use crate::components::multiselect;
use crate::icons;
use crate::models::exercises::ExerciseVariant;
use crate::models::workouts::WorkoutExercise;
use crate::util::string_into_vec;
use crate::{AppError, layouts, util::AppState};
use axum::response::IntoResponse;
use axum::routing::{delete_service, post};
use axum::{Router, extract::State, http::StatusCode, routing::get};
use axum_extra::extract::Form;
use itertools::Itertools;
use maud::{Markup, html};
use serde::Deserialize;
use uuid::Uuid;

pub fn routes() -> Router<AppState> {
    Router::new()
        .route("/", get(page).post(submit))
        .route("/exercise_list", post(exercise_list))
}

async fn page(State(state): State<AppState>) -> Result<Markup, AppError> {
    let muscles = sqlx::query_as!(crate::models::Muscle, "SELECT * FROM muscles")
        .fetch_all(&state.pool)
        .await?;

    let categories = sqlx::query_as!(crate::models::Category, "SELECT * FROM categories")
        .fetch_all(&state.pool)
        .await?;

    let content = html! {
        h1 class="mb-5" { "New Workout" }

        div x-data="{ exercises: [] }" {
            form hx-post="/workouts/new" class="space-y-1" {
                fieldset class="fieldset" {
                    legend class="fieldset-legend" { "Name" }
                    input required="true" name="name" class="input" {}
                }

                fieldset class="fieldset" {
                    legend class="fieldset-legend" { "Description" }
                    textarea required="true" name="description" class="textarea" {}
                }

                h2 class="mb-3" { "Exercises" }

                ul class="list space-y-3" {
                    template x-for="(value, index) in exercises" {
                        li class="bg-base-200 p-3 rounded" {
                            div class="mb-3" {
                                div class="flex" {
                                    h3 x-text="value.name" class="" {}
                                    button type="button" class="btn btn-error btn-sm ml-auto" x-on:click="exercises.splice(index, 1)" { "Delete" }
                                }
                                div x-text="value.description" class="text-sm opacity-50" {}
                            }
                            div class="mb-3" {
                                select x-model="value.type" class="select select-sm" {
                                    option disabled selected value="none" { "Type" }
                                    option value="time" { "Time" }
                                    option value="number" { "Sets/ Reps" }
                                    option value="failure" { "Failure" }
                                }
                            }
                            div class="" {
                                input type="hidden" name="exercises" x-bind:value="JSON.stringify(value)" {}
                                template x-if="value.type === 'time'" {
                                    div {
                                        fieldset class="fieldset" {
                                            legend class="fieldset-legend" { "Time in seconds" }
                                            input "x-model.number"="value.time" type="number" class="input input-sm" required min="1" title="Must be at least 1 second" {}
                                        }
                                    }

                                }
                                template x-if="value.type === 'number'" {
                                    div  {
                                        fieldset class="fieldset" {
                                            legend class="fieldset-legend" { "Number of sets" }
                                            input "x-model.number"="value.sets" type="number" class="input input-sm" required min="1" title="Must be at least 1" {}
                                        }
                                        fieldset class="fieldset" {
                                            legend class="fieldset-legend" { "Number of reps per set" }
                                            input "x-model.number"="value.reps" type="number" class="input input-sm" required min="1" title="Must be at least 1" {}
                                        }
                                    }
                                }
                            }
                        }
                    }
                }

                button type="button" onclick="exercise_modal.showModal()" class="btn" { "Add exercise +" }

                input type="submit" class="btn" value="save" { }
            }

            dialog id="exercise_modal" class="modal modal-bottom sm:modal-middle" {
                div class="modal-box" {
                    h3 class="mb-3" { "Search Exercises"}
                    label class="input mb-2 w-full" {
                        div class="h-[1.2em] opacity-50" {
                            (icons::search())
                        }
                        input type="search" name="search" hx-post="/workouts/new/exercise_list" hx-trigger="input changed delay:500ms, keyup[key=='enter'], load" hx-target="#exercise_list" class="grow" placeholder="Search" {}
                    }
                    div class="flex flex-wrap gap-2 mb-5" {
                        select class="select select-sm w-32" {
                            option selected { "All Muscles" }
                            @for muscle in muscles {
                                option value=(muscle.muscle_id) { (muscle.name) }
                            }
                        }
                        select class="select select-sm w-36" {
                            option selected { "All Categories" }
                            @for category in categories {
                                option value=(category.category_id) { (category.name) }
                            }
                        }
                    }
                    ul id="exercise_list" {}
                    div class="modal-action" {
                        form method="dialog" novalidate {
                            button class="btn" { "Close" }
                        }
                    }

                }
            }
        }

    };

    Ok(layouts::desktop(content, "New Exercise"))
}

#[derive(Deserialize, Debug)]
struct FormData {
    name: String,
    description: String,
    exercises: Vec<String>,
}

#[derive(Deserialize, Debug)]
#[serde(tag = "type")]
enum ExerciseType {
    #[serde(rename = "time")]
    ExerciseTime(ExerciseTime),
    #[serde(rename = "number")]
    ExerciseNumber(ExerciseNumber),
    #[serde(rename = "failure")]
    ExerciseFailure(ExerciseFailure),
}

#[derive(Deserialize, Debug)]
struct ExerciseTime {
    id: Uuid,
    time: i32,
}

#[derive(Deserialize, Debug)]
struct ExerciseNumber {
    id: Uuid,
    sets: i32,
    reps: i32,
}

#[derive(Deserialize, Debug)]
struct ExerciseFailure {
    id: Uuid,
}

fn from_exercise_type_into_workout_exercise(
    exercise_type: ExerciseType,
    workout_id: Uuid,
    position: i32,
) -> WorkoutExercise {
    match exercise_type {
        ExerciseType::ExerciseTime(time) => WorkoutExercise {
            workout_id,
            exercise_id: time.id,
            exercise_type: ExerciseVariant::Time,
            position,
            sets: None,
            reps: None,
            time: Some(time.time),
        },
        ExerciseType::ExerciseNumber(number) => WorkoutExercise {
            workout_id,
            exercise_id: number.id,
            exercise_type: ExerciseVariant::Number,
            position,
            sets: Some(number.sets),
            reps: Some(number.reps),
            time: None,
        },
        ExerciseType::ExerciseFailure(failure) => WorkoutExercise {
            workout_id,
            exercise_id: failure.id,
            exercise_type: ExerciseVariant::Failure,
            position,
            sets: None,
            reps: None,
            time: None,
        },
    }
}

async fn submit(
    State(state): State<AppState>,
    Form(form): Form<FormData>,
) -> Result<impl IntoResponse, AppError> {
    let workout_id = Uuid::new_v4();

    let mut exercises: Vec<ExerciseType> = vec![];

    // Convert exercises string into releveant objects
    for exercise_str in form.exercises {
        tracing::info!("exercise string: {:?}", exercise_str);
        match serde_json::from_str::<ExerciseType>(&exercise_str) {
            Ok(ex) => exercises.push(ex),
            Err(err) => tracing::error!("Failed to parse exercise: {:?}", err),
        }
    }

    tracing::info!("{:?}", exercises);

    let (workout_ids, exercise_ids, exercise_types, positions, sets, reps, times): (
        Vec<_>,
        Vec<_>,
        Vec<_>,
        Vec<_>,
        Vec<_>,
        Vec<_>,
        Vec<_>,
    ) = exercises
        .into_iter()
        .enumerate()
        .map(|(index, e)| {
            let we = from_exercise_type_into_workout_exercise(e, workout_id, index as i32);
            (
                we.workout_id,
                we.exercise_id,
                we.exercise_type,
                we.position,
                we.sets,
                we.reps,
                we.time,
            )
        })
        .multiunzip();

    let mut transaction = state.pool.begin().await?;

    sqlx::query!(
        "INSERT INTO workouts (workout_id, name, description) VALUES ($1, $2, $3)",
        &workout_id,
        &form.name,
        &form.description,
    )
    .execute(&mut *transaction)
    .await?;

    sqlx::query!(
        "
            INSERT INTO workout_exercises (workout_id, exercise_id, exercise_type, position, sets, reps, time)
            SELECT * FROM UNNEST($1::uuid[], $2::uuid[], $3::exercise_variant[], $4::int[], $5::int[], $6::int[], $7::int[])
        ",
        &workout_ids,
        &exercise_ids,
        &exercise_types as &[ExerciseVariant],
        &positions,
        &sets as &[Option<i32>],
        &reps as &[Option<i32>],
        &times as &[Option<i32>],
    ).execute(&mut *transaction).await?;

    transaction.commit().await?;

    Ok(html! {
        p {
            "New exercise has been created!"
        }
    })
}

#[derive(Debug, Deserialize)]
pub struct SearchData {
    search: String,
}

async fn exercise_list(
    State(state): State<AppState>,
    Form(form): Form<SearchData>,
) -> Result<Markup, AppError> {
    let pattern = format!("%{}%", form.search);

    let exercises = sqlx::query_as!(
        crate::models::Exercise,
        "SELECT exercise_id, name, description FROM exercises WHERE name ILIKE $1",
        &pattern
    )
    .fetch_all(&state.pool)
    .await?;

    Ok(html! {
        ul class="list" id="exercise_list" {
            @for exercise in exercises {
                li x-on:click={"exercises.push({ id: '"(exercise.exercise_id)"', name: '"(exercise.name)"', description: '"(exercise.description)"', type: 'none' }); exercise_modal.close()"} class="list-row py-2 hover:cursor-pointer" {
                    div {
                        div class="font-bold" { (exercise.name) }
                        div { (exercise.description) }
                    }
                }
            }
        }
    })
}