFishCreationStage::ReadyToPublish
    } else {
        BigFishCreationStage::AssetRefining
    };
    let next_session = BigFishCreationSession {
        session_id: session.session_id.clone(),
        owner_user_id: session.owner_user_id.clone(),
        seed_text: session.seed_text.clone(),
        current_turn: session.current_turn,
        progress_percent: if readiness.readiness.publish_ready {
            96
        } else {
            88
        },
        stage: next_stage,
        anchor_pack_json: session.anchor_pack_json.clone(),
        draft_json: session.draft_json.clone(),
        asset_coverage_json: serialize_asset_coverage(&coverage)
            .map_err(|error| error.to_string())?,
        last_assistant_reply: Some(reply.clone()),
        publish_ready: readiness.readiness.publish_ready,
        play_count: session.play_count,
        remix_count: session.remix_count,
        like_count: session.like_count,
        published_at: session.published_at,
        created_at: session.created_at,
        updated_at,
        visible: session.visible,
    };
    replace_big_fish_session(ctx, &session, next_session);
    for event in readiness.events {
        emit_big_fish_publish_readiness_event(ctx, event)?;
    }

    get_big_fish_session_tx(
        ctx,
        BigFishSessionGetInput {
            session_id: input.session_id,
            owner_user_id: input.owner_user_id,
        },
    )
}

pub(crate) fn publish_big_fish_game_tx(
    ctx: &ReducerContext,
    input: BigFishPublishInput,
) -> Result<BigFishSessionSnapshot, String> {
    validate_publish_input(&input).map_err(|error| error.to_string())?;
    let session = ctx
        .db
        .big_fish_creation_session()
        .session_id()
        .find(&input.session_id)
        .filter(|row| row.owner_user_id == input.owner_user_id)
        .ok_or_else(|| "big_fish_creation_session 不存在".to_string())?;
    let draft = session
        .draft_json
        .as_deref()
        .ok_or_else(|| "big_fish.draft 尚未编译".to_string())
        .and_then(|value| deserialize_draft(value).map_err(|error| error.to_string()))?;
    let asset_slots = list_big_fish_asset_slots(ctx, &session.session_id);
    let readiness = evaluate_publish_readiness(
        EvaluateBigFishPublishReadinessCommand {
            session_id: session.session_id.clone(),
            owner_user_id: session.owner_user_id.clone(),
            draft: Some(draft.clone()),
            evaluated_at_micros: input.published_at_micros,
        },
        &asset_slots,
    )
    .map_err(|error| error.to_string())?;
    let coverage = build_asset_coverage(Some(&draft), &asset_slots);
    if !readiness.readiness.publish_ready {
        return Err(format!(
            "big_fish 发布校验未通过：{}",
            readiness.readiness.blockers.join("；")
        ));
    }

    let published_at = Timestamp::from_micros_since_unix_epoch(input.published_at_micros);
    let next_session = BigFishCreationSession {
        session_id: session.session_id.clone(),
        owner_user_id: session.owner_user_id.clone(),
        seed_text: session.seed_text.clone(),
        current_turn: session.current_turn,
        progress_percent: 100,
        stage: BigFishCreationStage::Published,
        anchor_pack_json: session.anchor_pack_json.clone(),
        draft_json: session.draft_json.clone(),
        asset_coverage_json: serialize_asset_coverage(&coverage)
            .map_err(|error| error.to_string())?,
        last_assistant_reply: Some("玩法已发布，可以进入测试运行态。".to_string()),
        publish_ready: true,
        play_count: session.play_count,
        remix_count: session.remix_count,
        like_count: session.like_count,
        published_at: Some(published_at),
        created_at: session.created_at,
        updated_at: published_at,
        visible: session.visible,
    };
    replace_big_fish_session(ctx, &session, next_session);
    for event in readiness.events {
        emit_big_fish_publish_readiness_event(ctx, event)?;
    }

    get_big_fish_session_tx(
        ctx,
        BigFishSessionGetInput {
            session_id: input.session_id,
            owner_user_id: input.owner_user_id,
        },
    )
}

pub(crate) fn list_big_fish_asset_slots(
    ctx: &ReducerContext,
    session_id: &str,
) -> Vec<BigFishAssetSlotSnapshot> {
    let mut slots = ctx
        .db
        .big_fish_asset_slot()
        .by_big_fish_asset_session_id()
        .filter(&session_id.to_string())
        .map(|slot| BigFishAssetSlotSnapshot {
            slot_id: slot.slot_id,
            session_id: slot.session_id,
            asset_kind: slot.asset_kind,
            level: slot.level,
            motion_key: slot.motion_key,
            status: slot.status,
            asset_url: slot.asset_url,
            prompt_snapshot: slot.prompt_snapshot,
            updated_at_micros: slot.updated_at.to_micros_since_unix_epoch(),
        })
        .collect::<Vec<_>>();
    slots.sort_by_key(|slot| {
        (
            slot.level.unwrap_or(0),
            slot.asset_kind.as_str().to_string(),
            slot.motion_key.clone().unwrap_or_default(),
            slot.slot_id.clone(),
        )
    });
    slots
}

pub(crate) fn upsert_big_fish_asset_slot(ctx: &ReducerContext, slot: BigFishAssetSlotSnapshot) {
    if let Some(existing) = ctx.db.big_fish_asset_slot().slot_id().find(&slot.slot_id) {
        ctx.db
            .big_fish_asset_slot()
            .slot_id()
            .delete(&existing.slot_id);
    }
    ctx.db.big_fish_asset_slot().insert(BigFishAssetSlot {
        slot_id: slot.slot_id,
        session_id: slot.session_id,
        asset_kind: slot.asset_kind,
        level: slot.level,
        motion_key: slot.motion_key,
        status: slot.status,
        asset_url: slot.asset_url,
        prompt_snapshot: slot.prompt_snapshot,
        updated_at: Timestamp::from_micros_since_unix_epoch(slot.updated_at_micros),
    });
}