import { Image as ExpoImage } from "expo-image";
import React, { useCallback, useEffect, useState } from "react";
import { ActivityIndicator, Text, View } from "react-native";
import useMinuit from "react-native-minuit/src/hooks/useMinuit.js";
import { background, icons } from "../../assets";
import BorderGradientButton from "../../components/BorderGradientButton";
import GradientButton from "../../components/GradientButton";
import MusicLandHeader from "../../components/MusicLandHeader";
import alert from "../../components/Alert";
import firebase, { tasksRef } from "../../config/firebase";
import loaderMessages from "../../config/loaderMessages";
import { isWeb } from "../../hooks/useLayoutType";
import Page from "../../layouts/Page";
import { Routes } from "../../navigation";
import { goBack, navigate } from "../../navigation/NavigationService";
import { useUser } from "../../providers/UserDataProvider";
import { gutters, Palette, Style } from "../../styles";
import CreateLyricsHeader from "../Writing/components/CreateLyricsHeader";
import CustomInput from "../Writing/components/CustomInput";

const PouchReady = () => {
  const { selectedProjectId, selectedProject, updateProjectData } = useUser();
  const { setIsLoading } = useMinuit();
  const isGenerating = selectedProject?.coverStatus === "GENERATING";
  const coverOptions = Array.isArray(selectedProject?.cover?.options)
    ? selectedProject.cover.options
    : [];
  const hasGeneratedOptions = coverOptions.length > 0;
  const coverBackgroundMessage = isWeb
    ? loaderMessages.pouchReadyGenerationWeb
    : "";

  const [coverStyle, setCoverStyle] = useState(
    selectedProject?.coverStyle || ""
  );

  useEffect(() => {
    setCoverStyle(selectedProject?.coverStyle || "");
  }, [selectedProject?.coverStyle]);

  const generateCover = useCallback(async (styleValue) => {
    if (!selectedProjectId) return;
    if (hasGeneratedOptions) {
      return;
    }
    const trimmedStyle = String(styleValue || "").trim();
    if (!trimmedStyle) {
      alert("Attention", "Merci de renseigner un style pour la pochette.", [
        { text: "OK" },
      ]);
      return;
    }
    try {
      await setIsLoading(true);
      await updateProjectData(
        {
          coverStyle: trimmedStyle,
        },
        { merge: true }
      );
      await tasksRef.add({
        type: "cover",
        projectId: selectedProjectId,
        status: "PENDING",
        createdAt: firebase.firestore.FieldValue.serverTimestamp(),
      });
    } catch (e) {
      console.log("Cover task error", e?.message);
    } finally {
      setIsLoading(false);
    }
  }, [hasGeneratedOptions, selectedProjectId, setIsLoading, updateProjectData]);

  const requestCoverGeneration = useCallback(() => {
    const trimmedStyle = (coverStyle || "").trim();
    if (!trimmedStyle) {
      alert("Attention", "Merci de renseigner un style pour la pochette.", [
        { text: "OK" },
      ]);
      return;
    }
    alert("Attention", "Générer une pochette ?", [
      {
        text: "Annuler",
        style: "cancel",
      },
      {
        text: "Oui",
        onPress: () => generateCover(trimmedStyle),
      },
    ]);
  }, [coverStyle, generateCover]);

  const validateCover = () => {
    navigate(Routes.ValidateCover);
  };

  const coverPreviewUrl =
    selectedProject?.cover?.result ||
    selectedProject?.cover?.generatedBackground ||
    null;

  const displayOptions = hasGeneratedOptions
    ? coverOptions
    : coverPreviewUrl
      ? [
          {
            id: "preview",
            finalUrl: selectedProject?.cover?.result || null,
            generatedUrl: coverPreviewUrl,
          },
        ]
      : [];

  return (
    <Page backgroundImg={background.studioBG2} headerType="NONE">
      <MusicLandHeader onPressBack={goBack} progress={72} />
      <View style={{ flex: 1, marginTop: 16 }}>
        <CreateLyricsHeader
          title={
            selectedProject?.cover?.backgroundGenerated
              ? "Ta pochette est prête!"
              : "Génération de la pochette"
          }
          // subTitle="Qu’en penses-tu ?"
        />
        <View style={{ flex: 1, ...Style.containerCenter }}>
          <View style={{ width: "80%", gap: 24 }}>
            <View
              style={{
                width: "100%",
                flexDirection: isWeb ? "row" : "column",
                gap: 16,
                justifyContent: "center",
                flexWrap: "wrap",
              }}
            >
              {displayOptions.length > 0 ? (
                displayOptions.map((option, index) => {
                  const optionUri = option?.finalUrl || option?.generatedUrl || "";
                  if (!optionUri) return null;
                  return (
                    <View
                      key={option?.id || index}
                      style={{
                        width: isWeb ? 280 : "100%",
                        alignItems: "center",
                        gap: 8,
                      }}
                    >
                      <ExpoImage
                        source={{ uri: optionUri }}
                        cachePolicy="memory-disk"
                        priority="high"
                        contentFit="cover"
                        transition={120}
                        style={{
                          width: "100%",
                          height: 260,
                          borderRadius: 20,
                        }}
                      />
                      {hasGeneratedOptions && (
                        <Text
                          style={{
                            color: Palette.white,
                            opacity: 0.7,
                          }}
                        >
                          Pochette {index + 1}
                        </Text>
                      )}
                    </View>
                  );
                })
              ) : (
                <View
                  style={{
                    width: isWeb ? 300 : "100%",
                    height: 300,
                    borderRadius: 20,
                    backgroundColor: "#00000040",
                    alignSelf: "center",
                    ...Style.containerCenter,
                  }}
                >
                  {isGenerating && (
                    <View style={{ alignItems: "center", gap: 8 }}>
                      <ActivityIndicator color={Palette.white} />
                      {isWeb ? (
                        coverBackgroundMessage ? (
                          <Text
                            style={{
                              color: Palette.white,
                              marginTop: 6,
                              textAlign: "center",
                              opacity: 0.9,
                            }}
                          >
                            {coverBackgroundMessage}
                          </Text>
                        ) : null
                      ) : (
                        <Text
                          style={{
                            color: Palette.white,
                            marginTop: 6,
                            textAlign: "center",
                            opacity: 0.9,
                          }}
                        >
                          Génération en cours.
                        </Text>
                      )}
                    </View>
                  )}
                </View>
              )}
            </View>
            <CustomInput
              label="Style de la pochette"
              placeholder="Exemple : Collage rétro futuriste lumineux"
              value={coverStyle}
              setValue={setCoverStyle}
              multiline={false}
              height={55}
              maxLength={120}
            />
          </View>
        </View>
      </View>
      <View
        style={{
          paddingBottom: gutters * 2,
          width: "80%",
          alignSelf: "center",
          gap: 12,
        }}
      >
        {!hasGeneratedOptions && (
          <BorderGradientButton
            title={isGenerating ? "Génération en cours..." : "Générer la pochette"}
            icon={icons.stars}
            onPress={requestCoverGeneration}
            disabled={isGenerating}
          />
        )}
        <GradientButton
          title={isGenerating ? "Veuillez patienter..." : "Valider"}
          disabled={isGenerating || !coverPreviewUrl}
          onPress={() => validateCover()}
        />
      </View>
    </Page>
  );
};

export default PouchReady;